public StlTriangle(StlNormal normal, StlVertex v1, StlVertex v2, StlVertex v3)
{
Normal = normal;
Vertex1 = v1;
Vertex2 = v2;
Vertex3 = v3;
}
public StlTriangle(StlNormal normal, StlVertex v1, StlVertex v2, StlVertex v3)
{
Normal = normal;
Vertex1 = v1;
Vertex2 = v2;
Vertex3 = v3;
}
public StlTriangle(StlNormal normal, StlVertex vertex1, StlVertex vertexv2, StlVertex vertex3)
{
Normal = normal;
Vertex1 = vertex1;
Vertex2 = vertexv2;
Vertex3 = vertex3;
}
public StlNormal NormalFromVertices(IList <StlVertex> vertices)
{
double[] v0 = new double[] {
vertices[1].X - vertices[0].X,
vertices[1].Y - vertices[0].Y,
vertices[1].Z - vertices[0].Z
};
double[] v1 = new double[] {
vertices[2].X - vertices[0].X,
vertices[2].Y - vertices[0].Y,
vertices[2].Z - vertices[0].Z
};
double x = v0[1] * v1[2] - v1[1] * v0[2];
double y = -(v0[0] * v1[2] - v0[2] * v1[0]);
double z = v0[0] * v1[1] - v1[0] * v0[1];
StlNormal crossVector = new StlNormal((float)x, (float)y, (float)z);
return(crossVector);
} //Calculate the Normal Vector from the vertices
