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

   1 /*
   2  * Sixth 3D engine. Copyright ©2012-2018, Svjatoslav Agejenko, svjatoslav@svjatoslav.eu
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of version 3 of the GNU Lesser General Public License
   6  * or later as published by the Free Software Foundation.
   7  *
   8  */
   9
  10 package eu.svjatoslav.sixth.e3d.renderer.octree.raytracer;
  11
  12 import eu.svjatoslav.sixth.e3d.gui.ViewPanel;
  13 import eu.svjatoslav.sixth.e3d.renderer.octree.OctreeVolume;
  14 import eu.svjatoslav.sixth.e3d.renderer.raster.Color;
  15 import eu.svjatoslav.sixth.e3d.renderer.raster.texture.Texture;
  16
  17 import java.util.Vector;
  18
  19 public class RayTracer implements Runnable {
  20
  21     private static final int PROGRESS_UPDATE_FREQUENCY_MILLIS = 1000;
  22     private final Camera camera;
  23     private final Texture texture;
  24     private final ViewPanel viewPanel;
  25     private OctreeVolume octreeVolume;
  26     private Vector<LightSource> lights;
  27     private int computedLights;
  28
  29     public RayTracer(final Texture texture, final OctreeVolume octreeVolume,
  30                      final Vector<LightSource> lights, final Camera camera,
  31                      final ViewPanel viewPanel) {
  32
  33         this.texture = texture;
  34         this.octreeVolume = octreeVolume;
  35         this.lights = lights;
  36         this.camera = camera;
  37         this.viewPanel = viewPanel;
  38     }
  39
  40     @Override
  41     public void run() {
  42         computedLights = 0;
  43
  44         // create camera
  45
  46         // Camera cam = new Camera(camCenter, upLeft, upRight, downLeft,
  47         // downRight);
  48
  49         // add camera to the raytracing point
  50         // Main.mainWorld.geometryCollection.addObject(cam);
  51         // Main.mainWorld.compiledGeometry.compileGeometry(Main.mainWorld.geometryCollection);
  52
  53         final int width = texture.primaryBitmap.width;
  54         final int height = texture.primaryBitmap.height;
  55
  56         final CameraView cameraView = camera.getCameraView();
  57
  58         // calculate vertical vectors
  59         final double x1p = cameraView.downLeft.x - cameraView.upLeft.x;
  60         final double y1p = cameraView.downLeft.y - cameraView.upLeft.y;
  61         final double z1p = cameraView.downLeft.z - cameraView.upLeft.z;
  62
  63         final double x2p = cameraView.downRight.x - cameraView.upRight.x;
  64         final double y2p = cameraView.downRight.y - cameraView.upRight.y;
  65         final double z2p = cameraView.downRight.z - cameraView.upRight.z;
  66
  67         long nextBitmapUpdate = System.currentTimeMillis()
  68                 + PROGRESS_UPDATE_FREQUENCY_MILLIS;
  69
  70         for (int y = 0; y < height; y++) {
  71             final double cx1 = cameraView.upLeft.x + ((x1p * y) / height);
  72             final double cy1 = cameraView.upLeft.y + ((y1p * y) / height);
  73             final double cz1 = cameraView.upLeft.z + ((z1p * y) / height);
  74
  75             final double cx2 = cameraView.upRight.x + ((x2p * y) / height);
  76             final double cy2 = cameraView.upRight.y + ((y2p * y) / height);
  77             final double cz2 = cameraView.upRight.z + ((z2p * y) / height);
  78
  79             // calculate horisontal vector
  80             final double x3p = cx2 - cx1;
  81             final double y3p = cy2 - cy1;
  82             final double z3p = cz2 - cz1;
  83
  84             for (int x = 0; x < width; x++) {
  85                 final double cx3 = cx1 + ((x3p * x) / width);
  86                 final double cy3 = cy1 + ((y3p * x) / width);
  87                 final double cz3 = cz1 + ((z3p * x) / width);
  88
  89                 final Ray r = new Ray(cameraView.camCenter.x,
  90                         cameraView.camCenter.y, cameraView.camCenter.z, cx3
  91                         - cameraView.camCenter.x, cy3
  92                         - cameraView.camCenter.y, cz3
  93                         - cameraView.camCenter.z);
  94                 final int c = traceRay(r);
  95
  96                 final Color color = new Color(c);
  97                 texture.primaryBitmap.drawPixel(x, y, color);
  98             }
  99
 100             if (System.currentTimeMillis() > nextBitmapUpdate) {
 101                 nextBitmapUpdate = System.currentTimeMillis()
 102                         + PROGRESS_UPDATE_FREQUENCY_MILLIS;
 103                 texture.resetResampledBitmapCache();
 104                 viewPanel.repaintDuringNextViewUpdate();
 105             }
 106         }
 107
 108         texture.resetResampledBitmapCache();
