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):
  11                 self._scene = scene
  12                 self._offset = offset - numpy.array([0.1,0.1])
  13                 self._objs = scene.objects()
  14                 self._leftToRight = True
  15                 self._frontToBack = True
  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                 self._todo = [_objectOrder([], initialList)]
  24                 while len(self._todo) > 0:
  25                         current = self._todo.pop()
  26                         for addIdx in current.todo:
  27                                 if not self._checkHitFor(addIdx, current.order):
  28                                         todoList = current.todo[:]
  29                                         todoList.remove(addIdx)
  30                                         order = current.order[:] + [addIdx]
  31                                         if len(todoList) == 0:
  32                                                 self._todo = None
  33                                                 self.order = order
  34                                                 return
  35                                         self._todo.append(_objectOrder(order, todoList))
  36                 self.order = None
  37
  38         def _checkHitFor(self, addIdx, others):
  39                 for idx in others:
  40                         if self._checkHit(addIdx, idx):
  41                                 return True
  42                 return False
  43
  44         def _checkHit(self, addIdx, idx):
  45                 addPos = self._scene._objectList[addIdx].getPosition()
  46                 addSize = self._scene._objectList[addIdx].getSize()
  47                 pos = self._scene._objectList[idx].getPosition()
  48                 size = self._scene._objectList[idx].getSize()
  49
  50                 if self._leftToRight:
  51                         if addPos[0] + addSize[0] / 2 + self._offset[0] <= pos[0] - size[0] / 2:
  52                                 return False
  53                 else:
  54                         if addPos[0] - addSize[0] / 2 - self._offset[0] <= pos[0] + size[0] / 2:
  55                                 return False
  56
  57                 if self._frontToBack:
  58                         if addPos[1] - addSize[1] / 2 - self._offset[1] >= pos[1] + size[1] / 2:
  59                                 return False
  60                 else:
  61                         if addPos[1] + addSize[1] / 2 + self._offset[1] >= pos[1] - size[1] / 2:
  62                                 return False
  63
  64                 return True
  65
  66 class Scene(object):
  67         def __init__(self):
  68                 self._objectList = []
  69                 self._sizeOffsets = numpy.array([3.0,3.0], numpy.float32)
  70                 self._machineSize = numpy.array([100,100,100], numpy.float32)
  71                 self._headOffsets = numpy.array([18.0,18.0], numpy.float32)
  72
  73         def setMachineSize(self, machineSize):
  74                 self._machineSize = machineSize
  75
  76         def setSizeOffsets(self, sizeOffsets):
  77                 self._sizeOffsets = sizeOffsets
  78
  79         def getObjectExtend(self):
  80                 return self._sizeOffsets + self._headOffsets
  81
  82         def objects(self):
  83                 return self._objectList
  84
  85         def add(self, obj):
  86                 self._findFreePositionFor(obj)
  87                 self._objectList.append(obj)
  88                 self.pushFree()
  89
  90         def remove(self, obj):
  91                 self._objectList.remove(obj)
  92
  93         def pushFree(self):
  94                 n = 1000
  95                 while self._pushFree():
  96                         n -= 1
  97                         if n < 0:
  98                                 return
  99
 100         def arrangeAll(self):
 101                 oldList = self._objectList
 102                 self._objectList = []
 103                 for obj in oldList:
 104                         obj.setPosition(numpy.array([0,0], numpy.float32))
 105                         self.add(obj)
 106
 107         def centerAll(self):
 108                 minPos = numpy.array([9999999,9999999], numpy.float32)
 109                 maxPos = numpy.array([-9999999,-9999999], numpy.float32)
 110                 for obj in self._objectList:
 111                         pos = obj.getPosition()
 112                         size = obj.getSize()
 113                         minPos[0] = min(minPos[0], pos[0] - size[0] / 2)
 114                         minPos[1] = min(minPos[1], pos[1] - size[1] / 2)
 115                         maxPos[0] = max(maxPos[0], pos[0] + size[0] / 2)
 116                         maxPos[1] = max(maxPos[1], pos[1] + size[1] / 2)
 117                 offset = -(maxPos + minPos) / 2
 118                 for obj in self._objectList:
 119                         obj.setPosition(obj.getPosition() + offset)
 120
 121         def printOrder(self):
 122                 order = _objectOrderFinder(self, self._headOffsets + self._sizeOffsets).order
 123                 if order is None:
 124                         print "ODD! Cannot find out proper printing order!!!"
