Module BGL
[frames | no frames]

Module BGL

The Blender.BGL submodule (the OpenGL wrapper).

New: some GLU functions: gluLookAt, etc.

The Blender.BGL submodule

This module wraps OpenGL constants and functions, making them available from within Blender Python.

The complete list can be retrieved from the module itself, by listing its contents: dir(Blender.BGL). A simple search on the net can point to more than enough material to teach OpenGL programming, from books to many collections of tutorials.

The "red book": "OpenGL Programming Guide: The Official Guide to Learning OpenGL" and the online NeHe tutorials are two of the best resources.

Example:
 import Blender
 from Blender.BGL import *
 from Blender import Draw
 R = G = B = 0
 A = 1
 title = "Testing BGL  + Draw"
 instructions = "Use mouse buttons or wheel to change the background color."
 quitting = " Press ESC or q to quit."
 len1 = Draw.GetStringWidth(title)
 len2 = Draw.GetStringWidth(instructions + quitting)
 #
 def show_win():
   glClearColor(R,G,B,A)                # define color used to clear buffers 
   glClear(GL_COLOR_BUFFER_BIT)         # use it to clear the color buffer
   glColor3f(0.35,0.18,0.92)            # define default color
   glBegin(GL_POLYGON)                  # begin a vertex data list
   glVertex2i(165, 158)
   glVertex2i(252, 55)
   glVertex2i(104, 128)
   glEnd()
   glColor3f(0.4,0.4,0.4)               # change default color
   glRecti(40, 96, 60+len1, 113)
   glColor3f(1,1,1)
   glRasterPos2i(50,100)                # move cursor to x = 50, y = 100
   Draw.Text(title)                     # draw this text there
   glRasterPos2i(350,40)                # move cursor again
   Draw.Text(instructions + quitting)   # draw another msg
   glBegin(GL_LINE_LOOP)                # begin a vertex-data list
   glVertex2i(46,92)
   glVertex2i(120,92)
   glVertex2i(120,115)
   glVertex2i(46,115)
   glEnd()                              # close this list
 #
 def ev(evt, val):                      # event callback for Draw.Register()
   global R,G,B,A                       # ... it handles input events
   if evt == Draw.ESCKEY or evt == Draw.QKEY:
     Draw.Exit()                        # this quits the script
   elif not val: return
   elif evt == Draw.LEFTMOUSE: R = 1 - R
   elif evt == Draw.MIDDLEMOUSE: G = 1 - G
   elif evt == Draw.RIGHTMOUSE: B = 1 - B
   elif evt == Draw.WHEELUPMOUSE:
     R += 0.1
     if R > 1: R = 1
   elif evt == Draw.WHEELDOWNMOUSE:
     R -= 0.1
     if R < 0: R = 0
   else:
     return                             # don't redraw if nothing changed
   Draw.Redraw(1)                       # make changes visible.
 #
 Draw.Register(show_win, ev, None)      # start the main loop

Note: you can use the Image module and Image.Image bpy object to load and set textures. See Image.Image.glLoad and Image.Image.glFree, for example.

See Also:
www.opengl.org, nehe.gamedev.net
Classes
Buffer The Buffer object is simply a block of memory that is delineated and initialized by the user.