 109         viewPanel.repaintDuringNextViewUpdate();
 110     }
 111
 112     private int traceRay(final Ray ray) {
 113
 114         final int intersectingCell = octreeVolume.traceCell(0, 0, 0,
 115                 octreeVolume.masterCellSize, 0, ray);
 116
 117         if (intersectingCell != -1) {
 118             // if lightening not computed, compute it
 119             if (octreeVolume.ce3[intersectingCell] == -1)
 120                 // if cell is larger than 1
 121                 if (ray.hitCellSize > 1) {
 122                     // break it up
 123                     octreeVolume.breakSolidCell(intersectingCell);
 124                     return traceRay(ray);
 125                 } else {
 126                     computedLights++;
 127                     float red = 30, green = 30, blue = 30;
 128
 129                     for (final LightSource l : lights) {
 130                         final int xDist = (l.x - ray.hitCellX);
 131                         final int yDist = (l.y - ray.hitCellY);
 132                         final int zDist = (l.z - ray.hitCellZ);
 133
 134                         double newRed = 0, newGreen = 0, newBlue = 0;
 135                         double tempRed, tempGreen, tempBlue;
 136
 137                         double distance = Math.sqrt((xDist * xDist)
 138                                 + (yDist * yDist) + (zDist * zDist));
 139                         distance = (distance / 3) + 1;
 140
 141                         final Ray r1 = new Ray(ray.hitCellX, ray.hitCellY
 142                                 - (float) 1.5, ray.hitCellZ,
 143
 144                                 (float) l.x - (float) ray.hitCellX, l.y
 145                                 - (ray.hitCellY - (float) 1.5), (float) l.z
 146                                 - (float) ray.hitCellZ);
 147
 148                         final int rt1 = octreeVolume.traceCell(0, 0, 0,
 149                                 octreeVolume.masterCellSize, 0, r1);
 150
 151                         if (rt1 == -1) {
 152                             newRed = (l.color.r * l.brightness) / distance;
 153                             newGreen = (l.color.g * l.brightness) / distance;
 154                             newBlue = (l.color.b * l.brightness) / distance;
 155                         }
 156
 157                         final Ray r2 = new Ray(ray.hitCellX - (float) 1.5,
 158                                 ray.hitCellY, ray.hitCellZ,
 159
 160                                 l.x - (ray.hitCellX - (float) 1.5), (float) l.y
 161                                 - (float) ray.hitCellY, (float) l.z
 162                                 - (float) ray.hitCellZ);
 163
 164                         final int rt2 = octreeVolume.traceCell(0, 0, 0,
 165                                 octreeVolume.masterCellSize, 0, r2);
 166
 167                         if (rt2 == -1) {
 168                             tempRed = (l.color.r * l.brightness) / distance;
 169                             tempGreen = (l.color.g * l.brightness) / distance;
 170                             tempBlue = (l.color.b * l.brightness) / distance;
 171
 172                             if (tempRed > newRed)
 173                                 newRed = tempRed;
 174                             if (tempGreen > newGreen)
 175                                 newGreen = tempGreen;
 176                             if (tempBlue > newBlue)
 177                                 newBlue = tempBlue;
 178                         }
 179
 180                         final Ray r3 = new Ray(ray.hitCellX, ray.hitCellY,
 181                                 ray.hitCellZ - (float) 1.5,
 182
 183                                 (float) l.x - (float) ray.hitCellX, (float) l.y
 184                                 - (float) ray.hitCellY, l.z
 185                                 - (ray.hitCellZ - (float) 1.5));
 186
 187                         final int rt3 = octreeVolume.traceCell(0, 0, 0,
 188                                 octreeVolume.masterCellSize, 0, r3);
 189
 190                         if (rt3 == -1) {
 191                             tempRed = (l.color.r * l.brightness) / distance;
 192                             tempGreen = (l.color.g * l.brightness) / distance;
 193                             tempBlue = (l.color.b * l.brightness) / distance;
 194                             if (tempRed > newRed)
 195                                 newRed = tempRed;
 196                             if (tempGreen > newGreen)
 197                                 newGreen = tempGreen;
 198                             if (tempBlue > newBlue)
 199                                 newBlue = tempBlue;
 200                         }
 201
 202                         final Ray r4 = new Ray(ray.hitCellX, ray.hitCellY
