#!BPY
"""
Name: 'Blend Vertices'
Blender: 248.1
Group: 'Mesh'
Tooltip: 'Copy selected vertex positions from one object to another'
"""

__author__ = "Ivo Grigull"
__url__ = ["www.ivogrigull.com"]
__version__ = "0.1"
__bpydoc__ = """\

Blend Vertices - Copy selected vertex positions from one object to another
--------------------------------------------------------------------

Menu: Mesh->Scripts->Blend Vertices

This script copies vertex positions between two objects. Both objects need to have the
same topology (i.e. created as a copy of the other).

This script is useful for modelling shapes (if you do them as seperate obejcts) to
revert changes to the original mesh.


Usage:
	In Object.Mode first Select the source obejct, then the target object. Enter
	Edit-Mode and select some vertices on the target mesh. Execute the script.
	In the popup menu you can set a blend factor if you want to blend only a little bit.
	


# -------------------------------------------------------------------------- 
# ***** 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 ***** 
# 

"""

import Blender
from Blender import Window

def blend( fact ):
	in_editmode = Window.EditMode()
	if in_editmode: Window.EditMode(0)
	
	sel = Blender.Object.GetSelected()
		
	target = sel[0].getData(mesh=1)
	source = sel[1].getData(mesh=1)
	
	print 'Target: %s Source %s' % (sel[0].name, sel[1].name )
	
	verts = target.verts
	verts_sel= [f for f in verts if f.sel]
	
	
	for n in verts_sel:

		v1 = target.verts[ n.index ].co
		v2 = source.verts[ n.index ].co
		 
		v1 -= v2
		v1 *= 1-fact
		v1 += v2
		target.verts[ n.index ].co = v1
	
	target.update()
	Blender.Redraw()
	if in_editmode: Window.EditMode(1)
	
def main():

	sel = Blender.Object.GetSelected()
	if len(sel) < 2:
		print 'First select two objects please'
		return

	fac = Blender.Draw.Create( 1.0 )
	
	block = []
	block.append("Amount")
	block.append(("Value: ", fac, 0.0, 1.0))
	
	retval = Blender.Draw.PupBlock("Blend vertices", block)
	
	blend( fac.val )
	
	
	
main()