 125                 return order
 126
 127         def _pushFree(self):
 128                 for a in self._objectList:
 129                         for b in self._objectList:
 130                                 if not self._checkHit(a, b):
 131                                         continue
 132                                 posDiff = a.getPosition() - b.getPosition()
 133                                 if posDiff[0] == 0.0 and posDiff[1] == 0.0:
 134                                         posDiff[1] = 1.0
 135                                 if abs(posDiff[0]) > abs(posDiff[1]):
 136                                         axis = 0
 137                                 else:
 138                                         axis = 1
 139                                 aPos = a.getPosition()
 140                                 bPos = b.getPosition()
 141                                 center = (aPos[axis] + bPos[axis]) / 2
 142                                 distance = (a.getSize()[axis] + b.getSize()[axis]) / 2 + 0.1 + self._sizeOffsets[axis] + self._headOffsets[axis]
 143                                 if posDiff[axis] < 0:
 144                                         distance = -distance
 145                                 aPos[axis] = center + distance / 2
 146                                 bPos[axis] = center - distance / 2
 147                                 a.setPosition(aPos)
 148                                 b.setPosition(bPos)
 149                                 return True
 150                 return False
 151
 152         def _checkHit(self, a, b):
 153                 if a == b:
 154                         return False
 155                 posDiff = a.getPosition() - b.getPosition()
 156                 if abs(posDiff[0]) < (a.getSize()[0] + b.getSize()[0]) / 2 + self._sizeOffsets[0] + self._headOffsets[0]:
 157                         if abs(posDiff[1]) < (a.getSize()[1] + b.getSize()[1]) / 2 + self._sizeOffsets[1] + self._headOffsets[1]:
 158                                 return True
 159                 return False
 160
 161         def checkPlatform(self, obj):
 162                 p = obj.getPosition()
 163                 s = obj.getSize()[0:2] / 2 + self._sizeOffsets
 164                 if p[0] - s[0] < -self._machineSize[0] / 2:
 165                         return False
 166                 if p[0] + s[0] > self._machineSize[0] / 2:
 167                         return False
 168                 if p[1] - s[1] < -self._machineSize[1] / 2:
 169                         return False
 170                 if p[1] + s[1] > self._machineSize[1] / 2:
 171                         return False
 172                 return True
 173
 174         def _findFreePositionFor(self, obj):
 175                 posList = []
 176                 for a in self._objectList:
 177                         p = a.getPosition()
 178                         s = (a.getSize()[0:2] + obj.getSize()[0:2]) / 2 + self._sizeOffsets + self._headOffsets
 179                         posList.append(p + s * ( 1, 1))
 180                         posList.append(p + s * ( 0, 1))
 181                         posList.append(p + s * (-1, 1))
 182                         posList.append(p + s * ( 1, 0))
 183                         posList.append(p + s * (-1, 0))
 184                         posList.append(p + s * ( 1,-1))
 185                         posList.append(p + s * ( 0,-1))
 186                         posList.append(p + s * (-1,-1))
 187
 188                 best = None
 189                 bestDist = None
 190                 for p in posList:
 191                         obj.setPosition(p)
 192                         ok = True
 193                         for a in self._objectList:
 194                                 if self._checkHit(a, obj):
 195                                         ok = False
 196                                         break
 197                         if not ok:
 198                                 continue
 199                         dist = numpy.linalg.norm(p)
 200                         if not self.checkPlatform(obj):
 201                                 dist *= 3
 202                         if best is None or dist < bestDist:
 203                                 best = p
 204                                 bestDist = dist
 205                 if best is not None:
 206                         obj.setPosition(best)