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

   1 /*
   2  * Sixth 3D engine demos. 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 package eu.svjatoslav.sixth.e3d.examples;
  10
  11 import eu.svjatoslav.sixth.e3d.geometry.Point3D;
  12 import eu.svjatoslav.sixth.e3d.gui.ViewFrame;
  13 import eu.svjatoslav.sixth.e3d.renderer.raster.Color;
  14 import eu.svjatoslav.sixth.e3d.renderer.raster.ShapeCollection;
  15 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.basic.line.LineAppearance;
  16 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.basic.solidpolygon.SolidPolygon;
  17 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.composite.wireframe.Grid3D;
  18
  19 public class RandomPolygonsDemo {
  20
  21     private static final double POLYGON_AVERAGE_SIZE = 130;
  22     private static final int POLYGON_COUNT = 1000;
  23
  24     private static void addRandomPolygon(final ShapeCollection geometryCollection) {
  25         final Point3D polygonLocation = getRandomPoint(1000);
  26
  27         final Point3D point1 = new Point3D(polygonLocation);
  28         point1.add(getRandomPoint(POLYGON_AVERAGE_SIZE));
  29
  30         final Point3D point2 = new Point3D(polygonLocation);
  31         point2.add(getRandomPoint(POLYGON_AVERAGE_SIZE));
  32
  33         final Point3D point3 = new Point3D(polygonLocation);
  34         point3.add(getRandomPoint(POLYGON_AVERAGE_SIZE));
  35
  36         final Color color = new Color(
  37                 getColorChannelBrightness(),
  38                 getColorChannelBrightness(),
  39                 getColorChannelBrightness(),
  40                 1);
  41
  42         final SolidPolygon polygon = new SolidPolygon(point1, point2, point3,
  43                 color);
  44         geometryCollection.addShape(polygon);
  45     }
  46
  47     /* I don't want very dark polygons, so ensure there is at least some
  48       * brightness present. */
  49     private static double getColorChannelBrightness() {
  50         return Math.random() * 0.7 + 0.3f;
  51     }
  52
  53     private static Point3D getRandomPoint(final double amplitude) {
  54         return new Point3D((Math.random() * amplitude * 2d) - amplitude,
  55                 (Math.random() * amplitude * 2d) - amplitude, (Math.random()
  56                 * amplitude * 2d)
  57                 - amplitude);
  58     }
  59
  60     public static void main(final String[] args) {
  61
  62         final ViewFrame viewFrame = new ViewFrame();
  63
  64         final ShapeCollection shapeCollection = viewFrame.getView()
  65                 .getContext().getRootShapeCollection();
  66
  67         // add grid
  68         final LineAppearance appearance = new LineAppearance(5, new Color(100,
  69                 100, 255, 60));
  70
  71         shapeCollection.addShape(new Grid3D(new Point3D(1000, -1000, -1000),
  72                 new Point3D(-1000, 1000, 1000), 300, appearance));
  73
  74         // add random polygons
  75         for (int i = 0; i < POLYGON_COUNT; i++)
  76             addRandomPolygon(shapeCollection);
  77
  78     }
  79 }