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Returns the orientation of the triangle a, b, c.

Return True if a,b,c are oriented clock-wise.

src/p/y/Py2D-HEAD/py2d/Navigation.py   Py2D(Download)
		edge = self._polygons[i].neighbors[self._polygons[i+1]][1]
 
		left, right = (edge[0], edge[1]) if py2d.Math.point_orientation(position, edge[0], edge[1]) else (edge[1], edge[0])
 
		for j in range(i+1, len(self._polygons)-1):
			edge = self._polygons[j].neighbors[self._polygons[j+1]][1]
			new_left, new_right = (edge[0], edge[1]) if py2d.Math.point_orientation(position, edge[0], edge[1]) else (edge[1], edge[0])
 
			# make the funnel smaller
			if py2d.Math.point_orientation(position, left, new_left): left = new_left
			# make the funnel smaller
			if py2d.Math.point_orientation(position, left, new_left): left = new_left
			if not py2d.Math.point_orientation(position, left, right):
				return right
 
 
			if not py2d.Math.point_orientation(position, right, new_right): right = new_right