2 * Sixth 3D engine. Author: Svjatoslav Agejenko.
3 * This project is released under Creative Commons Zero (CC0) license.
5 package eu.svjatoslav.sixth.e3d.math;
7 import eu.svjatoslav.sixth.e3d.geometry.Point3D;
9 public class Orientation implements Cloneable {
11 private double s1, c1, s2, c2;
13 private double angleXZ = 0;
14 private double angleYZ = 0;
16 public Orientation() {
20 public Orientation(final double angleXZ, final double angleYZ) {
21 this.angleXZ = angleXZ;
22 this.angleYZ = angleYZ;
27 public Orientation clone() {
28 return new Orientation(angleXZ, angleYZ);
31 private void computeMultipliers() {
32 s1 = Math.sin(angleXZ);
33 c1 = Math.cos(angleXZ);
35 s2 = Math.sin(angleYZ);
36 c2 = Math.cos(angleYZ);
39 public void rotate(final Point3D point3d) {
40 final double z1 = (point3d.z * c1) - (point3d.x * s1);
41 point3d.x = (point3d.z * s1) + (point3d.x * c1);
43 point3d.z = (z1 * c2) - (point3d.y * s2);
44 point3d.y = (z1 * s2) + (point3d.y * c2);
47 public void rotate(final double angleXZ, final double angleYZ) {
48 this.angleXZ += angleXZ;
49 this.angleYZ += angleYZ;