How to make this script to quickly set specific weights? (Screenshot attached)


(nicmarxp) #1

I have an idea how to get a faster workflow when assigning weights in edit mode, and would like to know how hard this would be to make in python as an addon:

I’m manually setting weights using this method:

  1. Select one or more vertices
  2. Select a vertex group
  3. Choose a weight
  4. Click Assign

If I’m not happy with it, repeat 3-4 until I’m happy. This can be quite cumbersome.

With my addon, it would be one less step, like this:

  1. Select one or more vertices
  2. Select a vertex group
  3. Click 20 - And 0.2 is assigned in one click

If I’m not happy with it, I just click another value. It would save a lot of time for me.

And as an extra bonus, if this is possible, there is also a Liveweight slider, that updates the vertex group as I drag the slider, and I see the result right away. Pretty much like the Vertex weights in the Properties panel, but this affects all selected vertices.

Would this be possible, and where would I start? I have never coded anything in python, but I’ve been coding for a long time, mostly PHP and Javascript, so I think I can figure out the basics, if I get some pointers.

Also, is it possible to put this inside the Vertex Group section, or does it need to be in a separate panel? I’ve attached a rough screenshot of my idea as a separate panel.

EDIT: After some fiddling, this is what I got, however the buttons are not showing up. Why?

Also how do I assign weights to the current vertices in the selected group? I will study the documentation a bit more, but any help would be nice :slight_smile:

bl_info = {    "name": "Quickly set weights of Vertex Groups",
    "author": "nicmar",
    "version": (1, 0),
    "blender": (2, 78, 0),
    "location": "Properties Editor > Object data > Vertex Groups",
    "description": "Quickly set Vertex Groups with assigned weight and live edit",
    "warning": "",
    "wiki_url": "",
    "category": "Mesh"}


import bpy
from bpy.types import Panel


class QuickWeightPanel(Panel):
    bl_label = "Quick Vertex Weights"
    bl_space_type = "PROPERTIES";
    bl_region_type = "WINDOW";
    bl_context = "data"
       
    def draw(self,context):
        layout = self.layout


        row = layout.row(align=True)
        row.alignment = 'EXPAND'
        row.operator("my.button", text="0").number=0
        row.operator("my.button", text="10").number=0.1
        row.operator("my.button", text="25").number=0.25
        row.operator("my.button", text="40").number=0.4
        row.operator("my.button", text="50").number=0.5
        row.operator("my.button", text="60").number=0.6
        row.operator("my.button", text="75").number=0.75
        row.operator("my.button", text="90").number=0.9
        row.operator("my.button", text="100").number=1


def register():
    bpy.utils.register_module(__name__)




def unregister():
    bpy.utils.unregister_module(__name__)


if __name__ == "__main__":
    register()

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