Wind movement

[jellytot]

Let's take this example.

View is top down.

I have a soccer ball on the field. There are other objects on the field.

I want to move the soccer ball by controlling wind. So holding down left arrow makes wind blow to the left. Letting go of the left arrow the ball will decelerate from friction. But if I hold up arrow the wind will blow up and the ball will move upwards, and a little left from it's previous momentum.

If it hits an object on the field, it bounces.

I've tried several different ways to do this, but it's not working out.

Any ideas?

JT

[Jaffob]

Use the 8-Directions movement. You can set the acceleration & deceleration to very low numbers for a windy effect.

[jellytot]

No Good. It doesn't take into account inertia.

JT

[Jaffob]

Sorry. I didn't even test what I said! :blush:

You might have to make a custom movement. Try giving the soccer ball two Alterable Values named xWind and yWind, added and subtracted to while keys are down. On an "Always" condition, set the X position of the ball to the current X + xWind. Do the same with Y.

Try something along those lines. If you want me to, I can attempt to make an example.

[jellytot]

Hi,

I had tried that, but collision detection (bouncing) off of objects does not work very well using this method.


JT

[Jaffob]

Maybe it will work if you use detectors. Create four actives, each pasted to a side of the ball. If a certain one collides with a wall, you can set xWind to xWind * -1 or yWind to yWind * -1, depending on which detector hit.