Irrlicht Engine

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   float4 lightPosition; // Object Space
   float3 eyePosition;  // Object space 
   float4x4 WorldViewProj;

void vsmain(float4 Position: POSITION, 
   float3 Normal: NORMAL, 
   float2 Uv: TEXCOORD0,
   float3 Tangent: TEXCOORD1,
   float3 Binormal: TEXCOORD2,

   out float4 oPosition: POSITION, 
   out float2 oUv: TEXCOORD0, 
   out float3 oLightDir: TEXCOORD1, // Tangent Space
   out float3 oEyeDir: TEXCOORD2, // Tangent Space
   out float3 oHalfAngle: TEXCOORD3 // Tangent Space

) 
{  
   oPosition = mul(Position, WorldViewProj); 

   oUv = Uv;
   float3 LightDir = normalize(lightPosition.xyz -  (Position * lightPosition.w));
   float3 EyeDir = eyePosition - Position.xyz; 
    
   float3x3 TBN = float3x3(Tangent, Binormal, Normal); 
    
   // Transformacja do Tangent Space
   LightDir = normalize(mul(TBN, LightDir)); 
   EyeDir = normalize(mul(TBN, EyeDir)); 

   oLightDir = LightDir; 
   oEyeDir = EyeDir; 
   oHalfAngle = normalize(EyeDir + LightDir); 
}

   float3 LightDiffuse;
   sampler2D DecalMap: register(s0);
   sampler2D NormalMap: register(s1);
   sampler2D SpecularMap: register(s2);
   /* Parallax Mapping
   uniform sampler2D HeightMap,*/
   
   

void psmain(float2 Uv: TEXCOORD0,
   float3 LightDir : TEXCOORD1,
   float3 EyeDir : TEXCOORD2,
   float3 HalfAngle : TEXCOORD3,
   out float4 oColor : COLOR)
{
   float2 TexCoord;

   /* Parallax Mapping
   float Height = tex2D (HeightMap, Uv).r;
   Height = Height * 0.04 - 0.02;
   float3 Eye = normalize (EyeDir);
   TexCoord = (Height * Eye.xy) + Uv;
   */
   // else
   TexCoord = Uv;

   float3 Normal = 2.0 * tex2D (NormalMap, TexCoord).rgb - 1.0;
   Normal = normalize (Normal);

   // Œwiat³o rozproszenia
   float3 Diffuse = max (dot (LightDir, Normal), 0.0) * LightDiffuse;
   float3 DecalColor = tex2D (DecalMap, TexCoord).rgb;

   float3 SpecularColor = tex2D(SpecularMap, TexCoord).rgb;

   float Specular = max (dot (HalfAngle, Normal), 0.0);
   Specular = pow (Specular, 8.0);

   oColor = float4 (DecalColor * Diffuse + Specular * SpecularColor, 1.0);
}

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pragma comment(lib,"irrlicht.lib");