public override Vector3 EvalMaterial(Intersection intersec, Material mat)
{
if (mat.Textured)
{
double x = Math.Floor(intersec.Point.X);
double y = Math.Floor(intersec.Point.Z);
if (x % 2 == 0 ^ y % 2 == 0)
return mat.Color.ToVector() * 0.5;
}
return mat.Color.ToVector();
}
public override Vector3 EvalMaterial(Intersection intersec, Material mat)
{
if (mat.Textured)
{
//double scale = 255.0;
//int u = (int)Math.Floor(intersec.BaryCoords.X * scale);
//int v = (int)Math.Floor(intersec.BaryCoords.Y * scale);
//double fac = (u ^ v) * 0.75 / scale + 0.25;
//col *= fac;
Vector2 bary = intersec.BaryCoords;
double v0contrib = 1 - bary.X - bary.Y;
double v1contrib = 1 - bary.X;
double v2contrib = 1 - bary.Y;
Vector2 texCoord = Vertex0.TexCoord + (Vertex1.TexCoord - Vertex0.TexCoord) * v1contrib + (Vertex2.TexCoord - Vertex0.TexCoord) * v2contrib;
texCoord.X = 1 - texCoord.X;
return mat.GetTextureColor(texCoord);
}
return mat.Color.ToVector();
}
public override Vector3 EvalMaterial(Intersection intersec, Material mat)
{
if (mat.Textured)
{
double xtex = (1 + Math.Atan2(intersec.Normal.Z, intersec.Normal.X) / Math.PI) * 0.5;
double ytex = Math.Acos(intersec.Normal.Y) / Math.PI;
double scale = 4;
bool pattern = ((xtex * scale) % 1.0 > 0.5) ^ ((ytex * scale) % 1.0 > 0.5);
if (pattern)
return Vector3.Zero;
//int x = (int)(Math.Abs(point.X) * 255.0);
//int y = (int)(Math.Abs(point.Y) * 255.0);
//int z = (int)(Math.Abs(point.Z) * 255.0);
//int c = x ^ y ^ z;
//col = Extensions.ColorFromHSV(c / 255.0 * 360.0, 0.8, 0.7).ToVector();
}
return mat.Color.ToVector();
}
public override Vector3 EvalMaterial(Intersection intersec, Material mat)
{
return mat.Color.ToVector();
}
public override Vector3 EvalMaterial(Intersection intersec, Material mat)
{
Vector2 bary = intersec.BaryCoords;
if (bary.X + bary.Y > 1.0)
{
intersec.BaryCoords.X = 1.0 - intersec.BaryCoords.X;
intersec.BaryCoords.Y = 1.0 - intersec.BaryCoords.Y;
return T2.EvalMaterial(intersec, mat);
}
return T1.EvalMaterial(intersec, mat);
}
public abstract Vector3 EvalMaterial(Intersection intersec, Material mat);
