/usr/share/pyshared/soya/blendercal/bcobject.py is in python-soya 0.15~rc1-10.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# $Id: bcobject.py 426 2006-10-03 15:04:31Z cubicool $
import Blender
import blendercal
import bcconf
import bcgui
# We use immutable sets in the LOD algorithm
# to identify unique edges and faces. Immutable
# sets are handy for identification because they're
# hashable and unordered.
from sets import ImmutableSet
CONCAT = lambda s, j="": j.join([str(v) for v in s])
STRFLT = lambda f: "%%.%df" % bcconf.FLOATPRE % f
class Cal3DObject(object):
# The base class for all of the bcobject classes. Children of this class must
# define a method called XML which should build and return an XML representation
# of the object. Furthermore, children that pass a value in the constructor
# for the magic parameter are treated as top-level XML files and preprend
# the appropriate headers.
def __init__(self, magic=None):
self.__magic = magic
def __repr__(self):
ret = ""
xml = self.XML().replace("\t", "").replace("#", " " * bcconf.XMLINDENT)
if self.__magic:
ret += """<?xml version="1.0"?>\n"""
ret += """<HEADER MAGIC="%s" VERSION="1200"/>\n""" % self.__magic
return ret + xml
def __str__(self):
return self.__repr__()
def XML(self):
raise AttributeError, "Children must define this method!"
class Material(Cal3DObject):
MATERIALS = {}
def __init__(self, name, ambient=[255]*4, diffuse=[255]*4, specular=[255]*4, mapnames=None):
Cal3DObject.__init__(self, "XRF")
self.name = name
self.ambient = ambient
self.diffuse = diffuse
self.specular = specular
self.shininess = 1.0
self.mapnames = []
self.id = len(Material.MATERIALS)
mapnames and self.mapnames.extend(mapnames)
Material.MATERIALS[self.name] = self
def XML(self):
mapXML = ""
for mapname in self.mapnames:
mapXML += "#<MAP>" + mapname + "</MAP>\n"
return """\
<MATERIAL NUMMAPS="%s">
#<AMBIENT>%s %s %s %s</AMBIENT>
#<DIFFUSE>%s %s %s %s</DIFFUSE>
#<SPECULAR>%s %s %s %s</SPECULAR>
#<SHININESS>%s</SHININESS>
%s</MATERIAL>
""" % (
len(self.mapnames),
self.ambient[0],
self.ambient[1],
self.ambient[2],
self.ambient[3],
self.diffuse[0],
self.diffuse[1],
self.diffuse[2],
self.diffuse[3],
self.specular[0],
self.specular[1],
self.specular[2],
self.specular[3],
self.shininess,
mapXML
)
class Mesh(Cal3DObject):
def __init__(self, name):
Cal3DObject.__init__(self, "XMF")
self.name = name.replace(".", "_")
self.submeshes = []
def XML(self):
return """\
<MESH NUMSUBMESH="%s">
%s</MESH>
""" % (
len(self.submeshes),
CONCAT(self.submeshes)
)
class SubMesh(Cal3DObject):
def __init__(self, mesh, material):
Cal3DObject.__init__(self)
self.material = material
self.vertices = []
self.faces = []
self.springs = []
self.mesh = mesh
self.num_lodsteps = 0
mesh.submeshes.append(self)
if not material: self.material = Material("Default")
# These are all small classes for the creation of a very specific,
# temporary data structure for LOD calculations. The entire submesh
# will be temporarily copied into this structure, to allow more freedom
# in on-the-fly refactorizations and manipulations.
class LODVertex:
"""We need to factor in some other information, compared
to standard vertices, like edges and faces. On the other hand,
we don't really need stuff like UVs when we do this. Doing another
small, inner Vertex class for this, will hopefully not be
seen as a total waste."""
