Module Ipo :: Class Ipo

Class Ipo

The Ipo object

This object gives access to Ipo data from all objects in Blender.

Note:

Blender Materials, Lamps and Worlds have texture channels which allow the user to assign textures to them. The Blender Ipo Window allows the user to access the IpoCurves for these channels by specifying a number between 0 and 9 (the number appears next to the Ipo type in the window header). Prior to Version 2.42, the BPy API did not allow users to access these texture channels in a predictable manner. A new attribute named channel was added to the API in Version 2.42 to correct this problem.

The current channel setting has an effect on the operators [], len() and others. For example, suppose a Material has three IpoCurves (R, G, and B), and two texture channels (numbered 0 and 1), and furthermore channel 0 has one Ipocurve (Col). The IpoCurve Col can only be "seen" through the API when ipo.channel is 0. Setting ipo.channel to 1 will cause this curve to be ignored by len(ipo):

 from Blender import Ipo

 ipo = Ipo.Get('MatIpo')
 for channel in xrange(2):
     ipo.channel = channel
     print 'channel is',channel
         print ' len is',len(ipo)
     names = dict([(x[1],x[0]) for x in ipo.curveConsts.items()])
     for curve in [Ipo.MA_R,Ipo.MA_COL]:
         print ' ',names[curve],'is',curve in ipo

will output:

 channel is 0
 len is 4
   MA_R is True
   MA_COL is True
 channel is 1
 len is 3
   MA_R is True
   MA_COL is False

Method Summary
Boolean	`__contains__()` The "in" operator for Ipos.
IpoCurve or None	`__getitem__()` This operator is similar to the Python dictionary mapping operator [], except that the user cannot assign arbitrary keys.
IpoCurve	`__iter__()` Iterator for Ipos.
int	`__len__()` Returns the number of curves defined for the Ipo.
IpoCurve object	`addCurve(curvename)` Add a new curve to the Ipo object.
None	`delCurve(curvename)` Delete an existing curve from the Ipo object (deprecated).
float	`EvaluateCurveOn(curvepos, time)` Gets the value at a specific time of a curve of the Ipo (deprecated).
list of 9 floats	`getBeztriple(curvepos, pointpos)` Gets a beztriple of the Ipo (deprecated).
int	`getBlocktype()` Gets the blocktype of the Ipo.
IpoCurve object	`getCurve(curve)` Return the specified IpoCurve (deprecated).
	`getCurveBP(curvepos)` This method is unsupported.
float	`getCurveCurval(curvepos)` Gets the current value of a curve of the Ipo (deprecated).
list of IpoCurves	`getCurves()` Gets all the IpoCurves of the Ipo (deprecated).
string	`getName()` Gets the name of the Ipo (deprecated).
int	`getNcurves()` Gets the number of curves of the Ipo (deprecated).
list of floats	`getRctf()` Gets the rctf of the Ipo.
None	`setBeztriple(curvepos, pointpos, newbeztriple)` Sets the beztriple of the Ipo (deprecated).
None	`setBlocktype(newblocktype)` Sets the blocktype of the Ipo.
None	`setName(newname)` Sets the name of the Ipo (deprecated).
None	`setRctf(newrctf)` Sets the rctf of the Ipo.

Instance Variable Summary
int or None	`channel`: the current texture channel for Blender object which support textures (materials, lamps and worlds).
constant or list of strings. Read-only.	`curveConsts`: The valid Ipo curves for this Ipo.
list of Ipocurves.	`curves`: Ipo curves currently defined for the Ipo.
string	`name`: The Ipo datablock's name

Method Details

contains()
(In operator)

The "in" operator for Ipos. It returns True if the specified IpoCurve exists for the Ipo. This operator should not be used to test for whether a curve constant is valid for a particular Ipo type. Many constants for different Ipo types have the same value, and it is the constant's value used internally. No exceptions are raised if the argument is not a valid curve constant or or string, nor does the operator return True when the curve constant is valid but does not currently exist. As such, it should only be used to test for specific curves when the Ipo type is known:

 ipo = Object.Get('Cube').ipo # get Object-type Ipo 
 if ipo:
   print Ipo.OB_LOCX in ipo # prints "True" if 'LocX' curve exists
   print Ipo.MA_R in ipo    # also prints "True" since MA_R and OB_LOCX are have the same value
   print 'hiccup' in ipo    # always prints "False" since argument is not a constant

Returns:: see above.
(type=Boolean)

getitem()
(Indexing operator)

This operator is similar to the Python dictionary mapping operator [], except that the user cannot assign arbitrary keys. Each Ipo type has a pre-defined set of IpoCurves which may or may not exist at a given time. This operator will either return an IpoCurve object if the specified curve exists, return None if the curve does not exists, or throws a KeyError exception if the curve is not valid for this Ipo type.

