|
 |
Anton Sherwood wrote:
>
> Margus Ramst wrote:
> > When I tried something similar, the only way I could figure out how to
> > split the cube was into 5 tetrahedrons (4 with faces coinciding with
> > cube faces, 1 "in the middle"); how did you distribute the 6 ones?
>
> One way is to start with a diagonal of the cube as an edge common to all
> six. Is there another?
>
Yes, the one used initially by Warp (it is in the code, you should have looked)
TesselateTetrahedron(&info,0,4,2,1,Sm); /* 1 */
TesselateTetrahedron(&info,6,4,2,1,Sm); /* 2 */
TesselateTetrahedron(&info,6,3,2,1,Sm); /* 3 */
TesselateTetrahedron(&info,4,5,6,1,Sm); /* 4 */
TesselateTetrahedron(&info,5,6,3,1,Sm); /* 5 */
TesselateTetrahedron(&info,6,3,7,5,Sm); /* 6 */
Assuming you're at -z, looking to +z, left is -x and up is y
1: bottom left corner of the cube in front of you
6: top right corner of the cube away
union(2,3,4,5) is a slice of the cube between two parallel planes.
one diagonal of the cube is used as a common segment (from
the left bottom corner away to the top right corner near you).
2: opposite segment is the diagonal of the front face (top left to bottom
right).
3: opposite segment is the top segment on the left face.
4: opposite segment is the bottom segment on the right face.
5: opposite segment is the diagonal of the back face (top left to bottom right)
Hope this help you see the split.
Post a reply to this message
|
|
edu