Initial import

utils.py

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+import shutil
+import tempfile
+from math import floor
+
+import cadquery as cq
+from cadquery import exporters
+
+
+def extrude_shape(*, model, face, w, h, x_offset, y_offset, element, height):
+    return (
+        model.faces(face)
+        .workplane(centerOption="CenterOfBoundBox")
+        .center(-w / 2 + x_offset + element["x"], -h / 2 + y_offset + element["y"])
+        .placeSketch(element["shape"])
+        .extrude(height)
+    )
+
+
+def punch_hole(*, model, face, w, h, x_offset, y_offset, hole, depth):
+    return (
+        model.faces(face)
+        .workplane(centerOption="CenterOfBoundBox")
+        .center(-w / 2 + x_offset + hole["x"], -h / 2 + y_offset + hole["y"])
+        .placeSketch(hole["shape"])
+        .cutBlind(-depth)
+    )
+
+
+def extrude_shape2(*, model, face, w, h, x_offset, y_offset, hole, depth):
+    return (
+        model.faces(face)
+        .workplane(centerOption="CenterOfBoundBox")
+        .center(-w / 2 + x_offset + hole["x"], -h / 2 + y_offset + hole["y"])
+        .placeSketch(hole["shape"])
+        .extrude(-depth)
+    )
+
+
+def hex_vents(*, size, width, height, density=0.85):
+    # size is radius of the hexagon
+    # Information about how this works:
+    # https://www.redblobgames.com/grids/hexagons/
+
+    x_step = size * (3**0.5)
+    y_step = size * 3 / 2
+
+    x_count = floor(width / x_step) - 1
+
+    if height > 4 * size:
+        y_count = floor((height - 2 * size) / (1.5 * size))
+    else:
+        y_count = 1
+
+    x_size = (x_count + 0.5) * x_step  # Assumes at least 2 rows
+    y_size = 2 * size + 1.5 * size * (y_count - 1)
+
+    x_offset = (width - x_size) / 2 + 0.5 * x_step
+    y_offset = (height - y_size) / 2 + size
+
+    vent_positions = []
+    for x in range(0, x_count):
+        for y in range(0, y_count):
+            vent_positions.append(
+                (
+                    (x + (y % 2) / 2) * x_step + x_offset,
+                    y * y_step + y_offset,
+                )
+            )
+    vents = [
+        {
+            "x": 0,
+            "y": 0,
+            "shape": cq.Sketch().push(vent_positions).regularPolygon(size * density, 6),
+        }
+    ]
+
+    return vents
+
+
+def export(model, fname, **kwarg):
+    tmpfile = tempfile.mktemp(suffix="." + fname.split(".")[-1])
+    exporters.export(model, tmpfile, **kwarg)
+    shutil.move(tmpfile, fname)