Creating Bullet Holes

hey
you can use a decal system like this

http://www.humus.name/3D/VolumeDecals.zip

You can also take a look at this one:
http://blog.wolfire.com/2009/06/how-to-project-decals/

I'm not looking to use shader now, is there is anyway to calculate the billboard position and vertex position information to set the billboard transformation according to that?

1- "p" is your intersected point

2- "v1,v2,v3" are your intersected face vertices

3- "N" is your face normal or you can calculate it from your vertices
{
A = v2 - v1
B = v3 - v1
N = normalize( cross( A , B ) )
}

4- Calculate your Up and Right vector
{
up = normalize( p - v1 )
right = cross( up , N )
}

5- "Q1,Q2,Q3,Q4" are your Quad vertices and can calculate like this
{
Q1 = p + up * scale
Q2 = p - up * scale
Q3 = p + right * scale
Q4 = p - right * scale
}

@stc.5421: What about the billboard rotation?

You don't need it , that create a quad align to the mesh face .

this is a d3d10 sample, why is do you give him d3d10 code?, plus its not even the full source code...

@stc.5421: I have LPD3DXMESH, how can I calculate the face normal, face vertices?

Did you do intersect to your mesh by D3DXIntersect function?

No, I'm using Bullet Physics Raytest.

And what's your problem right now?
Can you get information from RayResultCallback ?

Can I get the face normal and face vertices from ClosestRayResultCallback? I'm trying to get them to use the example you gave above.

Sorry for delay , use this:

http://bulletphysics.org/Bullet/phpBB3/download/file.php?id=588

Hi stc.5421,

I will be using D3DXIntersect() instead, how can I get the intersected face vertices when I use D3DXIntersect()?

Also, where normalize() and cross() are located? Do you mean btVector3::normalize() and btVector3::cross()?

Any update guys? I still didn't resolve the issue.