Method ReadFaces

geometry/geometry.go:275–302

ReadFaces iterates over all the vertices and calls the specified callback function with face-forming vertex triples. The callback function returns false to continue or true to break.

(cb func(vA, vB, vC math32.Vector3) bool)

// the specified callback function with face-forming vertex triples.
// The callback function returns false to continue or true to break.
func (g *Geometry) ReadFaces(cb func(vA, vB, vC math32.Vector3) bool) {

	// Get buffer with position vertices
	vbo := g.VBO(gls.VertexPosition)
	if vbo == nil {
		return
	}

	// If geometry has indexed vertices need to loop over indexes
	if g.Indexed() {
		var vA, vB, vC math32.Vector3
		positions := vbo.Buffer()
		for i := 0; i < g.indices.Size(); i += 3 {
			// Get face vertices
			positions.GetVector3(int(3*g.indices[i]), &vA)
			positions.GetVector3(int(3*g.indices[i+1]), &vB)
			positions.GetVector3(int(3*g.indices[i+2]), &vC)
			// Call callback with face vertices
			brk := cb(vA, vB, vC)
			if brk {
				break
			}
		}
	} else {
		// Geometry does NOT have indexed vertices - can read vertices in sequence
		vbo.ReadTripleVectors3(gls.VertexPosition, cb)
	}
}

// TODO Read and Operate on Texcoords, Faces, Edges, FaceNormals, etc...