37 lines
1.2 KiB
Python
37 lines
1.2 KiB
Python
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"""
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Operations on planar geometry (usually used for laser cutting parts)
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"""
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import math
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from typing import Tuple
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import cadquery as Cq
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def extrude_with_markers(
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sketch: Cq.Sketch,
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thickness: float,
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tags: list[Tuple[str, Cq.Location]],
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reverse: bool = False):
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"""
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Extrudes a sketch and place tags on the sketch for mating.
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Each tag is of the format `(name, loc)`, where the (must be 2d) location's
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angle is specifies in degrees counterclockwise from +X. Two marks are
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generated for each `name`, "{name}" for the location (with normal) and
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"{name}_dir" for the directrix specified by the angle.
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This simulates a process of laser cutting and bonding (for wood and acrylic)
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"""
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result = (
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Cq.Workplane('XY')
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.placeSketch(sketch)
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.extrude(thickness)
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)
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plane = result.faces("<Z" if reverse else ">Z").workplane()
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sign = -1 if reverse else 1
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for tag, p in tags:
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(x, y), angle = p.to2d()
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theta = sign * math.radians(angle)
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direction = (math.cos(theta), math.sin(theta), 0)
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plane.moveTo(x, sign * y).tagPlane(tag)
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plane.moveTo(x, sign * y).tagPlane(f"{tag}_dir", direction)
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return result
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