/usr/share/games/kiki-the-nano-bot/py/obj.py is in kiki-the-nano-bot-data 1.0.2+dfsg1-6build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# .................................................................................................................
# ObjFileConverter
#
# creates header files from .obj models
# .................................................................................................................
class ObjFileConverter:
"""loads a .obj file and writes a .h header file with arrays for triangles, quads, triangle fans and quad strips"""
# ................................................................................................................
def __init__(self, file_path, object_name = ""):
"""initialization with path to .obj file and optional object name"""
try:
file = open (file_path, "r")
self.file_path = file_path
except:
try:
file = open (file_path + ".obj", "r")
self.file_path = file_path + ".obj"
except:
print "[*** Error ***] unable to open file", file_path
return
if object_name:
self.object_name = object_name
else:
self.object_name = self.file_path[:self.file_path.find(".")]
self.dir_path = os.path.dirname (self.file_path)
if self.dir_path: self.dir_path += "/"
self.lines = file.readlines()
self.line = 0
self.vertices = []
self.normals = []
self.quads = []
self.triangles = []
self.strips = []
self.fans = []
self.parseObjects()
self.optimizeFaces()
print "\nsummary:"
print "vertices/normals:", len (self.vertices), len (self.normals)
print "triangles: ", len (self.triangles)
print "quads: ", len (self.quads)
print "fans: ", len (self.fans)
print "strips: ", len (self.strips)
self.generateArrays()
# ................................................................................................................
def parseObjects (self):
"""collects objects"""
if self.line >= len(self.lines): return
while self.lines[self.line][0:2] <> "o ":
self.line += 1
if self.line >= len(self.lines): return
print "\nobject", self.lines[self.line][2:]
num_v = len (self.vertices)
num_n = len (self.normals)
num_t = len (self.triangles)
num_q = len (self.quads)
self.parseVertices()
self.parseNormals()
self.parseFaces()
print "vertices/normals:", len (self.vertices) - num_v, len (self.normals) - num_n
print "triangles: ", len (self.triangles) - num_t
print "quads: ", len (self.quads) - num_q
print ""
self.parseObjects()
# ................................................................................................................
def parseVertices (self):
"""collects vertices"""
while self.lines[self.line][0:2] <> "v ":
self.line += 1
while self.lines[self.line][0:2] == "v ":
self.vertices.append (map(float, self.lines[self.line][2:].split()))
self.line += 1
# ................................................................................................................
def parseNormals (self):
"""collects normals"""
while self.lines[self.line][0:2] == "vn":
normal_coords = map (float, self.lines[self.line][2:].split())
link = false
for normal in self.normals:
if normal == normal_coords:
link = self.normals.index(normal)
break
if link:
self.normals.append (link)
else:
self.normals.append (normal_coords)
self.line += 1
# ................................................................................................................
def parseFaces (self):
"""collects faces into triangle and quad lists"""
while self.lines[self.line][0:2] <> "f ":
self.line += 1
while self.lines[self.line][0:2] == "f ":
zipped_list = map (lambda s: (int(s.split("//")[0])-1, int(s.split("//")[1])-1), \
self.lines[self.line][2:].split())
vertex_list = map (lambda s: s[0], zipped_list)
normal_list = map (lambda s: s[1], zipped_list)
for normal_index in normal_list:
if type (self.normals[normal_index]) == types.IntType:
vertex_list.append (self.normals[normal_index])
else:
vertex_list.append (normal_index)
if len (vertex_list) == 6:
self.triangles.append (vertex_list)
else:
self.quads.append (vertex_list)
self.line += 1
if self.line >= len (self.lines):
