public static sbyte MapFrontTo(sbyte side, sbyte facelet)
{
FaceLayout3D refference = Face3DLayouts[side];
// i - > order[i]
return(refference.order[facelet]);
}
public static sbyte MapFrontFrom(sbyte side, sbyte facelet)
{
FaceLayout3D refference = Face3DLayouts[side];
// order[i] - > i
return(refference.reverseOrder[facelet]);
}
static FaceLayout3D()
{
/* A cube has six faces, lets name them 0-5
* 0 F = front face
* 1 R = right face
* 2 U = up face
* 3 L = left face
* 4 D = down face
* 5 B = back face
* ___
* /2 /|
* /__/ | 5
* | |1|
* 3 | 0 | /
* |___|/
* 4
* If we open them into 2 dimensions:
* ___
* | |
* | 2 |
* ___|___|___
* | | | |
* | 3 | 0 | 1 |
* |___|___|___|
* | |
* | 4 |
* |___|
* | |
* | 5 |
* |___|
*
* If we change the front side and right side, we will get these results:
*
* ___ ___ ___
* | | | | | |
* | 0 | | 0 | | 0 |
* ___|___|___ ___|___|___ ___|___|___
* | | | | | | | | | | | |
* | 4 | 1 | 2 | | 1 | 2 | 3 | | 2 | 3 | 4 |
* |___|___|___| |___|___|___| |___|___|___|
* | | | | | |
* | 5 | | 5 | | 5 |
* |___| |___| |___|
* | | | | | |
* | 3 | | 4 | | 1 |
* |___| |___| |___|
*
* ___ ___
* | | | |
* | 0 | | 4 |
* ___|___|___ ___|___|___
* | | | | | | | |
* | 3 | 4 | 1 | | 3 | 5 | 1 |
* |___|___|___| |___|___|___|
* | | | |
* | 5 | | 2 |
* |___| |___|
* | | | |
* | 2 | | 0 |
* |___| |___|
*
*/
//we'll record the above result in a mattrix:
Face3DLayouts = new FaceLayout3D[6];
Face3DLayouts[0] = new FaceLayout3D(0, 1, 2, 3, 4, 5);
Face3DLayouts[1] = new FaceLayout3D(1, 2, 0, 4, 5, 3);
Face3DLayouts[2] = new FaceLayout3D(2, 3, 0, 1, 5, 4);
Face3DLayouts[3] = new FaceLayout3D(3, 4, 0, 2, 5, 1);
Face3DLayouts[4] = new FaceLayout3D(4, 1, 0, 3, 5, 2);
Face3DLayouts[5] = new FaceLayout3D(5, 1, 4, 3, 2, 0);
//Note, the above matrix is not symetric.
//If we number the faces in a symetic way, the matrix would look more regular: 0->0, 1->1, 2->2, 3->4, 4->5, 5>3
}
