stm31415 wrote:

> 
> I suppose I should ask, do you (either of you) use mesh2 or
> mesh?

I write out the final mesh in mesh2 format, but I switch around between 
storing the triangles in array formats similar to both.

// similar to "mesh"
#local aMesh = array[1][3] { { <0,0,0>, <1,1,0>, <1,0,1> } }

// similar to "mesh2"
#local aMeshV = array[3] { <0,0,0>, <1,1,0>, <1,0,1> }
#local aMeshI = array[1][3] { 0, 1, 2 }

> I can't see how you can get your SDL to keep track of which
> points belong to which edge of which face. It looks like I'll
> be in low-chart mode for a while...

I'm a bad example. I do it differently almost every time. What you can 
do is use an array of arrays. For example, here's a tetrahedron where 
every vertex "knows" its edges and faces:

#local aTet = array[4] { // one 3D array per vertex
   array[3] { // D1=Location D2=Edges D3=Faces
     array[1] { <0,0,0> } // the vertex
     array[3][2] { // the vertex' three edges
       { <0,0,0>, <1,0,1> },
       { <0,0,0>, <1,1,0> },
       { <0,0,0>, <0,1,1> }
     }
     array[3][3] { // the vertex' three faces
       { <0,0,0>, <1,0,1>, <1,1,0> },
       { <0,0,0>, <1,1,0>, <0,1,1> },
       { <0,0,0>, <0,1,1>, <1,0,1> }
     }
   } // end firse vertex
   array[3] ... // second vertex
   array[3] ... // third vertex
   array[3] ... // fourth vertex
} // end of tetrahedron

Lot of redundancy, but it's just an example. In practice, you'd probably 
just put the four vertices in their own array and then fill this larger 
array with indices of the vertex list array. You can just keep adding 
arrays of arrays of arrays until you get all of the information you need 
for whatever you're doing. This is one way I've done it. This is cool in 
a way and how I did the temple, but I'll probably go back to dozens of 
small arrays in the future. Dozens of smaller arrays makes for cleaner 
looking code IMO.

Something like:
#local aTetVertLocations = array[4] ...
#local aTetVertEdges = array[4][2] ...
#local aTetVertFaces = array[4][3] ...

  -Shay

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