return
# ................................................................................................................
def optimizeFaces (self):
"""creates triangle fans and quad strips from collected triangles and quads"""
def shift_quad (quad, shift=-2):
return quad[(4-shift)%4:4] + quad[:(4-shift)%4] + \
quad[4+(4-shift)%4:] + quad[4:4+(4-shift)%4]
def shift_triangle (triangle, shift):
return triangle[(3-shift)%3:3] + triangle[:(3-shift)%3] + \
triangle[3+(3-shift)%3:] + triangle[3:3+(3-shift)%3]
def equal_quad (q, p):
for i in range(1,5):
s = shift_quad(p, i)
if q == s: return i
return 0
# ................................................................... quad strips
strips = [] # seed strip search with pairs
# of neighboring quads
for quad in self.quads: # for each quad
for q in self.quads[self.quads.index(quad)+1:]: # loop over remaining quads
for i in range(4): # search for same edge
for j in range(4):
squad = shift_quad (quad, 2-i)
sq = shift_quad (q, -((i+j)%4))
if squad[2] == sq[1] and squad[3] == sq[0] and \
squad[6] == sq[5] and squad[7] == sq[4]: # same edge found
strips.append ([squad, sq]) # create new strip
if len (strips):
remove = 1
while remove:
for strip in strips: # for each strip
remove = []
s1 = strip
for s2 in strips[strips.index(s1)+1:]: # loop over other strips
if s1[-1][:4] == s2[0][:4]: # join, if matching
s1 = s1 + s2[1:] # head or tail
remove.append (s2)
elif s2[-1][:4] == s1[0][:4]:
s1 = s2 + s1[1:]
remove.append (s2)
elif s1[0][:4] == shift_quad (s2[0])[:4]: # eventually reverse
reversed = map (shift_quad, s2) # other strip
reversed.reverse()
s1 = reversed + s1[1:]
remove.append (s2)
elif s1[-1][:4] == shift_quad (s2[-1])[:4]:
reversed = map (shift_quad, s2)
reversed.reverse()
s1 = s1 + reversed[1:]
remove.append (s2)
if remove: # if strips have been joined
strips.remove (strip) # remove joined strips
for s in remove:
if s in strips:
strips.remove (s)
strips.insert (0, s1) # insert join
strips.sort (lambda a, b: len (b) - len (a)) # sort strips by length
for strip in strips: # filter strips ...
use_strip = 1
for quad in strip: # loop over quads in strip
found = 0 # and search them in quadlist
for q in self.quads:
if equal_quad (quad, q): # quad found
found = 1 # continue with next quad
break
if not found: # quad not found
use_strip = 0 # don't use strip
break
if use_strip: # no used quad found
self.strips.append (strip) # store strip
for quad in strip: # remove its quads from quadlist
index = 0
while index < len (self.quads):
if equal_quad (quad, self.quads[index]):
del self.quads[index]
else:
index += 1
# ................................................................... triangle fans
fans = {}
for triangle in self.triangles:
for t in self.triangles:
for i in range (3):
for j in range (3):
if triangle[i] == t[(i+j)%3] and triangle[(i+2)%3] == t[(i+j+1)%3] and \
triangle[i+3] == t[(i+j)%3+3] and triangle[(i+2)%3+3] == t[(i+j+1)%3+3]:
if triangle[i] in fans:
fan = fans[triangle[i]]
if fan[-1] == triangle:
fan.append (t)
elif fan[0] == t:
fan.insert (0, triangle)
else:
fans[triangle[i]] = [triangle, t]
for fan in fans:
if fans[fan][0] == fans[fan][-1]:
fans[fan].pop()
fans = fans.values()
fans.sort (lambda a, b: len (b) - len (a))
for fan in fans:
use_fan = 0
for triangle in fan:
if triangle in self.triangles:
use_fan = 1
self.triangles.remove (triangle)
if use_fan: self.fans.append (fan)
for fan in self.fans:
for index in range (len(fan)-1):
t1 = fan[index]
t2 = fan[index+1]
for i in range(3):
for j in range(3):
if t1[i] == t2[(i+j)%3] and t1[(i+2)%3] == t2[(i+j+1)%3]:
fan[index] = shift_triangle (t1,-i)
fan[index+1] = shift_triangle (t2,-(i+j)%3)
