private Vector3 MakeTriangleVertex(MarkableVertex a, MarkableVertex b, float isoLevel)
{
const float MinRatio = 0.00001f;
if (Math.Abs(isoLevel - a.IsoLevel) < MinRatio)
{
return(a.Position);
}
if (Math.Abs(isoLevel - b.IsoLevel) < MinRatio)
{
return(b.Position);
}
if (Math.Abs(a.IsoLevel - b.IsoLevel) < MinRatio)
{
return(a.Position);
}
float ratio = (isoLevel - a.IsoLevel) / (b.IsoLevel - a.IsoLevel);
return(new Vector3()
{
X = a.Position.X + ratio * (b.Position.X - a.Position.X),
Y = a.Position.Y + ratio * (b.Position.Y - a.Position.Y),
Z = a.Position.Z + ratio * (b.Position.Z - a.Position.Z)
});
}
private static void AddTriangle(MarkableVertex a, MarkableVertex b, MarkableVertex c, List <Vector3[]> triangles)
{
if (a.Marked && b.Marked && c.Marked)
{
triangles.Add(new Vector3[] { a.Position, b.Position, c.Position });
}
}
