angerangel / lcr3d Goto Github PK

I don't know what kind of solid "dodecahedron.obj" is supposed to be, but it isn't a dodecahedron; those have 12 (pentagonal) faces (hence the name) and 20 vertices. The file "dodecahedron.obj" describes 50 triangular faces (that would be a pentacosahedron) and 15 vertices. (I find the idea of its dual, which would have 50 vertices for only 15 faces, mind-boggling.) Finally, simple numerical analysis shows that the purported solid cannot be real; 50 triangular faces means 75 edges, so this "solid" doesn't follow the rule that edges=faces+vertices-2.

If you try to load heart, sword or Klingon , you'll notice some wrong polygon. I suspect that is a math error. Livecode sometime tends to consider zero numbers near zero like 0.0000000008.
Is there a way to impose the math precision?

Would it be possible to support a subset of the OpenSCAD language, or to call OpenSCAD (as a module?) and then display the 3D object?

If you create your model and it seems all deformed, check camera position. If you change camera position, you solid will came back to normal.
If the camera is inside a solid, vertex position calculus is a mess.
For example, if you try to load this file, a simple cube:

OFF
8 6 12
0 0 0
1 0 0
1 1 0
0 1 0
0 0 1
1 0 1
1 1 1
0 1 1
4 0 1 2 3
4 7 6 5 4
4 1 5 6 2
4 3 2 6 7
4 4 5 1 0
4 3 7 4 0

You have to move the camera far from the cube.