def __init__(self, origindex, loc, cloned):
self.id = origindex
self.loc = Blender.Mathutils.Vector(loc)
self.edges = {}
self.faces = {}
self.cloned = cloned
self.col_to = None
self.col_from = None
self.face_collapses = 0
self.deathmarked = False
def colto(self):
if self.col_to:
cvert = self.col_to
while cvert.col_to:
cvert = cvert.col_to
return cvert
else:
return self
def colfrom(self):
if self.col_from:
cvert = self.col_from
while cvert.col_from:
cvert = cvert.col_from
return cvert
else:
return self
def getid(self):
return self.colto().id
def getloc(self):
return self.colto().loc
def getfaces(self, facel = None):
if not facel:
facelist = []
else:
facelist = facel
for face in self.faces.values():
if (not face.dead) and (not facelist.__contains__(face)):
facelist.append(face)
if self.col_from:
facelist = self.col_from.getfaces(facelist)
return facelist
def getedges(self, edgel = None):
if not edgel:
edgelist = []
else:
edgelist = edgel
for edge in self.edges.values():
if (not edge.dead) and (not edgelist.__contains__(edge)):
edgelist.append(edge)
if self.col_from:
edgelist = self.col_from.getedges(edgelist)
return edgelist
class LODFace:
def __init__(self, verts, fid):
self.verts = verts
vertset = ImmutableSet((self.verts[0].id, self.verts[1].id, self.verts[2].id))
for vert in self.verts:
vert.faces[self.getHashableSet()] = self
self.id = fid
self.edges = []
self.RefactorArea()
self.dead = False
def replaceVert(self, replacev, withv):
i = self.verts.index(replacev)
self.verts[i] = withv
# def Refactor(self):
# self.RefactorArea()
def RefactorArea(self):
crossp = Blender.Mathutils.CrossVecs(self.verts[1].getloc() - self.verts[2].getloc(),
self.verts[0].getloc() - self.verts[2].getloc())
self.area = (1./2.)*((crossp.x**2 + crossp.y**2 + crossp.z**2)**(1./2.))
def getHashableSet(self):
return ImmutableSet((self.verts[0].id, self.verts[1].id, self.verts[2].id))
class LODEdge:
"""Extra, inner class used for the temporary LOD datastructure"""
def __init__(self, v1, v2):
self.v1 = v1
self.v2 = v2
vertset = ImmutableSet((self.v1.id, self.v2.id))
self.v1.edges[vertset] = self
self.v2.edges[vertset] = self
# Get faces common for both v1 and v2
self.faces = []
#for key in filter(self.v1.faces.__contains__, self.v2.faces):
# face = self.v1.faces[key]
#self.faces[ImmutableSet((face.verts[0].id, face.verts[1].id, face.verts[2].id))] = face
# self.faces.append(face)
self.collapsed_faces = {}
self.RefactorLength()
self.dead = False
def getOtherVert(self, vertex):
if vertex == self.v1:
return self.v2
elif vertex == self.v2:
return self.v1
def Refactor(self):
self.RefactorLength()
self.RefactorWeight()
def RefactorLength(self):
self.length = (self.v2.getloc() - self.v1.getloc()).length
def RefactorWeight(self):
# Determine which vert to collapse to which,
# using jiba's method of basing this decision on
# The number of edges connected to each vertex
# I.e.: Collapse the edge with least amount of edges.
# The order of the vertices in v1, v2 do not matter in
# any other respect, so we simply use this order, and
# say we collapse v1 into v2.
if len(self.v1.getedges()) > len(self.v2.getedges()):
self.v1, self.v2 = self.v2, self.v1
# Get total area of faces surrounding edge
area = 0
for face in self.faces:
area += face.area
proportional_area = area / avg_area
proportional_length = self.length / avg_length
# Get dot products (angle sharpness) of edges connected to v1
edgeverts_factor = 0
self_vec = self.v2.getloc() - self.v1.getloc()
self_vec.normalize()
for edge in self.v1.edges.values():
if edge != self:
edgevert = edge.getOtherVert(self.v1)
edge_vec = edgevert.getloc() - self.v1.getloc()
edge_vec.normalize()
edgeverts_factor += (1 - Blender.Mathutils.DotVecs(self_vec, edge_vec))/2
# Get dot products of edges connected to v2. Wohoo, copy-paste!
self_vec = self.v1.getloc() - self.v2.getloc()
self_vec.normalize()
for edge in self.v2.edges.values():
if edge != self:
edgevert = edge.getOtherVert(self.v2)
edge_vec = edgevert.getloc() - self.v2.getloc()
edge_vec.normalize()
