public PhysicsRectangle(float x, float y, float w, float h, World world) {
super(x, y, world);
this.width = w;
this.height = h;
// Create collision rectangle
PolygonDef shapeDef = new PolygonDef();
// Make sure it has non-zero density, otherwise it will have 0 mass and be static
shapeDef.density = 0.1f;
shapeDef.setAsBox(getWidth() / 2, getHeight() / 2);
getBody().createShape(shapeDef);
// Set mass of body
getBody().setMassFromShapes();
}
@Override
public void create() {
{
PolygonDef sd = new PolygonDef();
sd.setAsBox(50.0f, 10.0f);
BodyDef bd = new BodyDef();
bd.position = new Vec2(0.0f, -10.0f);
m_world.createStaticBody(bd).createShape(sd);
}
{
PolygonDef sd = new PolygonDef();
float w = 4.0f;
float h = 0.25f;
sd.setAsBox(w, h);
sd.density = 1.0f;
sd.friction = 0.3f;
sd.restitution = 0.0f;
BodyDef bd = new BodyDef();
int numSlats = 8;
float lastCMX = 0.0f;
float eps = 0.14f;
for (int i = 0; i < numSlats; ++i) {
float newX = lastCMX + w - eps;
lastCMX = (i * lastCMX + newX) / (i + 1);
bd.position = new Vec2(newX, .25f + 2 * h * (numSlats - i - 1));
Body myBody = m_world.createDynamicBody(bd);
myBody.createShape(sd);
myBody.setMassFromShapes();
}
}
}
public void create() {
if (firstTime) {
setCamera(0f, 10f, 10f);
firstTime = false;
}
{
PolygonDef sd = new PolygonDef();
sd.setAsBox(50.0f, 10.0f, new Vec2(0.0f, -10.0f), 0.0f);
BodyDef bd = new BodyDef();
bd.position.set(0.0f, 0.0f);
Body ground = m_world.createStaticBody(bd);
ground.createShape(sd);
sd.setAsBox(0.1f, 10.0f, new Vec2(20.0f, 10.0f), 0.0f);
ground.createShape(sd);
}
float[] xs = {0.0f, -10.0f, -5.0f, 5.0f, 10.0f};
for (int j = 0; j < xs.length; ++j) {
PolygonDef sd = new PolygonDef();
sd.setAsBox(0.5f, 0.5f);
sd.density = 1.0f;
sd.friction = 0.3f;
for (int i = 0; i < 12; ++i) {
BodyDef bd = new BodyDef();
// For this test we are using continuous physics for all boxes.
// This is a stress test, you normally wouldn't do this for
// performance reasons.
bd.isBullet = true;
bd.allowSleep = true;
// float32 x = b2Random(-0.1f, 0.1f);
// float32 x = i % 2 == 0 ? -0.025f : 0.025f;
bd.position.set(xs[j] + parent.random(-.05f, .05f), 0.752f + 1.54f * i);
// bd.position.Set(xs[j], 2.51f + 4.02f * i);
Body body = m_world.createDynamicBody(bd);
body.createShape(sd);
body.setMassFromShapes();
}
}
}