user: Show practical ways to work with Gpu in a Blender add-on or script – include code.

assistant: r(TextureNode) TextureNodeCombineColor(TextureNode) TextureNodeCompose(TextureNode) TextureNodeCoordinates(TextureNode) TextureNodeCurveRGB(TextureNode) TextureNodeCurveTime(TextureNode) TextureNodeDecompose(TextureNode) TextureNodeDistance(TextureNode) TextureNodeGroup(TextureNode) TextureNodeHueSaturation(TextureNode) TextureNodeImage(TextureNode) TextureNodeInvert(TextureNode) TextureNodeMath(TextureNode) TextureNodeMixRGB(TextureNode) TextureNodeOutput(TextureNode) TextureNodeRGBToBW(TextureNode) TextureNodeRotate(TextureNode) TextureNodeScale(TextureNode) TextureNodeSeparateColor(TextureNode) TextureNodeTexBlend(TextureNode) TextureNodeTexClouds(TextureNode) TextureNodeTexDistNoise(TextureNode) TextureNodeTexMagic(TextureNode) TextureNodeTexMarble(TextureNode) TextureNodeTexMusgrave(TextureNode) TextureNodeTexNoise(TextureNode) TextureNodeTexStucci(TextureNode) TextureNodeTexVoronoi(TextureNode) TextureNodeTexWood(TextureNode) TextureNodeTexture(TextureNode) TextureNodeTranslate(TextureNode) TextureNodeTree(NodeTree) TextureNodeValToNor(TextureNode) TextureNodeValToRGB(TextureNode) TextureNodeViewer(TextureNode) TextureSlot(bpy_struct) Theme(bpy_struct) ThemeBoneColorSet(bpy_struct) ThemeClipEditor(bpy_struct) ThemeCollectionColor(bpy_struct) ThemeCommon(bpy_struct) ThemeCommonAnim(bpy_struct) ThemeCommonCurves(bpy_struct) ThemeConsole(bpy_struct) ThemeDopeSheet(bpy_struct) ThemeFileBrowser(bpy_struct) ThemeFontStyle(bpy_struct) ThemeGradientColors(bpy_struct) ThemeGraphEditor(bpy_struct) ThemeImageEditor(bpy_struct) ThemeInfo(bpy_struct) ThemeNLAEditor(bpy_struct) ThemeNodeEditor(bpy_struct) ThemeOutliner(bpy_struct) ThemePreferences(bpy_struct) ThemeProperties(bpy_struct) ThemeRegions(bpy_struct) ThemeRegionsAssetShelf(bpy_struct) ThemeRegionsChannels(bpy_struct) ThemeRegionsScrubbing(bpy_struct) ThemeRegionsSidebars(bpy_struct) ThemeSequenceEditor(bpy_struct) ThemeSpaceGeneric(bpy_struct) ThemeSpaceGradient(bpy_struct) 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UnknownType(bpy_struct) UserAssetLibrary(bpy_struct) UserExtensionRepo(bpy_struct) UserExtensionRepoCollection(bpy_struct) UserSolidLight(bpy_struct) UvSculpt(bpy_struct) VIEW3D_AST_brush_gpencil_paint(AssetShelf) VIEW3D_AST_brush_gpencil_sculpt(AssetShelf) VIEW3D_AST_brush_gpencil_vertex(AssetShelf) VIEW3D_AST_brush_gpencil_weight(AssetShelf) VIEW3D_AST_brush_sculpt(AssetShelf) VIEW3D_AST_brush_sculpt_curves(AssetShelf) VIEW3D_AST_brush_texture_paint(AssetShelf) VIEW3D_AST_brush_vertex_paint(AssetShelf) VIEW3D_AST_brush_weight_paint(AssetShelf) VIEW3D_AST_pose_library(AssetShelf) VIEW3D_FH_camera_background_image(FileHandler) VIEW3D_FH_empty_image(FileHandler) VIEW3D_FH_vdb_volume(FileHandler) VIEWLAYER_UL_aov(UIList) VIEWLAYER_UL_linesets(UIList) VOLUME_UL_grids(UIList) VectorFont(ID) VertexGroup(bpy_struct) VertexGroupElement(bpy_struct) VertexGroups(bpy_struct) VertexPaint(Paint) VertexWeightEditModifier(Modifier) VertexWeightMixModifier(Modifier) 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XrActionMapItem(bpy_struct) XrActionMapItems(bpy_struct) XrActionMaps(bpy_struct) XrComponentPath(bpy_struct) XrComponentPaths(bpy_struct) XrEventData(bpy_struct) XrNavigation(bpy_struct) XrSessionSettings(bpy_struct) XrSessionState(bpy_struct) XrUserPath(bpy_struct) XrUserPaths(bpy_struct) bpy_prop_collection bpy_prop_collection_idprop bpy_struct wmOwnerID(bpy_struct) wmOwnerIDs(bpy_struct) wmTools(bpy_struct) Shared Enum Types Toggle navigation