def removeIntersection( loop ): "Get loop without the first intersection." withoutIntersection = [] for pointIndex in xrange( len( loop ) ): behindComplex = loop[ ( pointIndex + len( loop ) - 1 ) % len( loop ) ] behindEndComplex = loop[ ( pointIndex + len( loop ) - 2 ) % len( loop ) ] behindMidpointComplex = 0.5 * ( behindComplex + behindEndComplex ) aheadComplex = loop[ pointIndex ] aheadEndComplex = loop[ ( pointIndex + 1 ) % len( loop ) ] aheadMidpointComplex = 0.5 * ( aheadComplex + aheadEndComplex ) normalizedSegment = behindComplex - behindMidpointComplex normalizedSegmentLength = abs( normalizedSegment ) if normalizedSegmentLength > 0.0: normalizedSegment /= normalizedSegmentLength segmentYMirror = complex( normalizedSegment.real, - normalizedSegment.imag ) behindRotated = segmentYMirror * behindComplex behindMidpointRotated = segmentYMirror * behindMidpointComplex aheadRotated = segmentYMirror * aheadComplex aheadMidpointRotated = segmentYMirror * aheadMidpointComplex y = behindRotated.imag isYAboveFirst = y > aheadRotated.imag isYAboveSecond = y > aheadMidpointRotated.imag if isYAboveFirst != isYAboveSecond: xIntersection = euclidean.getXIntersection( aheadRotated, aheadMidpointRotated, y ) if xIntersection > min( behindMidpointRotated.real, behindRotated.real ) and xIntersection < max( behindMidpointRotated.real, behindRotated.real ): intersectionPoint = normalizedSegment * complex( xIntersection, y ) loop[ ( pointIndex + len( loop ) - 1 ) % len( loop ) ] = intersectionPoint del loop[ pointIndex ] return
def removeIntersection( loop ): "Get loop without the first intersection." withoutIntersection = [] for pointIndex in xrange( len( loop ) ): behindComplex = loop[ ( pointIndex + len( loop ) - 1 ) % len( loop ) ] behindEndComplex = loop[ ( pointIndex + len( loop ) - 2 ) % len( loop ) ] behindMidpointComplex = 0.5 * ( behindComplex + behindEndComplex ) aheadComplex = loop[ pointIndex ] aheadEndComplex = loop[ ( pointIndex + 1 ) % len( loop ) ] aheadMidpointComplex = 0.5 * ( aheadComplex + aheadEndComplex ) normalizedSegment = behindComplex - behindMidpointComplex normalizedSegmentLength = abs( normalizedSegment ) if normalizedSegmentLength > 0.0: normalizedSegment /= normalizedSegmentLength segmentYMirror = complex( normalizedSegment.real, - normalizedSegment.imag ) behindRotated = segmentYMirror * behindComplex behindMidpointRotated = segmentYMirror * behindMidpointComplex aheadRotated = segmentYMirror * aheadComplex aheadMidpointRotated = segmentYMirror * aheadMidpointComplex y = behindRotated.imag isYAboveFirst = y > aheadRotated.imag isYAboveSecond = y > aheadMidpointRotated.imag if isYAboveFirst != isYAboveSecond: xIntersection = euclidean.getXIntersection( aheadRotated, aheadMidpointRotated, y ) if xIntersection > min( behindMidpointRotated.real, behindRotated.real ) and xIntersection < max( behindMidpointRotated.real, behindRotated.real ): intersectionPoint = normalizedSegment * complex( xIntersection, y ) loop[ ( pointIndex + len( loop ) - 1 ) % len( loop ) ] = intersectionPoint del loop[ pointIndex ] return
def addLineXSegmentIntersection( lineLoopsIntersections, segmentFirstX, segmentSecondX, vector3First, vector3Second, y ): "Add intersections of the line with the x segment." isYAboveFirst = y > vector3First.imag isYAboveSecond = y > vector3Second.imag if isYAboveFirst == isYAboveSecond: return xIntersection = euclidean.getXIntersection( vector3First, vector3Second, y ) if xIntersection <= min( segmentFirstX, segmentSecondX ): return if xIntersection >= max( segmentFirstX, segmentSecondX ): return lineLoopsIntersections.append( xIntersection )
