# How do I make an object travel making a parable.

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• Thank you Colludium this works great! What I'm trying to do now, is translate this into code into Unity. I'm not sure if you're familiar with it, but I get a bug where the arrows just fly off into space, like rockets. For now, to avoid complexity, I'm not using shadows, but still, no luck. This is the code I'm using:

To set up the arrow (left click in your demo):

``````>         angleTowardX = target.position.x;
angleTowardY = target.position.y;
lastX = transform.position.x; // Get the possition of the arrow
lastY = transform.position.y;
launch_time = Time.time;
Vector2 launcher = new Vector2(transform.position.x, transform.position.y);
Vector2 aimpoint = new Vector2(target.position.x, target.position.y);
flight_time = Vector2.Distance(launcher, aimpoint) ; // Not using the shadow bullet speed here
Y_init_velocity = (float)0.5 * flight_time; // Not using the accelerator here[/code:3t219d1t]

Each frame I do:

[code:3t219d1t]
time_of_flight = launch_time - Time.time;

// Set the position of the arrow
transform.position = new Vector3(transform.position.x, (float)(transform.position.y - Y_init_velocity * time_of_flight + 0.5 * Y_accel * Mathf.Pow(time_of_flight, 2)), transform.position.z);

// Calculating the rotation
Vector2 last = new Vector2(lastX, lastY);
Vector2 current = new Vector2(transform.position.x, transform.position.y);
// Not sure if this line works correctly, could this be it?
Quaternion rotation = Quaternion.Euler(Vector2.Angle(last, current), 0, 0);
transform.rotation = rotation;

lastX = transform.position.x;
lastY = transform.position.y;[/code:3t219d1t]
``````

This forum, and particularly this section, is for questions on C2. If you have questions on Unity, then you should be asking on their forums, rather than here.

Getting a C2 user to go out of their way to create something for you just so you can convert it to Unity is quite frankly a disgrace.

• Editing out what you posted is pointless - that's why I quoted it. This just puts you in an even worse light.

It would have been better just to apologize and move on.

• 19 posts