Returns:: an IpoCurve object if it exists
(type=IpoCurve or None)

Raises:: KeyError - an undefined IpoCurve was specified for the Ipo

iter()

Iterator for Ipos. It returns all the defined IpoCurve objects associated with the Ipo. For example:

  from Blender import Ipo

  ipo = Ipo.Get()
  if len(ipo) > 0:
    ipo = ipo[0]
    print 'ipo name is',ipo.name
    for icu in ipo:
      print ' curve name is',icu.name

might result in:

  ipo name is ObIpo
    curve name is LocX
    curve name is LocY
    curve name is LocZ

Returns:: an IpoCurve object
(type=IpoCurve)

len()
(Length operator)

Returns the number of curves defined for the Ipo.

Returns:: number of defined IpoCurves
(type=int)

addCurve(curvename)

Add a new curve to the Ipo object. The possible values for curvename are:

Camera Ipo: Lens, ClSta, ClEnd, Apert, FDist.
Material Ipo: R, G, B, SpecR, SpecG, SpecB, MirR, MirG, MirB, Ref, Alpha, Emit, Amb, Spec, Hard, SpTra, Ior, Mode, HaSize, Translu, RayMir, FresMir, FresMirI, FresTra, FresTraI, TraGlow, OfsX, OfsY, OfsZ, SizeX, SizeY, SizeZ, texR, texG, texB, DefVar, Col, Nor, Var, Disp.
Object Ipo: LocX, LocY, LocZ, dLocX, dLocY, dLocZ, RotX, RotY, RotZ, dRotX, dRotY, dRotZ, SizeX, SizeY, SizeZ, dSizeX, dSizeY, dSizeZ, Layer, Time, ColR, ColG, ColB, ColA, FStreng, FFall, Damping, RDamp, Perm.
Lamp Ipo: Energ, R, G, B, Dist, SpoSi, SpoBl, Quad1, Quad2, HaInt.
World Ipo: HorR, HorG, HorB, ZenR, ZenG, ZenB, Expos, Misi, MisDi, MisSta, MisHi, StaR, StaG, StaB, StarDi, StarSi, OfsX, OfsY, OfsZ, SizeX, SizeY, SizeZ, TexR, TexG, TexB, DefVar, Col, Nor, Var.

World Ipo: HorR, HorG, HorB, ZenR, ZenG, ZenB, Expos, Misi, MisDi, MisSta, MisHi, StarR, StarB, StarG, StarDi, StarSi, OfsX, OfsY, OfsZ,i SizeX, SizeY, SizeZ, texR, texG, texB, DefVar, Col, Nor, Var.
Texture Ipo: NSize, NDepth, NType, Turb, Vnw1, Vnw2, Vnw3, Vnw4, MinkMExp, DistM, ColT, iScale, DistA, MgType, MgH, Lacu, Oct, MgOff, MgGain, NBase1, NBase2.
Curve Ipo: Speed.
Action Ipo: LocX, LocY, LocZ, SizeX, SizeY, SizeZ, QuatX, QuatY, QuatZ, QuatW.
Sequence Ipo: Fac.
Constraint Ipo: Inf.

For Key IPOs, the name must be an existing KeyBlock name. Use curveConsts to determine the set of valid names.

Parameters:: curvename
(type=string)

Returns:: the corresponding IpoCurve, or None.
(type=IpoCurve object)

Raises:: ValueError - curvename is not valid or already exists

delCurve(curvename)

Delete an existing curve from the Ipo object (deprecated). Use the mapping operator [] instead:

  from Blender import Ipo

  ipo = Ipo.Get('ObIpo')
  ipo[Ipo.LOCX] = None

Parameters:: curvename
(type=string)

Returns:: None.
(type=None)

EvaluateCurveOn(curvepos, time)

Gets the value at a specific time of a curve of the Ipo (deprecated). Note: new scripts should use IpoCurve.evaluate().

Parameters:: curvepos - the position of the curve in the Ipo.
(type=int); time - the desired time.
(type=float)

Returns:: the current value of the selected curve of the Ipo at the given time.
(type=float)

getBeztriple(curvepos, pointpos)

Gets a beztriple of the Ipo (deprecated). Note: Use IpoCurve.bezierPoints instead.

Parameters:: curvepos - the position of the curve in the Ipo.
(type=int); pointpos - the position of the point in the curve.
(type=int)

Returns:: the beztriple of the Ipo, or an error is raised.
(type=list of 9 floats)

getBlocktype()

Gets the blocktype of the Ipo.

Returns:: the blocktype of the Ipo.
(type=int)

getCurve(curve)

Return the specified IpoCurve (deprecated). Use the

mapping 
  operator []

instead. If the curve does not exist in the Ipo, None is returned. curve can be either a string or an integer, denoting either the name of the Ipo curve or its internal adrcode. The possible Ipo curve names are:

Camera Ipo: Lens, ClSta, ClEnd, Apert, FDist.
Material Ipo: R, G, B, SpecR, SpecG, SpecB, MirR, MirG, MirB, Ref, Alpha, Emit, Amb, Spec, Hard, SpTra, Ior, Mode, HaSize, Translu, RayMir, FresMir, FresMirI, FresTra, FresTraI, TraGlow, OfsX, OfsY, OfsZ, SizeX, SizeY, SizeZ, texR, texG, texB, DefVar, Col, Nor, Var, Disp.
Object Ipo: LocX, LocY, LocZ, dLocX, dLocY, dLocZ, RotX, RotY, RotZ, dRotX, dRotY, dRotZ, SizeX, SizeY, SizeZ, dSizeX, dSizeY, dSizeZ, Layer, Time, ColR, ColG, ColB, ColA, FStreng, FFall, Damping, RDamp, Perm.
Lamp Ipo: Energ, R, G, B, Dist, SpoSi, SpoBl, Quad1, Quad2, HaInt.
World Ipo: HorR, HorG, HorB, ZenR, ZenG, ZenB, Expos, Misi, MisDi, MisSta, MisHi, StaR, StaG, StaB, StarDi, StarSi, OfsX, OfsY, OfsZ, SizeX, SizeY, SizeZ, TexR, TexG, TexB, DefVar, Col, Nor, Var.

World Ipo: HorR, HorG, HorB, ZenR, ZenG, ZenB, Expos, Misi, MisDi, MisSta, MisHi, StarR, StarB, StarG, StarDi, StarSi, OfsX, OfsY, OfsZ,i SizeX, SizeY, SizeZ, texR, texG, texB, DefVar, Col, Nor, Var.
Texture Ipo: NSize, NDepth, NType, Turb, Vnw1, Vnw2, Vnw3, Vnw4, MinkMExp, DistM, ColT, iScale, DistA, MgType, MgH, Lacu, Oct, MgOff, MgGain, NBase1, NBase2.
Curve Ipo: Speed.
Action Ipo: LocX, LocY, LocZ, SizeX, SizeY, SizeZ, QuatX, QuatY, QuatZ, QuatW.
Sequence Ipo: Fac.
Constraint Ipo: Inf.

The adrcode for the Ipo curve can also be given; this is useful for accessing curves for Shape Key Ipos. The adrcodes for Shape Key Ipo are numbered consecutively starting at 0.

Parameters:: curve
(type=string or int)

Returns:: the corresponding IpoCurve, or None.
(type=IpoCurve object)

Raises:: ValueError - curve is not a valid name or adrcode for this Ipo type.

getCurveBP(curvepos)

This method is unsupported. BPoint Ipo curves are not implemented. Calling this method throws a NotImplementedError exception.

Raises:: NotImplementedError - this method always raises an exception

getCurveCurval(curvepos)

Gets the current value of a curve of the Ipo (deprecated). Note: new scripts should use IpoCurve.evaluate().

Parameters:: curvepos - the position of the curve in the Ipo or the name of the curve
(type=int or string)

Returns:: the current value of the selected curve of the Ipo.
(type=float)

getCurves()

Gets all the IpoCurves of the Ipo (deprecated). Use the

iterator operator 
  []

instead.

Returns:: A list (possibly empty) containing all the IpoCurves associated to the Ipo object.
(type=list of IpoCurves)

getName()

Gets the name of the Ipo (deprecated). See the name attribute.

Returns:: the name of the Ipo.
(type=string)

getNcurves()

Gets the number of curves of the Ipo (deprecated). Use len(ipo) instead.

Returns:: the number of curve of the Ipo.
(type=int)

getRctf()

Gets the rctf of the Ipo. Kind of bounding box...

Returns:: the rctf of the Ipo.
(type=list of floats)

setBeztriple(curvepos, pointpos, newbeztriple)

Sets the beztriple of the Ipo (deprecated). Note: use IpoCurve.bezierPoints to get a BezTriple point, then use the BezTriple API to set the point's attributes.

Parameters:: curvepos - the position of the curve in the Ipo.
(type=int); pointpos - the position of the point in the curve.
(type=int); newbeztriple - the new value for the point
(type=list of 9 floats)

Returns:: None
(type=None)

setBlocktype(newblocktype)

Sets the blocktype of the Ipo.

Parameters:: newblocktype
(type=int)

Returns:: None
(type=None)

Warning: 'newblocktype' should not be changed unless you really know what you are doing ...

setName(newname)

Sets the name of the Ipo (deprecated). See the name attribute.

Parameters:: newname
(type=string)

Returns:: None
(type=None)

setRctf(newrctf)

Sets the rctf of the Ipo.

Parameters:: newrctf
(type=four floats.)

Returns:: None
(type=None)

Warning: rctf should not be changed unless you really know what you are doing ...

Instance Variable Details

channel

the current texture channel for Blender object which support textures (materials, lamps and worlds). Returns None if the Ipo does not support texture channels. Value must be in the range [0,9].

Type:: int or None

curveConsts

The valid Ipo curves for this Ipo. These can be used by the [] mapping operator. The value depends on the Ipo curve type. If the Ipo is any type other than a Key or Shape Ipo, this attribute returns a set of constants that can be used to specify a particular curve. For Key or Shape Ipos, the attribute returns a list of all defined keys by name.

Type:: constant or list of strings. Read-only.

curves

Ipo curves currently defined for the Ipo.

Type:: list of Ipocurves.

name

The Ipo datablock's name

Type:: string

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