public Triangle(Triangle triangle)
{
OrientationPlane = triangle.OrientationPlane;
A = triangle.A;
B = triangle.B;
C = triangle.C;
}
public Triangle(Vertex a, Vertex b, Vertex c)
{
OrientationPlane = Plane.BuildFromVertices(a.Position, b.Position, c.Position);
A = a;
B = b;
C = c;
}
public Vertex(Vertex vertex)
{
Position = vertex.Position;
Normal = vertex.Normal;
Tangent = vertex.Tangent;
UV1 = vertex.UV1;
UV2 = vertex.UV2;
Color = vertex.Color;
}
public void Invert()
{
OrientationPlane.Invert ();
A.Invert();
B.Invert();
C.Invert();
Vertex temp = A;
A = C;
C = temp;
}
public Vertex Lerped (Vertex dest, float t)
{
Vertex lerped;
lerped.Position = Position.Lerped (dest.Position, t);
lerped.Normal = Normal.Lerped (dest.Normal, t);
lerped.Tangent = Tangent.Lerped (dest.Tangent, t);
lerped.UV1 = UV1.Lerped (dest.UV1, t);
lerped.UV2 = UV2.Lerped (dest.UV2, t);
lerped.Color = Color.Lerped (dest.Color, t);
return lerped;
}
public void SetVertexByIndex(int index, Vertex vertex)
{
switch(index)
{
case 1:
B = vertex;
break;
case 2:
C = vertex;
break;
default:
A = vertex;
break;
}
}
/**
* Classify @vertex based on which side of @plane it lies.
*/
private static Orientation ClassifyVertexOrientation(Vertex vertex, Plane plane)
{
float diff = plane.Normal.Dot(vertex.Position) - plane.D;
if(diff < -SplitEpsilon)
return Orientation.LessThan;
else if(diff > SplitEpsilon)
return Orientation.GreaterThan;
else
return Orientation.CoPlanar;
}