edgeverts_factor += (1 - Blender.Mathutils.DotVecs(self_vec, edge_vec))/2
# Error metric, or magic formula. Whatever you like to call it.
# This calculates the weight of the edge, based on the
# information we have now gathered. We can change this at
# any time to try and get better results.
self.weight = proportional_area * proportional_length * edgeverts_factor
#self.weight = proportional_length
return self.weight
def getHashableSet(self):
return ImmutableSet((self.v1.id, self.v2.id))
def collapse(self):
if self.v1.col_to or self.v2.col_to:
return False
if self.v1.cloned or self.v2.cloned:
return False
if len(self.faces) < 2:
return False
self.dead = True
# Mark all faces as dead and the two
# collapsed edges as dead
for face in filter(self.v1.getfaces().__contains__, self.v2.getfaces()):
# If not dead, add to dict of faces to collapse with this edge
if not face.dead:
self.collapsed_faces[face.getHashableSet()] = face
self.v1.face_collapses += 1
face.dead = True
# Mark collapsed edges as dead. Edges that don't share
# a vertex with this edge's v2 dies.
for edge in face.edges:
if (edge.v1 != self.v2) and (edge.v2 != self.v2):
edge.dead = True
# for face in self.faces:
# face.dead = True
# for edge in face.edges:
# if (edge.v1 != self.v2) and (edge.v2 != self.v2):
# edge.dead = True
# self.v1.face_collapses += 1
# Refactor area of all non-dead faces on vertex 1
for face in self.v1.getfaces():
if not face.dead:
face.RefactorArea()
# Refactor lengths and weights of all non-dead
# edges on vertex 1
for edge in self.v1.getedges():
if not edge.dead:
edge.Refactor()
self.v2.colfrom().col_from = self.v1
self.v1.col_to = self.v2
return True
def LOD(self):
global avg_area, avg_length
progressbar = bcgui.Progress(10)
# Step one. Build temporary data structure suited for weight calculations.
# Vertices are the only ones that can be/needs to be ordered.
# Faces and edges are dicts, with Immutable Sets (containing Vertex indices) as keys.
LODverts = []
LODfaces = {}
LODedges = {}
# Create vertices
progressbar.setup(len(self.vertices), "Creating LODverts")
for vertex in self.vertices:
progressbar.increment()
LODverts.append(self.LODVertex(vertex.id, vertex.loc, vertex.cloned))
# Create faces
num_faces = 0
avg_area = 0
total_area = 0
progressbar.setup(len(self.faces), "Creating LODfaces")
for face in self.faces:
progressbar.increment()
lface = self.LODFace([LODverts[face.vertices[0].id], LODverts[face.vertices[1].id], LODverts[face.vertices[2].id]], num_faces)
LODfaces[lface.getHashableSet()] = lface
total_area += lface.area
num_faces += 1
if num_faces:
avg_area = total_area / float(num_faces)
# Create edges
num_edges = 0
avg_length = 0
total_length = 0
progressbar.setup(len(LODfaces), "Creating LODedges")
for lodface in LODfaces.values():
progressbar.increment()
#Create the three edges from this face
for e in [(0, 1), (0, 2), (1, 2)]:
imset = ImmutableSet((lodface.verts[e[0]].id, lodface.verts[e[1]].id))
if not LODedges.has_key(imset):
#Create edge
lodedge = self.LODEdge(lodface.verts[e[0]],
lodface.verts[e[1]])
LODedges[imset] = lodedge
lodface.edges.append(lodedge)
lodedge.faces.append(lodface)
total_length += lodedge.length
num_edges += 1
else:
lodedge = LODedges[imset]
lodface.edges.append(lodedge)
lodedge.faces.append(lodface)
if num_edges:
avg_length = total_length / float(num_edges)
# print total_length
# print avg_length
# Step two. Calculate initial weights of all edges.
progressbar.setup(len(LODedges), "Calculating weights")
for edge in LODedges.values():
progressbar.increment()
edge.RefactorWeight()
# print edge.weight
# Order edges in list after weights
LODedgelist = LODedges.values()
LODedgelist.sort(self.compareweights)
weight = LODedgelist[0].weight
percentage = len(LODedgelist) * 0.6
count = 0
collapse_list = []
progressbar.setup(percentage, "Calculating LOD")
while count < percentage:
edge = LODedgelist.pop(0)
if not edge.dead:
if edge.collapse():
LODedgelist.sort(self.compareweights)
collapse_list.append((edge.v1, edge.collapsed_faces))
count += 1
progressbar.increment()
self.num_lodsteps = len(collapse_list)
newvertlist = []
newfacelist = []
