How do I shoot following a parabola ?

Hello everyone !

I created a parabola like this : .c3p FILE

I can shoot bullets but I would like that the bullets follow the exact parabola curve. When a bullet is shot, it has to exactlty follow the curve like the curve was when the bullet was shoot. So if the curve move, the bullet previously shot does not have to follow the new curve, I hope I'm clear.

Thanks a lot if you have any idea of doing this ! :)

Check out this demo:

howtoconstructdemos.com/trajectory-calculation-two-methods

Sorry, it's very hard for me to understand your answer just by reading the file because I'm so bad at Maths.

The fact is : in my .c3p file I have a curve which is made in a specific way and I would like to know if it is possible to shoot something by using this curve. As you may see, I want to be able to scale the curve thanks to the mouse wheel and then, the bullets will follow this new curve.

I finally found a solution thanks to this old topic from R0J0hound : construct.net/en/forum/construct-2/how-do-i-18/parabolatracjectory-tracing-55313

Here is an example that predicts the path of a projectile. It also calculates a speed/angle to shoot so that the projectile path passes over the mouse position. You could alternately just set the speed and angle.

https://www.dropbox.com/s/9tftyryvn0pab ... .capx?dl=0

This one has the math to take into account linear damping:

https://www.dropbox.com/s/f5jsfbl3d1szj ... .capx?dl=0