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   1 /*
   2  * Sixth 3D engine. Author: Svjatoslav Agejenko.
   3  * This project is released under Creative Commons Zero (CC0) license.
   4  */
   5 package eu.svjatoslav.sixth.e3d.renderer.raster.shapes.composite.wireframe;
   6
   7 import eu.svjatoslav.sixth.e3d.geometry.Point3D;
   8 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.basic.line.LineAppearance;
   9 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.composite.base.AbstractCompositeShape;
  10
  11 import java.util.ArrayList;
  12
  13 public class WireframeSphere extends AbstractCompositeShape {
  14
  15     ArrayList<Point3D> previousRing = new ArrayList<>();
  16
  17     public WireframeSphere(final Point3D location, final float radius,
  18                            final LineAppearance lineFactory) {
  19         super(location);
  20
  21         final double step = Math.PI / 10;
  22
  23         final Point3D center = new Point3D();
  24
  25         int ringIndex = 0;
  26
  27         for (double j = 0d; j <= (Math.PI * 2); j += step) {
  28
  29             Point3D oldPoint = null;
  30             int pointIndex = 0;
  31
  32             for (double i = 0; i <= (Math.PI * 2); i += step) {
  33                 final Point3D newPoint = new Point3D(0, 0, radius);
  34                 newPoint.rotate(center, i, j);
  35
  36                 if (oldPoint != null)
  37                     addShape(lineFactory.getLine(newPoint, oldPoint));
  38
  39                 if (ringIndex > 0) {
  40                     final Point3D previousRingPoint = previousRing
  41                             .get(pointIndex);
  42                     addShape(lineFactory.getLine(newPoint, previousRingPoint));
  43
  44                     previousRing.set(pointIndex, newPoint);
  45                 } else
  46                     previousRing.add(newPoint);
  47
  48                 oldPoint = newPoint;
  49                 pointIndex++;
  50             }
  51
  52             ringIndex++;
  53         }
  54
  55     }
  56
  57 }