162 lines
4.5 KiB
Python
162 lines
4.5 KiB
Python
import sys, math, re, os, struct, time
|
|
|
|
import util3d
|
|
|
|
import numpy
|
|
|
|
class mesh(object):
|
|
def __init__(self):
|
|
self.vertexes = None
|
|
self.origonalVertexes = None
|
|
self.vertexCount = 0
|
|
|
|
def addVertex(self, x, y, z):
|
|
n = self.vertexCount
|
|
self.origonalVertexes[n][0] = x
|
|
self.origonalVertexes[n][1] = y
|
|
self.origonalVertexes[n][2] = z
|
|
self.vertexCount += 1
|
|
|
|
def _prepareVertexCount(self, vertexNumber):
|
|
#Set the amount of faces before loading data in them. This way we can create the numpy arrays before we fill them.
|
|
self.origonalVertexes = numpy.zeros((vertexNumber, 3), float)
|
|
self.normal = numpy.zeros((vertexNumber / 3, 3))
|
|
self.vertexCount = 0
|
|
|
|
def _postProcessAfterLoad(self):
|
|
self.vertexes = self.origonalVertexes.copy()
|
|
self.getMinimumZ()
|
|
|
|
def getMinimumZ(self):
|
|
self.min = self.vertexes.min(0)
|
|
self.max = self.vertexes.max(0)
|
|
self.size = self.max - self.min
|
|
return self.min[2]
|
|
|
|
def getMaximum(self):
|
|
return self.max
|
|
def getMinimum(self):
|
|
return self.min
|
|
def getSize(self):
|
|
return self.size
|
|
|
|
def setRotateMirror(self, rotate, mirrorX, mirrorY, mirrorZ, swapXZ, swapYZ):
|
|
rotate = rotate / 180.0 * math.pi
|
|
scaleX = 1.0
|
|
scaleY = 1.0
|
|
scaleZ = 1.0
|
|
if mirrorX:
|
|
scaleX = -scaleX
|
|
if mirrorY:
|
|
scaleY = -scaleY
|
|
if mirrorZ:
|
|
scaleZ = -scaleZ
|
|
mat00 = math.cos(rotate) * scaleX
|
|
mat01 =-math.sin(rotate) * scaleY
|
|
mat10 = math.sin(rotate) * scaleX
|
|
mat11 = math.cos(rotate) * scaleY
|
|
|
|
for i in xrange(0, len(self.origonalVertexes)):
|
|
x = self.origonalVertexes[i][0]
|
|
y = self.origonalVertexes[i][1]
|
|
z = self.origonalVertexes[i][2]
|
|
if swapXZ:
|
|
x, z = z, x
|
|
if swapYZ:
|
|
y, z = z, y
|
|
self.vertexes[i][0] = x * mat00 + y * mat01
|
|
self.vertexes[i][1] = x * mat10 + y * mat11
|
|
self.vertexes[i][2] = z * scaleZ
|
|
|
|
for i in xrange(0, len(self.origonalVertexes), 3):
|
|
v1 = self.vertexes[i]
|
|
v2 = self.vertexes[i+1]
|
|
v3 = self.vertexes[i+2]
|
|
self.normal[i/3] = numpy.cross((v2 - v1), (v3 - v1))
|
|
self.normal[i/3] /= (self.normal[i/3] * self.normal[i/3]).sum()
|
|
|
|
self.getMinimumZ()
|
|
|
|
def splitToParts(self):
|
|
t0 = time.time()
|
|
|
|
print "%f: " % (time.time() - t0), "Splitting a model with %d vertexes." % (len(self.vertexes))
|
|
removeDict = {}
|
|
tree = util3d.AABBTree()
|
|
off = numpy.array([0.0001,0.0001,0.0001])
|
|
for idx in xrange(0, self.vertexCount):
|
|
v = self.vertexes[idx]
|
|
e = util3d.AABB(v-off, v+off)
|
|
q = tree.query(e)
|
|
if len(q) < 1:
|
|
e.idx = idx
|
|
tree.insert(e)
|
|
else:
|
|
removeDict[idx] = q[0].idx
|
|
print "%f: " % (time.time() - t0), "Marked %d duplicate vertexes for removal." % (len(removeDict))
|
|
|
|
faceList = []
|
|
for idx in xrange(0, self.vertexCount, 3):
|
|
f = [idx, idx + 1, idx + 2]
|
|
if removeDict.has_key(f[0]):
|
|
f[0] = removeDict[f[0]]
|
|
if removeDict.has_key(f[1]):
|
|
f[1] = removeDict[f[1]]
|
|
if removeDict.has_key(f[2]):
|
|
f[2] = removeDict[f[2]]
|
|
faceList.append(f)
|
|
|
|
print "%f: " % (time.time() - t0), "Building face lists after vertex removal."
|
|
vertexFaceList = []
|
|
for idx in xrange(0, self.vertexCount):
|
|
vertexFaceList.append([])
|
|
for idx in xrange(0, len(faceList)):
|
|
f = faceList[idx]
|
|
vertexFaceList[f[0]].append(idx)
|
|
vertexFaceList[f[1]].append(idx)
|
|
vertexFaceList[f[2]].append(idx)
|
|
|
|
print "%f: " % (time.time() - t0), "Building parts."
|
|
self._vertexFaceList = vertexFaceList
|
|
self._faceList = faceList
|
|
partList = []
|
|
doneSet = set()
|
|
for idx in xrange(0, len(faceList)):
|
|
if not idx in doneSet:
|
|
partList.append(self._createPartFromFacewalk(idx, doneSet))
|
|
print "%f: " % (time.time() - t0), "Split into %d parts" % (len(partList))
|
|
self._vertexFaceList = None
|
|
self._faceList = None
|
|
return partList
|
|
|
|
def _createPartFromFacewalk(self, startFaceIdx, doneSet):
|
|
m = mesh()
|
|
m._prepareVertexCount(self.vertexCount)
|
|
todoList = [startFaceIdx]
|
|
doneSet.add(startFaceIdx)
|
|
while len(todoList) > 0:
|
|
faceIdx = todoList.pop()
|
|
self._partAddFacewalk(m, faceIdx, doneSet, todoList)
|
|
return m
|
|
|
|
def _partAddFacewalk(self, part, faceIdx, doneSet, todoList):
|
|
f = self._faceList[faceIdx]
|
|
v0 = self.vertexes[f[0]]
|
|
v1 = self.vertexes[f[0]]
|
|
v2 = self.vertexes[f[0]]
|
|
part.addVertex(v0[0], v0[1], v0[2])
|
|
part.addVertex(v1[0], v1[1], v1[2])
|
|
part.addVertex(v2[0], v2[1], v2[2])
|
|
for f1 in self._vertexFaceList[f[0]]:
|
|
if f1 not in doneSet:
|
|
todoList.append(f1)
|
|
doneSet.add(f1)
|
|
for f1 in self._vertexFaceList[f[1]]:
|
|
if f1 not in doneSet:
|
|
todoList.append(f1)
|
|
doneSet.add(f1)
|
|
for f1 in self._vertexFaceList[f[2]]:
|
|
if f1 not in doneSet:
|
|
todoList.append(f1)
|
|
doneSet.add(f1)
|
|
|