[dx9] setting a shader constant?

If you're not using ID3DXConstantTable or ID3DXEffect, you have to use IDirect3DDevice9::SetVertexShaderConstantF. In your case you would pass "0" as your start register.

thanks for your reply

i've initially used the table but now i've switched to IDirect3DDevice9::SetVertexShaderConstantF

result = app.getDevice()->SetVertexShaderConstantF(0, &matWorldViewProj._11, 4);

but now I dont get the geometry on my screen anymore. it worked with the constant table

thanks for your reply

i've initially used the table but now i've switched to IDirect3DDevice9::SetVertexShaderConstantF

result = app.getDevice()->SetVertexShaderConstantF(0, &matWorldViewProj._11, 4);

but now I dont get the geometry on my screen anymore. it worked with the constant table

It should be 16 in the last parameters of SetVertexShaderConstantF, not 4. A matrix is made of 16 floats. So your're just passing the only 4 elements, not the whole matrix.

It should be 16 in the last parameters of SetVertexShaderConstantF, not 4. A matrix is made of 16 floats. So your're just passing the only 4 elements, not the whole matrix.

https://msdn.microsoft.com/en-us/library/windows/desktop/bb174467%28v=vs.85%29.aspx?f=255&MSPPError=-2147217396

No, 4 is correct:

Number of four float vectors in the array of constants.

but now I dont get the geometry on my screen anymore. it worked with the constant table

Do you need to transpose your matrix?