/*******************************************************************************
* Copyright (c) 2013, Daniel Murphy
* 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.
*
* 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 HOLDER 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.
******************************************************************************/
/**
*.created at 3:31:07 PM Jan 14, 2011
*/
package org.jbox2d.testbed.tests;
import org.jbox2d.callbacks.RayCastCallback;
import org.jbox2d.collision.shapes.CircleShape;
import org.jbox2d.collision.shapes.EdgeShape;
import org.jbox2d.collision.shapes.PolygonShape;
import org.jbox2d.common.Color3f;
import org.jbox2d.common.MathUtils;
import org.jbox2d.common.Vec2;
import org.jbox2d.dynamics.Body;
import org.jbox2d.dynamics.BodyDef;
import org.jbox2d.dynamics.BodyType;
import org.jbox2d.dynamics.Fixture;
import org.jbox2d.dynamics.FixtureDef;
import org.jbox2d.testbed.framework.TestbedSettings;
import org.jbox2d.testbed.framework.TestbedTest;
/**
* @author Daniel Murphy
*/
public class EdgeShapes extends TestbedTest {
int e_maxBodies = 256;
int m_bodyIndex;
Body m_bodies[] = new Body[e_maxBodies];
PolygonShape m_polygons[] = new PolygonShape[4];
CircleShape m_circle;
float m_angle;
@Override
public void initTest(boolean argDeserialized) {
for (int i = 0; i < m_bodies.length; i++) {
m_bodies[i] = null;
}
// Ground body
{
BodyDef bd = new BodyDef();
Body ground = getWorld().createBody(bd);
float x1 = -20.0f;
float y1 = 2.0f * MathUtils.cos(x1 / 10.0f * MathUtils.PI);
for (int i = 0; i < 80; ++i) {
float x2 = x1 + 0.5f;
float y2 = 2.0f * MathUtils.cos(x2 / 10.0f * MathUtils.PI);
EdgeShape shape = new EdgeShape();
shape.set(new Vec2(x1, y1), new Vec2(x2, y2));
ground.createFixture(shape, 0.0f);
x1 = x2;
y1 = y2;
}
}
{
Vec2 vertices[] = new Vec2[3];
vertices[0] = new Vec2(-0.5f, 0.0f);
vertices[1] = new Vec2(0.5f, 0.0f);
vertices[2] = new Vec2(0.0f, 1.5f);
m_polygons[0] = new PolygonShape();
m_polygons[0].set(vertices, 3);
}
{
Vec2 vertices[] = new Vec2[3];
vertices[0] = new Vec2(-0.1f, 0.0f);
vertices[1] = new Vec2(0.1f, 0.0f);
vertices[2] = new Vec2(0.0f, 1.5f);
m_polygons[1] = new PolygonShape();
m_polygons[1].set(vertices, 3);
}
{
float w = 1.0f;
float b = w / (2.0f + MathUtils.sqrt(2.0f));
float s = MathUtils.sqrt(2.0f) * b;
Vec2 vertices[] = new Vec2[8];
vertices[0] = new Vec2(0.5f * s, 0.0f);
vertices[1] = new Vec2(0.5f * w, b);
vertices[2] = new Vec2(0.5f * w, b + s);
vertices[3] = new Vec2(0.5f * s, w);
vertices[4] = new Vec2(-0.5f * s, w);
vertices[5] = new Vec2(-0.5f * w, b + s);
vertices[6] = new Vec2(-0.5f * w, b);
vertices[7] = new Vec2(-0.5f * s, 0.0f);
m_polygons[2] = new PolygonShape();
m_polygons[2].set(vertices, 8);
}
{
m_polygons[3] = new PolygonShape();
m_polygons[3].setAsBox(0.5f, 0.5f);
}
{
m_circle = new CircleShape();
m_circle.m_radius = 0.5f;
}
m_bodyIndex = 0;
m_angle = 0.0f;
}
void Create(int index) {
if (m_bodies[m_bodyIndex] != null) {
getWorld().destroyBody(m_bodies[m_bodyIndex]);
m_bodies[m_bodyIndex] = null;
}
BodyDef bd = new BodyDef();
float x = MathUtils.randomFloat(-10.0f, 10.0f);
float y = MathUtils.randomFloat(10.0f, 20.0f);
bd.position.set(x, y);
bd.angle = MathUtils.randomFloat(-MathUtils.PI, MathUtils.PI);
bd.type = BodyType.DYNAMIC;
if (index == 4) {
bd.angularDamping = 0.02f;
}
m_bodies[m_bodyIndex] = getWorld().createBody(bd);
if (index < 4) {
FixtureDef fd = new FixtureDef();
fd.shape = m_polygons[index];
fd.friction = 0.3f;
fd.density = 20.0f;
m_bodies[m_bodyIndex].createFixture(fd);
} else {
FixtureDef fd = new FixtureDef();
fd.shape = m_circle;
fd.friction = 0.3f;
fd.density = 20.0f;
m_bodies[m_bodyIndex].createFixture(fd);
}
m_bodyIndex = (m_bodyIndex + 1) % e_maxBodies;
}
void DestroyBody() {
for (int i = 0; i < e_maxBodies; ++i) {
if (m_bodies[i] != null) {
getWorld().destroyBody(m_bodies[i]);
m_bodies[i] = null;
return;
}
}
}
@Override
public void keyPressed(char argKeyChar, int argKeyCode) {
switch (argKeyChar) {
case '1':
case '2':
case '3':
case '4':
case '5':
Create(argKeyChar - '1');
break;
case 'd':
DestroyBody();
break;
}
}
EdgeShapesCallback callback = new EdgeShapesCallback();
@Override
public void step(TestbedSettings settings) {
boolean advanceRay = settings.pause == false || settings.singleStep;
super.step(settings);
addTextLine("Press 1-5 to drop stuff");
float L = 25.0f;
Vec2 point1 = new Vec2(0.0f, 10.0f);
Vec2 d = new Vec2(L * MathUtils.cos(m_angle), -L * MathUtils.abs(MathUtils.sin(m_angle)));
Vec2 point2 = point1.add(d);
callback.m_fixture = null;
getWorld().raycast(callback, point1, point2);
if (callback.m_fixture != null) {
getDebugDraw().drawPoint(callback.m_point, 5.0f, new Color3f(0.4f, 0.9f, 0.4f));
getDebugDraw().drawSegment(point1, callback.m_point, new Color3f(0.8f, 0.8f, 0.8f));
Vec2 head = callback.m_normal.mul(.5f).addLocal(callback.m_point);
getDebugDraw().drawSegment(callback.m_point, head, new Color3f(0.9f, 0.9f, 0.4f));
} else {
getDebugDraw().drawSegment(point1, point2, new Color3f(0.8f, 0.8f, 0.8f));
}
if (advanceRay) {
m_angle += 0.25f * MathUtils.PI / 180.0f;
}
}
@Override
public String getTestName() {
return "Edge Shapes";
}
}
class EdgeShapesCallback implements RayCastCallback {
EdgeShapesCallback() {
m_fixture = null;
}
public float reportFixture(Fixture fixture, final Vec2 point, final Vec2 normal, float fraction) {
m_fixture = fixture;
m_point = point;
m_normal = normal;
return fraction;
}
Fixture m_fixture;
Vec2 m_point;
Vec2 m_normal;
};