# The list should be in reverse order, with the most
# important ones first.
collapse_list.reverse()
for vertex, faces in collapse_list:
vertex.col_to = self.vertices[vertex.col_to.id]
for vertex in LODverts:
if not vertex.col_to:
cvert = self.vertices[vertex.id]
cvert.id = len(newvertlist)
newvertlist.append(cvert)
for face in LODfaces.values():
if not face.dead:
newfacelist.append(self.faces[face.id])
for vertex, faces in collapse_list:
for face in faces.values():
newfacelist.append(self.faces[face.id])
cvert = self.vertices[vertex.id]
cvert.id = len(newvertlist)
cvert.collapse_to = vertex.col_to
cvert.num_faces = vertex.face_collapses
newvertlist.append(cvert)
self.vertices = newvertlist
self.faces = newfacelist
def compareweights(self, x, y):
result = x.weight - y.weight
if result < 0:
return -1
elif result > 0:
return 1
else:
return 0
def XML(self):
return """\
#<SUBMESH
##NUMVERTICES="%s"
##NUMFACES="%s"
##MATERIAL="%s"
##NUMLODSTEPS="%s"
##NUMSPRINGS="%s"
##NUMTEXCOORDS="%s"
#>
%s%s%s#</SUBMESH>
""" % (
len(self.vertices),
len(self.faces),
self.material.id,
self.num_lodsteps,
len(self.springs),
len(self.material.mapnames),
CONCAT(self.vertices),
CONCAT(self.springs),
CONCAT(self.faces)
)
#class Progress:
# self.progress = 0.0
# self.
class Map(Cal3DObject):
def __init__(self, uv):
Cal3DObject.__init__(self)
self.uv = Blender.Mathutils.Vector(uv)
def XML(self):
return "###<TEXCOORD>%s %s</TEXCOORD>\n" % (
STRFLT(self.uv.x),
STRFLT(self.uv.y)
)
class Vertex(Cal3DObject):
# An interesting note about this class is that we keep Blender objects
# as self.loc and self.normal. Of note is how we "wrap" the existing
# instances with our own copies, since I was experiencing bugs where
# the existing ones would go out of scope.
def __init__(self, submesh, loc, normal, cloned, uvs):
Cal3DObject.__init__(self)
self.loc = Blender.Mathutils.Vector(loc)
self.normal = Blender.Mathutils.Vector(normal)
self.maps = []
self.influences = []
self.submesh = submesh
self.id = len(submesh.vertices)
self.cloned = cloned
self.collapse_to = None
self.num_faces = 0
# If one UV is None, the rest will also be None.
if len(uvs) and (uvs[0][0] != None):
self.maps.extend([Map(uv) for uv in uvs])
submesh.vertices.append(self)
def XML(self):
loc = blendercal.VECTOR2GL(self.loc)
normal = blendercal.VECTOR2GL(self.normal)
unset = lambda t: "###<!-- %s unset -->\n" % t
collapse = ""
# Note: collapse_to is an index, and _can_ be 0
if self.collapse_to != None:
collapse = """\
###<COLLAPSEID>%s</COLLAPSEID>
###<COLLAPSECOUNT>%s</COLLAPSECOUNT>
""" % (
str(self.collapse_to.id),
str(self.num_faces)
)
loc = loc * bcconf.SCALE
normal = normal * bcconf.SCALE
return """\
##<VERTEX ID="%s" NUMINFLUENCES="%s">
###<POS>%s %s %s</POS>
###<NORM>%s %s %s</NORM>
%s%s%s##</VERTEX>
""" % (
self.id,
len(self.influences),
STRFLT(loc.x),
STRFLT(loc.y),
STRFLT(loc.z),
STRFLT(normal.x),
STRFLT(normal.y),
STRFLT(normal.z),
collapse,
len(self.maps) and CONCAT(self.maps) or unset("UV Coords"),
self.influences and CONCAT(self.influences) or unset("Influences")
)
class Influence(Cal3DObject):
def __init__(self, bone, weight):
Cal3DObject.__init__(self)
self.bone = bone
self.weight = weight
def XML(self):
return """###<INFLUENCE ID="%s">%s</INFLUENCE>\n""" % (
self.bone.id,
STRFLT(self.weight)
)
class Face(Cal3DObject):
def __init__(self, submesh, v1, v2, v3):
Cal3DObject.__init__(self)
self.vertices = (v1, v2, v3)
self.submesh = submesh
submesh.faces.append(self)
def XML(self):
return """##<FACE VERTEXID="%s %s %s"/>\n""" % (self.vertices[0].id, self.vertices[1].id, self.vertices[2].id)
class Skeleton(Cal3DObject):
ARMATURE = None
def __init__(self):
Cal3DObject.__init__(self, "XSF")
self.bones = []
def XML(self):
return """\
<SKELETON NUMBONES="%s">
%s</SKELETON>
""" % (
len(self.bones),
CONCAT(self.bones)
)
class Bone(Cal3DObject):
BONES = {}
def __init__(self, skeleton, parent, bone, armamat):
Cal3DObject.__init__(self)
absmat = bone.matrix["ARMATURESPACE"] * armamat
self.parent = parent
self.name = bone.name.replace(".", "_")
self.invert = Blender.Mathutils.Matrix(absmat).invert()
self.local = (parent and (absmat * self.parent.invert)) or absmat
self.children = []
self.skeleton = skeleton
self.id = len(skeleton.bones)
if self.parent:
self.parent.children.append(self)
skeleton.bones.append(self)
Bone.BONES[self.name] = self
def XML(self):
