src/main/java/eu/svjatoslav/sixth/e3d/examples/OctreeDemo.java

   1 /*
   2  * Sixth 3D engine demos. Author: Svjatoslav Agejenko.
   3  * This project is released under Creative Commons Zero (CC0) license.
   4  *
   5 */
   6
   7 package eu.svjatoslav.sixth.e3d.examples;
   8
   9 import eu.svjatoslav.sixth.e3d.geometry.Point3D;
  10 import eu.svjatoslav.sixth.e3d.gui.ViewFrame;
  11 import eu.svjatoslav.sixth.e3d.gui.ViewPanel;
  12 import eu.svjatoslav.sixth.e3d.gui.humaninput.WorldNavigationUserInputTracker;
  13 import eu.svjatoslav.sixth.e3d.math.Transform;
  14 import eu.svjatoslav.sixth.e3d.renderer.octree.IntegerPoint;
  15 import eu.svjatoslav.sixth.e3d.renderer.octree.OctreeVolume;
  16 import eu.svjatoslav.sixth.e3d.renderer.octree.raytracer.Camera;
  17 import eu.svjatoslav.sixth.e3d.renderer.octree.raytracer.LightSource;
  18 import eu.svjatoslav.sixth.e3d.renderer.octree.raytracer.RayTracer;
  19 import eu.svjatoslav.sixth.e3d.renderer.raster.Color;
  20 import eu.svjatoslav.sixth.e3d.renderer.raster.ShapeCollection;
  21 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.basic.GlowingPoint;
  22 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.basic.line.LineAppearance;
  23 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.composite.LightSourceMarker;
  24 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.composite.solid.SolidPolygonRectangularBox;
  25 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.composite.textcanvas.TextCanvas;
  26 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.composite.wireframe.Grid3D;
  27
  28 import java.awt.event.KeyEvent;
  29 import java.util.Vector;
  30
  31 public class OctreeDemo extends WorldNavigationUserInputTracker {
  32
  33     private static final double magnification = 5;
  34     private final LineAppearance gridAppearance = new LineAppearance(40, new Color(255,
  35             0, 0, 60));
  36     private final Vector<LightSource> lights = new Vector<>();
  37     private OctreeVolume octreeVolume;
  38     private ShapeCollection shapeCollection;
  39     private ViewPanel viewPanel;
  40
  41     public static void main(final String[] args) {
  42         new OctreeDemo().init();
  43     }
  44
  45     private void addLight(final Point3D location, final Color color,
  46                           final float brightness) {
  47         shapeCollection.addShape(new LightSourceMarker(new Point3D(location)
  48                 .scaleUp(magnification), color));
  49
  50         final LightSource lightSource = new LightSource(location, color,
  51                 brightness);
  52
  53         lights.add(lightSource);
  54     }
  55
  56     private void dotSpiral() {
  57         for (double i = 0; i < 20; i = i + .1) {
  58
  59             double w = 1;
  60             double h = 1;
  61
  62             final double x = Math.sin(i) * 20f * h;
  63             final double y = Math.cos(i) * 20f * w;
  64             final double c1 = (Math.cos(i * 3f) * 100) + 127;
  65             final double c2 = (Math.cos(i * 5.3332f) * 100f) + 127;
  66             final double c3 = (Math.cos(i * 1.342f) * 100f) + 127;
  67
  68             putPixel((int) x, (int) y, (int) (i * 4f), new Color((int) c1,
  69                     (int) c2, (int) c3, 255));
  70         }
  71     }
  72
  73     private void fractal(final int x, final int y, final int z, final int size,
  74                          final int step) {
  75         final double c1 = (Math.cos(y / 7f) * 100f) + 127;
  76         final double c2 = (Math.cos(x / 10f) * 100f) + 127;
  77         final double c3 = (Math.cos(z / 12f) * 100f) + 127;
  78
  79         putRect(
  80                 new IntegerPoint( x - size, y - size, z - size),
  81                 new IntegerPoint( x + size, y + size, z + size),
  82                 new Color((int) c1, (int) c2, (int) c3, 100));
  83
  84         if (size > 1) {
  85             fractal(x, y - (size * 3), z, size / 2, step + 1);
  86             fractal(x + (size * 3), y, z, size / 2, step + 1);
