I decided to make a try with deferred shading.
For now i would like to make a simple directional light.
So made Gbuffers: Position, Basecolor from texture, Normal, Depth (depth it's simply a copy resource from depthbuffer in D3D10).
With this shader
PS_OUT ps_main(PS_INPUT In)
{
PS_OUT output = (PS_OUT)0;
float4 BaseColor = Texture.Sample(SamplText,In.Tex);
output.Position = In.WorldPos;
output.Normal = 0.5f * (float4(In.Nor,1.0f) + 1.0f);
output.Diffuse = BaseColor;
return output;
}
But i noticed that, in order to make trasformation from screen space to world space and all this kind of conversion, there are some operations to do that i do not know.
Infact, directional light is not the same making it in forward rendering.
float4 ps_draw(in float4 Pos:SV_POSITION, in float2 Tex:TEXCOORD) : SV_TARGET
{
float4 TexC = BaseColor.Sample(SamplText,Tex);
float3 Norm = 2.0f * Normal.Sample(SamplText,Tex).xyz - 1.0f;
return TexC * max(0.0f,dot(Norm,normalize(LightDirection)));
}
void vs_draw (in float4 Pos:POSITION, in float2 Tex:TEXCOORD,out float4 WP:SV_POSITION,out float2 Tx:TEXCOORD)
{
WP = float4(Pos.xyz,1);
Tx = Tex - halfpixel;
}
How should i insert data in buffers and retrive it in the same way??
