Question

I want to program a racinggame for Android. My Problem is, that if I rotate the car and want to translate the position it doesn’t translate into the new direction of the car , but always in the X axis of the world.

Here is my wrong code.. thank you

gl.glTranslatef(car.position.x, car.position.y, car.position.z);

gl.glRotatef(car.currentAngle, 0, 1, 0);

Answer 1

Ok I have the solution. All I have to do is to translate my Car towards the new directional vector who gets changed by the new angle of my car 🙂

if (accel < 0)
    position.add((float) Math.sin(current * Math.PI/180)/5, 0, (float) Math.cos(currentangle * Math.PI/180)/5);
if (accel > 0)
    position.sub((float) Math.sin(current * Math.PI/180)/5, 0, (float) Math.cos(currentangle * Math.PI/180)/5);

and in the rendering class

gl.glTranslatef(car.position.x, car.position.y, car.position.z);
gl.glRotatef(car.currentAngle, 0, 1, 0);