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 /**
  13  * Represents camera view. Used to compute direction of rays during ray tracing.
  14  */
  15 public class CameraView {
  16
  17     /**
  18      * Camera view coordinates.
  19      */
  20     Point3D cameraCenter, topLeft, topRight, bottomLeft, bottomRight;
  21
  22     public CameraView(final Avatar avatar, final double zoom) {
  23         // compute camera view coordinates as if camera is at (0,0,0) and look at (0,0,1)
  24         final float viewAngle = (float) .6;
  25         cameraCenter = new Point3D();
  26         topLeft = new Point3D(0,0, SIZE).rotate(-viewAngle, -viewAngle);
  27         topRight = new Point3D(0,0, SIZE).rotate(viewAngle, -viewAngle);
  28         bottomLeft = new Point3D(0,0,SIZE).rotate(-viewAngle, viewAngle);
  29         bottomRight = new Point3D(0,0,SIZE).rotate(viewAngle, viewAngle);
  30
  31         topLeft.rotate(-avatar.getAngleXZ(), -avatar.getAngleYZ());
  32         topRight.rotate(-avatar.getAngleXZ(), -avatar.getAngleYZ());
  33         bottomLeft.rotate(-avatar.getAngleXZ(), -avatar.getAngleYZ());
  34         bottomRight.rotate(-avatar.getAngleXZ(), -avatar.getAngleYZ());
  35
  36         // place camera view at avatar location
  37         avatar.getLocation().clone().scaleDown(zoom).addTo(cameraCenter, topLeft, topRight, bottomLeft, bottomRight);
  38     }
  39
  40 }