threejs-geometry

To create custom BufferGeometry in Three.js, you define vertex positions, normals, and UVs as attributes, optionally using indexed geometry to avoid duplicating shared vertices. This provides advanced control over procedural shapes and custom meshes without reconstructing BufferGeometry details from memory.

The best way to reduce draw calls for repeated objects is using InstancedMesh or merging static meshes. This optimization significantly improves runtime performance by batching geometry, preventing the rendering pipeline from processing individual objects separately.

Updating normals and UVs after modifying vertices requires recalculating the BufferGeometry attributes to maintain correct lighting and texture mapping. This ensures procedural terrain modifications or custom vertex editing render accurately without visual artifacts.

Yes, you can generate procedural terrain and point clouds by constructing custom BufferGeometry and manipulating vertex positions directly. This workflow supports creating dynamic landscapes, wireframes, and point-based visualizations for efficient rendering.

Interleaved buffers and indexed geometry are needed in Three.js meshes to optimize memory usage and reduce vertex duplication. This attribute setup ensures efficient rendering and correct geometry structure for complex procedural modeling tasks.