Particles Flip / Cross when Follow a Curve Guide #38621

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filip mond · 2014-02-13T13:43:59+01:00

filip mond commented

2014-02-13 13:43:59 +01:00

System Information
OSX 10.8.5, NVIDIA GeForce GTX 780M 4096 MB

Blender Version
Broken: 2.69.0 r60991

Short description of error
Particles - flips over a curve when they gets into a control point with the same axis as first control point of curve.

See .blend file
Problem visible with 3D type of curve only - 2D works OK. 3D curve works since some control point gets "Z" value (curve become real 3D). Seems like it depending on a first control point orientation (I'm not sure what is the rule).

Layer 1

First control point in X axis - Particles Fliping - Top/Bottom
Layer 2
First control point in Y axis - Particles Crossing - Left/Right
test-Particles-Flip-Cross.blend

(Another example…test-Particles-FieldCurve-3x.blend)

I found some reported bugs or todo with rotation problem, but no one was related to "Curve Guide".
If there is any sorry I didn't found it.

Is there a energy to fix it? Thank you

**System Information** OSX 10.8.5, NVIDIA GeForce GTX 780M 4096 MB **Blender Version** Broken: 2.69.0 r60991 **Short description of error** Particles - flips over a curve when they gets into a control point with the same axis as first control point of curve. **See .blend file** Problem visible with 3D type of curve only - 2D works OK. 3D curve works since some control point gets "Z" value (curve become real 3D). Seems like it depending on a first control point orientation (I'm not sure what is the rule). Layer 1 - First control point in X axis - Particles Fliping - Top/Bottom Layer 2 - First control point in Y axis - Particles Crossing - Left/Right [test-Particles-Flip-Cross.blend](https://archive.blender.org/developer/F77132/test-Particles-Flip-Cross.blend) (Another example…[test-Particles-FieldCurve-3x.blend](https://archive.blender.org/developer/F77134/test-Particles-FieldCurve-3x.blend)) I found some reported bugs or todo with rotation problem, but no one was related to "Curve Guide". If there is any sorry I didn't found it. Is there a energy to fix it? Thank you

filip mond commented

2014-02-13 13:43:59 +01:00

Changed status to: 'Open'

filip mond commented

2014-02-13 13:43:59 +01:00

Added subscriber: @FilipMond

Lukas Tönne commented

2014-02-14 15:38:49 +01:00

Added subscriber: @LukasTonne

Lukas Tönne commented

2014-02-14 15:38:49 +01:00

Yet another case of particle rotation issues ...

It looks like this problem is caused by extra offset treatment in the particle do_guides function:
https://developer.blender.org/diffusion/B/browse/master/source/blender/blenkernel/intern/particle.c;e1d9308616b00ebe350056258f56fe2775a085ed$2173

This code is supposed to rotate the initial offset of particles or so, but ends up influencing the rotation as well (without that the rotation correctly follows the curve, but then the offset doesn't rotate with it).

Yet another case of particle rotation issues ... It looks like this problem is caused by extra offset treatment in the particle do_guides function: https://developer.blender.org/diffusion/B/browse/master/source/blender/blenkernel/intern/particle.c;e1d9308616b00ebe350056258f56fe2775a085ed$2173 This code is supposed to rotate the initial offset of particles or so, but ends up influencing the rotation as well (without that the rotation correctly follows the curve, but then the offset doesn't rotate with it).

Sergey Sharybin commented

2014-02-17 09:42:08 +01:00

Changed status from 'Open' to: 'Duplicate'

Sergey Sharybin closed this issue

2014-02-17 09:42:08 +01:00

Sergey Sharybin commented

2014-02-17 09:42:08 +01:00

✘ Merged into #32340.

Sergey Sharybin commented

2014-02-17 09:43:09 +01:00

Added subscriber: @Sergey

Sergey Sharybin commented

2014-02-17 09:43:09 +01:00

This is an old TODO with particle rotation. Area needs love really and it's kinda orphaned atm..

Moving to our TODO list so it'll be handles as soon as some cool guy starts working in that area. Thanks for the report anyway! :)

This is an old TODO with particle rotation. Area needs love really and it's kinda orphaned atm.. Moving to our TODO list so it'll be handles as soon as some cool guy starts working in that area. Thanks for the report anyway! :)

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Particles Flip / Cross when Follow a Curve Guide #38621