1264b83cf0
git-svn-id: http://svn.berlios.de/svnroot/repos/oolite-linux/trunk@289 127b21dd-08f5-0310-b4b7-95ae10353056
119 lines
3.7 KiB
Python
Executable File
119 lines
3.7 KiB
Python
Executable File
#!/usr/bin/python
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"""
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This script takes a .dat file from the Elite/Oolite source
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and exports a .mesh file containing the same geometry.
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Polygons with more than 3 edges have to be exported as a series of triangles
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v0 v1 v2 v3 ... vn map to (v0 v1 v2) (v0 v2 v3) ... (v0 vn-1 vn)
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Edges are calculated for each triangle.
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Material for the faces is set to flat white (127,127,127)
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and surface normals need not be calculated.
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"""
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import sys, string, math
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inputfilenames = sys.argv[1:]
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print "converting..."
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print inputfilenames
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for inputfilename in inputfilenames:
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outputfilename = inputfilename.lower().replace(".dat",".mesh")
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print inputfilename+"->"+outputfilename
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inputfile = open(inputfilename,"r")
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lines = inputfile.read().splitlines(0)
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outputfile = open(outputfilename,"w")
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mode = 'SKIP'
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vertex_lines_out = ['VERTICES\r']
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tris_lines_out = ['MATERIAL\t65535\t65535\t65535\t0\t0\t0\r']
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extra_lines_out = []
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extra_lines_out.append( 'MATERIAL\t0\t0\t65535\t0\t0\t0\r')
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extra_lines_out.append( 'MATERIAL\t0\t65535\t0\t0\t0\t0\r')
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extra_lines_out.append( 'MATERIAL\t0\t65535\t65535\t0\t0\t0\r')
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extra_lines_out.append( 'MATERIAL\t65535\t0\t0\t0\t0\t0\r')
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extra_lines_out.append( 'MATERIAL\t65535\t0\t65535\t0\t0\t0\r')
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extra_lines_out.append( 'MATERIAL\t65535\t65535\t0\t0\t0\t0\r')
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extra_lines_out.append( 'MATERIAL\t32768\t32768\t32768\t0\t0\t0\r' )
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n_verts = 0
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n_v = 0
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n_faces = 0
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n_f = 0
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skips = 0
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vertex=[]
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edge=[]
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triangle=[]
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for line in lines:
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if (mode == 'VERTEX'):
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coordinates = string.split(line, ',') # split line by commas
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if (len(coordinates) == 3):
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x = float(coordinates[0])
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y = float(coordinates[1])
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z = float(coordinates[2])
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vertex.append( (x, y, z) )
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vertex_lines_out.append('%d\t%f\t%f\t%f\r' % (n_v, x, y, z))
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n_v = n_v + 1;
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elif (mode == 'FACES'):
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tokens = string.split(line, ',') # split line by commas
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if (len(tokens) > 9) :
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color_data = tokens[0:3]
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normal_data =tokens[3:6]
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n_points = tokens[6]
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point_data = tokens[7:]
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v1 = int(point_data[0])
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v2 = int(point_data[1])
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v3 = int(point_data[2])
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d0 = (vertex[v2][0]-vertex[v1][0], vertex[v2][1]-vertex[v1][1], vertex[v2][2]-vertex[v1][2])
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d1 = (vertex[v3][0]-vertex[v2][0], vertex[v3][1]-vertex[v2][1], vertex[v3][2]-vertex[v2][2])
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xp = (d0[1]*d1[2]-d0[2]*d1[1], d0[2]*d1[0]-d0[0]*d1[2], d0[0]*d1[1]-d0[1]*d1[0])
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det = 1.0 / math.sqrt(xp[0]*xp[0] + xp[1]*xp[1] + xp[2]*xp[2])
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norm = (xp[0]*det, xp[1]*det, xp[2]*det)
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if ((norm[0]*float(normal_data[0]) < 0)|(norm[1]*float(normal_data[1]) < 0)|(norm[2]*float(normal_data[2]) < 0)) :
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point_data.reverse()
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v1 = int(point_data[0])
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while (len(point_data) >= 3) :
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v2 = int(point_data[1])
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v3 = int(point_data[2])
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edge1 = (v1, v2)
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edge2 = (v1, v3)
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edge3 = (v2, v3)
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if (edge.count(edge1) == 0) :
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edge.append(edge1)
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if (edge.count(edge2) == 0) :
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edge.append(edge2)
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if (edge.count(edge3) == 0) :
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edge.append(edge3)
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triangle.append( (v1,v2,v3) )
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tris_lines_out.append('%d\t%d\t%d\r' % (v1,v2,v3))
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point_data = point_data[1:] # move on a point
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#
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elif (mode == 'SKIP'):
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skips = skips + 1
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#
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if (line[:6] == 'NVERTS'):
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mode = 'SKIP'
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if (line[:6] == 'NFACES'):
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mode = 'SKIP'
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if (line[:6] == 'VERTEX'):
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mode = 'VERTEX'
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if (line[:5] == 'FACES'):
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mode = 'FACES'
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#
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outputfile.write('Mesh\t1\t1\r')
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outputfile.writelines(vertex_lines_out)
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outputfile.write('EDGES\r')
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for v0 in range(len(vertex)):
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for v1 in range(len(vertex)):
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if (edge.count((v0,v1)) > 0):
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outputfile.write('%d\t%d\r' % (v0,v1))
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edge.remove((v0,v1))
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outputfile.writelines(tris_lines_out)
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outputfile.writelines(extra_lines_out)
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outputfile.write('END\r')
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outputfile.close();
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print "done"
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print ""
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#
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# end
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#
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