NodeTree(ID)¶
Poll Function¶
The NodeTree.poll
function determines if a node tree is visible
in the given context (similar to how Panel.poll
and Menu.poll
define visibility). If it returns False,
the node tree type will not be selectable in the node editor.
A typical condition for shader nodes would be to check the active render engine of the scene and only show nodes of the renderer they are designed for.
import bpy
class CyclesNodeTree(bpy.types.NodeTree):
""" This operator is only visible when Cycles is the selected render engine"""
bl_label = "Cycles Node Tree"
@classmethod
def poll(cls, context):
return context.scene.render.engine == 'CYCLES'
bpy.utils.register_class(CyclesNodeTree)
base classes — bpy_struct
, ID
subclasses —
CompositorNodeTree
, ShaderNodeTree
, TextureNodeTree
-
class
bpy.types.
NodeTree
(ID)¶ Node tree consisting of linked nodes used for shading, textures and compositing
-
active_input
¶ Index of the active input
Type: int in [0, inf], default 0
-
active_output
¶ Index of the active output
Type: int in [0, inf], default 0
-
bl_description
¶ Type: string, default “”, (never None)
-
bl_icon
¶ The node tree icon
Type: enum in [‘NONE’, ‘QUESTION’, ‘ERROR’, ‘CANCEL’, ‘TRIA_RIGHT’, ‘TRIA_DOWN’, ‘TRIA_LEFT’, ‘TRIA_UP’, ‘ARROW_LEFTRIGHT’, ‘PLUS’, ‘DISCLOSURE_TRI_DOWN’, ‘DISCLOSURE_TRI_RIGHT’, ‘RADIOBUT_OFF’, ‘RADIOBUT_ON’, ‘MENU_PANEL’, ‘BLENDER’, ‘GRIP’, ‘DOT’, ‘COLLAPSEMENU’, ‘X’, ‘GO_LEFT’, ‘PLUG’, ‘UI’, ‘NODE’, ‘NODE_SEL’, ‘FULLSCREEN’, ‘SPLITSCREEN’, ‘RIGHTARROW_THIN’, ‘BORDERMOVE’, ‘VIEWZOOM’, ‘ZOOMIN’, ‘ZOOMOUT’, ‘PANEL_CLOSE’, ‘COPY_ID’, ‘EYEDROPPER’, ‘LINK_AREA’, ‘AUTO’, ‘CHECKBOX_DEHLT’, ‘CHECKBOX_HLT’, ‘UNLOCKED’, ‘LOCKED’, ‘UNPINNED’, ‘PINNED’, ‘SCREEN_BACK’, ‘RIGHTARROW’, ‘DOWNARROW_HLT’, ‘DOTSUP’, ‘DOTSDOWN’, ‘LINK’, ‘INLINK’, ‘PLUGIN’, ‘HELP’, ‘GHOST_ENABLED’, ‘COLOR’, ‘LINKED’, ‘UNLINKED’, ‘HAND’, ‘ZOOM_ALL’, ‘ZOOM_SELECTED’, ‘ZOOM_PREVIOUS’, ‘ZOOM_IN’, ‘ZOOM_OUT’, ‘RENDER_REGION’, ‘BORDER_RECT’, ‘BORDER_LASSO’, ‘FREEZE’, ‘STYLUS_PRESSURE’, ‘GHOST_DISABLED