feat: Add tripod attachment point

nhf/tool/light_panel.py

@@ -13,7 +13,11 @@ class LightPanel(Model):
     length: float = 300.0
     width: float = 200.0
 
-    grid_height: float = 30.0
+    attach_height: float = 20.0
+    attach_diam: float = 8.0
+    attach_depth: float = 12.7
+
+    grid_height: float = 20.0
     grid_top_height: float = 5.0
     # Distance from grid to edge
     grid_margin: float = 20.0
@@ -33,6 +37,10 @@ class LightPanel(Model):
         assert self.grid_holes >= 2
         super().__init__(name="light-panel")
 
+    @property
+    def grid_spacing_y(self) -> float:
+        return (self.width - 2 * self.grid_margin - self.grid_thickness) / (self.grid_layers - 1)
+
     @target(name="grid", kind=TargetKind.DXF)
     def grid_profile(self):
         w = self.length - self.grid_margin * 2
@@ -87,6 +95,21 @@ class LightPanel(Model):
             thickness=self.base_thickness,
         )
 
+    @target(name="attachment")
+    def attachment(self) -> Cq.Workplane:
+        l = self.length / 2
+        w = self.width / 2
+        return (
+            Cq.Workplane('XY')
+            .box(
+                l, w, self.attach_height,
+                centered=(True, True, False),
+            )
+            .faces(">Z")
+            .hole(self.attach_diam, self.attach_depth)
+        )
+
+
     def assembly(self) -> Cq.Assembly:
         assembly = (
             Cq.Assembly()
@@ -99,7 +122,7 @@ class LightPanel(Model):
         )
         # Grid thickness t is fixed, so the spacing of the grid satisfies
         # margin + t + (n-1) * spacing + margin = width
-        spacing = (self.width - 2 * self.grid_margin - self.grid_thickness) / (self.grid_layers - 1)
+        spacing = self.grid_spacing_y
         shift = self.grid_margin + self.grid_thickness / 2
         for i in range(self.grid_layers):
             assembly = assembly.addS(
@@ -116,6 +139,8 @@ if __name__ == '__main__':
     import sys
 
     p = LightPanel()
+    print(p.grid_spacing_y)
+
     if len(sys.argv) == 1:
         p.build_all()
         sys.exit(0)