src/main/java/eu/svjatoslav/sixth/e3d/renderer/octree/raytracer/CameraView.java

   1 /*
   2  * Sixth 3D engine. Author: Svjatoslav Agejenko.
   3  * This project is released under Creative Commons Zero (CC0) license.
   4  */
   5 package eu.svjatoslav.sixth.e3d.renderer.octree.raytracer;
   6
   7 import eu.svjatoslav.sixth.e3d.geometry.Point3D;
   8 import eu.svjatoslav.sixth.e3d.gui.Avatar;
   9
  10 import static eu.svjatoslav.sixth.e3d.renderer.octree.raytracer.Camera.SIZE;
  11
  12 public class CameraView {
  13
  14     Point3D cameraCenter;
  15     Point3D topLeft;
  16     Point3D topRight;
  17     Point3D bottomLeft;
  18     Point3D bottomRight;
  19
  20     public CameraView(final Avatar avatar, final double zoom) {
  21         computeCameraCoordinates(avatar, zoom);
  22     }
  23
  24     private void computeCameraCoordinates(final Avatar avatar, final double zoom) {
  25
  26         // compute camera view coordinates as if camera is at (0,0,0) and look at (0,0,1)
  27         final float viewAngle = (float) .6;
  28         cameraCenter = new Point3D();
  29         topLeft = new Point3D(0,0, SIZE).rotate(-viewAngle, -viewAngle);
  30         topRight = new Point3D(0,0, SIZE).rotate(viewAngle, -viewAngle);
  31         bottomLeft = new Point3D(0,0,SIZE).rotate(-viewAngle, viewAngle);
  32         bottomRight = new Point3D(0,0,SIZE).rotate(viewAngle, viewAngle);
  33
  34         topLeft.rotate(-avatar.getAngleXZ(), -avatar.getAngleYZ());
  35         topRight.rotate(-avatar.getAngleXZ(), -avatar.getAngleYZ());
  36         bottomLeft.rotate(-avatar.getAngleXZ(), -avatar.getAngleYZ());
  37         bottomRight.rotate(-avatar.getAngleXZ(), -avatar.getAngleYZ());
  38
  39         // place camera view at avatar location
  40         avatar.getLocation().clone().scaleDown(zoom).addTo(cameraCenter, topLeft, topRight, bottomLeft, bottomRight);
  41     }
  42
  43 }