public override float GetMetallic(RayCastHit hit)
{
if (mroTex != null)
{
Color mro = mroTex.Sample((float)(hit.texcoord.x * tile.x), (float)(hit.texcoord.y * tile.y));
return(mro.r);
}
return(metallic);
}
public override Vector3 GetWorldNormal(RayCastHit hit)
{
if (bump != null)
{
return(RecalucateNormal(hit.normal, hit.tangent, bump.Sample((float)(hit.texcoord.x * tile.x), (float)(hit.texcoord.y * tile.y))));
}
return(hit.normal);
}
public override Color GetEmissive(RayCastHit hit)
{
Color emissiveColor = emissive;
if (emissiveTex != null)
{
emissiveColor *= emissiveTex.Sample((float)(hit.texcoord.x * tile.x), (float)(hit.texcoord.y * tile.y));
}
return(emissiveColor);
}
public override Color GetAlbedo(RayCastHit hit)
{
Color albedoColor = color;
if (albedo != null)
{
albedoColor *= albedo.Sample((float)(hit.texcoord.x * tile.x), (float)(hit.texcoord.y * tile.y));
}
return(albedoColor);
}
public override Color GetEmissive(RayCastHit hit)
{
if (environment == null)
{
return(color * intensity);
}
float fi = (float)Math.Atan2(hit.normal.x, hit.normal.z);
float InvPi = (float)(1.0 / Math.PI);
float u = fi * 0.5f * InvPi;
float theta = (float)Math.Acos(hit.normal.y);
float v = 1.0f - theta * InvPi;
return(environment.Sample(u, v) * color * intensity);
}