Painting Vertex Color Map using selected Faces

This script is obsolete, shift+K will fill all selected faces/ verts with the brush colour.

selected faces

During a recent conversation with Jimmy Gunawan of blendersushi I remembered that I wanted to write a script that lets me paint the vertex color map as a function of which faces are selected. Here's a version of this script that runs in vertex paint mode with face masking mode on.

	import bpy
	# instructions:
	# "Use face masking mode, while in Vertex Paint mode"
	def make_paint_list(my_object, faces):
	# paint_list will contain all vertex color map indices to
	# be used for overpainting.
	paint_list = []
	i = 0
	for poly in my_object.polygons:
	face_is_selected = poly.index in faces
	for idx in poly.loop_indices:
	if face_is_selected:
	paint_list.append(i)
	i += 1
	return paint_list
	def do_painting(color_map, paint_list):
	print("vertex color indices: ", paint_list)
	for i in paint_list:
	color_map.data[i].color = color_choice
	bpy.ops.object.mode_set(mode='VERTEX_PAINT')
	def find_and_paint(color_choice):
	my_object = bpy.context.active_object.data
	# use active color map, create one if none available
	if not my_object.vertex_colors:
	my_object.vertex_colors.new()
	color_map = my_object.vertex_colors.active
	# find selected faces
	bpy.ops.object.mode_set(mode='OBJECT')
	faces = [f.index for f in my_object.polygons if f.select]
	print("selected faces: ", faces)
	paint_list = make_paint_list(my_object, faces)
	do_painting(color_map, paint_list)
	def vertex_paint_mode():
	return (bpy.context.active_object.mode == 'VERTEX_PAINT')
	def face_masking():
	return bpy.context.active_object.data.use_paint_mask
	if vertex_paint_mode() and face_masking():
	color_choice = (0.2, 0.3, 0.7)
	find_and_paint(color_choice)
	else:
	print("Use face masking mode, while in Vertex Paint mode")

view raw vertex_color_map_setting.py hosted with ❤ by GitHub

i'll leave refactoring this snippet to you.

I've limited some freedom by forcing the user to be in 'VERTEX_PAINT' and Face Masking Active, but it's safer this way (even after some bugfixing by campbell) -- as it is still easy to crash blender in obscure ways otherwise.