  87             fractal(x, y, z + (size * 3), size / 2, step + 1);
  88         }
  89     }
  90
  91     private void init() {
  92
  93         final ViewFrame viewFrame = new ViewFrame();
  94         viewPanel = viewFrame.getViewPanel();
  95
  96         viewPanel.getAvatar().setLocation(new Point3D(0, -30, -300));
  97
  98         octreeVolume = new OctreeVolume();
  99
 100         shapeCollection = viewPanel.getRootShapeCollection();
 101
 102         shapeCollection.addShape(new Grid3D(
 103                 new Point3D(-10000, -10000, -10000), new Point3D(10000, 10000,
 104                 10000), 4000, gridAppearance));
 105
 106         // yellow light
 107         addLight(new Point3D(20, -450, 240), new Color(255, 255, 255, 255), 100);
 108
 109         // red light
 110         addLight(new Point3D(-150, -116, 141), new Color(255, 0, 0, 255), 10);
 111
 112         dotSpiral();
 113
 114         // arbitrary rectangles
 115         putRect(new IntegerPoint(-10, -10, -10),
 116                 new IntegerPoint(10, 10, -20),
 117                 new Color(200, 255, 200, 100));
 118
 119         putRect(new IntegerPoint(-3, 0, -30),
 120                 new IntegerPoint( 12, 3, 300),
 121                 new Color(255, 200, 200, 100));
 122
 123         putRect(new IntegerPoint(-20, 20, -20),
 124                 new IntegerPoint(20, 80, 20),
 125                 new Color(255, 200, 255, 100));
 126
 127         tiledFloor();
 128
 129         fractal(-50, 20, 100, 32, 1);
 130
 131         final TextCanvas message = new TextCanvas(new Transform(new Point3D(
 132                 -10, 20, -180)), "Press \"r\" to raytrace current view",
 133                 Color.WHITE, Color.PURPLE);
 134         shapeCollection.addShape(message);
 135
 136         viewPanel.getKeyboardFocusStack().pushFocusOwner(this);
 137         viewPanel.repaintDuringNextViewUpdate();
 138     }
 139
 140     @Override
 141     public boolean keyPressed(final KeyEvent event, final ViewPanel viewPanel) {
 142
 143         if ('r' == event.getKeyChar()) {
 144             raytrace();
 145             return true;
 146         }
 147         return super.keyPressed(event, viewPanel);
 148     }
 149
 150     private void putPixel(final int x, final int y, final int z,
 151                           final Color color) {
 152         shapeCollection.addShape(new GlowingPoint(new Point3D(x, y, z)
 153                 .scaleUp(magnification), 3 * magnification, color));
 154         octreeVolume.putCell(x, y, z, color);
 155
 156     }
 157
 158     private void putRect(IntegerPoint p1, IntegerPoint p2, final Color color) {
 159
 160         shapeCollection
 161                 .addShape(new SolidPolygonRectangularBox(
 162                         new Point3D(p1).scaleUp(magnification),
 163                         new Point3D(p2).scaleUp(magnification), color));
 164
 165         octreeVolume.fillRectangle(p1, p2, color);
 166     }
 167
 168     private void raytrace() {
 169         // create and add camera object to scene
 170         final Camera camera = new Camera(viewPanel.getAvatar(), magnification);
 171         shapeCollection.addShape(camera);
 172
 173         // initialize and start Raytracer in a separate thread
 174         final RayTracer rayTracer = new RayTracer(camera.getTexture(),
 175                 octreeVolume, lights, camera, viewPanel);
 176         final Thread thread = new Thread(rayTracer);
 177         thread.start();
 178     }
 179
 180     private void tiledFloor() {
 181         final int step = 40;
 182         final int size = step - 15;
 183         Color color = new Color(255, 255, 255, 100);
 184         for (int x = -200; x < 200; x += step)
 185             for (int z = -200; z < 200; z += step)
 186                 putRect(
 187                         new IntegerPoint(x, 100, z),
 188                         new IntegerPoint(x + size, 110, z + size),
 189                         color);
 190     }
 191
 192 }