src/main/java/eu/svjatoslav/sixth/e3d/examples/SphereDemo.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.renderer.raster.Color;
  13 import eu.svjatoslav.sixth.e3d.renderer.raster.ShapeCollection;
  14 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.basic.line.LineAppearance;
  15 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.basic.solidpolygon.SolidPolygon;
  16 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.composite.wireframe.WireframeSphere;
  17
  18 public class SphereDemo {
  19
  20     private static final double WAVE_FREQUENCY = 50d;
  21     private static final double WAVE_AMPLITUDE = 50d;
  22     private static final Color SQUARE_PLATE_COLOR = new Color("88F7");
  23
  24     private static void makeSquarePlate(final ShapeCollection shapeCollection,
  25                                         final double y, final double x, final double z) {
  26         final Point3D p1 = new Point3D(x, y, z);
  27         final Point3D p2 = new Point3D(x + 20, y, z);
  28         final Point3D p3 = new Point3D(x, y, z + 20);
  29         final Point3D p4 = new Point3D(x + 20, y, z + 20);
  30         final SolidPolygon polygon1 = new SolidPolygon(p1, p2, p3, SQUARE_PLATE_COLOR);
  31         final SolidPolygon polygon2 = new SolidPolygon(p4, p2, p3, SQUARE_PLATE_COLOR);
  32         shapeCollection.addShape(polygon1);
  33         shapeCollection.addShape(polygon2);
  34     }
  35
  36     /**
  37      * @param surfaceElevation surface total elevation
  38      */
  39     private static void makeWobblySurface(final ShapeCollection shapeCollection,
  40                                           final double surfaceElevation) {
  41         for (double x = -500; x < 500; x += 20)
  42             for (double z = -500; z < 500; z += 20) {
  43
  44                 // use Pythagorean theorem to compute distance from the center
  45                 final double distanceFromCenter = Math.sqrt((x * x) + (z * z));
  46
  47                 double plateElevation = Math.sin(distanceFromCenter / WAVE_FREQUENCY) * WAVE_AMPLITUDE;
  48
  49                 makeSquarePlate(shapeCollection, plateElevation + surfaceElevation, x,
  50                         z);
  51             }
  52     }
  53
  54     public static void main(final String[] args) {
  55
  56         final ViewFrame viewFrame = new ViewFrame();
  57         final ViewPanel viewPanel = viewFrame.getViewPanel();
  58
  59         final ShapeCollection geometryCollection = viewPanel
  60                 .getRootShapeCollection();
  61
  62         final LineAppearance appearance = new LineAppearance(4, new Color(255,
  63                 0, 0, 30));
  64
  65         // add sphere
  66         geometryCollection.addShape(new WireframeSphere(new Point3D(0, 0, 0),
  67                 100, appearance));
  68
  69         // create floor
  70         makeWobblySurface(geometryCollection, 200);
  71         makeWobblySurface(geometryCollection, -200);
  72
  73         viewPanel.getAvatar().setLocation(new Point3D(0, 0, -340));
  74
  75     }
  76 }