public static void createBody(World world, SceneElement e, ValueMap valueMap) {
float x = valueMap.getValue(e, SceneElement.VAR_X, 0f) / WORLD_SCALE;
float y = valueMap.getValue(e, SceneElement.VAR_Y, 0f) / WORLD_SCALE;
float width = valueMap.getValue(e, SceneElement.VAR_WIDTH, 1) / WORLD_SCALE;
float height = valueMap.getValue(e, SceneElement.VAR_HEIGHT, 1) / WORLD_SCALE;
// TODO what if corner is not center?
PhType phType = valueMap.getValue(e, PhysicsEf.VAR_PH_TYPE, PhType.DYNAMIC);
PhShape phShape = valueMap.getValue(e, PhysicsEf.VAR_PH_SHAPE, PhShape.RECTANGULAR);
Shape s = null;
switch (phShape) {
case CIRCULAR:
s = new CircleShape();
s.setRadius(width / 2);
break;
default:
s = new PolygonShape();
((PolygonShape) s).setAsBox(width / 2, height / 2);
}
BodyDef bd = new BodyDef();
switch (phType) {
case STATIC:
bd.type = BodyType.StaticBody;
break;
case DYNAMIC:
bd.type = BodyType.DynamicBody;
break;
}
bd.position.set(x, y);
bd.angle = valueMap.getValue(e, SceneElement.VAR_ROTATION, 0);
FixtureDef fixture = new FixtureDef();
fixture.shape = s;
fixture.density = valueMap.getValue(e, PhysicsEf.VAR_PH_DENSITY, 1f);
fixture.friction = valueMap.getValue(e, PhysicsEf.VAR_PH_FRICTION, 1f);
fixture.restitution = valueMap.getValue(e, PhysicsEf.VAR_PH_RESTITUTION, 1f);
Body body = world.createBody(bd);
body.createFixture(fixture);
body.resetMassData();
valueMap.setValue(e.getId(), VAR_PH_BODY, body);
}
public static Body createRunner(World world, float x, float y, float width, float height) {
BodyDef bodyDef = new BodyDef();
bodyDef.type = BodyDef.BodyType.DynamicBody;
bodyDef.position.set(new Vector2(x, y));
PolygonShape shape = new PolygonShape();
shape.setAsBox(0.5f, 0.5f, new Vector2(2, 2), 45);
Body body = world.createBody(bodyDef);
body.setGravityScale(Constants.RUNNER_GRAVITY_SCALE);
Fixture fixture = body.createFixture(shape, Constants.RUNNER_DENSITY);
body.setFixedRotation(true);
fixture.setFriction(2f);
body.resetMassData();
body.setUserData(new RunnerUserData());
shape.dispose();
body.setBullet(true);
return body;
}
/**
* adjust the density so that the mass has the given value
*
* @param mass
*/
public void changeMass(float mass) {
fixture.setDensity(mass / body.getMass() * fixture.getDensity());
body.resetMassData();
}
