2 * Sixth 3D engine demos. Author: Svjatoslav Agejenko.
3 * This project is released under Creative Commons Zero (CC0) license.
7 package eu.svjatoslav.sixth.e3d.examples;
9 import eu.svjatoslav.sixth.e3d.geometry.Point2D;
10 import eu.svjatoslav.sixth.e3d.geometry.Point3D;
11 import eu.svjatoslav.sixth.e3d.gui.ViewFrame;
12 import eu.svjatoslav.sixth.e3d.renderer.raster.Color;
13 import eu.svjatoslav.sixth.e3d.renderer.raster.ShapeCollection;
14 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.basic.line.LineAppearance;
15 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.basic.solidpolygon.SolidPolygon;
16 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.composite.Graph;
17 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.composite.wireframe.WireframeSphere;
19 import java.io.IOException;
20 import java.util.ArrayList;
21 import java.util.List;
23 public class GraphDemo {
25 private static final double WAVE_FREQUENCY = 50d;
26 private static final double WAVE_AMPLITUDE = 50d;
27 private static final Color SQUARE_PLATE_COLOR = new Color("88F7");
29 private static void makeSquarePlate(final ShapeCollection shapeCollection,
30 final double y, final double x, final double z) {
31 final Point3D p1 = new Point3D(x, y, z);
32 final Point3D p2 = new Point3D(x + 20, y, z);
33 final Point3D p3 = new Point3D(x, y, z + 20);
34 final Point3D p4 = new Point3D(x + 20, y, z + 20);
35 final SolidPolygon polygon1 = new SolidPolygon(p1, p2, p3, SQUARE_PLATE_COLOR);
36 final SolidPolygon polygon2 = new SolidPolygon(p4, p2, p3, SQUARE_PLATE_COLOR);
37 shapeCollection.addShape(polygon1);
38 shapeCollection.addShape(polygon2);
42 * @param surfaceElevation surface total elevation
44 private static void addWobblySurface(final ShapeCollection shapeCollection,
45 final double surfaceElevation) {
46 for (double x = -500; x < 500; x += 20)
47 for (double z = -500; z < 500; z += 20) {
49 // use Pythagorean theorem to compute distance from the center
50 final double distanceFromCenter = Math.sqrt((x * x) + (z * z));
52 double plateElevation = Math.sin(distanceFromCenter / WAVE_FREQUENCY) * WAVE_AMPLITUDE;
54 makeSquarePlate(shapeCollection, plateElevation + surfaceElevation, x,
59 private static final double scale = 50d;
61 private static Graph getCosineGraph(final Point3D location) {
62 final List<Point2D> data = new ArrayList<>();
63 for (double x = 0; x < 20; x += 0.25) {
64 final double y = Math.cos(x);
66 final Point2D p = new Point2D(x, y);
70 return new Graph(scale, data, "Cosine", location);
73 private static Graph getFormula1Graph(final Point3D location) {
74 final List<Point2D> data = new ArrayList<>();
75 for (double x = 0; x < 20; x += 0.25) {
76 final double y = Math.sin(Math.tan(x));
78 final Point2D p = new Point2D(x, y);
82 return new Graph(scale, data, "y = sin(tan(x))", location);
85 private static Graph getFormula2Graph(final Point3D location) {
86 final List<Point2D> data = new ArrayList<>();
87 for (double x = 0; x < 20; x += 0.25) {
88 final double y = (Math.pow((10 - x), 2) / 30) - 2;
90 final Point2D p = new Point2D(x, y);
94 return new Graph(scale, data, "y = ( (10-x)^2 ) / 30", location);
97 private static Graph getFormula3Graph(final Point3D location) {
98 final List<Point2D> data = new ArrayList<>();
99 for (double x = 0; x < 20; x += 0.25) {
100 final double y = Math.sin(x / 2) + Math.sin(x / 1.26);
102 final Point2D p = new Point2D(x, y);
106 return new Graph(scale, data, "y = sin(x/2) + sin(x/1.26)", location);
109 private static Graph getSineGraph(final Point3D location) {
110 final List<Point2D> data = new ArrayList<>();
111 for (double x = 0; x < 20; x += 0.25) {
112 final double y = Math.sin(x);
114 final Point2D p = new Point2D(x, y);
118 return new Graph(scale, data, "Sine", location);
121 private static Graph getTangentGraph(final Point3D location) {
122 final List<Point2D> data = new ArrayList<>();
123 for (double x = 0; x < 20; x += 0.25) {
124 double y = Math.tan(x);
131 final Point2D p = new Point2D(x, y);
135 return new Graph(scale, data, "Tangent", location);
138 public static void main(final String[] args) throws IOException {
140 final ViewFrame viewFrame = new ViewFrame();
141 final ShapeCollection geometryCollection = viewFrame.getViewPanel()
142 .getRootShapeCollection();
144 addMathFormulas(geometryCollection);
145 addSphere(geometryCollection);
146 addWobblySurface(geometryCollection, 200);
147 addWobblySurface(geometryCollection, -200);
149 setAvatarLocation(viewFrame);
152 private static void addSphere(ShapeCollection geometryCollection) {
154 geometryCollection.addShape(new WireframeSphere(new Point3D(0, 0, 0),
158 new Color(255,0, 0, 30))
162 private static void addMathFormulas(ShapeCollection geometryCollection) {
164 Point3D location = new Point3D(-600, -300, z);
165 geometryCollection.addShape(getSineGraph(location));
167 location = new Point3D(600, -300, z);
168 geometryCollection.addShape(getFormula1Graph(location));
170 location = new Point3D(-600, 0, z);
171 geometryCollection.addShape(getCosineGraph(location));
173 location = new Point3D(600, 0, z);
174 geometryCollection.addShape(getFormula2Graph(location));
176 location = new Point3D(-600, 300, z);
177 geometryCollection.addShape(getTangentGraph(location));
179 location = new Point3D(600, 300, z);
180 geometryCollection.addShape(getFormula3Graph(location));
183 private static void setAvatarLocation(ViewFrame viewFrame) {
184 viewFrame.getViewPanel().getAvatar()
185 .setLocation(new Point3D(0, 0, -500));