trimesh.path.arc¶
Functions
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Given three points on an arc find: center, radius, normal, and angle. |
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Returns a version of a three point arc consisting of line segments. |
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For 2D arcs, given a center and radius convert them to three points on the arc. |
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trimesh.path.arc.arc_center(points)¶ Given three points on an arc find: center, radius, normal, and angle.
This uses the fact that the intersection of the perp bisectors of the segments between the control points is the center of the arc.
- Parameters
points ((3, dimension) float) – Points in space, where dimension is either 2 or 3
- Returns
result – Contains the arc center and other information: {‘center’ : (d,) float, cartesian center of the arc
’radius’ : float, radius of the arc ‘normal’ : (3,) float, the plane normal. ‘angle’ : (2,) float, angle of start and end in radians ‘span’ : float, angle swept by the arc in radians}
- Return type
dict
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trimesh.path.arc.discretize_arc(points, close=False, scale=1.0)¶ Returns a version of a three point arc consisting of line segments.
- Parameters
points ((3, d) float) – Points on the arc where d in [2,3]
close (boolean) – If True close the arc into a circle
scale (float) – What is the approximate overall drawing scale Used to establish order of magnitude for precision
- Returns
discrete – Connected points in space
- Return type
(m, d) float
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trimesh.path.arc.to_threepoint(center, radius, angles=None)¶ For 2D arcs, given a center and radius convert them to three points on the arc.
- Parameters
center ((2,) float) – Center point on the plane
radius (float) – Radius of arc
angles ((2,) float) – Angles in radians for start and end angle if not specified, will default to (0.0, pi)
- Returns
three – Arc control points
- Return type
(3, 2) float