func (node *Node) RelativePosition(n *Node) (mgl32.Vec3, error) {
if node == n {
return mgl32.Vec3{}, nil
}
for _, child := range node.children {
if childNode, ok := child.(*Node); ok {
if rPost, err := childNode.RelativePosition(n); err == nil {
return mgl32.TransformCoordinate(rPost, childNode.Transform), nil
}
}
}
return mgl32.Vec3{}, fmt.Errorf("Node not found")
}
func (geometry *Geometry) transformRange(transform mgl32.Mat4, from int) {
for i := from; i < len(geometry.Verticies); i = i + VertexStride {
v := mgl32.TransformCoordinate(mgl32.Vec3{
geometry.Verticies[i],
geometry.Verticies[i+1],
geometry.Verticies[i+2],
}, transform)
n := mgl32.TransformNormal(mgl32.Vec3{
geometry.Verticies[i+3],
geometry.Verticies[i+4],
geometry.Verticies[i+5],
}, transform)
geometry.Verticies[i] = v.X()
geometry.Verticies[i+1] = v.Y()
geometry.Verticies[i+2] = v.Z()
geometry.Verticies[i+3] = n.X()
geometry.Verticies[i+4] = n.Y()
geometry.Verticies[i+5] = n.Z()
}
geometry.updateGeometry()
}
func (sceneGraph *SceneGraph) sortBuckets(renderer Renderer, cameraLocation mgl32.Vec3) {
for index, entry := range sceneGraph.transparentBucket {
sceneGraph.transparentBucket[index].cameraDelta = mgl32.TransformCoordinate(entry.spatial.Centre(), entry.transform).Sub(cameraLocation).Len()
}
sort.Sort(sceneGraph.transparentBucket)
}