Question

A class containing utility functions for BufferGeometry instances.

Methods

.mergeBufferGeometries ( geometries : Array, useGroups : Boolean ) : BufferGeometry

geometries -- Array of BufferGeometry instances.
useGroups -- Whether groups should be generated for the merged geometry or not.

Merges a set of geometries into a single instance. All geometries must have compatible attributes. If merge does not succeed, the method returns null.

.mergeBufferAttributes ( attributes : Array ) : BufferAttribute

attributes -- Array of BufferAttribute instances.

Merges a set of attributes into a single instance. All attributes must have compatible properties and types, and InterleavedBufferAttributes are not supported. If merge does not succeed, the method returns null.

.interleaveAttributes ( attributes : Array ) : InterleavedBufferAttribute

attributes -- Array of BufferAttribute instances.

Interleaves a set of attributes and returns a new array of corresponding attributes that share a single InterleavedBuffer instance. All attributes must have compatible types. If merge does not succeed, the method returns null.

.estimateBytesUsed ( geometry : BufferGeometry ) : Number

geometry -- Instance of BufferGeometry to estimate the memory use of.

Returns the amount of bytes used by all attributes to represent the geometry.

.mergeVertices ( geometry : BufferGeometry, tolerance : Number ) : BufferGeometry

geometry -- Instance of BufferGeometry to merge the vertices of.
tolerance -- The maximum allowable difference between vertex attributes to merge. Defaults to 1e-4.

Returns a new BufferGeometry with vertices for which all similar vertex attributes (within tolerance) are merged.

.toTrianglesDrawMode ( geometry : BufferGeometry, drawMode : TrianglesDrawMode ) : BufferGeometry

geometry -- Instance of BufferGeometry.
drawMode -- The draw mode of the given geometry.

Returns a new indexed BufferGeometry based on the THREE.TrianglesDrawMode draw mode. This mode corresponds to the gl.TRIANGLES WebGL primitive.

Source

examples/jsm/utils/BufferGeometryUtils.js