of Shared Enum Types Id Type Items Object Mode Items Workspace Object Mode Items Object Empty Drawtype Items Object Gpencil Type Items Metaelem Type Items Color Space Convert Default Items Proportional Falloff Items Proportional Falloff Curve Only Items Snap Source Items Snap Element Items Snap Animation Element Items Curve Fit Method Items Mesh Select Mode Items Mesh Select Mode Uv Items Mesh Delimit Mode Items Space Graph Mode Items Space File Browse Mode Items Space Sequencer View Type Items Space Type Items Space Image Mode Items Space Image Mode All Items Space Action Mode Items Fileselect Params Sort Items Region Type Items Object Modifier Type Items Constraint Type Items Boidrule Type Items Strip Modifier Type Items Strip Video Modifier Type Items Strip Sound Modifier Type Items Strip Scale Method Items Object Shaderfx Type Items Modifier Triangulate Quad Method Items Modifier Triangulate Ngon Method Items Modifier Shrinkwrap Mode Items Shrinkwrap Type Items Shrinkwrap Face Cull Items Node Warning Type Items Image Type All Items Image Color Mode Items Image Color Depth Items Image Generated Type Items Normal Space Items Normal Swizzle Items Bake Save Mode Items Bake Margin Type Items Bake Target Items Views Format Items Views Format Multilayer Items Views Format Multiview Items Stereo3D Display Items Stereo3D Anaglyph Type Items Stereo3D Interlace Type Items Exr Codec Items Color Sets Items Beztriple Keyframe Type Items Beztriple Interpolation Mode Items Beztriple Interpolation Easing Items Fcurve Auto Smoothing 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Curve Items Rigidbody Object Type Items Rigidbody Object Shape Items Rigidbody Constraint Type Items Object Axis Items Bake Pass Type Items Bake Pass Filter Type Items Keymap Propvalue Items Operator Context Items Wm Report Items Wm Job Type Items Property Type Items Property Subtype Items Property Subtype String Items Property Subtype Number Items Property Subtype Number Array Items Property Unit Items Property Flag Items Property Flag Enum Items Property Override Flag Items Property Override Flag Collection Items Property String Search Flag Items Shading Type Items Navigation Mode Items Node Socket In Out Items Node Socket Type Items Node Tree Interface Item Type Items Node Socket Structure Type Items Node Math Items Mapping Type Items Node Vec Math Items Node Boolean Math Items Node Compare Operation Items Node Integer Math Items Node Float To Int Items Node Map Range Items Node Clamp Items Node Compositor Extension Items Node Compositor Interpolation Items Ramp Blend Items Prop Dynamicpaint Type Items Clip Editor Mode Items Icon Items Uilist Layout Type Items Linestyle Color Modifier Type Items Linestyle Alpha Modifier Type Items Linestyle Thickness Modifier Type Items Linestyle Geometry Modifier Type Items Window Cursor Items Dt Method Vertex Items Dt Method Edge Items Dt Method Loop Items Dt Method Poly Items Dt Mix Mode Items Dt Layers Select Src Items Dt Layers Select Dst Items Context Mode Items Preference Section Items Attribute Type Items Color Attribute Type Items Attribute Type With Auto Items Attribute Domain Items Attribute Domain Edge Face Items Attribute Domain Only Mesh Items Attribute Domain Only Mesh No Edge Items Attribute Domain Only Mesh No Corner Items Attribute Domain Point Face Curve Items Attribute Domain Point Edge Face Curve Items Attribute Curves Domain Items Color Attribute Domain Items Attribute Domain Without Corner Items Attribute Domain With Auto Items Geometry Component Type Items Node Combsep Color Items Node