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   1 /*
   2  * Sixth 3D engine. Copyright ©2012-2020, 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
  10 package eu.svjatoslav.sixth.e3d.renderer.raster.shapes.composite.wireframe;
  11
  12 import eu.svjatoslav.sixth.e3d.geometry.Point3D;
  13 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.basic.line.LineAppearance;
  14 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.composite.base.AbstractCompositeShape;
  15
  16 import java.util.ArrayList;
  17
  18 public class WireframeSphere extends AbstractCompositeShape {
  19
  20     ArrayList<Point3D> previousRing = new ArrayList<>();
  21
  22     public WireframeSphere(final Point3D location, final float radius,
  23                            final LineAppearance lineFactory) {
  24         super(location);
  25
  26         final double step = Math.PI / 10;
  27
  28         final Point3D center = new Point3D();
  29
  30         int ringIndex = 0;
  31
  32         for (double j = 0d; j <= (Math.PI * 2); j += step) {
  33
  34             Point3D oldPoint = null;
  35             int pointIndex = 0;
  36
  37             for (double i = 0; i <= (Math.PI * 2); i += step) {
  38                 final Point3D newPoint = new Point3D(0, 0, radius);
  39                 newPoint.rotate(center, i, j);
  40
  41                 if (oldPoint != null)
  42                     addShape(lineFactory.getLine(newPoint, oldPoint));
  43
  44                 if (ringIndex > 0) {
  45                     final Point3D previousRingPoint = previousRing
  46                             .get(pointIndex);
  47                     addShape(lineFactory.getLine(newPoint, previousRingPoint));
  48
  49                     previousRing.set(pointIndex, newPoint);
  50                 } else
  51                     previousRing.add(newPoint);
  52
  53                 oldPoint = newPoint;
  54                 pointIndex++;
  55             }
  56
  57             ringIndex++;
  58         }
  59
  60     }
  61
  62 }