nhf/materials.py

@@ -54,16 +54,18 @@ ROLE_COLOR_MAP = {
 class Material(Enum):
     """
     A catalog of common material properties
+
+    Density listed is in g/cm^3 or mg/mm^3
     """
 
-    WOOD_BIRCH = 0.8, _color('bisque', 0.9)
-    PLASTIC_PLA = 0.5, _color('mistyrose', 0.8)
-    RESIN_TRANSPERENT = 1.1, _color('cadetblue2', 0.6)
-    RESIN_TOUGH_1500 = 1.1, _color('seashell3', 0.7)
-    ACRYLIC_BLACK = 0.5, _color('gray5', 0.8)
-    ACRYLIC_TRANSLUSCENT = 0.5, _color('ivory2', 0.8)
-    ACRYLIC_TRANSPARENT = 0.5, _color('ghostwhite', 0.5)
-    STEEL_SPRING = 1.0, _color('gray', 0.8)
+    WOOD_BIRCH = 0.71, _color('bisque', 0.9)
+    PLASTIC_PLA = 1.2, _color('mistyrose', 0.8)
+    RESIN_TRANSPERENT = 1.17, _color('cadetblue2', 0.6)
+    RESIN_TOUGH_1500 = 1.17, _color('seashell3', 0.7)
+    ACRYLIC_BLACK = 1.18, _color('gray5', 0.8)
+    ACRYLIC_TRANSLUSCENT = 1.18, _color('ivory2', 0.8)
+    ACRYLIC_TRANSPARENT = 1.18, _color('ghostwhite', 0.5)
+    STEEL_SPRING = 7.8, _color('gray', 0.8)
 
     def __init__(self, density: float, color: Cq.Color):
         self.density = density
@@ -110,3 +112,16 @@ def color_by_role(self: Cq.Assembly, avg: bool = True) -> Cq.Assembly:
         a.color = role.color_avg() if avg else role.color_head()
     return self
 Cq.Assembly.color_by_role = color_by_role
+
+def total_mass(self: Cq.Assembly) -> float:
+    """
+    Calculates the total mass in units of g
+    """
+    total = 0.0
+    for _, a in self.traverse():
+        if 'material' not in a.metadata:
+            continue
+        vol = a.toCompound().Volume()
+        total += vol * a.metadata['material'].density
+    return total / 1000.0
+Cq.Assembly.total_mass = total_mass

nhf/touhou/houjuu_nue/__init__.py

@@ -146,11 +146,19 @@ class Parameters(Model):
         bbox = a.toCompound().BoundingBox()
         return {
             "wing-span": bbox.xlen,
-            "wing-thickness": bbox.ylen,
+            "wing-depth": bbox.ylen,
             "wing-height": bbox.zlen,
+            "wing-mass": a.total_mass(),
         }
 
 
 if __name__ == '__main__':
+    import sys
+
     p = Parameters()
+    if len(sys.argv) == 1:
         p.build_all()
+        sys.exit(0)
+
+    if sys.argv[1] == 'stat':
+        print(p.stat())