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

   1 /*
   2  * Sixth - System for data storage, computation, exploration and interaction.
   3  * Copyright ©2012-2016, Svjatoslav Agejenko, svjatoslav@svjatoslav.eu
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of version 3 of the GNU Lesser General Public License
   7  * or later as published by the Free Software Foundation.
   8  */
   9
  10 package eu.svjatoslav.sixth.e3d.examples;
  11
  12 import eu.svjatoslav.sixth.e3d.geometry.Point3D;
  13 import eu.svjatoslav.sixth.e3d.gui.ViewContext;
  14 import eu.svjatoslav.sixth.e3d.gui.ViewFrame;
  15 import eu.svjatoslav.sixth.e3d.renderer.raster.Color;
  16 import eu.svjatoslav.sixth.e3d.renderer.raster.ShapeCollection;
  17 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.basic.line.LineAppearance;
  18 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.basic.solidpolygon.SolidPolygon;
  19 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.composite.wireframe.WireframeSphere;
  20
  21 public class SphereDemo {
  22
  23     private static final double WAVE_FREQUENCY = 50d;
  24     private static final double WAVE_AMPLITUDE = 50d;
  25     private static final Color SQUARE_PLATE_COLOR = new Color("88F7");
  26
  27     private static void makeSquarePlate(final ShapeCollection shapeCollection,
  28                                         final double y, final double x, final double z) {
  29         final Point3D p1 = new Point3D(x, y, z);
  30         final Point3D p2 = new Point3D(x + 20, y, z);
  31         final Point3D p3 = new Point3D(x, y, z + 20);
  32         final Point3D p4 = new Point3D(x + 20, y, z + 20);
  33         final SolidPolygon polygon1 = new SolidPolygon(p1, p2, p3, SQUARE_PLATE_COLOR);
  34         final SolidPolygon polygon2 = new SolidPolygon(p4, p2, p3, SQUARE_PLATE_COLOR);
  35         shapeCollection.addShape(polygon1);
  36         shapeCollection.addShape(polygon2);
  37     }
  38
  39     /**
  40      * @param surfaceElevation surface total elevation
  41      */
  42     private static void makeWobblySurface(final ShapeCollection shapeCollection,
  43                                           final double surfaceElevation) {
  44         for (double x = -500; x < 500; x += 20)
  45             for (double z = -500; z < 500; z += 20) {
  46
  47                 // use Pythagorean theorem to compute distance from the center
  48                 final double distanceFromCenter = Math.sqrt((x * x) + (z * z));
  49
  50                 double plateElevation = Math.sin(distanceFromCenter / WAVE_FREQUENCY) * WAVE_AMPLITUDE;
  51
  52                 makeSquarePlate(shapeCollection, plateElevation + surfaceElevation, x,
  53                         z);
  54             }
  55     }
  56
  57     public static void main(final String[] args) {
  58
  59         final ViewFrame viewFrame = new ViewFrame();
  60         final ViewContext context = viewFrame.getView().getContext();
  61
  62         final ShapeCollection geometryCollection = context
  63                 .getRootShapeCollection();
  64
  65         final LineAppearance appearance = new LineAppearance(4, new Color(255,
  66                 0, 0, 30));
  67
  68         // add sphere
  69         geometryCollection.addShape(new WireframeSphere(new Point3D(0, 0, 0),
  70                 100, appearance));
  71
  72         // create floor
  73         makeWobblySurface(geometryCollection, 200);
  74         makeWobblySurface(geometryCollection, -200);
  75
  76         context.getAvatar().setLocation(new Point3D(0, 0, -340));
  77
  78     }
  79 }