Cura/util/objectScene.py

   1 import random
   2 import numpy
   3
   4 class _objectOrder(object):
   5         def __init__(self, order, todo):
   6                 self.order = order
   7                 self.todo = todo
   8
   9 class _objectOrderFinder(object):
  10         def __init__(self, scene, offset, leftToRight, frontToBack, gantryHeight):
  11                 self._scene = scene
  12                 self._offset = offset - numpy.array([0.1,0.1])
  13                 self._objs = scene.objects()
  14                 self._leftToRight = leftToRight
  15                 self._frontToBack = frontToBack
  16                 initialList = []
  17                 for n in xrange(0, len(self._objs)):
  18                         if scene.checkPlatform(self._objs[n]):
  19                                 initialList.append(n)
  20                 if len(initialList) == 0:
  21                         self.order = []
  22                         return
  23
  24                 self._hitMap = [None] * (max(initialList)+1)
  25                 for a in initialList:
  26                         self._hitMap[a] = [False] * (max(initialList)+1)
  27                         for b in initialList:
  28                                 self._hitMap[a][b] = self._checkHit(a, b)
  29
  30                 initialList.sort(self._objIdxCmp)
  31
  32                 self._todo = [_objectOrder([], initialList)]
  33                 while len(self._todo) > 0:
  34                         current = self._todo.pop()
  35                         #print len(self._todo), len(current.order), len(initialList)
  36                         for addIdx in current.todo:
  37                                 if not self._checkHitFor(addIdx, current.order):
  38                                         todoList = current.todo[:]
  39                                         todoList.remove(addIdx)
  40                                         order = current.order[:] + [addIdx]
  41                                         if len(todoList) == 0:
  42                                                 self._todo = None
  43                                                 self.order = order
  44                                                 return
  45                                         self._todo.append(_objectOrder(order, todoList))
  46                 self.order = None
  47
  48         def _objIdxCmp(self, a, b):
  49                 scoreA = sum(self._hitMap[a])
  50                 scoreB = sum(self._hitMap[b])
  51                 return scoreA - scoreB
  52
  53         def _checkHitFor(self, addIdx, others):
  54                 for idx in others:
  55                         if self._hitMap[addIdx][idx]:
  56                                 return True
  57                 return False
  58
  59         def _checkHit(self, addIdx, idx):
  60                 addPos = self._scene._objectList[addIdx].getPosition()
  61                 addSize = self._scene._objectList[addIdx].getSize()
  62                 pos = self._scene._objectList[idx].getPosition()
  63                 size = self._scene._objectList[idx].getSize()
  64
  65                 if self._leftToRight:
  66                         if addPos[0] - addSize[0] / 2 - self._offset[0] <= pos[0] + size[0] / 2:
  67                                 return False
  68                 else:
  69                         if addPos[0] + addSize[0] / 2 + self._offset[0] <= pos[0] - size[0] / 2:
  70                                 return False
  71
  72                 if self._frontToBack:
  73                         if addPos[1] - addSize[1] / 2 - self._offset[1] >= pos[1] + size[1] / 2:
  74                                 return False
  75                 else:
  76                         if addPos[1] + addSize[1] / 2 + self._offset[1] >= pos[1] - size[1] / 2:
  77                                 return False
  78
  79                 return True
  80
  81 class Scene(object):
  82         def __init__(self):
  83                 self._objectList = []
  84                 self._sizeOffsets = numpy.array([0.0,0.0], numpy.float32)
  85                 self._machineSize = numpy.array([100,100,100], numpy.float32)
  86                 self._headOffsets = numpy.array([18.0,18.0], numpy.float32)
  87                 self._leftToRight = False
  88                 self._frontToBack = True
  89                 self._gantryHeight = 60
  90
  91         def setMachineSize(self, machineSize):
  92                 self._machineSize = machineSize
  93
  94         def setSizeOffsets(self, sizeOffsets):
  95                 self._sizeOffsets = sizeOffsets
  96
  97         def setHeadSize(self, xMin, xMax, yMin, yMax, gantryHeight):
  98                 self._leftToRight = xMin < xMax
  99                 self._frontToBack = yMin < yMax
 100                 self._headOffsets[0] = min(xMin, xMax)
 101                 self._headOffsets[1] = min(yMin, yMax)
 102                 self._gantryHeight = gantryHeight
 103
 104         def getObjectExtend(self):
 105                 return self._sizeOffsets + self._headOffsets
 106
 107         def objects(self):
 108                 return self._objectList
 109
 110         def add(self, obj):
 111                 self._findFreePositionFor(obj)
 112                 self._objectList.append(obj)
 113                 self.pushFree()
 114
 115         def remove(self, obj):
 116                 self._objectList.remove(obj)
 117
 118         def merge(self, obj1, obj2):
 119                 self.remove(obj2)
 120                 obj1._meshList += obj2._meshList
 121                 obj1.processMatrix()
 122                 obj1.setPosition((obj1.getPosition() + obj2.getPosition()) / 2)
 123                 self.pushFree()
 124
 125         def pushFree(self):
 126                 n = 1000
 127                 while self._pushFree():
 128                         n -= 1
 129                         if n < 0:
 130                                 return
 131
 132         def arrangeAll(self):
 133                 oldList = self._objectList
 134                 self._objectList = []
 135                 for obj in oldList:
 136                         obj.setPosition(numpy.array([0,0], numpy.float32))
 137                         self.add(obj)
 138
 139         def centerAll(self):
 140                 minPos = numpy.array([9999999,9999999], numpy.float32)
 141                 maxPos = numpy.array([-9999999,-9999999], numpy.float32)
 142                 for obj in self._objectList:
 143                         pos = obj.getPosition()
 144                         size = obj.getSize()
 145                         minPos[0] = min(minPos[0], pos[0] - size[0] / 2)
 146                         minPos[1] = min(minPos[1], pos[1] - size[1] / 2)
 147                         maxPos[0] = max(maxPos[0], pos[0] + size[0] / 2)
 148                         maxPos[1] = max(maxPos[1], pos[1] + size[1] / 2)
 149                 offset = -(maxPos + minPos) / 2
 150                 for obj in self._objectList:
 151                         obj.setPosition(obj.getPosition() + offset)
 152
 153         def printOrder(self):
 154                 order = _objectOrderFinder(self, self._headOffsets + self._sizeOffsets, self._leftToRight, self._frontToBack, self._gantryHeight).order
 155                 if order is None:
 156                         print "ODD! Cannot find out proper printing order!!!"
