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         // System.out.println("Raytracing done.");
 111         // System.out.println("New lights computed:" + computedLights);
 112     }
 113
 114     public int traceLight(final LightSource l, final int cubeX,
 115                           final int cubeY, final int cubeZ) {
 116         return 0;
 117     }
 118
 119     public int traceRay(final Ray r) {
 120
 121         final int re = octreeVolume.traceCell(0, 0, 0,
 122                 octreeVolume.masterCellSize, 0, r);
 123
 124         if (re != -1) {
 125             // if lightening not computed, compute it
 126             if (octreeVolume.ce3[re] == -1)
 127                 // if cell is larger than 1
 128                 if (r.hitCellSize > 1) {
 129                     // break it up
 130                     octreeVolume.breakSolidCell(re);
 131                     return traceRay(r);
 132                 } else {
 133                     computedLights++;
 134                     float red = 30, green = 30, blue = 30;
 135
 136                     for (final LightSource l : lights) {
 137                         final int xDist = (l.x - r.hitCellX);
 138                         final int yDist = (l.y - r.hitCellY);
 139                         final int zDist = (l.z - r.hitCellZ);
 140
 141                         double newRed = 0, newGreen = 0, newBlue = 0;
 142                         double tempRed, tempGreen, tempBlue;
 143
 144                         double distance = Math.sqrt((xDist * xDist)
 145                                 + (yDist * yDist) + (zDist * zDist));
 146                         distance = (distance / 3) + 1;
 147
 148                         final Ray r1 = new Ray(r.hitCellX, r.hitCellY
 149                                 - (float) 1.5, r.hitCellZ,
 150
 151                                 (float) l.x - (float) r.hitCellX, l.y
 152                                 - (r.hitCellY - (float) 1.5), (float) l.z
 153                                 - (float) r.hitCellZ);
 154
 155                         final int rt1 = octreeVolume.traceCell(0, 0, 0,
 156                                 octreeVolume.masterCellSize, 0, r1);
 157
 158                         if (rt1 == -1) {
 159                             newRed = (l.color.r * l.brightness) / distance;
 160                             newGreen = (l.color.g * l.brightness) / distance;
 161                             newBlue = (l.color.b * l.brightness) / distance;
 162                         }
 163
 164                         final Ray r2 = new Ray(r.hitCellX - (float) 1.5,
 165                                 r.hitCellY, r.hitCellZ,
 166
 167                                 l.x - (r.hitCellX - (float) 1.5), (float) l.y
 168                                 - (float) r.hitCellY, (float) l.z
 169                                 - (float) r.hitCellZ);
 170
 171                         final int rt2 = octreeVolume.traceCell(0, 0, 0,
 172                                 octreeVolume.masterCellSize, 0, r2);
 173
 174                         if (rt2 == -1) {
 175                             tempRed = (l.color.r * l.brightness) / distance;
 176                             tempGreen = (l.color.g * l.brightness) / distance;
 177                             tempBlue = (l.color.b * l.brightness) / distance;
 178
 179                             if (tempRed > newRed)
 180                                 newRed = tempRed;
 181                             if (tempGreen > newGreen)
 182                                 newGreen = tempGreen;
 183                             if (tempBlue > newBlue)
 184                                 newBlue = tempBlue;
 185                         }
 186
 187                         final Ray r3 = new Ray(r.hitCellX, r.hitCellY,
 188                                 r.hitCellZ - (float) 1.5,
 189
 190                                 (float) l.x - (float) r.hitCellX, (float) l.y
 191                                 - (float) r.hitCellY, l.z
 192                                 - (r.hitCellZ - (float) 1.5));
 193
 194                         final int rt3 = octreeVolume.traceCell(0, 0, 0,
 195                                 octreeVolume.masterCellSize, 0, r3);
 196
 197                         if (rt3 == -1) {
 198                             tempRed = (l.color.r * l.brightness) / distance;
 199                             tempGreen = (l.color.g * l.brightness) / distance;
 200                             tempBlue = (l.color.b * l.brightness) / distance;
 201                             if (tempRed > newRed)
 202                                 newRed = tempRed;
 203                             if (tempGreen > newGreen)
 204                                 newGreen = tempGreen;
 205                             if (tempBlue > newBlue)
