Introduced with notation for workplanes and points

examples/lego.py

@@ -0,0 +1,96 @@
+"""
+
+name: lego.py
+by:   Gumyr
+date: September 12th 2022
+
+desc:
+
+    This example creates a model of a double wide lego block with a
+    parametric length (pip_count).
+
+license:
+
+    Copyright 2022 Gumyr
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+"""
+from build123d import *
+from cadquery import Plane
+
+pip_count = 6
+
+lego_unit_size = 8
+pip_height = 1.8
+pip_diameter = 4.8
+block_length = lego_unit_size * pip_count
+block_width = 16
+base_height = 9.6
+block_height = base_height + pip_height
+support_outer_diameter = 6.5
+support_inner_diameter = 4.8
+ridge_width = 0.6
+ridge_depth = 0.3
+wall_thickness = 1.2
+
+with BuildPart() as lego:
+    # Draw the bottom of the block
+    with BuildSketch():
+        # Start with a Rectangle the size of the block
+        perimeter = Rectangle(block_length, block_width)
+        # Subtract an offset to create the block walls
+        Offset(
+            perimeter,
+            amount=-wall_thickness,
+            kind=Kind.INTERSECTION,
+            mode=Mode.SUBTRACT,
+        )
+        # Add a grid of lengthwise and widthwise bars
+        with GridLocations(0, lego_unit_size, 1, 2):
+            Rectangle(block_length, ridge_width)
+        with GridLocations(lego_unit_size, 0, pip_count, 1):
+            Rectangle(ridge_width, block_width)
+        # Substract a rectangle leaving ribs on the block walls
+        Rectangle(
+            block_length - 2 * (wall_thickness + ridge_depth),
+            block_width - 2 * (wall_thickness + ridge_depth),
+            mode=Mode.SUBTRACT,
+        )
+        # Add a row of hollow circles to the center
+        with GridLocations(lego_unit_size, 0, pip_count - 1, 1):
+            Circle(support_outer_diameter / 2)
+            Circle(support_inner_diameter / 2, mode=Mode.SUBTRACT)
+    # Extrude this base sketch to the height of the walls
+    Extrude(base_height - wall_thickness)
+    # Create a workplane on the top of the walls
+    with Workplanes(
+        Plane(origin=(0, 0, base_height - wall_thickness), normal=(0, 0, 1))
+    ):
+        # Create the top of the block
+        Box(
+            block_length,
+            block_width,
+            wall_thickness,
+            centered=(True, True, False),
+        )
+    # Create a workplane on the top of the block
+    with Workplanes(lego.faces().sort_by(SortBy.Z)[-1]):
+        # Create a grid of pips
+        with GridLocations(lego_unit_size, lego_unit_size, pip_count, 2):
+            Cylinder(
+                radius=pip_diameter / 2, height=pip_height, centered=(True, True, False)
+            )
+
+
+if "show_object" in locals():
+    show_object(lego.part, name="lego")