public static Component_Mesh.StructureClass CreateMeshStructure(Face[] faces)
{
var result = new Component_Mesh.StructureClass();
int vertexMaxIndex = 0;
//faces
result.Faces = new Component_Mesh.StructureClass.Face[faces.Length];
for (int nFace = 0; nFace < faces.Length; nFace++)
{
var face = faces[nFace];
var triangles2 = new Component_Mesh.StructureClass.FaceVertex[face.Triangles.Length];
for (int n = 0; n < triangles2.Length; n++)
{
var faceVertex = face.Triangles[n];
triangles2[n] = new Component_Mesh.StructureClass.FaceVertex(faceVertex.Vertex, 0, faceVertex.RawVertex);
vertexMaxIndex = Math.Max(vertexMaxIndex, faceVertex.Vertex);
}
result.Faces[nFace] = new Component_Mesh.StructureClass.Face(triangles2, null, 0);
}
//edges
var edges = new ESet <Vector2I>(vertexMaxIndex * 3);
for (int nFace = 0; nFace < faces.Length; nFace++)
{
var face = faces[nFace];
var edgeCounts = new Dictionary <Vector2I, int>(face.Triangles.Length);
for (int nTriangle = 0; nTriangle < face.Triangles.Length / 3; nTriangle++)
{
var faceVertex0 = face.Triangles[nTriangle * 3 + 0];
var faceVertex1 = face.Triangles[nTriangle * 3 + 1];
var faceVertex2 = face.Triangles[nTriangle * 3 + 2];
void AddEdge(int vertex1, int vertex2)
{
int v1, v2;
if (vertex1 > vertex2)
{
v1 = vertex2;
v2 = vertex1;
}
else
{
v1 = vertex1;
v2 = vertex2;
}
var key = new Vector2I(v1, v2);
edgeCounts.TryGetValue(key, out var count);
edgeCounts[key] = count + 1;
}
AddEdge(faceVertex0.Vertex, faceVertex1.Vertex);
AddEdge(faceVertex1.Vertex, faceVertex2.Vertex);
AddEdge(faceVertex2.Vertex, faceVertex0.Vertex);
}
foreach (var pair in edgeCounts)
{
if (pair.Value == 1)
{
var edge = pair.Key;
edges.AddWithCheckAlreadyContained(new Vector2I(edge.X, edge.Y));
}
}
//for( int nTriangle = 0; nTriangle < face.Triangles.Length / 3; nTriangle++ )
//{
// var faceVertex0 = face.Triangles[ nTriangle * 3 + 0 ];
// var faceVertex1 = face.Triangles[ nTriangle * 3 + 1 ];
// var faceVertex2 = face.Triangles[ nTriangle * 3 + 2 ];
// void AddEdge( int vertex1, int vertex2 )
// {
// int v1, v2;
// if( vertex1 > vertex2 )
// {
// v1 = vertex2;
// v2 = vertex1;
// }
// else
// {
// v1 = vertex1;
// v2 = vertex2;
// }
// edges.AddWithCheckAlreadyContained( new Vector2I( v1, v2 ) );
// }
// AddEdge( faceVertex0.Vertex, faceVertex1.Vertex );
// AddEdge( faceVertex1.Vertex, faceVertex2.Vertex );
// AddEdge( faceVertex2.Vertex, faceVertex0.Vertex );
//}
}
result.Edges = edges.Select(e => new Component_Mesh.StructureClass.Edge(e.X, e.Y)).ToArray();
//vertices
result.Vertices = new Component_Mesh.StructureClass.Vertex[vertexMaxIndex + 1];
return(result);
}