Socket Data Type Items Node Geometry Curve Handle Side Items Node Geometry Mesh Circle Fill Type Items Volume Grid Data Type Items Collection Color Items Strip Color Items Subdivision Uv Smooth Items Subdivision Boundary Smooth Items Transform Orientation Items Velocity Unit Items Curves Type Items Curves Handle Type Items Curve Normal Mode Items Geometry Nodes Gizmo Color Items Geometry Nodes Linear Gizmo Draw Style Items Particle Edit Hair Brush Items Particle Edit Disconnected Hair Brush Items Keyframe Paste Offset Items Keyframe Paste Offset Value Items Keyframe Paste Merge Items Transform Pivot Full Items Transform Mode Type Items Nla Mode Extend Items Nla Mode Blend Items Keyblock Type Items Asset Library Type Items File Path Foreach Flag Items Types with Custom Property Support Utilities (bpy.utils) Toggle navigation of Utilities (bpy.utils) bpy.utils submodule (bpy.utils.previews) bpy.utils submodule (bpy.utils.units) Path Utilities (bpy.path) Application Data (bpy.app) Toggle navigation of 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bpy_extras submodule (bpy_extras.id_map_utils) Freestyle Module (freestyle) Toggle navigation of Freestyle Module (freestyle) Freestyle Types (freestyle.types) Freestyle Predicates (freestyle.predicates) Freestyle Functions (freestyle.functions) Freestyle Chaining Iterators (freestyle.chainingiterators) Freestyle Shaders (freestyle.shaders) Freestyle Utilities (freestyle.utils) Toggle navigation of Freestyle Utilities (freestyle.utils) freestyle.utils submodule (freestyle.utils.ContextFunctions) GPU Module (gpu) Toggle navigation of GPU Module (gpu) GPU Types (gpu.types) GPU Matrix Utilities (gpu.matrix) GPU Select Utilities (gpu.select) GPU Shader Utilities (gpu.shader) GPU State Utilities (gpu.state) GPU Texture Utilities (gpu.texture) GPU Platform Utilities (gpu.platform) GPU Capabilities Utilities (gpu.capabilities) GPU Utilities (gpu_extras) Toggle navigation of GPU Utilities (gpu_extras) gpu_extras submodule (gpu_extras.batch) gpu_extras submodule (gpu_extras.presets) ID Property Access (idprop.types) Image Buffer (imbuf) Toggle navigation of Image Buffer (imbuf) Image Buffer Types (imbuf.types) Math Types & Utilities (mathutils) Toggle navigation of Math Types & Utilities (mathutils) Geometry Utilities (mathutils.geometry) BVHTree Utilities (mathutils.bvhtree) KDTree Utilities (mathutils.kdtree) Interpolation Utilities (mathutils.interpolate) Noise Utilities (mathutils.noise) 5.0 Versions Loading... Note You are not using the most up to date version of the documentation. is the newest version. Back to top Toggle Light / Dark / Auto color theme Toggle table of contents sidebar GPU Module (gpu) ¶ This module provides Python wrappers for the GPU implementation in Blender. Some higher level functions can be found in the gpu_extras module. Submodules GPU Types (gpu.types) GPU Matrix Utilities (gpu.matrix) GPU Select Utilities (gpu.select) GPU Shader Utilities (gpu.shader) GPU State Utilities (gpu.state) GPU Texture Utilities (gpu.texture) GPU Platform Utilities (gpu.platform) GPU Capabilities Utilities (gpu.capabilities) Geometry Batches ¶ Geometry is drawn in batches. A batch contains the necessary data to perform the drawing. That includes an obligatory Vertex Buffer and an optional Index Buffer , each of which is described in more detail in the following sections. A batch also defines a draw type. Typical draw types are POINTS , LINES and TRIS . The draw type determines how the data will be interpreted and drawn. Vertex Buffers ¶ A Vertex Buffer Object (VBO) ( gpu.types.GPUVertBuf ) is an array that contains the vertex attributes needed for drawing using a specific shader. Typical vertex attributes are location , normal , color , and uv . Every vertex buffer has a Vertex Format ( gpu.types.GPUVertFormat ) and a length corresponding to the number of vertices in the buffer. A vertex format describes the attributes stored per vertex and their types. The following code demonstrates the creation of a vertex buffer that contains 6 vertices. For each vertex 2 attributes will be stored: The position and the normal. import gpu vertex_positions = [( 0 , 0 , 0 ), ... ] vertex_normals = [( 0 , 0 , 1 ), ... ] fmt = gpu . types . GPUVertFormat () fmt . attr_add ( id = "pos" , comp_type = &#39;F32&#39; , len = 3 , fetch_mode = &#39;FLOAT&#39; ) fmt . attr_add ( id = "normal" , comp_type = &#39;F32&#39; , len = 3 , fetch_mode = &#39;FLOAT&#39; ) vbo = gpu . types . GPUVertBuf ( len = 6 , format = fmt ) vbo . attr_fill ( id = "pos" , data = vertex_positions ) vbo . attr_fill ( id = "normal" , data = vertex_normals ) This vertex buffer could be used to draw 6 points, 3 separate lines, 5 consecutive lines, 2 separate triangles, … E.g. in the case of lines, each two consecutive vertices define a line. The type that will actually be drawn is determined when the batch is created later. Index Buffers ¶ Often triangles and lines share one or more vertices. With only a vertex buffer one would have to store all attributes for the these vertices multiple times. This is very inefficient because in a connected triangle mesh every vertex is used 6 times on average. A more efficient approach would be to use an Index Buffer (IBO) ( gpu.types.GPUIndexBuf ), sometimes referred to as Element Buffer . An Index Buffer is an array that references vertices based on their index in the vertex buffer. For instance, to draw a rectangle composed of two triangles, one could use an index buffer. positions = ( ( - 1 , 1 ), ( 1 , 1 ), ( - 1 , - 1 ), ( 1 , - 1 )) indices = (( 0 , 1 , 2 ), ( 2 , 1 , 3 )) ibo = gpu . types . GPUIndexBuf ( type = &#39;TRIS&#39; , seq = indices ) Here the first tuple in indices describes which vertices should be used for the first triangle (same for the second tuple). Note how the diagonal vertices 1 and 2 are shared between both triangles. Shaders ¶ A shader is a program that runs on the GPU (written in GLSL in our case). There are multiple types of shaders. The most important ones are Vertex Shaders and Fragment Shaders . Typically multiple shaders are linked together into a Program . However, in the Blender Python API the term Shader refers to an OpenGL Program. Every gpu.types.GPUShader consists of a vertex shader, a fragment shader and an optional geometry shader. For common drawing tasks there are some built-in shaders accessible from gpu.shader.from_builtin with an identifier such as UNIFORM_COLOR or FLAT_COLOR . There are specific builtin shaders for drawing triangles, lines and points. Every shader defines a set of attributes and uniforms that have to be set in order to use the shader. Attributes are properties that are set using a vertex buffer and can be different for individual vertices. Uniforms are properties that are constant per draw call. They can be set using the shader.uniform_* functions after the shader has been bound. Note It is important to note that GLSL sources are reinterpreted to MSL (Metal Shading Language) on Apple operating systems. This uses a small compatibility layer that does not cover the whole GLSL language specification. Here is a list of differences to keep