# TRANSLATION and ROTATION are relative to the parent bone.
# They are virtually useless since the animations (.XAF .CAF)
# will always override them.
#
# LOCALTRANSLATION and LOCALROTATION are the invert of the cumulated
# TRANSLATION and ROTATION (see above). It is used to calculate the
# delta between an animated bone and the original non animated bone.
# This delta will be applied to the influenced vertexes.
#
# Negate the rotation because blender rotations are clockwise
# and cal3d rotations are counterclockwise
local = blendercal.MATRIX2GL(self.local)
local = local * bcconf.SCALE
localloc = local.translationPart()
localrot = local.toQuat()
invert = blendercal.MATRIX2GL(self.invert)
invertloc = invert.translationPart()
invertloc = invertloc * bcconf.SCALE
invertrot = invert.toQuat()
return """\
#<BONE ID="%s" NAME="%s" NUMCHILD="%s">
##<TRANSLATION>%s %s %s</TRANSLATION>
##<ROTATION>%s %s %s -%s</ROTATION>
##<LOCALTRANSLATION>%s %s %s</LOCALTRANSLATION>
##<LOCALROTATION>%s %s %s -%s</LOCALROTATION>
##<PARENTID>%s</PARENTID>
%s#</BONE>
""" % (
self.id,
self.name,
len(self.children),
STRFLT(localloc.x),
STRFLT(localloc.y),
STRFLT(localloc.z),
STRFLT(localrot.x),
STRFLT(localrot.y),
STRFLT(localrot.z),
STRFLT(localrot.w),
STRFLT(invertloc.x),
STRFLT(invertloc.y),
STRFLT(invertloc.z),
STRFLT(invertrot.x),
STRFLT(invertrot.y),
STRFLT(invertrot.z),
STRFLT(invertrot.w),
self.parent and "%d" % self.parent.id or "-1",
"".join(["##<CHILDID>%s</CHILDID>\n" % c.id for c in self.children])
)
class Animation(Cal3DObject):
def __init__(self, name, duration=0.0):
Cal3DObject.__init__(self, "XAF")
self.name = name.replace(".", "_")
self.duration = duration
self.tracks = {}
def XML(self):
return """\
<ANIMATION DURATION="%s" NUMTRACKS="%s">
%s</ANIMATION>
""" % (
self.duration,
len(self.tracks),
CONCAT(self.tracks.values())
)
class Track(Cal3DObject):
def __init__(self, animation, bone):
Cal3DObject.__init__(self)
self.bone = bone
self.keyframes = []
self.animation = animation
animation.tracks[bone.name] = self
def XML(self):
return """\
#<TRACK BONEID="%s" NUMKEYFRAMES="%s">
%s#</TRACK>
""" % (
self.bone.id,
len(self.keyframes),
CONCAT(self.keyframes)
)
class KeyFrame(Cal3DObject):
def __init__(self, track, time, loc, rot):
Cal3DObject.__init__(self)
self.time = time
self.loc = Blender.Mathutils.Vector(loc)
self.rot = Blender.Mathutils.Quaternion(rot)
self.track = track
track.keyframes.append(self)
def XML(self):
self.loc = self.loc * bcconf.SCALE
return """\
##<KEYFRAME TIME="%s">
###<TRANSLATION>%s %s %s</TRANSLATION>
###<ROTATION>%s %s %s -%s</ROTATION>
##</KEYFRAME>
""" % (
STRFLT(self.time),
STRFLT(self.loc.x),
STRFLT(self.loc.y),
STRFLT(self.loc.z),
STRFLT(self.rot.x),
STRFLT(self.rot.y),
STRFLT(self.rot.z),
STRFLT(self.rot.w)
)
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