Function width_brush_stream

Creates a brush stream that generates shapes by fitting the curve and applying an offset according to the radius stored in the points This generates a shape for every set of points that is passed in. The input is the set of points being generated by the UI as the user moves their tool across the canvas, so the shapes generated are made by combining all the points received to this point (so each s

(points: impl 'a + Send + Stream<Item=Vec<BrushPoint>>, max_error: f64)