Function Summary
  glAccum(op, value)
Operate on the accumulation buffer
  glAlphaFunc(func, ref)
Specify the alpha test function
  glAreTexturesResident(n, textures, residences)
Determine if textures are loaded in texture memory
  glBegin(mode)
Delimit the vertices of a primitive or a group of like primatives
  glBindTexture(target, texture)
Bind a named texture to a textureing target
  glBitmap(width, height, xorig, yorig, xmove, ymove, bitmap)
Draw a bitmap
  glBlendFunc(sfactor, dfactor)
Specify pixel arithmetic
  glCallList(list)
Execute a display list
  glCallLists(n, type, lists)
Execute a list of display lists
  glClear(mask)
Clear buffers to preset values
  glClearAccum(red, green, blue, alpha)
Specify clear values for the accumulation buffer
  glClearColor(red, green, blue, alpha)
Specify clear values for the color buffers
  glClearDepth(depth)
Specify the clear value for the depth buffer
  glClearIndex(c)
Specify the clear value for the color index buffers
  glClearStencil(s)
Specify the clear value for the stencil buffer
  glClipPlane(plane, equation)
Specify a plane against which all geometery is clipped
  glColor(red, green, blue, alpha)
glColor3b, glColor3d, glColor3f, glColor3i, glColor3s, glColor3ub, glColor3ui, glColor3us, glColor4b, glColor4d, glColor4f, glColor4i, glColor4s, glColor4ub, glColor4ui, glColor4us, glColor3bv, glColor3dv, glColor3fv, glColor3iv, glColor3sv, glColor3ubv, glColor3uiv, glColor3usv, glColor4bv, glColor4dv, glColor4fv, glColor4iv, glColor4sv, glColor4ubv, glColor4uiv, glColor4usv
  glColorMask(red, green, blue, alpha)
Enable and disable writing of frame buffer color components
  glColorMaterial(face, mode)
Cause a material color to track the current color
  glCopyPixels(x, y, width, height, type)
Copy pixels in the frame buffer
  glCullFace(mode)
Specify whether front- or back-facing facets can be culled
  glDeleteLists(list, range)
Delete a contiguous group of display lists
  glDeleteTextures(n, textures)
Delete named textures
  glDepthFunc(func)
Specify the value used for depth buffer comparisons
  glDepthMask(flag)
Enable or disable writing into the depth buffer
  glDepthRange(zNear, zFar)
Specify mapping of depth values from normalized device coordinates to window coordinates
  glDisable(cap)
Disable server-side GL capabilities
  glDrawBuffer(mode)
Specify which color buffers are to be drawn into
  glDrawPixels(width, height, format, type, pixels)
Write a block of pixels to the frame buffer
  glEdgeFlag(flag)
glEdgeFlag, glEdgeFlagv
  glEnable(cap)
Enable server-side GL capabilities
  glEnd()
Delimit the vertices of a primitive or group of like primitives
  glEndList()
Create or replace a display list
  glEvalCoord(u, v)
glEvalCoord1d, glEvalCoord1f, glEvalCoord2d, glEvalCoord2f, glEvalCoord1dv, glEvalCoord1fv, glEvalCoord2dv, glEvalCoord2fv
  glEvalMesh(mode, i1, i2)
glEvalMesh1 or glEvalMesh2
  glEvalPoint(i, j)
glEvalPoint1 and glEvalPoint2
  glFeedbackBuffer(size, type, buffer)
Controls feedback mode
  glFinish()
Block until all GL execution is complete
  glFlush()
Force Execution of GL commands in finite time
  glFog(pname, param)
glFogf, glFogi, glFogfv, glFogiv
  glFrontFace(mode)
Define front- and back-facing polygons
  glFrustum(left, right, bottom, top, zNear, zFar)
Multiply the current matrix by a perspective matrix
  glGenLists(range)
Generate a contiguous set of empty display lists
  glGenTextures(n, textures)
Generate texture names
  glGet(pname, param)
glGetBooleanv, glGetfloatv, glGetFloatv, glGetIntegerv
  glGetClipPlane(plane, equation)
Return the coefficients of the specified clipping plane
  glGetError()
Return error information
  glGetLight(light, pname, params)
glGetLightfv and glGetLightiv
  glGetMap(target, query, v)
glGetMapdv, glGetMapfv, glGetMapiv
  glGetMaterial(face, pname, params)
glGetMaterialfv, glGetMaterialiv
  glGetPixelMap(map, values)
glGetPixelMapfv, glGetPixelMapuiv, glGetPixelMapusv
  glGetPolygonStipple(mask)
Return the polygon stipple pattern
  glGetString(name)
Return a strin describing the current GL connection
  glGetTexEnv(target, pname, params)
glGetTexEnvfv, glGetTexEnviv
  glGetTexGen(coord, pname, params)
glGetTexGendv, glGetTexGenfv, glGetTexGeniv
  glGetTexImage(target, level, format, type, pixels)
Return a texture image
  glGetTexLevelParameter(target, level, pname, params)
glGetTexLevelParameterfv, glGetTexLevelParameteriv
  glGetTexParameter(target, pname, params)
glGetTexParameterfv, glGetTexParameteriv
  glHint(target, mode)
Specify implementation-specific hints
  glIndex(c)
glIndexd, glIndexf, glIndexi, glIndexs, glIndexdv, glIndexfv, glIndexiv, glIndexsv
  glInitNames()
Initialize the name stack
  glIsEnabled(cap)
Test whether a capability is enabled
  glIsList(list)
Determine if a name corresponds to a display-list
  glIsTexture(texture)
Determine if a name corresponds to a texture
  glLight(light, pname, param)
glLightf,glLighti, glLightfv, glLightiv
  glLightModel(pname, param)
glLightModelf, glLightModeli, glLightModelfv, glLightModeliv
  glLineStipple(factor, pattern)
Specify the line stipple pattern
  glLineWidth(width)
Specify the width of rasterized lines.
  glListBase(base)
Set the display-list base for glCallLists
  glLoadIdentity()
Replace the current matrix with the identity matrix
  glLoadMatrix(m)
glLoadMatrixd, glLoadMatixf
  glLoadName(name)
Load a name onto the name stack.
  glLogicOp(opcode)
Specify a logical pixel operation for color index rendering
  glMap1(target, u1, u2, stride, order, points)
glMap1d, glMap1f
  glMap2(target, u1, u2, ustride, uorder, v1, v2, vstride, vorder, points)
glMap2d, glMap2f
  glMapGrid(un, u1, u2, vn, v1, v2)
glMapGrid1d, glMapGrid1f, glMapGrid2d, glMapGrid2f
  glMaterial(face, pname, params)
Specify material parameters for the lighting model.
  glMatrixMode(mode)
Specify which matrix is the current matrix.
  glMultMatrix(m)
glMultMatrixd, glMultMatrixf
  glNewList(list, mode)
Create or replace a display list
  glNormal3(nx, ny, nz, v)
Normal3b, Normal3bv, Normal3d, Normal3dv, Normal3f, Normal3fv, Normal3i, Normal3iv, Normal3s, Normal3sv
  glOrtho(left, right, bottom, top, zNear, zFar)
Multiply the current matrix with an orthographic matrix
  glPassThrough(token)
Place a marker in the feedback buffer
  glPixelMap(map, mapsize, values)
glPixelMapfv, glPixelMapuiv, glPixelMapusv
  glPixelStore(pname, param)
glPixelStoref, glPixelStorei
  glPixelTransfer(pname, param)
glPixelTransferf, glPixelTransferi
  glPixelZoom(xfactor, yfactor)
Specify the pixel zoom factors
  glPointSize(size)
Specify the diameter of rasterized points
  glPolygonMode(face, mode)
Select a polygon rasterization mode
  glPolygonOffset(factor, units)
Set the scale and units used to calculate depth values
  glPolygonStipple(mask)
Set the polygon stippling pattern
  glPopAttrib()
Pop the server attribute stack
  glPopMatrix()
Pop the current matrix stack
  glPopName()
Pop the name stack
  glPrioritizeTextures(n, textures, priorities)
Set texture residence priority
  glPushAttrib(mask)
Push the server attribute stack
  glPushMatrix()
Push the current matrix stack
  glPushName(name)
Push the name stack
  glRasterPos(x, y, z, w)
glRasterPos2d, glRasterPos2f, glRasterPos2i, glRasterPos2s, glRasterPos3d, glRasterPos3f, glRasterPos3i, glRasterPos3s, glRasterPos4d, glRasterPos4f, glRasterPos4i, glRasterPos4s, glRasterPos2dv, glRasterPos2fv, glRasterPos2iv, glRasterPos2sv, glRasterPos3dv, glRasterPos3fv, glRasterPos3iv, glRasterPos3sv, glRasterPos4dv, glRasterPos4fv, glRasterPos4iv, glRasterPos4sv
  glReadBuffer(mode)
Select a color buffer source for pixels.
  glReadPixels(x, y, width, height, format, type, pixels)
Read a block of pixels from the frame buffer
  glRect(x1, y1, x2, y2, v1, v2)
glRectd, glRectf, glRecti, glRects, glRectdv, glRectfv, glRectiv, glRectsv
  glRenderMode(mode)
Set rasterization mode
  glRotate(angle, x, y, z)
glRotated, glRotatef
  glScale(x, y, z)
glScaled, glScalef
  glScissor(x, y, width, height)
Define the scissor box
  glSelectBuffer(size, buffer)
Establish a buffer for selection mode values
  glShadeModel(mode)
Select flat or smooth shading
  glStencilFuc(func, ref, mask)
Set function and reference value for stencil testing
  glStencilMask(mask)
Control the writing of individual bits in the stencil planes
  glStencilOp(fail, zfail, zpass)
Set stencil test actions
  glTexCoord(s, t, r, q, v)
glTexCoord1d, glTexCoord1f, glTexCoord1i, glTexCoord1s, glTexCoord2d, glTexCoord2f, glTexCoord2i, glTexCoord2s, glTexCoord3d, glTexCoord3f, glTexCoord3i, glTexCoord3s, glTexCoord4d, glTexCoord4f, glTexCoord4i, glTexCoord4s, glTexCoord1dv, glTexCoord1fv, glTexCoord1iv, glTexCoord1sv, glTexCoord2dv, glTexCoord2fv, glTexCoord2iv, glTexCoord2sv, glTexCoord3dv, glTexCoord3fv, glTexCoord3iv, glTexCoord3sv, glTexCoord4dv, glTexCoord4fv, glTexCoord4iv, glTexCoord4sv
  glTexEnv(target, pname, param)
glTextEnvf, glTextEnvi, glTextEnvfv, glTextEnviv
  glTexGen(coord, pname, param)
glTexGend, glTexGenf, glTexGeni, glTexGendv, glTexGenfv, glTexGeniv
  glTexImage1D(target, level, internalformat, width, border, format, type, pixels)
Specify a one-dimensional texture image
  glTexImage2D(target, level, internalformat, width, height, border, format, type, pixels)
Specify a two-dimensional texture image
  glTexParameter(target, pname, param)
glTexParameterf, glTexParameteri, glTexParameterfv, glTexParameteriv
  glTranslate(x, y, z)
glTranslatef, glTranslated
  gluLookAt(eyex, eyey, eyez, centerx, centery, centerz, upx, upy, upz)
Define a viewing transformation
  gluOrtho2D(left, right, bottom, top)
Define a 2-D orthographic projection matrix
  gluPerspective(fovY, aspect, zNear, zFar)
Set up a perspective projection matrix.
  gluPickMatrix(x, y, width, height, viewport)
Define a picking region
  gluProject(objx, objy, objz, modelMatrix, projMatrix, viewport, winx, winy, winz)
Map object coordinates to window coordinates.
  gluUnProject(winx, winy, winz, modelMatrix, projMatrix, viewport, objx, objy, objz)
Map object coordinates to window coordinates.
  glVertex(x, y, z, w, v)
glVertex2d, glVertex2f, glVertex2i, glVertex2s, glVertex3d, glVertex3f, glVertex3i, glVertex3s, glVertex4d, glVertex4f, glVertex4i, glVertex4s, glVertex2dv, glVertex2fv, glVertex2iv, glVertex2sv, glVertex3dv, glVertex3fv, glVertex3iv, glVertex3sv, glVertex4dv, glVertex4fv, glVertex4iv, glVertex4sv
  glViewport(x, y, width, height)
Set the viewport

Function Details

glAccum(op, value)

Operate on the accumulation buffer
Parameters:
op - The accumulation buffer operation.
           (type=Enumerated constant)
value - a value used in the accumulation buffer operation.
           (type=float)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/accum.html

glAlphaFunc(func, ref)

Specify the alpha test function
Parameters:
func - Specifies the alpha comparison function.
           (type=Enumerated constant)
ref - The reference value that incoming alpha values are compared to. Clamped between 0 and 1.
           (type=float)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/alphafunc.html

glAreTexturesResident(n, textures, residences)

Determine if textures are loaded in texture memory
Parameters:
n - Specifies the number of textures to be queried.
           (type=int)
textures - Specifies an array containing the names of the textures to be queried
           (type=Buffer object type GL_INT)
residences - An array in which the texture residence status in returned.The residence status of a texture named by an element of textures is returned in the corresponding element of residences.
           (type=Buffer object type GL_INT(boolean))

