Josh, I guess you will stick to ASM anyways, but I've found this one somewhere on my harddisk. It should work too...
Code:
/**************************************************************/
// HLSL NormalMapping Shader
// -------------------------
// By: Daniel "Rhuarc" Niezgocki
// Requires: []VS 1.1
// []PS 1.4
// Skin1: Texture
// Skin2: Normal Map
//
// Usage: Free to use, credit is nice, but not required.
/**************************************************************/
function normalMap_init
{
mat_inverse(mtl.matrix, matWorld);
}
material normalMap_fx {
flags=tangent;
event = normalMap_init;
effect="
// VertexShader ------------------
float4x4 matWorldViewProj;
float4x4 matWorld;
float4 vecSunPos;
float4 vecViewPos;
float4x4 matMtl;
texture entSkin1;
texture entSkin2;
sampler base_map = sampler_state
{
texture = (entSkin1);
};
sampler bump_map = sampler_state
{
texture = (entSkin2);
};
struct VS_INPUT_STRUCT
{
float4 position : POSITION;
float3 normal : NORMAL;
float3 texcoord0 : TEXCOORD0;
float3 tangent : TEXCOORD2;
};
struct VS_OUTPUT_STRUCT
{
float4 position : POSITION;
float2 bump_map : TEXCOORD0;
float3 light_angle : TEXCOORD1;
};
VS_OUTPUT_STRUCT mainVS( VS_INPUT_STRUCT vsInStruct )
{
VS_OUTPUT_STRUCT vsOutStruct;
vsOutStruct.position = mul( vsInStruct.position, matWorldViewProj );
float3 position = mul( matWorld, vsInStruct.position );
vsOutStruct.bump_map = vsInStruct.texcoord0;
float3 light_normal_vector = mul( vsInStruct.normal, matWorld );
vsOutStruct.light_angle = light_normal_vector;
return vsOutStruct;
};
// PixelShader -------------------
float bumpiness = 0.5;
float specular = 0.5;
float4 vecAmbient;
float4 vecDiffuse;
float4 vecSpecular;
float vecViewDir;
struct PS_INPUT_STRUCT
{
float2 bump_map : TEXCOORD0;
float3 light_angle : TEXCOORD1;
};
struct PS_OUTPUT_STRUCT
{
float4 color0 : COLOR0;
};
PS_OUTPUT_STRUCT mainPS( PS_INPUT_STRUCT psInStruct )
{
PS_OUTPUT_STRUCT psOutStruct;
float3 base = tex2D( base_map, psInStruct.bump_map );
float3 bump = tex2D( bump_map, psInStruct.bump_map );
// Uncompress vectors ([0, 1] -> [-1, 1])
float3 lightVectorFinal = (psInStruct.light_angle - 0.5);
float3 bumpNormalVectorFinal = bumpiness * (bump - 0.5);
// Compute diffuse factor
float diffuse = dot(bumpNormalVectorFinal, lightVectorFinal);
psOutStruct.color0.rgb = ( diffuse * base + + max(diffuse-specular,0));
psOutStruct.color0.a = 1.0f;
return psOutStruct;
};
technique normalMap
{
pass P0
{
VertexShader = compile vs_1_1 mainVS();
PixelShader = compile ps_1_4 mainPS();
}
}
";
}
action normalMap_ent
{
my.material = normalMap_fx;
}