# ................................................................................................................
def generateArrays (self):
"""writes the header file with arrays for the collected triangles, quads, fans and strips"""
result = []
result.append ("#ifndef __obj_%s" % (self.object_name,))
result.append ("#define __obj_%s" % (self.object_name,))
# ................................................................... render macro
result.append ("\n#define render_%s { \\" % (self.object_name,))
if self.triangles:
result.append (" glInterleavedArrays (GL_N3F_V3F, 0, %sInterleavedTriangles); \\" % \
(self.object_name,))
result.append (" glDrawArrays (GL_TRIANGLES, 0, %sNumTriangles*3); \\" % \
(self.object_name,))
if self.quads:
result.append (" glInterleavedArrays (GL_N3F_V3F, 0, %sInterleavedQuads); \\" % \
(self.object_name,))
result.append (" glDrawArrays (GL_QUADS, 0, %sNumQuads*4); \\" % (self.object_name,))
if self.strips:
result.append (" glInterleavedArrays (GL_N3F_V3F, 0, %sInterleavedQuadStrips); \\" % \
(self.object_name,))
result.append (" for (int i = 0; i < %sNumQuadStrips; i++) { \\" % (self.object_name,))
result.append (" glDrawArrays (GL_QUAD_STRIP, %sQuadStripIndices[i]/6, \\" % (self.object_name,))
result.append (" (%sQuadStripIndices[i+1] - %sQuadStripIndices[i])/6); \\" % \
(self.object_name, self.object_name))
result.append (" } \\")
if self.fans:
result.append (" glInterleavedArrays (GL_N3F_V3F, 0, %sInterleavedTriangleFans); \\" % \
(self.object_name,))
result.append (" for (int i = 0; i < %sNumTriangleFans; i++) { \\" % (self.object_name,))
result.append (" glDrawArrays (GL_TRIANGLE_FAN, %sTriangleFanIndices[i]/6, \\" % \
(self.object_name,))
result.append (" (%sTriangleFanIndices[i+1] - %sTriangleFanIndices[i])/6); \\" % \
(self.object_name, self.object_name))
result.append (" } \\")
result.append ("}\n")
# ................................................................... triangles
if self.triangles:
result.append ("static int %sNumTriangles = %d;" % \
(self.object_name, len (self.triangles)))
result.append ("static float %sInterleavedTriangles[%d] = {" % \
(self.object_name, len (self.triangles)*18))
for triangle in self.triangles:
line = ""
for i in range (3):
line += "%6.3f, %6.3f, %6.3f," % tuple (self.normals[triangle[i+3]])
line += "%6.3f, %6.3f, %6.3f,\n" % tuple (self.vertices[triangle[i]])
result.append (line)
result.append("};\n")
# ................................................................... quads
if self.quads:
result.append("static int %sNumQuads = %d;" % (self.object_name, len (self.quads)))
result.append("static float %sInterleavedQuads[%d] = {" % \
(self.object_name, len (self.quads)*24))
for quad in self.quads:
line = ""
for i in range (4):
line += "%6.3f, %6.3f, %6.3f," % tuple (self.normals[quad[i+4]])
line += "%6.3f, %6.3f, %6.3f,\n" % tuple (self.vertices[quad[i]])
result.append (line)
result.append("};\n")
# ................................................................... quad strips
if self.strips:
result.append("static int %sNumQuadStrips = %d;\n" % (self.object_name, len (self.strips)))
line = "static int %sQuadStripIndices[%d] = { " % (self.object_name, len (self.strips)+1)
index = 0
for strip in self.strips:
line += "%d, " % (index,)
index += len (strip) * 12 + 12
line += "%d" % (index,)
result.append(line + " };\n")
result.append("static float %sInterleavedQuadStrips[%d] = {" % (self.object_name, index))
for strip in self.strips:
line = ""