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/aretexturesresident.html

glBegin(mode)

Delimit the vertices of a primitive or a group of like primatives
Parameters:
mode - Specifies the primitive that will be create from vertices between glBegin and glEnd.
           (type=Enumerated constant)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/begin.html

glBindTexture(target, texture)

Bind a named texture to a textureing target
Parameters:
target - Specifies the target to which the texture is bound.
           (type=Enumerated constant)
texture - Specifies the name of a texture.
           (type=unsigned int)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/bindtexture.html

glBitmap(width, height, xorig, yorig, xmove, ymove, bitmap)

Draw a bitmap
Parameters:
width, height - Specify the pixel width and height of the bitmap image.
           (type of width=int)
           (type of height=int)
xorig, yorig - Specify the location of the origin in the bitmap image. The origin is measured from the lower left corner of the bitmap, with right and up beigng the positive axes.
           (type of xorig=float)
           (type of yorig=float)
xmove, ymove - Specify the x and y offsets to be added to the current raster position after the bitmap is drawn.
           (type of xmove=float)
           (type of ymove=float)
bitmap - Specifies the address of the bitmap image.
           (type=Buffer object type GL_BYTE)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/bitmap.html

glBlendFunc(sfactor, dfactor)

Specify pixel arithmetic
Parameters:
sfactor - Specifies how the red, green, blue, and alpha source blending factors are computed.
           (type=Enumerated constant)
dfactor - Specifies how the red, green, blue, and alpha destination blending factors are computed.
           (type=Enumerated constant)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/blendfunc.html

glCallList(list)

Execute a display list
Parameters:
list - Specifies the integer name of the display list to be executed.
           (type=unsigned int)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/calllist.html

glCallLists(n, type, lists)

Execute a list of display lists
Parameters:
n - Specifies the number of display lists to be executed.
           (type=int)
type - Specifies the type of values in lists.
           (type=Enumerated constant)
lists - Specifies the address of an array of name offsets in the display list. The pointer type is void because the offsets can be bytes, shorts, ints, or floats, depending on the value of type.
           (type=Buffer object)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/calllists.html

glClear(mask)

Clear buffers to preset values
Parameters:
mask - Bitwise OR of masks that indicate the buffers to be cleared.
           (type=Enumerated constant(s))

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/clear.html

glClearAccum(red, green, blue, alpha)

Specify clear values for the accumulation buffer
Parameters:
red, green, blue, alpha - Specify the red, green, blue, and alpha values used when the accumulation buffer is cleared. The initial values are all 0.
           (type of red=float)
           (type of green=float)
           (type of blue=float)
           (type of alpha=float)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/clearaccum.html

glClearColor(red, green, blue, alpha)

Specify clear values for the color buffers
Parameters:
red, green, blue, alpha - Specify the red, green, blue, and alpha values used when the color buffers are cleared. The initial values are all 0.
           (type of red=float)
           (type of green=float)
           (type of blue=float)
           (type of alpha=float)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/clearcolor.html

glClearDepth(depth)

Specify the clear value for the depth buffer
Parameters:
depth - Specifies the depth value used when the depth buffer is cleared. The initial value is 1.
           (type=int)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/cleardepth.html

glClearIndex(c)

Specify the clear value for the color index buffers
Parameters:
c - Specifies the index used when the color index buffers are cleared. The initial value is 0.
           (type=float)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/clearindex.html

glClearStencil(s)

Specify the clear value for the stencil buffer
Parameters:
s - Specifies the index used when the stencil buffer is cleared. The initial value is 0.
           (type=int)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/clearstencil.html

glClipPlane(plane, equation)

Specify a plane against which all geometery is clipped
Parameters:
plane - Specifies which clipping plane is being positioned.
           (type=Enumerated constant)
equation - Specifies the address of an array of four double- precision floating-point values. These values are interpreted as a plane equation.
           (type=Buffer object type GL_FLOAT(double))

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/clipplane.html

glColor(red, green, blue, alpha)

glColor3b, glColor3d, glColor3f, glColor3i, glColor3s, glColor3ub, glColor3ui, glColor3us, glColor4b, glColor4d, glColor4f, glColor4i, glColor4s, glColor4ub, glColor4ui, glColor4us, glColor3bv, glColor3dv, glColor3fv, glColor3iv, glColor3sv, glColor3ubv, glColor3uiv, glColor3usv, glColor4bv, glColor4dv, glColor4fv, glColor4iv, glColor4sv, glColor4ubv, glColor4uiv, glColor4usv

Set a new color.
Parameters:
red, green, blue - Specify new red, green, and blue values for the current color.
           (type of red=Depends on function prototype.)
           (type of green=Depends on function prototype.)
           (type of blue=Depends on function prototype.)
alpha - Specifies a new alpha value for the current color. Included only in the four-argument glColor4 commands. (With '4' colors only)
           (type=Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/color.html

glColorMask(red, green, blue, alpha)

Enable and disable writing of frame buffer color components
Parameters:
red, green, blue, alpha - Specify whether red, green, blue, and alpha can or cannot be written into the frame buffer. The initial values are all GL_TRUE, indicating that the color components can be written.
           (type of red=int (boolean))
           (type of green=int (boolean))
           (type of blue=int (boolean))
           (type of alpha=int (boolean))

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/colormask.html

glColorMaterial(face, mode)

Cause a material color to track the current color
Parameters:
face - Specifies whether front, back, or both front and back material parameters should track the current color.
           (type=Enumerated constant)
mode - Specifies which of several material parameters track the current color.
           (type=Enumerated constant)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/colormaterial.html

glCopyPixels(x, y, width, height, type)

Copy pixels in the frame buffer
Parameters:
x, y - Specify the window coordinates of the lower left corner of the rectangular region of pixels to be copied.
           (type of x=int)
           (type of y=int)
width, height - Specify the dimensions of the rectangular region of pixels to be copied. Both must be non-negative.
           (type of width=int)
           (type of height=int)
type - Specifies whether color values, depth values, or stencil values are to be copied.
           (type=Enumerated constant)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/copypixels.html

glCullFace(mode)

Specify whether front- or back-facing facets can be culled
Parameters:
mode - Specifies whether front- or back-facing facets are candidates for culling.
           (type=Enumerated constant)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/cullface.html

glDeleteLists(list, range)

Delete a contiguous group of display lists
Parameters:
list - Specifiex the integer name of the first display list to delete
           (type=unsigned int)
range - Specifies the number of display lists to delete
           (type=int)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/deletelists.html

glDeleteTextures(n, textures)

Delete named textures
Parameters:
n - Specifes the number of textures to be deleted
           (type=int)
textures - Specifies an array of textures to be deleted
           (type=Buffer GL_INT)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/deletetextures.html

glDepthFunc(func)

Specify the value used for depth buffer comparisons
Parameters:
func - Specifies the depth comparison function.
           (type=Enumerated constant)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/depthfunc.html

glDepthMask(flag)

Enable or disable writing into the depth buffer
Parameters:
flag - Specifies whether the depth buffer is enabled for writing. If flag is GL_FALSE, depth buffer writing is disabled. Otherwise, it is enabled. Initially, depth buffer writing is enabled.
           (type=int (boolean))

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/depthmask.html

glDepthRange(zNear, zFar)

Specify mapping of depth values from normalized device coordinates to window coordinates
Parameters:
zNear - Specifies the mapping of the near clipping plane to window coordinates. The initial value is 0.
           (type=int)
zFar - Specifies the mapping of the far clipping plane to window coordinates. The initial value is 1.
           (type=int)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/depthrange.html

glDisable(cap)

Disable server-side GL capabilities
Parameters:
cap - Specifies a symbolic constant indicating a GL capability.
           (type=Enumerated constant)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/enable.html

glDrawBuffer(mode)

Specify which color buffers are to be drawn into
Parameters:
mode - Specifies up to four color buffers to be drawn into.
           (type=Enumerated constant)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/drawbuffer.html

glDrawPixels(width, height, format, type, pixels)

