Upgrade lighting setup and change to 600x600 px.

src/product_gen/generate_shades.py

@@ -1,6 +1,7 @@
 import bpy
 from mathutils import Vector
 import bmesh
+import math
 
 def NormalInDirection(normal, direction, limit = 0.99):
     return abs(direction.dot( normal )) > limit
@@ -13,6 +14,47 @@ def UpOrDown(normal):
         return True
     return False
 
+def generate_pendant_shade(radius1, radius2, depth):
+
+    bpy.ops.mesh.primitive_cylinder_add(radius=radius1,
+                                        depth=depth)
+    cone = bpy.data.objects["Cylinder"]
+    cone.name = "shade"
+    bpy.ops.object.mode_set(mode='EDIT')
+
+    for idx in range(3):
+        bpy.ops.mesh.subdivide()
+        
+    bm = bmesh.from_edit_mesh(cone.data)
+    for i in range( len( bm.verts ) ):
+        bm.verts.ensure_lookup_table()
+        vert = bm.verts[i]
+        theta = math.atan2(vert.co.x, vert.co.y)
+        delta = abs(vert.co.z-depth/2.0)
+        
+        mapped_rad = radius2 + delta**2
+        vert.co.x = mapped_rad*math.sin(theta)
+        vert.co.y = mapped_rad*math.cos(theta)
+        
+    for face in bm.faces:
+        if UpOrDown(face.normal):
+            face.select = True
+        else:
+            face.select = False 
+    faces_select = [f for f in bm.faces if f.select] 
+    bmesh.ops.delete(bm, geom=faces_select, context=3)
+    bmesh.update_edit_mesh(cone.data, True)
+      
+    # Extrude faces
+    bpy.ops.mesh.select_mode( type  = 'FACE'   )
+    bpy.ops.mesh.select_all( action = 'SELECT' )
+    bpy.ops.mesh.extrude_region_move(
+        TRANSFORM_OT_translate={"value":(0, 0, 0.01)} ) 
+    bpy.ops.mesh.extrude_region_shrink_fatten(
+        TRANSFORM_OT_shrink_fatten={"value":-0.05})
+    bpy.ops.object.mode_set(mode='OBJECT')
+    return cone
+
 def generate_cone_shade(radius1, radius2, depth):
 
     bpy.ops.mesh.primitive_cone_add(radius1=radius1,