colorize the case and the phone separately when exporting images

src/case.py

@@ -44,6 +44,17 @@ battery_harness_shell_thickness = 0.8
 battery_harness_margin_bottom = 21.0
 battery_harness_margin_top = 2.0
 
+dark_gray = cq.Color(95/256, 87/256, 79/256)
+mid_gray = cq.Color(128/256, 118/256, 108/256)
+mid_light_gray = cq.Color(160/256, 150/256, 140/256)
+light_gray = cq.Color(192/256, 182/256, 172/256)
+yellow = cq.Color(255/256, 236/256, 39/256)
+orange = cq.Color(255/256, 192/256, 39/256)
+yellow_orange = cq.Color(255/256, 208/256, 49/256)
+
+body_color = mid_light_gray
+case_color = yellow_orange
+
 def _thicken(solid, thickness: float=1, combine=False, **kwargs):
     """
     dilate the solid in all dimensions by `thickness` and then subtract the original.
@@ -335,7 +346,7 @@ def orient_for_printing(case):
     """
     return case.rotate((0, 0, 0), (1000, 0, 0), angleDegrees=180)
 
-def case(phone, battery=None, render_phone: bool=False):
+def case(phone, battery=None, render_phone: bool=False, as_assy: bool=True):
     body = phone.solids(tag="body")
     power = phone.solids(tag="power")
     volume = phone.solids(tag="volume")
@@ -368,8 +379,15 @@ def case(phone, battery=None, render_phone: bool=False):
 
     # TODO: compress the case along the Z axis, to give a snugger fit (0.8mm is a good compression)
 
-    if render_phone:
-        case = case.union(phone)
-
     case = orient_for_printing(case)
+    phone = orient_for_printing(phone)
+
+    if as_assy:
+        case = cq.Assembly(case, color=case_color)
+        if render_phone:
+            case = case.add(phone, color=body_color)
+    else:
+        if render_phone:
+            case = case.union(phone)
+
     return case