Write a block of pixels to the frame buffer
Parameters:
width, height - Specify the dimensions of the pixel rectangle to be written into the frame buffer.
           (type of width=int)
           (type of height=int)
format - Specifies the format of the pixel data.
           (type=Enumerated constant)
type - Specifies the data type for pixels.
           (type=Enumerated constant)
pixels - Specifies a pointer to the pixel data.
           (type=Buffer object)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/drawpixels.html

glEdgeFlag(flag)

glEdgeFlag, glEdgeFlagv

Flag edges as either boundary or nonboundary
Parameters:
flag - Specifies the current edge flag value.The initial value is GL_TRUE.
           (type=Depends of function prototype)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/edgeflag.html

glEnable(cap)

Enable server-side GL capabilities
Parameters:
cap - Specifies a symbolic constant indicating a GL capability.
           (type=Enumerated constant)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/enable.html

glEnd()

Delimit the vertices of a primitive or group of like primitives

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/begin.html

glEndList()

Create or replace a display list

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/newlist.html

glEvalCoord(u, v)

glEvalCoord1d, glEvalCoord1f, glEvalCoord2d, glEvalCoord2f, glEvalCoord1dv, glEvalCoord1fv, glEvalCoord2dv, glEvalCoord2fv

Evaluate enabled one- and two-dimensional maps
Parameters:
u - Specifies a value that is the domain coordinate u to the basis function defined in a previous glMap1 or glMap2 command. If the function prototype ends in 'v' then u specifies a pointer to an array containing either one or two domain coordinates. The first coordinate is u. The second coordinate is v, which is present only in glEvalCoord2 versions.
           (type=Depends on function prototype.)
v - Specifies a value that is the domain coordinate v to the basis function defined in a previous glMap2 command. This argument is not present in a glEvalCoord1 command.
           (type=Depends on function prototype. (only with '2' prototypes))

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/evalcoord.html

glEvalMesh(mode, i1, i2)

glEvalMesh1 or glEvalMesh2

Compute a one- or two-dimensional grid of points or lines
Parameters:
mode - In glEvalMesh1, specifies whether to compute a one-dimensional mesh of points or lines.
           (type=Enumerated constant)
i1, i2 - Specify the first and last integer values for the grid domain variable i.
           (type of i1=int)
           (type of i2=int)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/evalmesh.html

glEvalPoint(i, j)

glEvalPoint1 and glEvalPoint2

Generate and evaluate a single point in a mesh
Parameters:
i - Specifies the integer value for grid domain variable i.
           (type=int)
j - Specifies the integer value for grid domain variable j (glEvalPoint2 only).
           (type=int (only with '2' prototypes))

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/evalpoint.html

glFeedbackBuffer(size, type, buffer)

Controls feedback mode
Parameters:
size
           (type=int @param size:Specifies the maximum number of values that can be written into buffer.)
type
           (type=Enumerated constant @param type:Specifies a symbolic constant that describes the information that will be returned for each vertex.)
buffer - Returns the feedback data.
           (type=Buffer object GL_FLOAT)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/feedbackbuffer.html

glFinish()

Block until all GL execution is complete

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/finish.html

glFlush()

Force Execution of GL commands in finite time

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/flush.html

glFog(pname, param)

glFogf, glFogi, glFogfv, glFogiv

Specify fog parameters
Parameters:
pname - Specifies a single-valued fog parameter. If the function prototype ends in 'v' specifies a fog parameter.
           (type=Enumerated constant)
param - Specifies the value or values to be assigned to pname. GL_FOG_COLOR requires an array of four values. All other parameters accept an array containing only a single value.
           (type=Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/fog.html

glFrontFace(mode)

Define front- and back-facing polygons
Parameters:
mode - Specifies the orientation of front-facing polygons.
           (type=Enumerated constant)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/frontface.html

glFrustum(left, right, bottom, top, zNear, zFar)

Multiply the current matrix by a perspective matrix
Parameters:
left, right - Specify the coordinates for the left and right vertical clipping planes.
           (type of left=double (float))
           (type of right=double (float))
bottom, top - Specify the coordinates for the bottom and top horizontal clipping planes.
           (type of bottom=double (float))
           (type of top=double (float))
zNear, zFar - Specify the distances to the near and far depth clipping planes. Both distances must be positive.
           (type of zNear=double (float))
           (type of zFar=double (float))

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/frustum.html

glGenLists(range)

Generate a contiguous set of empty display lists
Parameters:
range - Specifies the number of contiguous empty display lists to be generated.
           (type=int)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/genlists.html

glGenTextures(n, textures)

Generate texture names
Parameters:
n - Specifies the number of textures name to be generated.
           (type=int)
textures - Specifies an array in which the generated textures names are stored.
           (type=Buffer object type GL_INT)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/gentextures.html

glGet(pname, param)

glGetBooleanv, glGetfloatv, glGetFloatv, glGetIntegerv

Return the value or values of a selected parameter
Parameters:
pname - Specifies the parameter value to be returned.
           (type=Enumerated constant)
param - Returns the value or values of the specified parameter.
           (type=Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/get.html

glGetClipPlane(plane, equation)

Return the coefficients of the specified clipping plane
Parameters:
plane - Specifies a clipping plane. The number of clipping planes depends on the implementation, but at least six clipping planes are supported. They are identified by symbolic names of the form GL_CLIP_PLANEi where 0 < i < GL_MAX_CLIP_PLANES.
           (type=Enumerated constant)
equation - Returns four float (double)-precision values that are the coefficients of the plane equation of plane in eye coordinates. The initial value is (0, 0, 0, 0).
           (type=Buffer object type GL_FLOAT)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/getclipplane.html

glGetError()

Return error information

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/geterror.html

glGetLight(light, pname, params)

glGetLightfv and glGetLightiv

Return light source parameter values
Parameters:
light - Specifies a light source. The number of possible lights depends on the implementation, but at least eight lights are supported. They are identified by symbolic names of the form GL_LIGHTi where 0 < i < GL_MAX_LIGHTS.
           (type=Enumerated constant)
pname - Specifies a light source parameter for light.
           (type=Enumerated constant)
params - Returns the requested data.
           (type=Buffer object. Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/getlight.html

glGetMap(target, query, v)

glGetMapdv, glGetMapfv, glGetMapiv

Return evaluator parameters
Parameters:
target - Specifies the symbolic name of a map.
           (type=Enumerated constant)
query - Specifies which parameter to return.
           (type=Enumerated constant)
v - Returns the requested data.
           (type=Buffer object. Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/getmap.html

glGetMaterial(face, pname, params)

glGetMaterialfv, glGetMaterialiv

Return material parameters
Parameters:
face - Specifies which of the two materials is being queried. representing the front and back materials, respectively.
           (type=Enumerated constant)
pname - Specifies the material parameter to return.
           (type=Enumerated constant)
params - Returns the requested data.
           (type=Buffer object. Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/getmaterial.html

glGetPixelMap(map, values)

glGetPixelMapfv, glGetPixelMapuiv, glGetPixelMapusv

Return the specified pixel map
Parameters:
map - Specifies the name of the pixel map to return.
           (type=Enumerated constant)
values - Returns the pixel map contents.
           (type=Buffer object. Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/getpixelmap.html

glGetPolygonStipple(mask)

Return the polygon stipple pattern
Parameters:
mask - Returns the stipple pattern. The initial value is all 1's.
           (type=Buffer object type GL_BYTE)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/getpolygonstipple.html

glGetString(name)

Return a strin describing the current GL connection
Parameters:
name - Specifies a symbolic constant.
           (type=Enumerated constant)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/getstring.html

glGetTexEnv(target, pname, params)

glGetTexEnvfv, glGetTexEnviv

Return texture environment parameters
Parameters:
target - Specifies a texture environment. Must be GL_TEXTURE_ENV.
           (type=Enumerated constant)
pname - Specifies the symbolic name of a texture environment parameter.
           (type=Enumerated constant)
params - Returns the requested data.
           (type=Buffer object. Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/gettexenv.html

glGetTexGen(coord, pname, params)

glGetTexGendv, glGetTexGenfv, glGetTexGeniv

Return texture coordinate generation parameters
Parameters:
coord - Specifies a texture coordinate.
           (type=Enumerated constant)
pname - Specifies the symbolic name of the value(s) to be returned.
           (type=Enumerated constant)
params - Returns the requested data.
           (type=Buffer object. Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/gettexgen.html

glGetTexImage(target, level, format, type, pixels)

Return a texture image
Parameters:
target - Specifies which texture is to be obtained.
           (type=Enumerated constant)
level - Specifies the level-of-detail number of the desired image. Level 0 is the base image level. Level n is the nth mipmap reduction image.
           (type=int)
format - Specifies a pixel format for the returned data.
           (type=Enumerated constant)
type - Specifies a pixel type for the returned data.
           (type=Enumerated constant)
pixels - Returns the texture image. Should be a pointer to an array of the type specified by type
           (type=Buffer object.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/getteximage.html

glGetTexLevelParameter(target, level, pname, params)

glGetTexLevelParameterfv, glGetTexLevelParameteriv

return texture parameter values for a specific level of detail
Parameters:
target - Specifies the symbolic name of the target texture.
           (type=Enumerated constant)
level - Specifies the level-of-detail number of the desired image. Level 0 is the base image level. Level n is the nth mipmap reduction image.
           (type=int)
pname - Specifies the symbolic name of a texture parameter.
           (type=Enumerated constant)
params - Returns the requested data.
           (type=Buffer object. Depends on function prototype.)

