[Bf-python] Question to surface-script

[Thomas Bleicher]

On 25.12.2005, at 13:40, Thomas Buschhardt wrote:

Hi, and happy christmas as well.

> Hallo,
> I need a little bit help. I have a ASCII-file with 3D-coordinates of 8
> mil. points (vertexes). I put these points in blender. Now my problem:
> It's possible with an internal method of blender or a cool
> script/function to make a surface (like a landscape)?

I don't know about an internal method (and I doubt its existance).

It's simple if your vertices are on a regular grid:

IIRC there is a limit for Blender meshes of 64k vertices. So you will
have to divide your 8 mil. points in smaller patches and create  
individual
mesh objecs out of these.

I have not done this for a long time so the details of the API may have
changed but in pseudocode for each patch the sequence would be:

mesh = NMesh.New("patch_x_y")

patch = []
for row_data in patch_data:
     row = []
     for x,y,z in row_data:
         v = NMesh.Vert(x,y,z)
         add v to mesh # ??
         row.append(v)
     patch.append(row)

for y in range(len(patch)-1):
     for x in range(len(row)-1): # all rows of same size!
         v1 = patch[  y][  x]
         v2 = patch[  y][x+1]
         v3 = patch[y+1][x+1]
         v4 = patch[y+1][  x]
         face = NMesh.Face([v1,v2,v3,v4])
         add face to mesh # ??

mesh.update()

I don't know about the "# ??" lines but you should find examples how
to add face and vertices in other scripts. I do remember a script
to import geographic data files but I can't remember the URL, sorry.
Look around in the scripts sections of elysiun.com.

If you don't have data as an x-y-grid you will have to work out how
to create triangles or quad faces first. This will be more complicated
than the mesh creation itself.

Thomas