hi im trying to implement a simple specular highlight+ diffuse shader .. the diffuse component seems to be working but the specular component isnt showing up properly... if i make the specular power very high (say 200) then nothing shows up at all.. this could mean that there are no values in the range 0.9-1.0 being generated in the dot product... what could be wrong???
DV2P DiffuseVS(float4 inPos :POSITION,float4 inNor :NORMAL)
{
DV2P Output=(DV2P)0;
Output.Position=mul(inPos,xViewProjection);
Output.Position3D=mul(inPos,xViewProjection);
Output.Normal=mul(inNor,xRot);
return Output;
}
DP2F DiffusePS(DV2P PSin)
{
DP2F Output=(DP2F)0;
float3 vector1;
float3 vector2;
float4 xLightPos={20.0f,10.0f,5.0f,0.0f};
vector1=normalize(xLightPos);
vector2=normalize(PSin.Normal);
float DiffuseFactor=dot(vector1,vector2);
Output.Color.r=0.9f*DiffuseFactor;
Output.Color.g=1.0f*DiffuseFactor;
Output.Color.b=1.0f*DiffuseFactor;
Output.Color.a=1.0f;
float4 v={0.0f,10.0f,10.0f,0.0f};
v=-PSin.Position3D;
float4 V=normalize(v);
float4 R=normalize(reflect((xLightPos),(PSin.Normal)));
float specular=saturate(dot(V,R));
Output.Color+=pow(specular,50);
return Output;
}
*edit* : As you can see in this picture the specular highlighting "seems" right on the model in front... however the model at a the back appears to have hardly any specular highlighting on it... am i doing something wrong with my matrices, coordinate spaces etc??
PS :Dont mind the blur .. its in a separate pass.. also there seems to be pixelation of the image due to the half pixel offset thingy have to look into that...
[Edited by - rohith291991 on December 24, 2008 3:54:53 AM]
PS :Dont mind the blur .. its in a separate pass.. also there seems to be pixelation of the image due to the half pixel offset thingy have to look into that...
[Edited by - rohith291991 on December 24, 2008 3:54:53 AM]
