Ugly Lighting

Graphics and GPU Programming Programming

Started by Beem June 23, 2007 01:37 PM

3 comments, last by psycho_svk 16 years, 10 months ago

127

Author

June 23, 2007 01:37 PM

Hello, I am currently experiencing some very ugly lighting using Direct3D 9. I am using a D3DTS_WORLD transform to both transform and SCALE a mesh. I capitalize the world scale because that is where my ugly lighting is showing up.

Here is the mesh as it is lit when it is scaled (notice the sort of jagged lighting on the character's back):

Here is the mesh not scaled:

The lighting is much more smooth when the world transform does not scale the mesh.

Here is what I'm doing to set up the world transform:


D3DMATRIX matScale, matTrans;
D3DXMatrixScaling(&matScale, SCALE_FACTOR, SCALE_FACTOR, SCALE_FACTOR);
D3DXMatrixMultiply(&matTrans, &matScale, &m_matOrient);
m_pDevice->SetTransform(D3DTS_WORLD, &matTrans);

Any help as to what my options are to get the lighting to look more uniform when the mesh is scaled would be appreciated.

Peace Out.

Namethatnobodyelsetook

1,260

June 23, 2007 01:43 PM

Set D3DRS_NORMALIZENORMALS to true.

sirob

1,181

June 23, 2007 01:44 PM

Your normals are getting scaled along with the model, causing them to no longer be normalized.

You'll need to tell DX to renormalize them (at a small performance cost) using:
device->SetRenderState(D3DRS_NORMALIZENORMALS, true);

Hope this helps.

[EDIT] Too slow. :(

Sirob Yes.» - status: Work-O-Rama.

Beem

127

Author

June 23, 2007 01:48 PM

Thanks guys, that works, the mesh looks a lot better.

Peace Out.