def getBridgeLoops( layerThickness, loop ): "Get the inset bridge loops from the loop." halfWidth = 1.5 * layerThickness slightlyGreaterThanHalfWidth = 1.1 * halfWidth extrudateLoops = [] centers = intercircle.getCentersFromLoop( loop, slightlyGreaterThanHalfWidth ) for center in centers: extrudateLoop = intercircle.getSimplifiedInsetFromClockwiseLoop( center, halfWidth ) if intercircle.isLargeSameDirection( extrudateLoop, center, halfWidth ): if euclidean.isPathInsideLoop( loop, extrudateLoop ) == euclidean.isWiddershins( loop ): extrudateLoop.reverse() extrudateLoops.append( extrudateLoop ) return extrudateLoops
def addAlreadyFilledArounds( alreadyFilledArounds, loop, radius ): "Add already filled loops around loop to alreadyFilledArounds." radius = abs( radius ) alreadyFilledLoop = [] slightlyGreaterThanRadius = 1.01 * radius muchGreaterThanRadius = 2.5 * radius centers = intercircle.getCentersFromLoop( loop, slightlyGreaterThanRadius ) for center in centers: alreadyFilledInset = intercircle.getSimplifiedInsetFromClockwiseLoop( center, radius ) if intercircle.isLargeSameDirection( alreadyFilledInset, center, radius ): alreadyFilledLoop.append( alreadyFilledInset ) if len( alreadyFilledLoop ) > 0: alreadyFilledArounds.append( alreadyFilledLoop )
def getBridgeDirection( belowLoops, layerLoops, layerThickness ): "Get span direction for the majority of the overhanging extrusion perimeter, if any." if len( belowLoops ) < 1: return None belowOutsetLoops = [] overhangInset = 1.875 * layerThickness slightlyGreaterThanOverhang = 1.1 * overhangInset for loop in belowLoops: centers = intercircle.getCentersFromLoopDirection( True, loop, slightlyGreaterThanOverhang ) for center in centers: outset = intercircle.getSimplifiedInsetFromClockwiseLoop( center, overhangInset ) if intercircle.isLargeSameDirection( outset, center, overhangInset ): belowOutsetLoops.append( outset ) bridgeRotation = complex() for loop in layerLoops: for pointIndex in xrange( len( loop ) ): previousIndex = ( pointIndex + len( loop ) - 1 ) % len( loop ) bridgeRotation += getOverhangDirection( belowOutsetLoops, loop[ previousIndex ], loop[ pointIndex ] ) if abs( bridgeRotation ) < 0.75 * layerThickness: return None else: bridgeRotation /= abs( bridgeRotation ) return cmath.sqrt( bridgeRotation )