 203                                 + (float) 1.5, ray.hitCellZ,
 204
 205                                 (float) l.x - (float) ray.hitCellX, l.y
 206                                 - (ray.hitCellY + (float) 1.5), (float) l.z
 207                                 - (float) ray.hitCellZ);
 208
 209                         final int rt4 = octreeVolume.traceCell(0, 0, 0,
 210                                 octreeVolume.masterCellSize, 0, r4);
 211
 212                         if (rt4 == -1) {
 213                             tempRed = (l.color.r * l.brightness) / distance;
 214                             tempGreen = (l.color.g * l.brightness) / distance;
 215                             tempBlue = (l.color.b * l.brightness) / distance;
 216                             if (tempRed > newRed)
 217                                 newRed = tempRed;
 218                             if (tempGreen > newGreen)
 219                                 newGreen = tempGreen;
 220                             if (tempBlue > newBlue)
 221                                 newBlue = tempBlue;
 222                         }
 223
 224                         final Ray r5 = new Ray(ray.hitCellX + (float) 1.5,
 225                                 ray.hitCellY, ray.hitCellZ,
 226
 227                                 l.x - (ray.hitCellX + (float) 1.5), (float) l.y
 228                                 - (float) ray.hitCellY, (float) l.z
 229                                 - (float) ray.hitCellZ);
 230
 231                         final int rt5 = octreeVolume.traceCell(0, 0, 0,
 232                                 octreeVolume.masterCellSize, 0, r5);
 233
 234                         if (rt5 == -1) {
 235                             tempRed = (l.color.r * l.brightness) / distance;
 236                             tempGreen = (l.color.g * l.brightness) / distance;
 237                             tempBlue = (l.color.b * l.brightness) / distance;
 238                             if (tempRed > newRed)
 239                                 newRed = tempRed;
 240                             if (tempGreen > newGreen)
 241                                 newGreen = tempGreen;
 242                             if (tempBlue > newBlue)
 243                                 newBlue = tempBlue;
 244                         }
 245
 246                         final Ray r6 = new Ray(ray.hitCellX, ray.hitCellY,
 247                                 ray.hitCellZ + (float) 1.5,
 248
 249                                 (float) l.x - (float) ray.hitCellX, (float) l.y
 250                                 - (float) ray.hitCellY, l.z
 251                                 - (ray.hitCellZ + (float) 1.5));
 252
 253                         final int rt6 = octreeVolume.traceCell(0, 0, 0,
 254                                 octreeVolume.masterCellSize, 0, r6);
 255
 256                         if (rt6 == -1) {
 257                             tempRed = (l.color.r * l.brightness) / distance;
 258                             tempGreen = (l.color.g * l.brightness) / distance;
 259                             tempBlue = (l.color.b * l.brightness) / distance;
 260                             if (tempRed > newRed)
 261                                 newRed = tempRed;
 262                             if (tempGreen > newGreen)
 263                                 newGreen = tempGreen;
 264                             if (tempBlue > newBlue)
 265                                 newBlue = tempBlue;
 266                         }
 267                         red += newRed;
 268                         green += newGreen;
 269                         blue += newBlue;
 270
 271                     }
 272
 273                     final int cellColor = octreeVolume.ce2[intersectingCell];
 274
 275                     red = (red * ((cellColor & 0xFF0000) >> 16)) / 255;
 276                     green = (green * ((cellColor & 0xFF00) >> 8)) / 255;
 277                     blue = (blue * (cellColor & 0xFF)) / 255;
 278
 279                     if (red > 255)
 280                         red = 255;
 281                     if (green > 255)
 282                         green = 255;
 283                     if (blue > 255)
 284                         blue = 255;
 285
 286                     octreeVolume.ce3[intersectingCell] = (((int) red) << 16)
 287                             + (((int) green) << 8) + ((int) blue);
 288
 289                 }
 290             if (octreeVolume.ce3[intersectingCell] == 0)
 291                 return octreeVolume.ce2[intersectingCell];
 292             return octreeVolume.ce3[intersectingCell];
 293         }
 294
 295         // return (200 << 16) + (200 << 8) + 255;
 296         return 0;
 297     }
 298
 299 }