Help - Collisions/Gravity

howkerman · Post by **howkerman** » Mon Sep 14, 2009 1:52 pm

Hi there, I wanna start a RPG. I got a character scene node and a following camera. But I did some collisions and gravity:

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ISceneNodeAnimator* anim = mSceneManager->createCollisionResponseAnimator(
			selector, character, vector3df(1,1,1),
			vector3df(0,-10,0),
			vector3df(0,0,0));
		character->addAnimator(anim);
		anim->drop();

But it almost CAN'T walk on the heightmap terrain. It always get stuck and if I scale the "collisionsphere" up, it works a little better, but it makes the character fly in the air.
How can I fix this?

serengeor · Post by **serengeor** » Mon Sep 14, 2009 2:16 pm

your createCollisionResponseAnimator is only 1 float radius ? :O

howkerman · Post by **howkerman** » Mon Sep 14, 2009 2:20 pm

serengeor wrote:your createCollisionResponseAnimator is only 1 float radius ? :O

If I make it too big the character will float above the terrain

serengeor · Post by **serengeor** » Mon Sep 14, 2009 2:30 pm

So your character height is 2floats ?
You could try to set the debug data to see the collision sphere.

howkerman · Post by **howkerman** » Mon Sep 14, 2009 2:41 pm

serengeor wrote:So your character height is 2floats ?
You could try to set the debug data to see the collision sphere.

how?

twilight17 · Post by **twilight17** » Mon Sep 14, 2009 3:37 pm

This may be what you're looking for:

http://irrlicht.sourceforge.net/docu/cl ... c139bf9de7

Alpha Omega · Post by **Alpha Omega** » Tue Sep 15, 2009 3:11 am

Your in luck because I was just testing collisions with the irrlicht methods. Your problem is your level is scaled very small which is not a bad thing just need to compensate for it. Depending on how small your level is scaled you will need to make the ellipsoid smaller and smaller until you get the results you want. You said that making

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vector3df(1,1,1)

smaller that it improved results right? Then just keep going small try .5, then .05 and so on until you get the results that are best for your map. Also might want to place ur node up a little bit as indicated by the third vector3df function argument. How is the gravity scaled? Can you jump? Try it and see how fast you fall, my bet is it is very rapid descent.