See Also: opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/gettexlevelparameter.html

glGetTexParameter(target, pname, params)

glGetTexParameterfv, glGetTexParameteriv

Return texture parameter values
Parameters:
target - Specifies the symbolic name of the target texture.
           (type=Enumerated constant)
pname - Specifies the symbolic name the target texture.
           (type=Enumerated constant)
params - Returns the texture parameters.
           (type=Buffer object. Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/gettexparameter.html

glHint(target, mode)

Specify implementation-specific hints
Parameters:
target - Specifies a symbolic constant indicating the behavior to be controlled.
           (type=Enumerated constant)
mode - Specifies a symbolic constant indicating the desired behavior.
           (type=Enumerated constant)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/hint.html

glIndex(c)

glIndexd, glIndexf, glIndexi, glIndexs, glIndexdv, glIndexfv, glIndexiv, glIndexsv

Set the current color index
Parameters:
c - Specifies a pointer to a one element array that contains the new value for the current color index.
           (type=Buffer object. Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/index_.html

glInitNames()

Initialize the name stack

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/initnames.html

glIsEnabled(cap)

Test whether a capability is enabled
Parameters:
cap - Specifies a constant representing a GL capability.
           (type=Enumerated constant)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/isenabled.html

glIsList(list)

Determine if a name corresponds to a display-list
Parameters:
list - Specifies a potential display-list name.
           (type=unsigned int)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/islist.html

glIsTexture(texture)

Determine if a name corresponds to a texture
Parameters:
texture - Specifies a value that may be the name of a texture.
           (type=unsigned int)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/istexture.html

glLight(light, pname, param)

glLightf,glLighti, glLightfv, glLightiv

Set the light source parameters
Parameters:
light - Specifies a light. The number of lights depends on the implementation, but at least eight lights are supported. They are identified by symbolic names of the form GL_LIGHTi where 0 < i < GL_MAX_LIGHTS.
           (type=Enumerated constant)
pname - Specifies a single-valued light source parameter for light.
           (type=Enumerated constant)
param - Specifies the value that parameter pname of light source light will be set to. If function prototype ends in 'v' specifies a pointer to the value or values that parameter pname of light source light will be set to.
           (type=Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/light.html

glLightModel(pname, param)

glLightModelf, glLightModeli, glLightModelfv, glLightModeliv

Set the lighting model parameters
Parameters:
pname - Specifies a single-value light model parameter.
           (type=Enumerated constant)
param - Specifies the value that param will be set to. If function prototype ends in 'v' specifies a pointer to the value or values that param will be set to.
           (type=Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/lightmodel.html

glLineStipple(factor, pattern)

Specify the line stipple pattern
Parameters:
factor - Specifies a multiplier for each bit in the line stipple pattern. If factor is 3, for example, each bit in the pattern is used three times before the next bit in the pattern is used. factor is clamped to the range [1, 256] and defaults to 1.
           (type=int)
pattern - Specifies a 16-bit integer whose bit pattern determines which fragments of a line will be drawn when the line is rasterized. Bit zero is used first; the default pattern is all 1's.
           (type=unsigned short int)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/linestipple.html

glLineWidth(width)

Specify the width of rasterized lines.
Parameters:
width - Specifies the width of rasterized lines. The initial value is 1.
           (type=float)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/linewidth.html

glListBase(base)

Set the display-list base for glCallLists
Parameters:
base - Specifies an integer offset that will be added to glCallLists offsets to generate display-list names. The initial value is 0.
           (type=unsigned int)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/listbase.html

glLoadIdentity()

Replace the current matrix with the identity matrix

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/loadidentity.html

glLoadMatrix(m)

glLoadMatrixd, glLoadMatixf

Replace the current matrix with the specified matrix
Parameters:
m - Specifies a pointer to 16 consecutive values, which are used as the elements of a 4x4 column-major matrix.
           (type=Buffer object. Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/loadmatrix.html

glLoadName(name)

Load a name onto the name stack.
Parameters:
name - Specifies a name that will replace the top value on the name stack.
           (type=unsigned int)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/loadname.html

glLogicOp(opcode)

Specify a logical pixel operation for color index rendering
Parameters:
opcode - Specifies a symbolic constant that selects a logical operation.
           (type=Enumerated constant)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/logicop.html

glMap1(target, u1, u2, stride, order, points)

glMap1d, glMap1f

Define a one-dimensional evaluator
Parameters:
target - Specifies the kind of values that are generated by the evaluator.
           (type=Enumerated constant)
u1, u2 - Specify a linear mapping of u, as presented to glEvalCoord1, to ^, t he variable that is evaluated by the equations specified by this command.
           (type of u1=Depends on function prototype.)
           (type of u2=Depends on function prototype.)
stride - Specifies the number of floats or float (double)s between the beginning of one control point and the beginning of the next one in the data structure referenced in points. This allows control points to be embedded in arbitrary data structures. The only constraint is that the values for a particular control point must occupy contiguous memory locations.
           (type=int)
order - Specifies the number of control points. Must be positive.
           (type=int)
points - Specifies a pointer to the array of control points.
           (type=Buffer object. Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/map1.html

glMap2(target, u1, u2, ustride, uorder, v1, v2, vstride, vorder, points)

glMap2d, glMap2f

Define a two-dimensional evaluator
Parameters:
target - Specifies the kind of values that are generated by the evaluator.
           (type=Enumerated constant)
u1, u2 - Specify a linear mapping of u, as presented to glEvalCoord2, to ^, t he variable that is evaluated by the equations specified by this command. Initally u1 is 0 and u2 is 1.
           (type of u1=Depends on function prototype.)
           (type of u2=Depends on function prototype.)
ustride - Specifies the number of floats or float (double)s between the beginning of control point R and the beginning of control point R ij, where i and j are the u and v control pointiindices, respectively. This allows control points to be embedded in arbitrary data structures. The only constraint is that the values for a particular control point must occupy contiguous memory locations. The initial value of ustride is 0.
           (type=int)
uorder - Specifies the dimension of the control point array in the u axis. Must be positive. The initial value is 1.
           (type=int)
v1, v2 - Specify a linear mapping of v, as presented to glEvalCoord2, to ^, one of the two variables that are evaluated by the equations specified by this command. Initially, v1 is 0 and v2 is 1.
           (type of v1=Depends on function prototype.)
           (type of v2=Depends on function prototype.)
vstride - Specifies the number of floats or float (double)s between the beginning of control point R and the beginning of control point R ij, where i and j are the u and v control point(indices, respectively. This allows control points to be embedded in arbitrary data structures. The only constraint is that the values for a particular control point must occupy contiguous memory locations. The initial value of vstride is 0.
           (type=int)
vorder - Specifies the dimension of the control point array in the v axis. Must be positive. The initial value is 1.
           (type=int)
points - Specifies a pointer to the array of control points.
           (type=Buffer object. Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/map2.html

glMapGrid(un, u1, u2, vn, v1, v2)

glMapGrid1d, glMapGrid1f, glMapGrid2d, glMapGrid2f

Define a one- or two-dimensional mesh
Parameters:
un - Specifies the number of partitions in the grid range interval [u1, u2]. Must be positive.
           (type=int)
u1, u2 - Specify the mappings for integer grid domain values i=0 and i=un.
           (type of u1=Depends on function prototype.)
           (type of u2=Depends on function prototype.)
vn - Specifies the number of partitions in the grid range interval [v1, v2] (glMapGrid2 only).
           (type=int)
v1, v2 - Specify the mappings for integer grid domain values j=0 and j=vn (glMapGrid2 only).
           (type of v1=Depends on function prototype.)
           (type of v2=Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/mapgrid.html

glMaterial(face, pname, params)

