threejs-geometry

Built-in and custom 3D geometry creation with BufferGeometry, instancing, and path-based shapes. The base class for all geometries. Stores data as typed arrays for GPU efficiency. Efficiently render many copies of the same geometry. For custom per-instance attributes beyond transform/color. - Includes 15+ built-in geometries: basic shapes (box, sphere, plane, cylinder, cone, torus), polyhedra (dodecahedron, icosahedron), and path-based forms (lathe, extrude, tube, text) - Custom BufferGeometry with typed arrays for vertices, indices, normals, UVs, and per-vertex colors; supports interleaved buffers for memory efficiency - InstancedMesh for rendering thousands of identical objects with per-instance transforms and colors; InstancedBufferGeometry for custom per-instance attributes - Utilities for merging geometries, computing tangents, wireframe/edge visualization, point clouds, and lines; includes morph targets and runtime modification patterns - Use indexed geometry : Reuse vertices with indices - Merge static meshes : Reduce draw calls with mergeGeometries - Use InstancedMesh : For many identical objects - Choose appropriate segment counts : More segments = smoother but slower - Dispose unused geometry : geometry.dispose() - threejs-fundamentals - Scene setup and Object3D - threejs-materials - Material types for meshes - threejs-shaders - Custom vertex manipulation