} // pointer to e1 (forward) and e2 (backward) edges
public static LinkedList <IntersectionStructure> Create(MVertex intersectionPoint, STLEdge forwardEdge, STLEdge backwardEdge)
{
var iis = new LinkedList <IntersectionStructure>();
iis.AddLast(
new IntersectionStructure()
{
ForwardEdgeIntersectionPoint = intersectionPoint,
ForwardEdge = forwardEdge,
BackwardEdge = backwardEdge
}
);
return(iis);
}
public STLFacet(double[] normalsIn, double[] v0, double[] v1, double[] v2)
{
Normals = new STLNormals(normalsIn);
// sort input by their z positions
// but retain their counter-clockwise order using Flags
if (v0[2] >= v1[2] && v0[2] >= v2[2]) // v0 is greater
{
Vmax = new STLVertex(v0)
{
Flag = 0
};
if (v1[2] <= v2[2]) // v1 is lesser
{
Vmin = new STLVertex(v1)
{
Flag = 1
};
Vmid = new STLVertex(v2)
{
Flag = 2
};
OrientationType = OrientationType.TypeC;
}
else
{
Vmid = new STLVertex(v1)
{
Flag = 1
};
Vmin = new STLVertex(v2)
{
Flag = 2
};
OrientationType = OrientationType.TypeB;
}
}
else if (v1[2] >= v0[2] && v1[2] >= v2[2]) // v1 is greater
{
Vmax = new STLVertex(v1)
{
Flag = 1
};
if (v0[2] <= v2[2]) // v0 is lesser
{
Vmin = new STLVertex(v0)
{
Flag = 0
};
Vmid = new STLVertex(v2)
{
Flag = 2
};
OrientationType = OrientationType.TypeA;
}
else
{
Vmid = new STLVertex(v0)
{
Flag = 0
};
Vmin = new STLVertex(v2)
{
Flag = 2
};
OrientationType = OrientationType.TypeC;
}
}
else if (v2[2] >= v0[2] && v2[2] >= v1[2]) // v2 is greater
{
Vmax = new STLVertex(v2)
{
Flag = 2
};
if (v0[2] <= v1[2]) // v0 is lesser
{
Vmin = new STLVertex(v0)
{
Flag = 0
};
Vmid = new STLVertex(v1)
{
Flag = 1
};
OrientationType = OrientationType.TypeD;
}
else
{
Vmid = new STLVertex(v0)
{
Flag = 0
};
Vmin = new STLVertex(v1)
{
Flag = 1
};
OrientationType = OrientationType.TypeA;
}
}
EdgeS1 = new STLEdge
{
Start = Vmin,
End = Vmax
};
EdgeS2 = new STLEdge
{
Start = Vmin,
End = Vmid
};
EdgeS3 = new STLEdge
{
Start = Vmid,
End = Vmax
};
}
