Forums Technical Discussion Capture weights cleanup with a Point Wrangle

Capture weights cleanup with a Point Wrangle

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SWest
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Hi, it feel a bit embarrassing to ask for help but since people are very helpful in this community why not ask?

My capture weights for a KineFX rig has some incorrect influences so the idea is to go VEX using a Point Wrange for that.

Here's my algorithm so far:

// if point in prim group called group:tongue1
if ( inprimgroup ( 0, "tongue1", @primnum ) )

// go through all boneCapture regn[n]

// if influence from Jaw_1 or Jaw_2 is found, delete it or set it to 0

Do you happen to know some or all of the missing syntax?
Interested in character concepts, modeling, rigging, and animation. Related tool dev with Py and VEX.
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tamte
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https://www.sidefx.com/forum/topic/86029/ [www.sidefx.com]
Tomas Slancik
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Framestore, NY
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SWest
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tamte
https://www.sidefx.com/forum/topic/86029/ [www.sidefx.com]

Thanks for the reply.

The case is so that it is only the tongue group that should get rid of all weights from joints Jaw_1 and Jaw_2.

If the VEX function find() only run once to return the index of a given string maybe it is meaningful to add a Capture Attribute Unpack node. However, for "simplicity" (less nodes and more VEX) maybe it is possible to do this without it. The author also mentions "It's a little counter-intuitive" so I'll avoid that route for now.

The method to use Capture Correct SOP I've been using for optimization to remove tiny small weights. However, I don't see how to easily limit the effect to only a given group (such as tongue_1)

Probably I'll just have to learn this from the basics (VEX). Thanks anyway.

Edit: In the initial example getting the group works, and can be used to set a color. Now I just want to filter out specific capture regions (using strings, not integers) and initially set them to 0.
Edited by SWest - Sept. 16, 2023 04:28:33
Interested in character concepts, modeling, rigging, and animation. Related tool dev with Py and VEX.
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SWest
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It took a couple of hours to learn this because I almost know no VEX, but this is what was expected:

// VEX used to delete joint influence
// SWest 2023

// Dependencies: 
// place this VEX in a pointwrangle node (it support group filtering)
// add a captureattributeunpack before it 
// add a captureattributepack node after 

// TUI
string influences_to_delete[] = {"Jaw_1","Jaw_2"};

// routine
string influence_to_delete;
for(int i = 0; i < len(influences_to_delete); i++)
{
influence_to_delete = influences_to_delete[i];
string joint_names[] = detail(0, "boneCapture_pCaptPath", 0);
int joint_index = find(joint_names, influence_to_delete);
i[]@boneCapture_index;
f[]@boneCapture_data;
int find_res = find(@boneCapture_index, joint_index);
pop( @boneCapture_index, find_res );
pop( @boneCapture_data, find_res );
}

Attachments:
output.gif (682.3 KB)

Interested in character concepts, modeling, rigging, and animation. Related tool dev with Py and VEX.
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