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why this code [key down, repeat -> script editor] is working with x velocity and y velocity but with directional velocity it doesn't ?

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...velocity -=1;

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directional_velocity-=1;

that should definately work, if it isnt something has to be wrong. Make sure the repeat is on i guess. Dont know what to tell you really if that doesnt work.

Make sure you have some value in angle. Angle and directional_velocity work together.

dont know whats going on please take a look at this. Press down button and see the problem. The angle is 90, repeat is enabled and code is : directional_velocity -=1; The movement isnt smooth and its to slow.

Don't use the - sign for the directional_velocity, it's supposed to be positive direction. When you use -1 dv + 90 angle, you're actually moving 270 degrees instead of 90.

Try:

directional_velocity=1;
angle=270;

on the keydown>down.

Directional velocity is a constant, you wouldn't want to add to it, just set it. Never use negative values on it, instead, just change your angle.

DST

Heres a whopper for ya...

How would I go about calculating the angle AND velocity speed (Directional_velocity?) of the impact when a collision is made on something with a slanted surface. In other words, I want to say if I collide into something with a 34 degree angle, that it would act as a physical response but I dont want to use physical response, because when it comes to particles or many actors you know that physical response lags xD

You'll need a way of knowing the angle of the surface. See my post here.
Then you'll need to measure the difference between these angles, using getangle.
Then you can find the correct angle to bounce off.

Hblade wrote:I want to say if I collide into something with a 34 degree angle, that it would act as a physical response but I dont want to use physical response, because when it comes to particles or many actors you know that physical response lags xD

Hmmm...if you want to make physical response without using Physical Response, try this :

Particle->Collision->Platform :

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angle+=180;
directional_velocity-=directional_velocity;

But I can't guarantee the accuracy. Since it just uses very simple code...

Thanks, both of you