def onStrokeAdded( self, stroke ):
"Watches for Strokes with Circularity > threshold to Annotate"
# need at least 6 points to be a circle
if stroke.length()<6:
return
s_norm = GeomUtils.strokeNormalizeSpacing( stroke, 20 )
s_chop = GeomUtils.strokeChopEnds( s_norm, 0.20 )
circ_norm = GeomUtils.strokeCircularity( s_norm )
circ_chop = GeomUtils.strokeCircularity( s_chop )
logger.debug( "stroke: %s", [str(p) for p in s_norm.Points] )
logger.debug( "potential circles (%f,%f) <> %f", circ_norm, circ_chop, self.threshold )
if( circ_norm>self.threshold or circ_chop>self.threshold):
cen = stroke.Center
avgDist = GeomUtils.averageDistance( cen, stroke.Points )
anno = CircleAnnotation( circ_norm, cen, avgDist )
BoardSingleton().AnnotateStrokes( [stroke], anno)
