private Body initPhysicsBody(World world, float x, float y) {
BodyDef bodyDef = new BodyDef();
bodyDef.type = BodyType.DYNAMIC;
bodyDef.position = new Vec2(0, 0);
Body body = world.createBody(bodyDef);
PolygonShape shape = new PolygonShape();
Transform fx = new Transform();
fx.position.set(100f, 100f);
shape.centroid(fx);
shape.setAsBox(
sprite.layer().width() * GameScreen.M_PER_PIXEL / 2,
sprite.layer().height() * GameScreen.M_PER_PIXEL / 2);
FixtureDef fixtureDef = new FixtureDef();
fixtureDef.shape = shape;
fixtureDef.density = 0.4f;
fixtureDef.friction = 0.1f;
fixtureDef.restitution = 0f;
body.createFixture(fixtureDef);
body.setLinearDamping(0.2f);
body.setTransform(new Vec2(x, y), 0f);
// MassData md = body.getMassData();
// massD.center.set(2f, 0); body.setMassData(massD);
return body;
}
void playerControl(LudumDare26Game.ControlsState controlsState) {
boolean doStop = !(controlsState.leftPressed || controlsState.rightPressed);
final Body body = getBody();
float linearDamping = 0;
if (doStop) {
body.setAngularVelocity(0);
// linearDamping = 10f;
Vec2 linearVelocity = body.getLinearVelocity();
linearVelocity.x *= 0.9;
// body.applyForce(new Vec2(v, 0), body.getPosition());
body.setLinearVelocity(linearVelocity);
} else {
Vec2 linearVelocity = body.getLinearVelocity();
final int dir = (controlsState.leftPressed ? -1 : 0) + (controlsState.rightPressed ? 1 : 0);
float v = linearVelocity.x;
v += dir * MOVE_ACC;
v = Math.max(-MOVE_SPEED, Math.min(v, MOVE_SPEED));
linearVelocity.x = v;
// body.applyForce(new Vec2(v, 0), body.getPosition());
body.setLinearVelocity(linearVelocity);
// linearDamping = 1f;
}
body.setLinearDamping(linearDamping);
}
@Override
Body initPhysicsBody(World world, float x, float y, float angle) {
FixtureDef fixtureDef = new FixtureDef();
BodyDef bodyDef = new BodyDef();
bodyDef.type = BodyType.DYNAMIC;
bodyDef.position = new Vec2(0, 0);
Body body = world.createBody(bodyDef);
CircleShape circleShape = new CircleShape();
circleShape.m_radius = getRadius();
fixtureDef.shape = circleShape;
fixtureDef.density = 0.4f;
fixtureDef.friction = 0.1f;
fixtureDef.restitution = 0.35f;
circleShape.m_p.set(0, 0);
body.createFixture(fixtureDef);
body.setLinearDamping(0.2f);
body.setTransform(new Vec2(x, y), angle);
return body;
}
public void start() {
Vec2 gravity = new Vec2(0, 0);
World world = new World(gravity);
BodyDef groundBodyDef = new BodyDef();
groundBodyDef.position.set(0, -25);
Body groundBody = world.createBody(groundBodyDef);
PolygonShape groundBox = new PolygonShape();
groundBox.setAsBox(900, 10);
groundBody.createFixture(groundBox, 0);
// Dynamic Body
BodyDef bodyDef = new BodyDef();
bodyDef.type = BodyType.DYNAMIC;
bodyDef.position.set(0, 0);
Body body = world.createBody(bodyDef);
PolygonShape dynamicBox = new PolygonShape();
dynamicBox.setAsBox(12, 12);
FixtureDef fixtureDef = new FixtureDef();
fixtureDef.shape = dynamicBox;
fixtureDef.density = 1f;
fixtureDef.friction = 0.3f;
body.createFixture(fixtureDef);
// Setup world
float timeStep = 1.0f / 60.0f;
int velocityIterations = 6;
int positionIterations = 2;
body.setLinearVelocity(new Vec2(15.0f, -15.0f));
body.setLinearDamping(2f);
Vec2 f = body.getWorldVector(new Vec2(0.0f, -30.0f));
Vec2 p = body.getWorldPoint(body.getLocalCenter().add(new Vec2(-.2f, 0f)));
// body.applyForce(new Vec2(-200,-200),new Vec2(-200,200));
try {
Display.setDisplayMode(new DisplayMode(screen_width, screen_height));
Display.create();
} catch (LWJGLException e) {
e.printStackTrace();
System.exit(0);
}
lastFPS = getTime();
// standardBall[0] = new Ball(400,200,0,12);
// standardBall[1] = new Ball(100,210,2,12);
// standardBall[0].addImpulse(-10,0);
standardBall[0] = new Ball(200, 300, 0, 12);
standardBall[1] = new Ball(415, 100, 2, 12);
standardBall[0].addImpulse(10, -9.99f);
standardBall[2] = new Ball(620, 270, 2, 12);
standardBall[3] = new Ball(640, 290, 2, 12);
standardBall[4] = new Ball(660, 310, 2, 12);
standardBall[5] = new Ball(680, 330, 2, 12);
standardBall[6] = new Ball(620, 230, 2, 12);
standardBall[7] = new Ball(640, 210, 2, 12);
standardBall[8] = new Ball(660, 190, 2, 12);
standardBall[9] = new Ball(680, 170, 2, 12);
standardBall[10] = new Ball(640, 250, 1, 12);
standardBall[11] = new Ball(660, 230, 2, 12);
standardBall[12] = new Ball(660, 270, 2, 12);
standardBall[13] = new Ball(680, 290, 2, 12);
standardBall[14] = new Ball(680, 210, 2, 12);
standardBall[15] = new Ball(680, 250, 2, 12);
standardTable = new Table(0, 0, 800, 400, 25, 15);
// init OpenGL
GL11.glMatrixMode(GL11.GL_PROJECTION);
GL11.glLoadIdentity();
GL11.glOrtho(0, 900, 0, 500, 1, -1);
GL11.glMatrixMode(GL11.GL_MODELVIEW);
while (!Display.isCloseRequested()) {
int delta = getDelta();
world.step(timeStep, velocityIterations, positionIterations);
Vec2 position = body.getPosition();
float angle = body.getAngle();
// System.out.printf("%4.2f %4.2f %4.2f\n", position.x, position.y, angle);
// Clear the screen and depth buffer
GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);
standardTable.draw();
for (int i = 0; i < NUMBER_OF_BALLS; i++) {
standardBall[i].draw();
standardBall[i].update(delta);
}
standardBall[0].setX((position.x * 20) + offset_x);
standardBall[0].setY((position.y * 20) + offset_y);
update(delta);
Display.update();
Display.sync(60);
}
Display.destroy();
}
