internal void SetColor(OpenGL gl, TGLCoord V)
{
float C = 0;
C = (float)Math.Sqrt(V.X * V.X + V.Y * V.Y + V.Z * V.Z);
gl.Color(C, C, C + 0.1f);
}
//{----------------------------------------------------------}
//{ Interpolate the position where an metaballs intersects }
//{ the line betweenthe two coordicates, C1 and C2 }
//{----------------------------------------------------------}
internal void Interpolate(TGridPoint C1, TGridPoint C2, out TGLCoord CResult, out TGLCoord Norm)
{
float mu = 0;
if (Math.Abs(C1.Value) == 1)
{
CResult = C1.Pos;
Norm = C1.Normal;
}
else
if (Math.Abs(C2.Value) == 1)
{
CResult = C2.Pos;
Norm = C2.Normal;
}
else
if (C1.Value == C2.Value)
{
CResult = C1.Pos;
Norm = C1.Normal;
}
else
{
mu = (1 - C1.Value) / (C2.Value - C1.Value);
CResult.X = C1.Pos.X + mu * (C2.Pos.X - C1.Pos.X);
CResult.Y = C1.Pos.Y + mu * (C2.Pos.Y - C1.Pos.Y);
CResult.Z = C1.Pos.Z + mu * (C2.Pos.Z - C1.Pos.Z);
Norm.X = C1.Normal.X + (C2.Normal.X - C1.Normal.X) * mu;
Norm.Y = C1.Normal.Y + (C2.Normal.Y - C1.Normal.Y) * mu;
Norm.Z = C1.Normal.Z + (C2.Normal.Z - C1.Normal.Z) * mu;
}
}