 206                                 newBlue = tempBlue;
 207                         }
 208
 209                         final Ray r4 = new Ray(r.hitCellX, r.hitCellY
 210                                 + (float) 1.5, r.hitCellZ,
 211
 212                                 (float) l.x - (float) r.hitCellX, l.y
 213                                 - (r.hitCellY + (float) 1.5), (float) l.z
 214                                 - (float) r.hitCellZ);
 215
 216                         final int rt4 = octreeVolume.traceCell(0, 0, 0,
 217                                 octreeVolume.masterCellSize, 0, r4);
 218
 219                         if (rt4 == -1) {
 220                             tempRed = (l.color.r * l.brightness) / distance;
 221                             tempGreen = (l.color.g * l.brightness) / distance;
 222                             tempBlue = (l.color.b * l.brightness) / distance;
 223                             if (tempRed > newRed)
 224                                 newRed = tempRed;
 225                             if (tempGreen > newGreen)
 226                                 newGreen = tempGreen;
 227                             if (tempBlue > newBlue)
 228                                 newBlue = tempBlue;
 229                         }
 230
 231                         final Ray r5 = new Ray(r.hitCellX + (float) 1.5,
 232                                 r.hitCellY, r.hitCellZ,
 233
 234                                 l.x - (r.hitCellX + (float) 1.5), (float) l.y
 235                                 - (float) r.hitCellY, (float) l.z
 236                                 - (float) r.hitCellZ);
 237
 238                         final int rt5 = octreeVolume.traceCell(0, 0, 0,
 239                                 octreeVolume.masterCellSize, 0, r5);
 240
 241                         if (rt5 == -1) {
 242                             tempRed = (l.color.r * l.brightness) / distance;
 243                             tempGreen = (l.color.g * l.brightness) / distance;
 244                             tempBlue = (l.color.b * l.brightness) / distance;
 245                             if (tempRed > newRed)
 246                                 newRed = tempRed;
 247                             if (tempGreen > newGreen)
 248                                 newGreen = tempGreen;
 249                             if (tempBlue > newBlue)
 250                                 newBlue = tempBlue;
 251                         }
 252
 253                         final Ray r6 = new Ray(r.hitCellX, r.hitCellY,
 254                                 r.hitCellZ + (float) 1.5,
 255
 256                                 (float) l.x - (float) r.hitCellX, (float) l.y
 257                                 - (float) r.hitCellY, l.z
 258                                 - (r.hitCellZ + (float) 1.5));
 259
 260                         final int rt6 = octreeVolume.traceCell(0, 0, 0,
 261                                 octreeVolume.masterCellSize, 0, r6);
 262
 263                         if (rt6 == -1) {
 264                             tempRed = (l.color.r * l.brightness) / distance;
 265                             tempGreen = (l.color.g * l.brightness) / distance;
 266                             tempBlue = (l.color.b * l.brightness) / distance;
 267                             if (tempRed > newRed)
 268                                 newRed = tempRed;
 269                             if (tempGreen > newGreen)
 270                                 newGreen = tempGreen;
 271                             if (tempBlue > newBlue)
 272                                 newBlue = tempBlue;
 273                         }
 274                         red += newRed;
 275                         green += newGreen;
 276                         blue += newBlue;
 277
 278                     }
 279
 280                     final int cellColor = octreeVolume.ce2[re];
 281
 282                     red = (red * ((cellColor & 0xFF0000) >> 16)) / 255;
 283                     green = (green * ((cellColor & 0xFF00) >> 8)) / 255;
 284                     blue = (blue * (cellColor & 0xFF)) / 255;
 285
 286                     if (red > 255)
 287                         red = 255;
 288                     if (green > 255)
 289                         green = 255;
 290                     if (blue > 255)
 291                         blue = 255;
 292
 293                     octreeVolume.ce3[re] = (((int) red) << 16)
 294                             + (((int) green) << 8) + ((int) blue);
 295
 296                 }
 297             if (octreeVolume.ce3[re] == 0)
 298                 return octreeVolume.ce2[re];
 299             return octreeVolume.ce3[re];
 300         }
 301
 302         // return (200 << 16) + (200 << 8) + 255;
 303         return 0;
 304     }
 305
 306 }