ped morphing

[long_gone]

 

Hello everyone, I'm hopping to find such "body part" vertex shader just like one from @Ren_712(https://forum.multitheftauto.com/topic/105160-custom-ped-morphing-18/?do=findComment&comment=907439)

Or if someone could - explain how to implement something like that(I have superficial knowledge how shaders work)
 

 

@Ren_712

[The_GTA]

I am interested in the mathematics behind ped "skinning". I know that a ped skin is defined as a map, where vertices are keys and a set of bones with a weight-number are the values. From what I'd imagine the weight-number should be a value between 0..1, the sum of all the weight-numbers for a single vertex should equal 1. So is my assumption correct that the skinned position of each vertex is the sum of all relative-to-bone positions of each vertex multiplied with the corresponding vertex bone-weight? (weight = 0 for no weight of a bone)

We need to get this definition straight so that the mathematics can be correctly applied in the vertex shader!

Edited January 18, 2022 by The_GTA

[long_gone]

3 hours ago, The_GTA said:

I am interested in the mathematics behind ped "skinning". I know that a ped skin is defined as a map, where vertices are keys and a set of bones with a weight-number are the values. From what I'd imagine the weight-number should be a value between 0..1, the sum of all the weight-numbers for a single vertex should equal 1. So is my assumption correct that the skinned position of each vertex is the sum of all relative-to-bone positions of each vertex multiplied with the corresponding vertex bone-weight? (weight = 0 for no weight of a bone)

We need to get this definition straight so that the mathematics can be correctly applied in the vertex shader!

I don't really know how exactly define 'mathematics ' I want to perform, but 'aight , for instance , I want to 'expand' a pedestrian' neck. I'd appreciate any sample how to do that    

[Dutchman101]

I just uploaded a ped morphing resource that makes all players fat, you can check it out as example @long_gone

https://community.multitheftauto.com/?p=resources&s=details&id=18647

[long_gone]

1 hour ago, Dutchman101 said:

I just uploaded a ped morphing resource that makes all players fat, you can check it out as example @long_gone

https://community.multitheftauto.com/?p=resources&s=details&id=18647

Good example ty, but how can I actually perform shader on some particular body part?

[The_GTA]

13 minutes ago, long_gone said:

Good example ty, but how can I actually perform shader on some particular body part?

You could try modifying the vertex diffuse colors of the ped model so that you embed a "morph weight" for each vertex into the alpha channel. This would require modification of the ped model file. I am not sure how RenderWare does treat those ped colors. Then you can read the alpha channel value in the morph vertex shader. If the alpha channel is zero, then no morphing is performed on the vertex. Otherwise you can scale the morphing by ( alpha * GLOBAL_MORPH_SCALE ) where alpha is color value inside of the shader ranging from 0 (no opacity) to 1 (full opacity).

Try setting the alpha channel values for body parts that you do not want to be morphed to zero. Then apply a non-zero alpha channel value to body part vertices that you do want morphed.

Inside of the shader pass 1 as real alpha value to the pixel shader. I don't think that peds use alpha values in vertex colors anyway.

Edited January 18, 2022 by The_GTA