diff --git a/add_mesh_gem.py b/add_mesh_gem.py
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+++ b/add_mesh_gem.py
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+# add_mesh_gem.py Copyright (C) 2010, Dreampainter
+#
+# add gem to the blender 2.50 add->mesh menu
+# ***** BEGIN GPL LICENSE BLOCK *****
+#
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+# ***** END GPL LICENCE BLOCK *****
+
+# Blender Add-Ons menu registration (in User Prefs)
+"Add Gem (View3D > Add > Mesh > Gem)"
+
+"""
+Name: 'Gem'
+Blender: 250.1
+Group: 'AddMesh'
+Tip: 'Add Gem Object...'
+__author__ = ["Dreampainter"]
+__version__ = '1.0.1'
+__url__ = ["http://blenderartists.org/forum/showpost.php?p=1564840&postcount=173"]
+email__=["n/a"]
+
+
+Usage:
+
+* Launch from Add Mesh menu
+
+* Modify parameters as desired or keep defaults
+
+"""
+
+import bpy
+import Mathutils
+from math import cos,sin,pi
+from bpy.props import IntProperty, FloatProperty, BoolProperty
+def add_gem(r1, r2, seg, h1, h2):
+ """
+ r1 = pavillion radius
+ r2 = crown radius
+ seg = number of segments
+ h1 = pavillion height
+ h2 = crown height
+ Generates the vertices and faces of the gem
+ """
+
+ tot_verts = 2 + 4 * seg
+ tot_faces = 6 * seg
+ a = 2*pi/seg # angle between segments
+ offset = a/2.0 # middle between segments
+
+ r3 = ((r1+r2)/2.0)/cos(offset) # middle of crown
+ r4 = (r1/2.0)/cos(offset) # middle of pavillion
+ h3 = h2/2.0 # middle of crown height
+ h4 = -h1/2.0 # middle of pavillion height
+ verts = [0,0,-h1,0,0,h2]
+ for i in range(seg):
+ s1 = sin(i*a)
+ s2 = sin(offset+i*a)
+ c1 = cos(i*a)
+ c2 = cos(offset+i*a)
+ verts.extend([ r4*s1,r4*c1,h4,r1*s2,r1*c2,0,
+ r3*s1,r3*c1,h3,r2*s2,r2*c2,h2 ])
+ faces = []
+
+ for index in range(seg):
+ i = index*4
+ j = ((index+1)%seg)*4
+ faces.extend([0, j+2, i+3, i+2])
+ faces.extend([i+3, j+2, j+3, i+3])
+ faces.extend([i+3, j+3, j+4, i+3])
+ faces.extend([i+3, j+4, i+5, i+4])
+ faces.extend([i+5, j+4, j+5, i+5])
+ faces.extend([i+5, j+5, 1 , i+5])
+ return verts, faces, tot_verts, tot_faces
+
+class Parameter_Panel_Gem(bpy.types.Panel):
+ bl_space_type = "VIEW_3D"
+ bl_region_type = "TOOLS"
+ bl_context = "objectmode"
+ bl_label = "Gem parameters"
+ def poll(self, context):
+ # only show this panel if the object selected has propertie "Gem"
+ try:
+ return "Gem" in context.object
+ except TypeError: return False
+ def draw(self,context):
+ layout = self.layout
+ layout.operator("Gem_Parameter_Edit", text="Edit")
+class EditGem(bpy.types.Operator):
+ """Reapply the operator"""
+ bl_idname = "Gem_Parameter_Edit"
+ bl_label = "Edit Gem"
+ def invoke(self,context,event):
+ # invoke the adding operator again,
+ # only this time with the Edit property = true
+ ob = context.active_object
+ bpy.ops.mesh.primitive_gem_add(Edit = True,
+ segments=ob["Segments"],
+ pav_radius = ob["pav_radius"],
+ crown_radius = ob["tab_radius"],
+ crown_height = ob["tab_height"],
+ pav_height = ob["pav_height"])
+ return {'FINISHED'}
+class AddGem(bpy.types.Operator):
+ """Add a diamond gem"""
+ bl_idname = "mesh.primitive_gem_add"
+ bl_label = "Add Gem"
+ bl_description = "Create an offset faceted gem."
