setFromAttributeAndIndices( attribute, i0, i1, i2 ) {

		this.a.fromBufferAttribute( attribute, i0 );
		this.b.fromBufferAttribute( attribute, i1 );
		this.c.fromBufferAttribute( attribute, i2 );

		return this;

	}
Sets the triangle's vertices by copying the given attribute values.

@param {BufferAttribute} attribute - A buffer attribute with 3D points data.
@param {number} i0 - The attribute index representing the first corner of the triangle.
@param {number} i1 - The attribute index representing the second corner of the triangle.
@param {number} i2 - The attribute index representing the third corner of the triangle.
@return {Triangle} A reference to this triangle.