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         final float viewAngle = (float) .6;
  27         topLeft = new Point3D(0,0, SIZE).rotate(-viewAngle, -viewAngle);
  28         topRight = new Point3D(0,0, SIZE).rotate(viewAngle, -viewAngle);
  29         bottomLeft = new Point3D(0,0,SIZE).rotate(-viewAngle, viewAngle);
  30         bottomRight = new Point3D(0,0,SIZE).rotate(viewAngle, viewAngle);
  31
  32         topLeft.rotate(-avatar.getAngleXZ(), -avatar.getAngleYZ());
  33         topRight.rotate(-avatar.getAngleXZ(), -avatar.getAngleYZ());
  34         bottomLeft.rotate(-avatar.getAngleXZ(), -avatar.getAngleYZ());
  35         bottomRight.rotate(-avatar.getAngleXZ(), -avatar.getAngleYZ());
  36
  37         // compute camera coordinates as if camera is at avatar's location and look
  38         cameraCenter = new Point3D(avatar.getLocation()).scaleDown(zoom);
  39         topLeft.add(cameraCenter);
  40         topRight.add(cameraCenter);
  41         bottomLeft.add(cameraCenter);
  42         bottomRight.add(cameraCenter);
  43
  44     }
  45
  46 }