/*
* Phys2D - a 2D physics engine based on the work of Erin Catto.
*
* This source is provided under the terms of the BSD License.
*
* Copyright (c) 2006, Phys2D
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of the Phys2D/New Dawn Software nor the names of
* its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*/
package net.phys2d.raw.test;
import net.phys2d.math.Vector2f;
import net.phys2d.raw.BasicJoint;
import net.phys2d.raw.Body;
import net.phys2d.raw.StaticBody;
import net.phys2d.raw.World;
import net.phys2d.raw.shapes.ConvexPolygon;
import net.phys2d.raw.shapes.Polygon;
/**
* A demo showing gears inteacting in a most un-believeable way
*
* @author gideon
*/
public class GearDemo extends AbstractDemo {
/** A wheel dropped into the scene */
private Body wheel;
/**
* Create a new gears demo instance
*/
public GearDemo() {
super("Gears Demo");
}
/**
* @see net.phys2d.raw.test.AbstractDemo#init(net.phys2d.raw.World)
*/
protected void init(World world) {
Vector2f[] groundVerts = {new Vector2f(-200, -10), new Vector2f(200,-10), new Vector2f(200,10), new Vector2f(-200,10)};
ConvexPolygon groundBox = new ConvexPolygon(groundVerts);
Body ground = new StaticBody("ground", groundBox);
ground.setPosition(250, 50);
world.add(ground);
{
int noVerts = 40;
Vector2f[] circleVerts = new Vector2f[noVerts];
float[] radius = {50,42,42,50};
for( int i = 0; i < noVerts; i++ ) {
float angle = (float) (i* 2 * Math.PI/noVerts);
circleVerts[i] = new Vector2f(
(float) (Math.cos(angle) * radius[i%radius.length]),
(float) (Math.sin(angle) * radius[i%radius.length]));
}
Polygon circlePolygon = new Polygon(circleVerts);
Body circle = new Body("circle", circlePolygon, 2);
circle.setPosition(250, 150);
world.add(circle);
BasicJoint joint = new BasicJoint(ground, circle, new Vector2f(circle.getPosition()));
world.add(joint);
}
{
int outerCircleVerts = 30;
int noVerts = 120;
Vector2f[] circleVerts = new Vector2f[outerCircleVerts+1 + noVerts+1];
for( int i = 0; i <= outerCircleVerts; i++ ) {
float angle = (float) (i* 2 * Math.PI/outerCircleVerts);
circleVerts[i] = new Vector2f(
(float) (Math.cos(angle) * 150),
(float) (Math.sin(angle) * 150));
}
float[] radius = {140, 133, 133, 140};
for( int i = 0; i <= noVerts; i++ ) {
float angle = (float) (i* 2 * Math.PI/noVerts);
circleVerts[outerCircleVerts+1 + noVerts-i] = new Vector2f(
(float) (Math.cos(angle) * radius[i%radius.length]),
(float) (Math.sin(angle) * radius[i%radius.length]));
}
Polygon circlePolygon = new Polygon(circleVerts);
Body circle = new Body("circle", circlePolygon, 30);
circle.setPosition(250, 220);
world.add(circle);
}
{
int noVerts = 20;
Vector2f[] circleVerts = new Vector2f[noVerts];
float[] radius = {30,20,20,30};
for( int i = 0; i < noVerts; i++ ) {
float angle = (float) (i* 2 * Math.PI/noVerts);
circleVerts[i] = new Vector2f(
(float) (Math.cos(angle) * radius[i%radius.length]),
(float) (Math.sin(angle) * radius[i%radius.length]));
}
Polygon circlePolygon = new Polygon(circleVerts);
Body circle = new Body("circle", circlePolygon, 2);
circle.setPosition(250, 300);
world.add(circle);
Vector2f[] nonConvexPoly = {new Vector2f(-20,-10), new Vector2f(20,-10), new Vector2f(10,0), new Vector2f(20,10), new Vector2f(-20,10), new Vector2f(-10,0)};
Polygon poly = new Polygon(nonConvexPoly);
Body nonConvexBody = new Body("poly", poly, 25);
nonConvexBody.setPosition(250, 400);
world.add(nonConvexBody);
BasicJoint joint = new BasicJoint(circle,nonConvexBody, new Vector2f(circle.getPosition()));
world.add(joint);
wheel = circle;
circle.setRotDamping(10);
}
}
/**
* @see net.phys2d.raw.test.AbstractDemo#update()
*/
protected void update() {
wheel.setTorque(20000);
}
/**
* Entry point to run this test stand alone
*
* @param argv The arguments passed into the demo
*/
public static void main(String[] argv) {
GearDemo demo = new GearDemo();
demo.start();
}
}