+ bl_options = {'REGISTER', 'UNDO'}
+ Edit = BoolProperty(name = "", description = "",
+ default = False, options = {'HIDDEN'}) # whether to add or update
+ segments = IntProperty(name = "Segments",
+ description="Longitudial segmentation",
+ default=8, min=3, max=265)
+ pav_radius = FloatProperty(name = "Radius",
+ description="Radius of the gem",
+ default = 1.0, min = 0.01, max = 100.0)
+ crown_radius = FloatProperty(name = "Table Radius",
+ description = "Radius of the table(top).",
+ default = 0.6, min = 0.01, max = 100.0)
+ crown_height = FloatProperty(name = "Table height",
+ description = "Height of the top half.",
+ default = 0.35, min = 0.01, max = 100.0)
+ pav_height = FloatProperty(name = "Pavillion height",
+ description = "Height of bottom half.",
+ default = 0.8, min = 0.01, max = 100.0)
+
+ def execute(self, context):
+ # create mesh
+ verts, faces, nV, nF = add_gem(self.properties.pav_radius,
+ self.properties.crown_radius,
+ self.properties.segments,
+ self.properties.pav_height,
+ self.properties.crown_height)
+
+ mesh = bpy.data.meshes.new("Gem")
+ mesh.add_geometry(nV,0,nF)
+ mesh.verts.foreach_set("co",verts)
+ mesh.faces.foreach_set("verts_raw",faces)
+ mesh.update()
+ if self.properties.Edit:
+ # only update
+ ob_new = context.active_object
+ bpy.ops.object.mode_set(mode='EDIT')
+ bpy.ops.mesh.select_all(action='SELECT')
+ bpy.ops.mesh.delete(type = 'VERT')
+ bpy.ops.object.mode_set(mode='OBJECT')
+
+ ob_new.data = mesh
+
+ scene = context.scene
+
+ # ugh
+ for ob in scene.objects:
+ ob.selected = False
+
+ ob_new.selected = True
+ scene.objects.active = ob_new
+ bpy.ops.object.shade_flat()
+ else:
+ # create new object
+ scene = context.scene
+
+ # ugh
+ for ob in scene.objects:
+ ob.selected = False
+
+ ob_new = bpy.data.objects.new("Gem", mesh)
+ ob_new.data = mesh
+ scene.objects.link(ob_new)
+ ob_new.selected = True
+
+ ob_new.location = scene.cursor_location
+
+ obj_act = scene.objects.active
+
+ if obj_act and obj_act.mode == 'EDIT':
+ # if the mesh is added in edit mode, add the mesh to the
+ # excisting mesh
+ bpy.ops.object.mode_set(mode='OBJECT')
+
+ obj_act.selected = True
+ scene.update() # apply location
+
+ bpy.ops.object.join() # join into the active.
+
+ bpy.ops.object.mode_set(mode='EDIT')
+ else:
+ # add new object and make faces flat
+ scene.objects.active = ob_new
+ bpy.ops.object.shade_flat()
+ if context.user_preferences.edit.enter_edit_mode:
+ bpy.ops.object.mode_set(mode='EDIT')
+ # add custom properties to the object to make the edit parameters
+ # thingy work
+ ob_new["Gem"] = 1
+ ob_new["Segments"] = self.properties.segments
+ ob_new["pav_radius"] = self.properties.pav_radius
+ ob_new["tab_radius"] = self.properties.crown_radius
+ ob_new["pav_height"] = self.properties.pav_height
+ ob_new["tab_height"] = self.properties.crown_height
+ return {'FINISHED'}
+
+# register all operators and panels
+
+
+menu_func = (lambda self, context: self.layout.operator(AddGem.bl_idname,
+ text="Gem", icon='GEARS'))
+
+def register():
+ bpy.types.register(AddGem)
+ bpy.types.register(Parameter_Panel_Gem)
+ bpy.types.register(EditGem)
+ bpy.types.INFO_MT_mesh_add.append(menu_func)
+
+def unregister():
+ bpy.types.unregister(AddGem)
+ bpy.types.INFO_MT_mesh_add.remove(menu_func)