Geometry Support¶
Contents
arcade.earclip¶
- arcade.earclip(polygon)[source]¶
Simple earclipping algorithm for a given polygon p. polygon is expected to be an array of 2-tuples of the cartesian points of the polygon For a polygon with n points it will return n-2 triangles. The triangles are returned as an array of 3-tuples where each item in the tuple is a 2-tuple of the cartesian point.
- Implementation Reference:
arcade.are_polygons_intersecting¶
- arcade.are_polygons_intersecting(poly_a: Sequence[Union[Tuple[float, float], List[float]]], poly_b: Sequence[Union[Tuple[float, float], List[float]]]) bool [source]¶
Return True if two polygons intersect.
- Parameters
poly_a (PointList) – List of points that define the first polygon.
poly_b (PointList) – List of points that define the second polygon.
- Returns
True or false depending if polygons intersect
- Rtype bool
arcade.rotate_point¶
- arcade.rotate_point(x: float, y: float, cx: float, cy: float, angle_degrees: float) List[float] [source]¶
Rotate a point around a center.
- Parameters
x – x value of the point you want to rotate
y – y value of the point you want to rotate
cx – x value of the center point you want to rotate around
cy – y value of the center point you want to rotate around
angle_degrees – Angle, in degrees, to rotate
- Returns
Return rotated (x, y) pair
- Return type
arcade.calculate_hit_box_points_detailed¶
- arcade.calculate_hit_box_points_detailed(image: <module 'PIL.Image' from '/home/docs/checkouts/readthedocs.org/user_builds/arcade-library/envs/2.6.1/lib/python3.8/site-packages/PIL/Image.py'>, hit_box_detail: float = 4.5)[source]¶
Given an image, this returns points that make up a hit box around it. Attempts to trim out transparent pixels.
- Parameters
image (Image) – Image get hit box from.
hit_box_detail (int) – How detailed to make the hit box. There’s a trade-off in number of points vs. accuracy.
- Returns
List of points