SphereDemo.java

   1 /*
   2  * Sixth 3D engine demos. Copyright ©2012-2016, 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.ViewContext;
  13 import eu.svjatoslav.sixth.e3d.gui.ViewFrame;
  14 import eu.svjatoslav.sixth.e3d.renderer.raster.Color;
  15 import eu.svjatoslav.sixth.e3d.renderer.raster.ShapeCollection;
  16 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.basic.line.LineAppearance;
  17 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.basic.solidpolygon.SolidPolygon;
  18 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.composite.wireframe.WireframeSphere;
  19
  20 public class SphereDemo {
  21
  22     private static final double WAVE_FREQUENCY = 50d;
  23     private static final double WAVE_AMPLITUDE = 50d;
  24     private static final Color SQUARE_PLATE_COLOR = new Color("88F7");
  25
  26     private static void makeSquarePlate(final ShapeCollection shapeCollection,
  27                                         final double y, final double x, final double z) {
  28         final Point3D p1 = new Point3D(x, y, z);
  29         final Point3D p2 = new Point3D(x + 20, y, z);
  30         final Point3D p3 = new Point3D(x, y, z + 20);
  31         final Point3D p4 = new Point3D(x + 20, y, z + 20);
  32         final SolidPolygon polygon1 = new SolidPolygon(p1, p2, p3, SQUARE_PLATE_COLOR);
  33         final SolidPolygon polygon2 = new SolidPolygon(p4, p2, p3, SQUARE_PLATE_COLOR);
  34         shapeCollection.addShape(polygon1);
  35         shapeCollection.addShape(polygon2);
  36     }
  37
  38     /**
  39      * @param surfaceElevation surface total elevation
  40      */
  41     private static void makeWobblySurface(final ShapeCollection shapeCollection,
  42                                           final double surfaceElevation) {
  43         for (double x = -500; x < 500; x += 20)
  44             for (double z = -500; z < 500; z += 20) {
  45
  46                 // use Pythagorean theorem to compute distance from the center
  47                 final double distanceFromCenter = Math.sqrt((x * x) + (z * z));
  48
  49                 double plateElevation = Math.sin(distanceFromCenter / WAVE_FREQUENCY) * WAVE_AMPLITUDE;
  50
  51                 makeSquarePlate(shapeCollection, plateElevation + surfaceElevation, x,
  52                         z);
  53             }
  54     }
  55
  56     public static void main(final String[] args) {
  57
  58         final ViewFrame viewFrame = new ViewFrame();
  59         final ViewContext context = viewFrame.getView().getContext();
  60
  61         final ShapeCollection geometryCollection = context
  62                 .getRootShapeCollection();
  63
  64         final LineAppearance appearance = new LineAppearance(4, new Color(255,
  65                 0, 0, 30));
  66
  67         // add sphere
  68         geometryCollection.addShape(new WireframeSphere(new Point3D(0, 0, 0),
  69                 100, appearance));
  70
  71         // create floor
  72         makeWobblySurface(geometryCollection, 200);
  73         makeWobblySurface(geometryCollection, -200);
  74
  75         context.getAvatar().setLocation(new Point3D(0, 0, -340));
  76
  77     }
  78 }