vispy.visuals.collections.agg_fast_path_collection module#

Antigrain Geometry Fast Path Collection

This collection provides antialiased and accurate paths with caps and miter joins. It consume x4 more memory than regular lines and is a bit slower, but the quality of the output is worth the cost. Note that no control can be made on miter joins which may result in some glitches on screen.

class vispy.visuals.collections.agg_fast_path_collection.AggFastPathCollection(user_dtype=None, transform=None, vertex=None, fragment=None, **kwargs)#

Bases: Collection

Antigrain Geometry Fast Path Collection

append(P, closed=False, itemsize=None, **kwargs)#

Append a new set of vertices to the collection.

For kwargs argument, n is the number of vertices (local) or the number of item (shared)

Parameters:

Pnp.array: Vertices positions of the path(s) to be added
closed: bool: Whether path(s) is/are closed
itemsize: int or None: Size of an individual path
capslist, array or 2-tuple: Path start /end cap
colorlist, array or 4-tuple: Path color
linewidthlist, array or float: Path linewidth
antialiaslist, array or float: Path antialias area

bake(P, key='curr', closed=False, itemsize=None)#

Given a path P, return the baked vertices as they should be copied in the collection if the path has already been appended.

Examples

>>> paths.append(P)
>>> P *= 2
>>> paths['prev'][0] = bake(P,'prev')
>>> paths['curr'][0] = bake(P,'curr')
>>> paths['next'][0] = bake(P,'next')

draw(mode='triangle_strip')#: Draw collection