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weird lightning problem...

Started by Gilzu Jan 10, 2003 at 11:52 AM 2 replies 300+ views

Original Post

Jan 10, 2003 at 11:52 AM

i''m writing my own mesh loading class, but have this weird problem: whenever i rotate my mesh, the directional light i''m using rotates with it! my code:

  
void CMeshLib::Render(float dx, float dy, float dz, float dr, float dp, float di)
{
	if (Loaded==false) {
		return;
	};

	D3DXMATRIX matWorld;  
	D3DXMatrixTranslation(&matWorld, dx, dy, dz);
	g_pd3dDevice->SetTransform(D3DTS_WORLD, &matWorld);
	D3DXMatrixRotationYawPitchRoll(&matWorld, D3DXToRadian(dr), D3DXToRadian(dp), D3DXToRadian(di));
	g_pd3dDevice->MultiplyTransform(D3DTS_WORLD, &(D3DMATRIX)matWorld);

        // and run the vertex buffer...

}

anybody have an idea whats the prob? 10x

Gil Zussman gil@gilzu.com http://www.gilzu.com

tok_junior

Jan 10, 2003 at 6:20 PM

After a quick look, i can just say you should complete the matrix-calculation BEFORE you set the transformstate to it.
It prolly won''t help, but you might as well try it

--
MFC is sorta like the swedish police... It''''s full of crap, and nothing can communicate with anything else.

Gilzu

Author

Gilzu

Jan 10, 2003 at 7:15 PM

do you mean something like this?

  
D3DXMATRIX mat1, mat2, mat;  
	D3DXMatrixTranslation(&mat1, dx, dy, dz);
	D3DXMatrixRotationYawPitchRoll(&mat2, D3DXToRadian(dr), D3DXToRadian(dp), D3DXToRadian(di));
	D3DXMatrixMultiply(&mat,&mat2,&mat1);
	g_pd3dDevice->SetTransform(D3DTS_WORLD, &mat);

doest work either.
i have a spinning model that the light spins with it,
but the other object have thir own lightning directions.

help?

Gil Zussman
gil@gilzu.com
http://www.gilzu.com

Gilzu

Author

Gilzu

Jan 11, 2003 at 8:54 AM

*bump*

Gil Zussman
gil@gilzu.com
http://www.gilzu.com

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