’, ‘NEW’, ‘FILE_TICK’, ‘QUIT’, ‘URL’, ‘RECOVER_LAST’, ‘FULLSCREEN_ENTER’, ‘FULLSCREEN_EXIT’, ‘BLANK1’, ‘LAMP’, ‘MATERIAL’, ‘TEXTURE’, ‘ANIM’, ‘WORLD’, ‘SCENE’, ‘EDIT’, ‘GAME’, ‘RADIO’, ‘SCRIPT’, ‘PARTICLES’, ‘PHYSICS’, ‘SPEAKER’, ‘TEXTURE_SHADED’, ‘VIEW3D’, ‘IPO’, ‘OOPS’, ‘BUTS’, ‘FILESEL’, ‘IMAGE_COL’, ‘INFO’, ‘SEQUENCE’, ‘TEXT’, ‘IMASEL’, ‘SOUND’, ‘ACTION’, ‘NLA’, ‘SCRIPTWIN’, ‘TIME’, ‘NODETREE’, ‘LOGIC’, ‘CONSOLE’, ‘PREFERENCES’, ‘CLIP’, ‘ASSET_MANAGER’, ‘OBJECT_DATAMODE’, ‘EDITMODE_HLT’, ‘FACESEL_HLT’, ‘VPAINT_HLT’, ‘TPAINT_HLT’, ‘WPAINT_HLT’, ‘SCULPTMODE_HLT’, ‘POSE_HLT’, ‘PARTICLEMODE’, ‘LIGHTPAINT’, ‘SCENE_DATA’, ‘RENDERLAYERS’, ‘WORLD_DATA’, ‘OBJECT_DATA’, ‘MESH_DATA’, ‘CURVE_DATA’, ‘META_DATA’, ‘LATTICE_DATA’, ‘LAMP_DATA’, ‘MATERIAL_DATA’, ‘TEXTURE_DATA’, ‘ANIM_DATA’, ‘CAMERA_DATA’, ‘PARTICLE_DATA’, ‘LIBRARY_DATA_DIRECT’, ‘GROUP’, ‘ARMATURE_DATA’, ‘POSE_DATA’, ‘BONE_DATA’, ‘CONSTRAINT’, ‘SHAPEKEY_DATA’, ‘CONSTRAINT_BONE’, ‘CAMERA_STEREO’, ‘PACKAGE’, ‘UGLYPACKAGE’, ‘BRUSH_DATA’, ‘IMAGE_DATA’, ‘FILE’, ‘FCURVE’, ‘FONT_DATA’, ‘RENDER_RESULT’, ‘SURFACE_DATA’, ‘EMPTY_DATA’, ‘SETTINGS’, ‘RENDER_ANIMATION’, ‘RENDER_STILL’, ‘LIBRARY_DATA_BROKEN’, ‘BOIDS’, ‘STRANDS’, ‘LIBRARY_DATA_INDIRECT’, ‘GREASEPENCIL’, ‘LINE_DATA’, ‘GROUP_BONE’, ‘GROUP_VERTEX’, ‘GROUP_VCOL’, ‘GROUP_UVS’, ‘RNA’, ‘RNA_ADD’, ‘OUTLINER_OB_EMPTY’, ‘OUTLINER_OB_MESH’, ‘OUTLINER_OB_CURVE’, ‘OUTLINER_OB_LATTICE’, ‘OUTLINER_OB_META’, ‘OUTLINER_OB_LAMP’, ‘OUTLINER_OB_CAMERA’, ‘OUTLINER_OB_ARMATURE’, ‘OUTLINER_OB_FONT’, ‘OUTLINER_OB_SURFACE’, ‘OUTLINER_OB_SPEAKER’, ‘RESTRICT_COLOR_OFF’, ‘RESTRICT_COLOR_ON’, ‘RESTRICT_VIEW_OFF’, ‘RESTRICT_VIEW_ON’, ‘RESTRICT_SELECT_OFF’, ‘RESTRICT_SELECT_ON’, ‘RESTRICT_RENDER_OFF’, ‘RESTRICT_RENDER_ON’, ‘OUTLINER_DATA_EMPTY’, ‘OUTLINER_DATA_MESH’, ‘OUTLINER_DATA_CURVE’, ‘OUTLINER_DATA_LATTICE’, ‘OUTLINER_DATA_META’, ‘OUTLINER_DATA_LAMP’, ‘OUTLINER_DATA_CAMERA’, ‘OUTLINER_DATA_ARMATURE’, ‘OUTLINER_DATA_FONT’, ‘OUTLINER_DATA_SURFACE’, ‘OUTLINER_DATA_SPEAKER’, ‘OUTLINER_DATA_POSE’, ‘MESH_PLANE’, ‘MESH_CUBE’, ‘MESH_CIRCLE’, ‘MESH_UVSPHERE’, ‘MESH_ICOSPHERE’, ‘MESH_GRID’, ‘MESH_MONKEY’, ‘MESH_CYLINDER’, ‘MESH_TORUS’, ‘MESH_CONE’, ‘MESH_CAPSULE’, ‘LAMP_POINT’, ‘LAMP_SUN’, ‘LAMP_SPOT’, ‘LAMP_HEMI’, ‘LAMP_AREA’, ‘META_EMPTY’, ‘META_PLANE’, ‘META_CUBE’, ‘META_BALL’, ‘META_ELLIPSOID’, ‘META_CAPSULE’, ‘SURFACE_NCURVE’, ‘SURFACE_NCIRCLE’, ‘SURFACE_NSURFACE’, ‘SURFACE_NCYLINDER’, ‘SURFACE_NSPHERE’, ‘SURFACE_NTORUS’, ‘CURVE_BEZCURVE’, ‘CURVE_BEZCIRCLE’, ‘CURVE_NCURVE’, ‘CURVE_NCIRCLE’, ‘CURVE_PATH’, ‘COLOR_RED’, ‘COLOR_GREEN’, ‘COLOR_BLUE’, ‘TRIA_RIGHT_BAR’, ‘TRIA_DOWN_BAR’, ‘TRIA_LEFT_BAR’, ‘TRIA_UP_BAR’, ‘FORCE_FORCE’, ‘FORCE_WIND’, ‘FORCE_VORTEX’, ‘FORCE_MAGNETIC’, ‘FORCE_HARMONIC’, ‘FORCE_CHARGE’, ‘FORCE_LENNARDJONES’, ‘FORCE_TEXTURE’, ‘FORCE_CURVE’, ‘FORCE_BOID’, ‘FORCE_TURBULENCE’, ‘FORCE_DRAG’, ‘FORCE_SMOKEFLOW’, ‘NODE_INSERT_ON’, ‘NODE_INSERT_OFF’, ‘MODIFIER’, ‘MOD_WAVE’, ‘MOD_BUILD’, ‘MOD_DECIM’, ‘MOD_MIRROR’, ‘MOD_SOFT’, ‘MOD_SUBSURF’, ‘HOOK’, ‘MOD_PHYSICS’, ‘MOD_PARTICLES’, ‘MOD_BOOLEAN’, ‘MOD_EDGESPLIT’, ‘MOD_ARRAY’, ‘MOD_UVPROJECT’, ‘MOD_DISPLACE’, ‘MOD_CURVE’, ‘MOD_LATTICE’, ‘CONSTRAINT_DATA’, ‘MOD_ARMATURE’, ‘MOD_SHRINKWRAP’, ‘MOD_CAST’, ‘MOD_MESHDEFORM’, ‘MOD_BEVEL’, ‘MOD_SMOOTH’, ‘MOD_SIMPLEDEFORM’, ‘MOD_MASK’, ‘MOD_CLOTH’, ‘MOD_EXPLODE’, ‘MOD_FLUIDSIM’, ‘MOD_MULTIRES’, ‘MOD_SMOKE’, ‘MOD_SOLIDIFY’, ‘MOD_SCREW’, ‘MOD_VERTEX_WEIGHT’, ‘MOD_DYNAMICPAINT’, ‘MOD_REMESH’, ‘MOD_OCEAN’, ‘MOD_WARP’, ‘MOD_SKIN’, ‘MOD_TRIANGULATE’, ‘MOD_WIREFRAME’, ‘MOD_DATA_TRANSFER’, ‘MOD_NORMALEDIT’, ‘REC’, ‘PLAY’, ‘FF’, ‘REW’, ‘PAUSE’, ‘PREV_KEYFRAME’, ‘NEXT_KEYFRAME’, ‘PLAY_AUDIO’, ‘PLAY_REVERSE’, ‘PREVIEW_RANGE’, ‘ACTION_TWEAK’, ‘PMARKER_ACT’, ‘PMARKER_SEL’, ‘PMARKER’, ‘MARKER_HLT’, ‘MARKER’, ‘SPACE2’, ‘SPACE3’, ‘KEYINGSET’, ‘KEY_DEHLT’, ‘KEY_HLT’, ‘MUTE_IPO_OFF’, ‘MUTE_IPO_ON’, ‘VISIBLE_IPO_OFF’, ‘VISIBLE_IPO_ON’, ‘DRIVER’, ‘SOLO_OFF’, ‘SOLO_ON’, ‘FRAME_PREV’, ‘FRAME_NEXT’, ‘NLA_PUSHDOWN’, ‘IPO_CONSTANT’, ‘IPO_LINEAR’, ‘IPO_BEZIER’, ‘IPO_SINE’, ‘IPO_QUAD’, ‘IPO_CUBIC’, ‘IPO_QUART’, ‘IPO_QUINT’, ‘IPO_EXPO’, ‘IPO_CIRC’, ‘IPO_BOUNCE’, ‘IPO_ELASTIC’, ‘IPO_BACK’, ‘IPO_EASE_IN’, ‘IPO_EASE_OUT’, ‘IPO_EASE_IN_OUT’, ‘VERTEXSEL’, ‘EDGESEL’, ‘FACESEL’, ‘LOOPSEL’, ‘ROTATE’, ‘CURSOR’, ‘ROTATECOLLECTION’, ‘ROTATECENTER’, ‘ROTACTIVE’, ‘ALIGN’, ‘SMOOTHCURVE’, ‘SPHERECURVE’, ‘ROOTCURVE’, ‘SHARPCURVE’, ‘LINCURVE’, ‘NOCURVE’, ‘RNDCURVE’, ‘PROP_OFF’, ‘PROP_ON’, ‘PROP_CON’, ‘SCULPT_DYNTOPO’, ‘PARTICLE_POINT’, ‘PARTICLE_TIP’, ‘PARTICLE_PATH’, ‘MAN_TRANS’, ‘MAN_ROT’, ‘MAN_SCALE’, ‘MANIPUL’, ‘SNAP_OFF’, ‘SNAP_ON’, ‘SNAP_NORMAL’, ‘SNAP_GRID’, ‘SNAP_VERTEX’, ‘SNAP_EDGE’, ‘SNAP_FACE’, ‘SNAP_VOLUME’, ‘SNAP_INCREMENT’, ‘STICKY_UVS_LOC’, ‘STICKY_UVS_DISABLE’, ‘STICKY_UVS_VERT’, ‘CLIPUV_DEHLT’, ‘CLIPUV_HLT’, ‘SNAP_PEEL_OBJECT’, ‘GRID’, ‘PASTEDOWN’, ‘COPYDOWN’, ‘PASTEFLIPUP’, ‘PASTEFLIPDOWN’, ‘SNAP_SURFACE’, ‘AUTOMERGE_ON’, ‘AUTOMERGE_OFF’, ‘RETOPO’, ‘UV_VERTEXSEL’, ‘UV_EDGESEL’, ‘UV_FACESEL’, ‘UV_ISLANDSEL’, ‘UV_SYNC_SELECT’, ‘BBOX’, ‘WIRE’, ‘SOLID’, ‘SMOOTH’, ‘POTATO’, ‘ORTHO’, ‘LOCKVIEW_OFF’, ‘LOCKVIEW_ON’, ‘AXIS_SIDE’, ‘AXIS_FRONT’, ‘AXIS_TOP’, ‘NDOF_DOM’, ‘NDOF_TURN’, ‘NDOF_FLY’, ‘NDOF_TRANS’, ‘LAYER_USED’, ‘LAYER_ACTIVE’, ‘SORTALPHA’, ‘SORTBYEXT’, ‘SORTTIME’, ‘SORTSIZE’, ‘LONGDISPLAY’, ‘SHORTDISPLAY’, ‘GHOST’, ‘IMGDISPLAY’, ‘SAVE_AS’, ‘SAVE_COPY’, ‘BOOKMARKS’, ‘FONTPREVIEW’, ‘FILTER’, ‘NEWFOLDER’, ‘OPEN_RECENT’, ‘FILE_PARENT’, ‘FILE_REFRESH’, ‘FILE_FOLDER’, ‘FILE_BLANK’, ‘FILE_BLEND’, ‘FILE_IMAGE’, ‘FILE_MOVIE’, ‘FILE_SCRIPT’, ‘FILE_SOUND’, ‘FILE_FONT’, ‘FILE_TEXT’, ‘RECOVER_AUTO’, ‘SAVE_PREFS’, ‘LINK_BLEND’, ‘APPEND_BLEND’, ‘IMPORT’, ‘EXPORT’, ‘EXTERNAL_DATA’, ‘LOAD_FACTORY’, ‘LOOP_BACK’, ‘LOOP_FORWARDS’, ‘BACK’, ‘FORWARD’, ‘FILE_HIDDEN’, ‘FILE_BACKUP’, ‘DISK_DRIVE’, ‘MATPLANE’, ‘MATSPHERE’, ‘MATCUBE’, ‘MONKEY’, ‘HAIR’, ‘ALIASED’, ‘ANTIALIASED’, ‘MAT_SPHERE_SKY’, ‘WORDWRAP_OFF’, ‘WORDWRAP_ON’, ‘SYNTAX_OFF’, ‘SYNTAX_ON’, ‘LINENUMBERS_OFF’, ‘LINENUMBERS_ON’, ‘SCRIPTPLUGINS’, ‘SEQ_SEQUENCER’, ‘SEQ_PREVIEW’, ‘SEQ_LUMA_WAVEFORM’, ‘SEQ_CHROMA_SCOPE’, ‘SEQ_HISTOGRAM’, ‘SEQ_SPLITVIEW’, ‘IMAGE_RGB’, ‘IMAGE_RGB_ALPHA’, ‘IMAGE_ALPHA’, ‘IMAGE_ZDEPTH’, ‘IMAGEFILE’, ‘BRUSH_ADD’, ‘BRUSH_BLOB’, ‘BRUSH_BLUR’, ‘BRUSH_CLAY’, ‘BRUSH_CLAY_STRIPS’, ‘BRUSH_CLONE’, ‘BRUSH_CREASE’, ‘BRUSH_DARKEN’, ‘BRUSH_FILL’, ‘BRUSH_FLATTEN’, ‘BRUSH_GRAB’, ‘BRUSH_INFLATE’, ‘BRUSH_LAYER’, ‘BRUSH_LIGHTEN’, ‘BRUSH_MASK’, ‘BRUSH_MIX’, ‘BRUSH_MULTIPLY’, ‘BRUSH_NUDGE’, ‘BRUSH_PINCH’, ‘BRUSH_SCRAPE’, ‘BRUSH_SCULPT_DRAW’, ‘BRUSH_SMEAR’, ‘BRUSH_SMOOTH’, ‘BRUSH_SNAKE_HOOK’, ‘BRUSH_SOFTEN’, ‘BRUSH_SUBTRACT’, ‘BRUSH_TEXDRAW’, ‘BRUSH_TEXFILL’, ‘BRUSH_TEXMASK’, ‘BRUSH_THUMB’, ‘BRUSH_ROTATE’, ‘BRUSH_VERTEXDRAW’, ‘MATCAP_01’, ‘MATCAP_02’, ‘MATCAP_03’, ‘MATCAP_04’, ‘MATCAP_05’, ‘MATCAP_06’, ‘MATCAP_07’, ‘MATCAP_08’, ‘MATCAP_09’, ‘MATCAP_10’, ‘MATCAP_11’, ‘MATCAP_12’, ‘MATCAP_13’, ‘MATCAP_14’, ‘MATCAP_15’, ‘MATCAP_16’, ‘MATCAP_17’, ‘MATCAP_18’, ‘MATCAP_19’, ‘MATCAP_20’, ‘MATCAP_21’, ‘MATCAP_22’, ‘MATCAP_23’, ‘MATCAP_24’], default ‘NODETREE’
-
bl_idname
¶ Type: string, default “”, (never None)
-
bl_label
¶ The node tree label
Type: string, default “”, (never None)
-
grease_pencil
¶ Grease Pencil data-block
Type: GreasePencil
-
inputs
¶ Node tree inputs
Type: NodeTreeInputs
bpy_prop_collection
ofNodeSocketInterface
, (readonly)
-
links
¶ Type: NodeLinks
bpy_prop_collection
ofNodeLink
, (readonly)
-
nodes
¶ Type: Nodes
bpy_prop_collection
ofNode
, (readonly)
-
outputs
¶ Node tree outputs
Type: NodeTreeOutputs
bpy_prop_collection
ofNodeSocketInterface
, (readonly)
-
type
¶ Node Tree type (deprecated, bl_idname is the actual node tree type identifier)
SHADER
Shader, Shader nodes.TEXTURE
Texture, Texture nodes.COMPOSITING
Compositing, Compositing nodes.
Type: enum in [‘SHADER’, ‘TEXTURE’, ‘COMPOSITING’], default ‘SHADER’, (readonly)
-
view_center
¶ Type: float array of 2 items in [-inf, inf], default (0.0, 0.0), (readonly)
-
interface_update
(context)¶ Updated node group interface
-
classmethod
poll
(context)¶ Check visibility in the editor
Return type: boolean
-
update
()¶ Update on editor changes
-
Inherited Properties
Inherited Functions
References