2 * Sixth 3D engine. Author: Svjatoslav Agejenko.
3 * This project is released under Creative Commons Zero (CC0) license.
8 package eu.svjatoslav.sixth.e3d.renderer.raster.slicer;
10 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.basic.texturedpolygon.TexturedPolygon;
12 import java.util.ArrayList;
13 import java.util.Arrays;
14 import java.util.List;
18 private final double maxDistance;
19 private final List<TexturedPolygon> result = new ArrayList<>();
21 public Slicer(final double maxDistance) {
22 this.maxDistance = maxDistance;
25 private void considerSlicing(final PolygonCoordinate c1,
26 final PolygonCoordinate c2, final PolygonCoordinate c3,
27 final TexturedPolygon originalPolygon) {
29 final BorderLine lines[] = new BorderLine[]{
30 new BorderLine(c1, c2, 1), new BorderLine(c2, c3, 2),
31 new BorderLine(c3, c1, 3)};
33 Arrays.sort(lines, lines[0]);
35 final BorderLine longestLine = lines[2];
37 if (longestLine.getLength() < maxDistance) {
38 final TexturedPolygon polygon = new TexturedPolygon(c1, c2, c3,
39 originalPolygon.texture);
41 polygon.setMouseInteractionController(originalPolygon.mouseInteractionController);
43 getResult().add(polygon);
47 final PolygonCoordinate middle = longestLine.getMiddlePoint();
49 switch (longestLine.count) {
51 considerSlicing(c1, middle, c3, originalPolygon);
52 considerSlicing(middle, c2, c3, originalPolygon);
55 considerSlicing(c1, c2, middle, originalPolygon);
56 considerSlicing(middle, c3, c1, originalPolygon);
59 considerSlicing(c1, c2, middle, originalPolygon);
60 considerSlicing(middle, c2, c3, originalPolygon);
65 public List<TexturedPolygon> getResult() {
69 public void slice(final TexturedPolygon originalPolygon) {
71 final PolygonCoordinate pc1 = new PolygonCoordinate(
72 originalPolygon.coordinates[0].coordinate,
73 originalPolygon.texturePoint1);
75 final PolygonCoordinate pc2 = new PolygonCoordinate(
76 originalPolygon.coordinates[1].coordinate,
77 originalPolygon.texturePoint2);
79 final PolygonCoordinate pc3 = new PolygonCoordinate(
80 originalPolygon.coordinates[2].coordinate,
81 originalPolygon.texturePoint3);
83 considerSlicing(pc1, pc2, pc3, originalPolygon);