 157                         for obj in self._objectList:
 158                                 print obj.getPosition(), obj.getSize()
 159                 return order
 160
 161         def _pushFree(self):
 162                 for a in self._objectList:
 163                         for b in self._objectList:
 164                                 if not self._checkHit(a, b):
 165                                         continue
 166                                 posDiff = a.getPosition() - b.getPosition()
 167                                 if posDiff[0] == 0.0 and posDiff[1] == 0.0:
 168                                         posDiff[1] = 1.0
 169                                 if abs(posDiff[0]) > abs(posDiff[1]):
 170                                         axis = 0
 171                                 else:
 172                                         axis = 1
 173                                 aPos = a.getPosition()
 174                                 bPos = b.getPosition()
 175                                 center = (aPos[axis] + bPos[axis]) / 2
 176                                 distance = (a.getSize()[axis] + b.getSize()[axis]) / 2 + 0.1 + self._sizeOffsets[axis] + self._headOffsets[axis]
 177                                 if posDiff[axis] < 0:
 178                                         distance = -distance
 179                                 aPos[axis] = center + distance / 2
 180                                 bPos[axis] = center - distance / 2
 181                                 a.setPosition(aPos)
 182                                 b.setPosition(bPos)
 183                                 return True
 184                 return False
 185
 186         def _checkHit(self, a, b):
 187                 if a == b:
 188                         return False
 189                 posDiff = a.getPosition() - b.getPosition()
 190                 if abs(posDiff[0]) < (a.getSize()[0] + b.getSize()[0]) / 2 + self._sizeOffsets[0] + self._headOffsets[0]:
 191                         if abs(posDiff[1]) < (a.getSize()[1] + b.getSize()[1]) / 2 + self._sizeOffsets[1] + self._headOffsets[1]:
 192                                 return True
 193                 return False
 194
 195         def checkPlatform(self, obj):
 196                 p = obj.getPosition()
 197                 s = obj.getSize()[0:2] / 2 + self._sizeOffsets
 198                 if p[0] - s[0] < -self._machineSize[0] / 2:
 199                         return False
 200                 if p[0] + s[0] > self._machineSize[0] / 2:
 201                         return False
 202                 if p[1] - s[1] < -self._machineSize[1] / 2:
 203                         return False
 204                 if p[1] + s[1] > self._machineSize[1] / 2:
 205                         return False
 206                 return True
 207
 208         def _findFreePositionFor(self, obj):
 209                 posList = []
 210                 for a in self._objectList:
 211                         p = a.getPosition()
 212                         s = (a.getSize()[0:2] + obj.getSize()[0:2]) / 2 + self._sizeOffsets + self._headOffsets
 213                         posList.append(p + s * ( 1.0, 1.0))
 214                         posList.append(p + s * ( 0.0, 1.0))
 215                         posList.append(p + s * (-1.0, 1.0))
 216                         posList.append(p + s * ( 1.0, 0.0))
 217                         posList.append(p + s * (-1.0, 0.0))
 218                         posList.append(p + s * ( 1.0,-1.0))
 219                         posList.append(p + s * ( 0.0,-1.0))
 220                         posList.append(p + s * (-1.0,-1.0))
 221
 222                 best = None
 223                 bestDist = None
 224                 for p in posList:
 225                         obj.setPosition(p)
 226                         ok = True
 227                         for a in self._objectList:
 228                                 if self._checkHit(a, obj):
 229                                         ok = False
 230                                         break
 231                         if not ok:
 232                                 continue
 233                         dist = numpy.linalg.norm(p)
 234                         if not self.checkPlatform(obj):
 235                                 dist *= 3
 236                         if best is None or dist < bestDist:
 237                                 best = p
 238                                 bestDist = dist
 239                 if best is not None:
 240                         obj.setPosition(best)