line += "%6.3f, %6.3f, %6.3f, " % tuple (self.normals[strip[0][4]])
line += "%6.3f, %6.3f, %6.3f, " % tuple (self.vertices[strip[0][0]])
line += "%6.3f, %6.3f, %6.3f, " % tuple (self.normals[strip[0][5]])
line += "%6.3f, %6.3f, %6.3f," % tuple (self.vertices[strip[0][1]])
result.append(line)
for quad in strip:
line = ""
line += "%6.3f, %6.3f, %6.3f, " % tuple (self.normals[quad[7]])
line += "%6.3f, %6.3f, %6.3f, " % tuple (self.vertices[quad[3]])
result.append (line)
line = ""
line += "%6.3f, %6.3f, %6.3f, " % tuple (self.normals[quad[6]])
line += "%6.3f, %6.3f, %6.3f, " % tuple (self.vertices[quad[2]])
result.append (line)
result.append("};\n")
# ................................................................... fans
if self.fans:
result.append("static int %sNumTriangleFans = %d;\n" % (self.object_name, len (self.fans)))
line = "static int %sTriangleFanIndices[%d] = { " % (self.object_name, len (self.fans)+1)
index = 0
for fan in self.fans:
line += "%d, " % (index,)
index += len (fan) * 6 + 12
line += "%d" % (index,)
result.append(line + " };\n")
result.append("static float %sInterleavedTriangleFans[%d] = {" % (self.object_name, index))
for fan in self.fans:
line = ""
line += "%6.3f, %6.3f, %6.3f, " % tuple (self.normals[fan[0][0+3]])
line += "%6.3f, %6.3f, %6.3f, " % tuple (self.vertices[fan[0][0]])
line += "%6.3f, %6.3f, %6.3f, " % tuple (self.normals[fan[0][1+3]])
line += "%6.3f, %6.3f, %6.3f, " % tuple (self.vertices[fan[0][1]])
result.append(line)
for triangle in fan:
line = ""
line += "%6.3f, %6.3f, %6.3f, " % tuple (self.normals[triangle[2+3]])
line += "%6.3f, %6.3f, %6.3f, " % tuple (self.vertices[triangle[2]])
result.append (line)
result.append("};\n")
result.append ("#endif // __obj_%s" % (self.object_name,))
# ................................................................... save header file
file_path = self.dir_path + self.object_name + ".h"
try:
file = open (file_path, "w")
except:
print "[*** Error ***] unable to open file for writing ", file_path
return 0
file.write("\n".join(result))
file.close()
print "\noutput written to", file_path
file_path = "/Users/kodi/Projects/kiki/src/items/" + self.object_name + ".h"
try:
file = open (file_path, "w")
except:
print "[*** Error ***] unable to open file for writing ", file_path
return 0
file.write("\n".join(result))
file.close()
print "\noutput written to", file_path
#ObjFileConverter("/Users/kodi/Projects/kiki/misc/objects/body.obj", "body")
#ObjFileConverter("/Users/kodi/Projects/kiki/misc/objects/test.obj", "test")
#ObjFileConverter("/Users/kodi/Projects/kiki/misc/objects/gear.obj", "gear")
#ObjFileConverter("/Users/kodi/Projects/kiki/misc/objects/valve.obj", "valve")
#ObjFileConverter("/Users/kodi/Projects/kiki/misc/objects/cylinder.obj", "cylinder")
#ObjFileConverter("/Users/kodi/Projects/kiki/misc/objects/wire.obj", "wire")
#ObjFileConverter("/Users/kodi/Projects/kiki/misc/objects/motor.obj", "motor")
#ObjFileConverter("/Users/kodi/Projects/kiki/misc/objects/generator.obj", "generator")
#ObjFileConverter("/Users/kodi/Projects/kiki/misc/objects/kolben.obj", "kolben")
#ObjFileConverter("/Users/kodi/Projects/kiki/misc/objects/tire.obj", "tire")
#ObjFileConverter("/Users/kodi/Projects/kiki/misc/objects/cross_tire.obj", "cross_tire")
#ObjFileConverter("/Users/kodi/Projects/kiki/misc/objects/wirestone.obj", "wirestone")
ObjFileConverter("/Users/kodi/Projects/kiki/misc/objects/mutant.obj", "mutant")
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