First Person Shooter gun clipping

Rollcage · 10-06-2011 06:14 AM

What is the best way to prevent gun from appearing to clip through walls in a FPS? I know drawBehind() can be used but that fills the mesh with solid colours.
Is there anything similar to drawBehind or does the mesh need a special shader/material that does the same thing?

cheers.

Edit: calling mesh.drawBlen() from case RM_BEHIND apperas to achieve this effect. Are there any other ways?

**Esenthel** · 10-06-2011 11:14 AM

rotate the gun towards up direction, or increase player controller radius

Rollcage · 10-06-2011 11:47 AM

1) Can a shader be applied to the weapon material that would allow the mesh to be rendered over everything else in the world?

Also:
2) I'm using a lerp function to adjust the mesh matrix for the weapon when it is moved.
The weapon follows the orientation of a point on the character skeleton.
I use

Code:

Vec v1 = Lerp(anim.matrix().pos, point.pos, 0.9f);

anim.matrix(Matrix().setPosDir(v1 , point.cross(), point.dir));

This works however the gun moving is not smooth sometimes. Is there some way that I can get it smoother?

Thanks

**Esenthel** · 10-06-2011 11:51 AM

as I've mentioned your other thread, gun behind wall would get partially rendered shadowed (it would not look good), so it is not supported
I recommend rotating gun (I've seen it in some game, and it looked good)

Rollcage · 10-06-2011 11:58 AM

I'll give it a try, however I can see problems when the player is trying to aim the weapon around a corner, and it rotates up instead.

fatcoder · 10-06-2011 02:36 PM

Normally you would clear the z-buffer after rendering the scene and then render your fps weapon. This will ensure that your weapon is always rendered over the top of the scene.

Driklyn · 11-10-2011 11:04 PM

Is it possible to draw the world, clear the depth, and then draw the gun? All my tests thus far have failed.

This works, but messes with some effects and, at times, can drop the framerate in half:

Code:

Renderer(world);

// Draw anything that relies on the world's depth here (e.g. D.textDepth)..

Renderer.combine = true;

Renderer(gun);

Renderer.combine = false;

// Draw GUI..

----------

EDIT: Actually, nevermind, it appears to be working great now! I forgot my gun object was also drawing the bullets and was giving a weird motion effect on them because of this. Switched the bullets to be drawn with the world and everything is fine now.

Not sure what was causing the framerate drop, though. However, it doesn't appear to be happening anymore, at the moment.

First Person Shooter gun clipping
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