I am trying to make a sling-shot that fires a projectile. I want it to act like the standard sling-shot in angry birds.
So far I managed to get the "pulling" effect, ie. If I draw backwards it fires in the opposite angle of the direction my finger went, and with different speeds depending on how far I dragged the finger from the "start-position".
Touch Code/logic:
@Override public boolean touchUp(int screenX, int screenY, int pointer, int button) { touchPos.set(screenX, screenY, 0); camera.unproject(touchPos); Vector2 temp = new Vector2(touchPos.x, touchPos.y); Vector2 d = temp.sub(startPos); //subtract finger-position from start-position float velX = d.x * FIRE_SPEED; //add speed float velY = d.y * FIRE_SPEED; d.set(velX, velY); // set the velocity projectile.setVelocity(d); //send velocity to object projectile.setFired(true); //signal the object that its been fired return false; } Object Code:
public void update(float delta){ if(fired){ pos.x -= velocity.x * delta; //since I want it to move the opposite direction of where I dragged, I subtract pos.y -= velocity.y * delta; } } How would I go about adding gravity here? I want it to shoot in the set direction, then after a certain time/distance I want it to start falling (taking into account the direction so that it looks like real gravity), exactly as in angry birds.
