HLSL TangentToWorld.hlsl

https://gyazo.com/bab134a3c40d98fafa62fd8ff8af5a73

code:HLSL TangentToWorld.hlsl

float4x4 matW; // The World matrix

// Need a sampler to fetch from the normal map

sampler sNormalMap;

struct PSInupt

{

float4 color : COLOR0;

float2 uv : TEXCOORD0;

// Import world position, tangent and normal

float3 worldPos : COLOR1;

float3 tangent : TEXCOORD1;

float3 normal : TEXCOORD2;

};

float4 PixelShader(inPSInput input) : COLOR0

{

// Setup the temporary color register

float4 tmpColor = input.color;

// Fetch the normal from the texture

// Need to bias the result to get it

// in the range of -1 to 1

float3 tmpNormal = 2.0 * (tex2D(sNormalMap, input.uv) - 0.5);

// Renormalize our resulting inputs and get binormal

float3 tangent = normalize(input.tangent);

flaot3 normal = normalize(input.normal);

flaot3 binormal = normalize(cross(tangent, normal));

//Compute matrinx inverse

Float3x3 matInverse = transpose(float3x3(tangent, binormal, normal));

// Bring normal into world space

normal = mul(mul(tmpNormal, matInverse), matW);

}