133 lines
4.4 KiB
Python
133 lines
4.4 KiB
Python
import cadquery as cq
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from cadquery import exporters
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import dimensions as dim
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viewport_cutout = (
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cq.Sketch().trapezoid(dim.vis_w, dim.vis_h, 90, mode="a").vertices().fillet(2)
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)
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screen_cutout = cq.Sketch().trapezoid(dim.scr_w, dim.scr_h, 90, mode="a")
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# Circuit board and cable hole.
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# This is in the back of the screen, and is a bit shorter in height than the
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# screen. It's wider so it removes enough material to make the shape simpler.
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board_cutout = cq.Sketch().trapezoid(
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dim.scr_w + 5,
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dim.scr_h - 10,
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90,
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mode="a",
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)
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kbd_cable_hole = cq.Sketch().trapezoid(20, 9, 90, mode="a").vertices().fillet(1)
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# y needs to be inverted because this is the top side, adn there's 2 pillars we don't use
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dim.mounting_pillar_positions = [(x, -y) for x, y in dim.mounting_pillar_positions[:-2]]
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mounting_pillars = (
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cq.Sketch()
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.push(dim.mounting_pillar_positions)
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.trapezoid(-12, 12, 90, mode="a")
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.circle(dim.ti_radius, mode="s")
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.clean()
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)
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def model():
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return (
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cq.Workplane("XY")
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.workplane()
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.tag("mid_height")
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.box(dim.width, dim.tl_height, dim.tl_full_thickness)
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# The screen goes rotated
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.faces(">Z")
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.transformed(rotate=(dim.tl_scr_angle, 0, 0))
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# Move the screen "lower" so it doesn't interfere
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# so much with the back
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.center(0, -2)
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.tag("slanted")
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# Arbitrary huge trapezoid to cut off the material *in front*
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# of the inclined screen
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.placeSketch(cq.Sketch().trapezoid(1000, 1000, 90, mode="a"))
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.cutBlind(1000)
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# Trim the top
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.workplaneFromTagged("mid_height")
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.workplane(offset=21)
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.placeSketch(cq.Sketch().trapezoid(1000, 1000, 90, mode="a"))
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.cutBlind(100)
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# Make bottom smaller to fit with base
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.faces(">X")
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.workplane(centerOption="CenterOfBoundBox")
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.center(-dim.tl_height / 2, -dim.tl_full_thickness / 2)
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.placeSketch(
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cq.Sketch()
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.polygon(
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[
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(dim.tl_height_bottom, 0),
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(dim.tl_height_bottom, dim.tl_full_thickness / 3),
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(dim.tl_height, dim.tl_full_thickness - 21),
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(dim.tl_height, dim.tl_full_thickness),
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(dim.tl_height + 5, dim.tl_full_thickness + 5),
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(dim.tl_height + 5, 0),
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(dim.tl_height_bottom, 0),
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]
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)
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.vertices()
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.fillet(3)
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)
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.cutBlind(-1000)
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# Fillet top of the object
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.edges("|X and >Z")
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.fillet(3)
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# Cut off viewport hole so we can see the screen
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.workplaneFromTagged("slanted")
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.placeSketch(viewport_cutout)
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.cutBlind(-dim.shell_t)
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# Make hole for screen assembly so the whole screen fits
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.workplaneFromTagged("slanted")
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.workplane(offset=-dim.shell_t, centerOption="CenterOfBoundBox")
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# Left bezel is wider than right one, so this hole is displaced to the left
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.center(-3, 0)
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.placeSketch(screen_cutout)
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.cutBlind(-dim.scr_thickness)
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# Make it hollow
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.faces("<Z")
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# Can't be exactly shell_t because cq fails
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.shell(-dim.shell_t + 0.01)
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# Cut hole for the screen board and cables
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.workplaneFromTagged("slanted")
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.workplane(offset=-dim.scr_thickness, centerOption="CenterOfBoundBox")
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.placeSketch(board_cutout)
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.cutBlind(-6)
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.workplaneFromTagged("mid_height")
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.workplane(offset=-dim.tl_full_thickness / 2, centerOption="CenterOfBoundBox")
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.center(-dim.width / 2, dim.tl_height_bottom - dim.tl_height / 2 - dim.shell_t)
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.placeSketch(mounting_pillars)
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.extrude(10)
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# Fillet the front edge of the screen case so it looks softer
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.edges(">(0, -10, 5)")
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.fillet(2)
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)
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if __name__ == "__main__":
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model = model()
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exporters.export(model, "tandy_lid.stl")
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offset_width = -dim.width / 2
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right_side = (
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model.faces(">X")
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.workplane(centerOption="CenterOfBoundBox", offset=offset_width)
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.split(keepTop=True)
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)
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exporters.export(right_side, "tandy_lid_right.stl")
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left_side = (
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model.faces(">X")
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.workplane(centerOption="CenterOfBoundBox", offset=offset_width)
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.split(keepBottom=True)
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)
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exporters.export(left_side, "tandy_lid_left.stl")
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