Specify material parameters for the lighting model.
Parameters:
face - Specifies which face or faces are being updated. Must be one of:
           (type=Enumerated constant)
pname - Specifies the single-valued material parameter of the face or faces that is being updated. Must be GL_SHININESS.
           (type=Enumerated constant)
params - Specifies the value that parameter GL_SHININESS will be set to. If function prototype ends in 'v' specifies a pointer to the value or values that pname will be set to.
           (type=int)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/material.html

glMatrixMode(mode)

Specify which matrix is the current matrix.
Parameters:
mode - Specifies which matrix stack is the target for subsequent matrix operations.
           (type=Enumerated constant)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/matrixmode.html

glMultMatrix(m)

glMultMatrixd, glMultMatrixf

Multiply the current matrix with the specified matrix
Parameters:
m - Points to 16 consecutive values that are used as the elements of a 4x4 column major matrix.
           (type=Buffer object. Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/multmatrix.html

glNewList(list, mode)

Create or replace a display list
Parameters:
list - Specifies the display list name
           (type=unsigned int)
mode - Specifies the compilation mode.
           (type=Enumerated constant)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/newlist.html

glNormal3(nx, ny, nz, v)

Normal3b, Normal3bv, Normal3d, Normal3dv, Normal3f, Normal3fv, Normal3i, Normal3iv, Normal3s, Normal3sv

Set the current normal vector
Parameters:
nx, ny, nz - Specify the x, y, and z coordinates of the new current normal. The initial value of the current normal is the unit vector, (0, 0, 1).
           (type of nx=Depends on function prototype. (non - 'v' prototypes only))
           (type of ny=Depends on function prototype. (non - 'v' prototypes only))
           (type of nz=Depends on function prototype. (non - 'v' prototypes only))
v - Specifies a pointer to an array of three elements: the x,y, and z coordinates of the new current normal.
           (type=Buffer object. Depends on function prototype. ('v' prototypes))

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/normal.html

glOrtho(left, right, bottom, top, zNear, zFar)

Multiply the current matrix with an orthographic matrix
Parameters:
left, right - Specify the coordinates for the left and right vertical clipping planes.
           (type of left=double (float))
           (type of right=double (float))
bottom, top - Specify the coordinates for the bottom and top horizontal clipping planes.
           (type of bottom=double (float))
           (type of top=double (float))
zNear, zFar - Specify the distances to the nearer and farther depth clipping planes. These values are negative if the plane is to be behind the viewer.
           (type of zNear=double (float))
           (type of zFar=double (float))

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/ortho.html

glPassThrough(token)

Place a marker in the feedback buffer
Parameters:
token - Specifies a marker value to be placed in the feedback buffer following a GL_PASS_THROUGH_TOKEN.
           (type=float)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/passthrough.html

glPixelMap(map, mapsize, values)

glPixelMapfv, glPixelMapuiv, glPixelMapusv

Set up pixel transfer maps
Parameters:
map - Specifies a symbolic map name.
           (type=Enumerated constant)
mapsize - Specifies the size of the map being defined.
           (type=int)
values - Specifies an array of mapsize values.
           (type=Buffer object. Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/pixelmap.html

glPixelStore(pname, param)

glPixelStoref, glPixelStorei

Set pixel storage modes
Parameters:
pname - Specifies the symbolic name of the parameter to be set. Six values affect the packing of pixel data into memory. Six more affect the unpacking of pixel data from memory.
           (type=Enumerated constant)
param - Specifies the value that pname is set to.
           (type=Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/pixelstore.html

glPixelTransfer(pname, param)

glPixelTransferf, glPixelTransferi

Set pixel transfer modes
Parameters:
pname - Specifies the symbolic name of the pixel transfer parameter to be set.
           (type=Enumerated constant)
param - Specifies the value that pname is set to.
           (type=Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/pixeltransfer.html

glPixelZoom(xfactor, yfactor)

Specify the pixel zoom factors
Parameters:
xfactor, yfactor - Specify the x and y zoom factors for pixel write operations.
           (type of xfactor=float)
           (type of yfactor=float)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/pixelzoom.html

glPointSize(size)

Specify the diameter of rasterized points
Parameters:
size - Specifies the diameter of rasterized points. The initial value is 1.
           (type=float)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/pointsize.html

glPolygonMode(face, mode)

Select a polygon rasterization mode
Parameters:
face - Specifies the polygons that mode applies to. Must be GL_FRONT for front-facing polygons, GL_BACK for back- facing polygons, or GL_FRONT_AND_BACK for front- and back-facing polygons.
           (type=Enumerated constant)
mode - Specifies how polygons will be rasterized. The initial value is GL_FILL for both front- and back- facing polygons.
           (type=Enumerated constant)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/polygonmode.html

glPolygonOffset(factor, units)

Set the scale and units used to calculate depth values
Parameters:
factor - Specifies a scale factor that is used to create a variable depth offset for each polygon. The initial value is 0.
           (type=float)
units - Is multiplied by an implementation-specific value to create a constant depth offset. The initial value is 0.
           (type=float)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/polygonoffset.html

glPolygonStipple(mask)

Set the polygon stippling pattern
Parameters:
mask - Specifies a pointer to a 32x32 stipple pattern that will be unpacked from memory in the same way that glDrawPixels unpacks pixels.
           (type=Buffer object type GL_BYTE)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/polygonstipple.html

glPopAttrib()

Pop the server attribute stack

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/pushattrib.html

glPopMatrix()

Pop the current matrix stack

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/pushmatrix.html

glPopName()

Pop the name stack

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/pushname.html

glPrioritizeTextures(n, textures, priorities)

Set texture residence priority
Parameters:
n
           (type=int @param n:Specifies the number of textures to be prioritized.)
textures - Specifies an array containing the names of the textures to be prioritized.
           (type=Buffer type GL_INT)
priorities - Specifies an array containing the texture priorities. A priority given in an element of priorities applies to the texture named by the corresponding element of textures.
           (type=Buffer type GL_FLOAT)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/prioritizetextures.html

glPushAttrib(mask)

Push the server attribute stack
Parameters:
mask - Specifies a mask that indicates which attributes to save.
           (type=Enumerated constant(s))

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/pushattrib.html

glPushMatrix()

Push the current matrix stack

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/pushmatrix.html

glPushName(name)

Push the name stack
Parameters:
name - Specifies a name that will be pushed onto the name stack.
           (type=unsigned int)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/pushname.html

glRasterPos(x, y, z, w)

glRasterPos2d, glRasterPos2f, glRasterPos2i, glRasterPos2s, glRasterPos3d, glRasterPos3f, glRasterPos3i, glRasterPos3s, glRasterPos4d, glRasterPos4f, glRasterPos4i, glRasterPos4s, glRasterPos2dv, glRasterPos2fv, glRasterPos2iv, glRasterPos2sv, glRasterPos3dv, glRasterPos3fv, glRasterPos3iv, glRasterPos3sv, glRasterPos4dv, glRasterPos4fv, glRasterPos4iv, glRasterPos4sv

Specify the raster position for pixel operations
Parameters:
x, y, z, w - Specify the x,y,z, and w object coordinates (if present) for the raster position. If function prototype ends in 'v' specifies a pointer to an array of two, three, or four elements, specifying x, y, z, and w coordinates, respectively.
           (type of x=Depends on function prototype. (z and w for '3' and '4' prototypes only))
           (type of y=Depends on function prototype. (z and w for '3' and '4' prototypes only))
           (type of z=Depends on function prototype. (z and w for '3' and '4' prototypes only))
           (type of w=Depends on function prototype. (z and w for '3' and '4' prototypes only))

