Randomize (vertices) #38317

New Issue

Campbell Barton · 2014-01-22T14:35:13+01:00

Campbell Barton commented

2014-01-22 14:35:13 +01:00

This would be a simple tool to randomize all points in a mesh/lattice/armature/curves/metaballs even.

Using ED_transverts.h API this can be written once and used for for different object types. (See how warp and snap use ED_transverts_create_from_obedit and related functions).

This would be a simple tool to randomize all points in a mesh/lattice/armature/curves/metaballs even. Using `ED_transverts.h` API this can be written once and used for for different object types. (See how warp and snap use `ED_transverts_create_from_obedit` and related functions).

Campbell Barton commented

2014-01-22 14:35:13 +01:00

Changed status to: 'Open'

Campbell Barton commented

2014-01-22 14:35:13 +01:00

Added subscriber: @ideasman42

Marcelo Varanda commented

2014-01-22 19:24:56 +01:00

Added subscriber: @MarceloVaranda

Marcelo Varanda commented

2014-01-23 04:05:31 +01:00

A few questions:
1- Is it desired to have UI controls added into Property panel for each type of object or the idea is just to expose API and either an Addon or a script would call it?
2- As those object changes on the fly while in edit mode is it desired to randomize while being dynamically updated? It maybe confusing for the Artist as all vertices are changing position in areas not being modified; or lets only apply randomization when leaving edit-mode or by an function call?
3- any preference where to implement the wrappers for setting up the parameters (amplitude, frequency etc)?

A few questions: 1- Is it desired to have UI controls added into Property panel for each type of object or the idea is just to expose API and either an Addon or a script would call it? 2- As those object changes on the fly while in edit mode is it desired to randomize while being dynamically updated? It maybe confusing for the Artist as all vertices are changing position in areas not being modified; or lets only apply randomization when leaving edit-mode or by an function call? 3- any preference where to implement the wrappers for setting up the parameters (amplitude, frequency etc)?

Campbell Barton commented

2014-01-23 05:03:41 +01:00

yes (but this is automatic), 2) not sure what you mean. 3) think this can wait - as in, first get basics working, eventually it could be good to have some more options.

Check object_warp.c

1) yes (but this is automatic), 2) not sure what you mean. 3) think this can wait - as in, first get basics working, eventually it could be good to have some more options. Check object_warp.c

Marcelo Varanda commented

2014-01-25 22:10:59 +01:00

Posting a patch with a simple implementation that randomize vertices.
Still need work.

Posting a patch with a simple implementation that randomize vertices. Still need work.

Marcelo Varanda commented

2014-01-25 22:26:27 +01:00

The sample code that I have attached moves vertices to/from the object center (maybe acceptable for rounded objects).
I guess it would be better moving along the vertices's normal but I did not dig enough to find where the normals are stored or calculated.

The sample code that I have attached moves vertices to/from the object center (maybe acceptable for rounded objects). I guess it would be better moving along the vertices's normal but I did not dig enough to find where the normals are stored or calculated.

Marcelo Varanda was assigned by Kévin Dietrich

2014-01-28 16:56:03 +01:00

Kévin Dietrich commented

2014-01-28 16:56:03 +01:00

Added subscriber: @kevindietrich

Kévin Dietrich commented

2014-01-28 16:56:03 +01:00

You should at least claim the task if/when you're working on it. Just sayin'.

Marcelo Varanda commented

2014-01-28 17:11:56 +01:00

I am still getting familiar with everything related to this project. This saturday was my very first day working with Blender.
The claiming/assigning operation does not show up in the task's right panel... it is not obvious that we need to "Edit" the task to assign it. Thanks for the tip anyways.

I am still getting familiar with everything related to this project. This saturday was my very first day working with Blender. The claiming/assigning operation does not show up in the task's right panel... it is not obvious that we need to "Edit" the task to assign it. Thanks for the tip anyways.

Campbell Barton commented

2014-01-28 18:19:51 +01:00

Hi, some feedback on the patch,

First of all, I think randomizing around a central point is a bit strange. Probably best to just randomize each point in 3d space (move each vertex a random direction).

Also, randomizing in screen-space seems a bit unnecessary (I know warp does this, but its a special case - warp needs to be done in screen-space).

However it may be good to be able to constrain randomization, for example, randomized displacement along the vertex normal would be handy (like a noisy displacement).

Hi, some feedback on the patch, First of all, I think randomizing around a central point is a bit strange. Probably best to just randomize each point in 3d space (move each vertex a random direction). Also, randomizing in screen-space seems a bit unnecessary (I know warp does this, but its a special case - warp needs to be done in screen-space). However it may be good to be able to constrain randomization, for example, randomized displacement along the vertex normal would be handy (like a noisy displacement).

Marcelo Varanda commented

2014-02-01 02:40:04 +01:00

Thanks Campbell, I will try to make progress on this task tomorrow. Is the place in the UI acceptable?
I am placing it in Mesh->Transform->Randomize

Thanks

Thanks Campbell, I will try to make progress on this task tomorrow. Is the place in the UI acceptable? I am placing it in Mesh->Transform->Randomize Thanks

Marcelo Varanda removed their assignment 2014-02-01 17:00:54 +01:00

Marcelo Varanda commented

2014-02-01 17:00:54 +01:00

Assigning to nobody as I may be too slow to complete this task.
I tried a couple things today but I went no where.

It looks like that it would make more sense to implement the desired code under mesh editor area if the operation should be performed over the object space.
ex: in a "editmesh_tools.c" like file having a function like "edbm_do_randomize_vertex_exec(...) "
However, it will be restricted to meshes and the suggestion was to apply to many object types

Anyways... if anyone else wants to help in implementing this task then please be welcome.

Assigning to nobody as I may be too slow to complete this task. I tried a couple things today but I went no where. It looks like that it would make more sense to implement the desired code under mesh editor area if the operation should be performed over the object space. ex: in a "editmesh_tools.c" like file having a function like "edbm_do_randomize_vertex_exec(...) " However, it will be restricted to meshes and the suggestion was to apply to many object types Anyways... if anyone else wants to help in implementing this task then please be welcome.

Steve commented

2014-02-09 20:06:04 +01:00

Added subscriber: @Cruentus_Nex

Steve self-assigned this 2014-02-09 20:10:05 +01:00

Patrice Bertrand commented

2014-03-07 15:47:13 +01:00

Added subscriber: @PatriceBertrand