mieki256's diary

// vertex shader with texture
VS_OUT VS(VS_IN v) {
  ...
  output.vNormal = mul(v.vNormal, (float3x3)mWorld).xyz;
  output.vWPos = mul(v.vPosition, mWorld);
  output.vEyePos = mView[3].xyz;
  ...
}

// pixel shader with texture
PS_OUT PS(VS_OUT p) {
  ...
  float3 light = normalize(vLightDir.xyz);
  float3 normal = normalize(p.vNormal);
  ...
  // specular
  float3 view = normalize(p.vEyePos - p.vWPos);
  float3 r = normalize(light - 2.0f * normal * dot(light, normal)).xyz;
  float spe = pow(max(dot(r, view), 0.0f), vMatShininess);

  // float3 halfway = normalize(light - view);
  // float spe = pow(max(dot(normal, halfway), 0.0f), vMatShininess);

  float3 specular = vMatSpecular * spe;
  ...
}