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/rasterpos.html

glReadBuffer(mode)

Select a color buffer source for pixels.
Parameters:
mode - Specifies a color buffer.
           (type=Enumerated constant)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/readbuffer.html

glReadPixels(x, y, width, height, format, type, pixels)

Read a block of pixels from the frame buffer
Parameters:
x
           (type=int @param x,y:Specify the window coordinates of the first pixel that is read from the frame buffer. This location is the lower left corner of a rectangular block of pixels.)
y
           (type=int @param x,y:Specify the window coordinates of the first pixel that is read from the frame buffer. This location is the lower left corner of a rectangular block of pixels.)
width, height - Specify the dimensions of the pixel rectangle. width and height of one correspond to a single pixel.
           (type of width=int)
           (type of height=int)
format - Specifies the format of the pixel data.
           (type=Enumerated constant)
type - Specifies the data type of the pixel data.
           (type=Enumerated constant)
pixels - Returns the pixel data.
           (type=Buffer object)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/readpixels.html

glRect(x1, y1, x2, y2, v1, v2)

glRectd, glRectf, glRecti, glRects, glRectdv, glRectfv, glRectiv, glRectsv

Draw a rectangle
Parameters:
x1, y1 - Specify one vertex of a rectangle
           (type of x1=Depends on function prototype. (for non 'v' prototypes only))
           (type of y1=Depends on function prototype. (for non 'v' prototypes only))
x2, y2 - Specify the opposite vertex of the rectangle
           (type of x2=Depends on function prototype. (for non 'v' prototypes only))
           (type of y2=Depends on function prototype. (for non 'v' prototypes only))
v1, v2 - Specifies a pointer to one vertex of a rectangle and the pointer to the opposite vertex of the rectangle
           (type of v1=Depends on function prototype. (for 'v' prototypes only))
           (type of v2=Depends on function prototype. (for 'v' prototypes only))

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/rect.html

glRenderMode(mode)

Set rasterization mode
Parameters:
mode - Specifies the rasterization mode.
           (type=Enumerated constant)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/rendermode.html

glRotate(angle, x, y, z)

glRotated, glRotatef

Multiply the current matrix by a rotation matrix
Parameters:
angle - Specifies the angle of rotation in degrees.
           (type=Depends on function prototype.)
x, y, z - Specify the x,y, and z coordinates of a vector respectively.
           (type of x=Depends on function prototype.)
           (type of y=Depends on function prototype.)
           (type of z=Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/rotate.html

glScale(x, y, z)

glScaled, glScalef

Multiply the current matrix by a general scaling matrix
Parameters:
x, y, z - Specify scale factors along the x,y, and z axes, respectively.
           (type of x=Depends on function prototype.)
           (type of y=Depends on function prototype.)
           (type of z=Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/scale.html

glScissor(x, y, width, height)

Define the scissor box
Parameters:
x, y - Specify the lower left corner of the scissor box. Initially (0, 0).
           (type of x=int)
           (type of y=int)
width, height - Specify the width and height of the scissor box. When a GL context is first attached to a window, width and height are set to the dimensions of that window.
           (type of width=int)
           (type of height=int)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/scissor.html

glSelectBuffer(size, buffer)

Establish a buffer for selection mode values
Parameters:
size - Specifies the size of buffer
           (type=int)
buffer - Returns the selection data
           (type=Buffer type GL_INT)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/selectbuffer.html

glShadeModel(mode)

Select flat or smooth shading
Parameters:
mode - Specifies a symbolic value representing a shading technique.
           (type=Enumerated constant)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/shademodel.html

glStencilFuc(func, ref, mask)

Set function and reference value for stencil testing
Parameters:
func
           (type=Enumerated constant @param func:Specifies the test function.)
ref
           (type=int @param ref:Specifies the reference value for the stencil test. ref is clamped to the range [0,2n-1], where n is the number of bitplanes in the stencil buffer. The initial value is 0.)
mask
           (type=unsigned int @param mask:Specifies a mask that is ANDed with both the reference value and the stored stencil value when the test is done. The initial value is all 1's.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/stencilfunc.html

glStencilMask(mask)

Control the writing of individual bits in the stencil planes
Parameters:
mask - Specifies a bit mask to enable and disable writing of individual bits in the stencil planes. Initially, the mask is all 1's.
           (type=unsigned int)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/stencilmask.html

glStencilOp(fail, zfail, zpass)

Set stencil test actions
Parameters:
fail - Specifies the action to take when the stencil test fails. The initial value is GL_KEEP.
           (type=Enumerated constant)
zfail - Specifies the stencil action when the stencil test passes, but the depth test fails. zfail accepts the same symbolic constants as fail. The initial value is GL_KEEP.
           (type=Enumerated constant)
zpass - Specifies the stencil action when both the stencil test and the depth test pass, or when the stencil test passes and either there is no depth buffer or depth testing is not enabled. zpass accepts the same symbolic constants as fail. The initial value is GL_KEEP.
           (type=Enumerated constant)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/stencilop.html

glTexCoord(s, t, r, q, v)

glTexCoord1d, glTexCoord1f, glTexCoord1i, glTexCoord1s, glTexCoord2d, glTexCoord2f, glTexCoord2i, glTexCoord2s, glTexCoord3d, glTexCoord3f, glTexCoord3i, glTexCoord3s, glTexCoord4d, glTexCoord4f, glTexCoord4i, glTexCoord4s, glTexCoord1dv, glTexCoord1fv, glTexCoord1iv, glTexCoord1sv, glTexCoord2dv, glTexCoord2fv, glTexCoord2iv, glTexCoord2sv, glTexCoord3dv, glTexCoord3fv, glTexCoord3iv, glTexCoord3sv, glTexCoord4dv, glTexCoord4fv, glTexCoord4iv, glTexCoord4sv

Set the current texture coordinates
Parameters:
s, t, r, q - Specify s, t, r, and q texture coordinates. Not all parameters are present in all forms of the command.
           (type of s=Depends on function prototype. (r and q for '3' and '4' prototypes only))
           (type of t=Depends on function prototype. (r and q for '3' and '4' prototypes only))
           (type of r=Depends on function prototype. (r and q for '3' and '4' prototypes only))
           (type of q=Depends on function prototype. (r and q for '3' and '4' prototypes only))
v - Specifies a pointer to an array of one, two, three, or four elements, which in turn specify the s, t, r, and q texture coordinates.
           (type=Buffer object. Depends on function prototype. (for 'v' prototypes only))

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/texcoord.html

glTexEnv(target, pname, param)

glTextEnvf, glTextEnvi, glTextEnvfv, glTextEnviv

Set texture environment parameters
Parameters:
target - Specifies a texture environment. Must be GL_TEXTURE_ENV.
           (type=Enumerated constant)
pname - Specifies the symbolic name of a single-valued texture environment parameter. Must be GL_TEXTURE_ENV_MODE.
           (type=Enumerated constant)
param - Specifies a single symbolic constant. If function prototype ends in 'v' specifies a pointer to a parameter array that contains either a single symbolic constant or an RGBA color
           (type=Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/texenv.html

glTexGen(coord, pname, param)

glTexGend, glTexGenf, glTexGeni, glTexGendv, glTexGenfv, glTexGeniv

Control the generation of texture coordinates
Parameters:
coord - Specifies a texture coordinate.
           (type=Enumerated constant)
pname - Specifies the symbolic name of the texture- coordinate generation function.
           (type=Enumerated constant)
param - Specifies a single-valued texture generation parameter. If function prototype ends in 'v' specifies a pointer to an array of texture generation parameters. If pname is GL_TEXTURE_GEN_MODE, then the array must contain a single symbolic constant. Otherwise, params holds the coefficients for the texture-coordinate generation function specified by pname.
           (type=Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/texgen.html

glTexImage1D(target, level, internalformat, width, border, format, type, pixels)

Specify a one-dimensional texture image
Parameters:
target - Specifies the target texture.
           (type=Enumerated constant)
level - Specifies the level-of-detail number. Level 0 is the base image level. Level n is the nth mipmap reduction image.
           (type=int)
internalformat - Specifies the number of color components in the texture.
           (type=int)
width - Specifies the width of the texture image. Must be 2n+2(border) for some integer n. All implementations support texture images that are at least 64 texels wide. The height of the 1D texture image is 1.
           (type=int)
border - Specifies the width of the border. Must be either 0 or 1.
           (type=int)
format - Specifies the format of the pixel data.
           (type=Enumerated constant)
type - Specifies the data type of the pixel data.
           (type=Enumerated constant)
pixels - Specifies a pointer to the image data in memory.
           (type=Buffer object.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/teximage1d.html

glTexImage2D(target, level, internalformat, width, height, border, format, type, pixels)

Specify a two-dimensional texture image
Parameters:
target - Specifies the target texture.
           (type=Enumerated constant)
level - Specifies the level-of-detail number. Level 0 is the base image level. Level n is the nth mipmap reduction image.
           (type=int)
internalformat - Specifies the number of color components in the texture.
           (type=int)
width - Specifies the width of the texture image. Must be 2n+2(border) for some integer n. All implementations support texture images that are at least 64 texels wide.
           (type=int)
height - Specifies the hieght of the texture image. Must be 2m+2(border) for some integer m. All implementations support texture images that are at least 64 texels high.
           (type=int)
border - Specifies the width of the border. Must be either 0 or 1.
           (type=int)
format - Specifies the format of the pixel data.
           (type=Enumerated constant)
type - Specifies the data type of the pixel data.
           (type=Enumerated constant)
pixels - Specifies a pointer to the image data in memory.
           (type=Buffer object.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/teximage2d.html

glTexParameter(target, pname, param)

glTexParameterf, glTexParameteri, glTexParameterfv, glTexParameteriv

Set texture parameters
Parameters:
target - Specifies the target texture.
           (type=Enumerated constant)
pname - Specifies the symbolic name of a single-valued texture parameter.
           (type=Enumerated constant)
param - Specifies the value of pname. If function prototype ends in 'v' specifies a pointer to an array where the value or values of pname are stored.
           (type=Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/texparameter.html

glTranslate(x, y, z)

glTranslatef, glTranslated

Multiply the current matrix by a translation matrix
Parameters:
x, y, z - Specify the x, y, and z coordinates of a translation vector.
           (type of x=Depends on function prototype.)
           (type of y=Depends on function prototype.)
           (type of z=Depends on function prototype.)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/translate.html

gluLookAt(eyex, eyey, eyez, centerx, centery, centerz, upx, upy, upz)

Define a viewing transformation
Parameters:
eyex, eyey, eyez - Specifies the position of the eye point.
           (type of eyex=double)
           (type of eyey=double)
           (type of eyez=double)
centerx, centery, centerz - Specifies the position of the reference point.
           (type of centerx=double)
           (type of centery=double)
           (type of centerz=double)
upx, upy, upz - Specifies the direction of the up vector.
           (type of upx=double)
           (type of upy=double)
           (type of upz=double)

See Also: http://www.parallab.uib.no/SGI_bookshelves/SGI_Developer/books/OpenGL_RM/sgi_html/ch06.html#id5552781

gluOrtho2D(left, right, bottom, top)

Define a 2-D orthographic projection matrix
Parameters:
left, right - Specify the coordinates for the left and right vertical clipping planes.
           (type of left=double)
           (type of right=double)
bottom, top - Specify the coordinates for the bottom and top horizontal clipping planes.
           (type of bottom=double)
           (type of top=double)

See Also: http://www.parallab.uib.no/SGI_bookshelves/SGI_Developer/books/OpenGL_RM/sgi_html/ch06.html#id5556407

gluPerspective(fovY, aspect, zNear, zFar)

Set up a perspective projection matrix.
Parameters:
fovY - Specifies the field of view angle, in degrees, in the y direction.
           (type=double)
aspect - Specifies the aspect ratio that determines the field of view in the x direction. The aspect ratio is the ratio of x (width) to y (height).
           (type=double)
zNear - Specifies the distance from the viewer to the near clipping plane (always positive).
           (type=double)
zFar - Specifies the distance from the viewer to the far clipping plane (always positive).
           (type=double)

See Also: http://www.parallab.uib.no/SGI_bookshelves/SGI_Developer/books/OpenGL_RM/sgi_html/ch06.html#id5557116

gluPickMatrix(x, y, width, height, viewport)

Define a picking region
Parameters:
x, y - Specify the center of a picking region in window coordinates.
           (type of x=double)
           (type of y=double)
width, height - Specify the width and height, respectively, of the picking region in window coordinates.
           (type of width=double)
           (type of height=double)
viewport - Specifies the current viewport.
           (type=Buffer object. [int])

See Also: http://www.parallab.uib.no/SGI_bookshelves/SGI_Developer/books/OpenGL_RM/sgi_html/ch06.html#id5557442

gluProject(objx, objy, objz, modelMatrix, projMatrix, viewport, winx, winy, winz)

Map object coordinates to window coordinates.
Parameters:
objx, objy, objz - Specify the object coordinates.
           (type of objx=double)
           (type of objy=double)
           (type of objz=double)
modelMatrix - Specifies the current modelview matrix (as from a glGetDoublev call).
           (type=Buffer object. [double])
projMatrix - Specifies the current projection matrix (as from a glGetDoublev call).
           (type=Buffer object. [double])
viewport - Specifies the current viewport (as from a glGetIntegerv call).
           (type=Buffer object. [int])
winx, winy, winz - Return the computed window coordinates.
           (type of winx=Buffer object. [double])
           (type of winy=Buffer object. [double])
           (type of winz=Buffer object. [double])

See Also: http://www.parallab.uib.no/SGI_bookshelves/SGI_Developer/books/OpenGL_RM/sgi_html/ch06.html#id5557853

gluUnProject(winx, winy, winz, modelMatrix, projMatrix, viewport, objx, objy, objz)

Map object coordinates to window coordinates.
Parameters:
winx, winy, winz - Specify the window coordinates to be mapped.
           (type of winx=double)
           (type of winy=double)
           (type of winz=double)
modelMatrix - Specifies the current modelview matrix (as from a glGetDoublev call).
           (type=Buffer object. [double])
projMatrix - Specifies the current projection matrix (as from a glGetDoublev call).
           (type=Buffer object. [double])
viewport - Specifies the current viewport (as from a glGetIntegerv call).
           (type=Buffer object. [int])
objx, objy, objz - Return the computed object coordinates.
           (type of objx=Buffer object. [double])
           (type of objy=Buffer object. [double])
           (type of objz=Buffer object. [double])

See Also: http://www.parallab.uib.no/SGI_bookshelves/SGI_Developer/books/OpenGL_RM/sgi_html/ch06.html#id5557853

glVertex(x, y, z, w, v)

glVertex2d, glVertex2f, glVertex2i, glVertex2s, glVertex3d, glVertex3f, glVertex3i, glVertex3s, glVertex4d, glVertex4f, glVertex4i, glVertex4s, glVertex2dv, glVertex2fv, glVertex2iv, glVertex2sv, glVertex3dv, glVertex3fv, glVertex3iv, glVertex3sv, glVertex4dv, glVertex4fv, glVertex4iv, glVertex4sv

Specify a vertex
Parameters:
x, y, z, w - Specify x, y, z, and w coordinates of a vertex. Not all parameters are present in all forms of the command.
           (type of x=Depends on function prototype (z and w for '3' and '4' prototypes only))
           (type of y=Depends on function prototype (z and w for '3' and '4' prototypes only))
           (type of z=Depends on function prototype (z and w for '3' and '4' prototypes only))
           (type of w=Depends on function prototype (z and w for '3' and '4' prototypes only))
v - Specifies a pointer to an array of two, three, or four elements. The elements of a two-element array are x and y; of a three-element array, x, y, and z; and of a four-element array, x, y, z, and w.
           (type=Buffer object. Depends of function prototype (for 'v' prototypes only))

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/vertex.html

glViewport(x, y, width, height)

Set the viewport
Parameters:
x, y - Specify the lower left corner of the viewport rectangle, in pixels. The initial value is (0,0).
           (type of x=int)
           (type of y=int)
width, height - Specify the width and height of the viewport. When a GL context is first attached to a window, width and height are set to the dimensions of that window.
           (type of width=int)
           (type of height=int)

See Also: www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/viewport.html


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