Particle Birth Error #40815

New Issue

Atomic · 2014-06-26T20:06:54+02:00

Atomic commented

2014-06-26 20:06:54 +02:00

System Information
OSX 10.9.1 Intel HD4000

Blender Version
Broken: 2.71 official
Worked: I would guess around 2.67 this feature did work.

Short description of error
When particles Start and End are set to frame #1 rewind or frame change does not make them appear in the scene.

Exact steps for others to reproduce the error
The Attached BLEND file is setup to demonstrate the error.
Open the BLEND and press play. Particles will start to appear around the sphere.
But wait a second...
Examine the particle Start and End frame. They are both set to frame 1.0.
All the particles should appear on frame #1 or at least when the frame changes, not slowly appear over time as you will see when you press play in the file.

NOTE: If I type a new count in the Numberfield of the particle system and press rewind all the particles pop into existence as they should have when the frame changed on the first play.

particle_birth_error.blend

**System Information** OSX 10.9.1 Intel HD4000 **Blender Version** Broken: 2.71 official Worked: I would guess around 2.67 this feature did work. **Short description of error** When particles Start and End are set to frame #1 rewind or frame change does not make them appear in the scene. **Exact steps for others to reproduce the error** The Attached BLEND file is setup to demonstrate the error. Open the BLEND and press play. Particles will start to appear around the sphere. But wait a second... Examine the particle Start and End frame. They are both set to frame 1.0. All the particles should appear on frame #1 or at least when the frame changes, not slowly appear over time as you will see when you press play in the file. NOTE: If I type a new count in the *Number*field of the particle system and press rewind all the particles pop into existence as they should have when the frame changed on the first play. [particle_birth_error.blend](https://archive.blender.org/developer/F95654/particle_birth_error.blend)

Atomic commented

2014-06-26 20:06:54 +02:00

Changed status to: 'Open'

Atomic commented

2014-06-26 20:06:54 +02:00

Added subscriber: @AtomP

NikoLeopold commented

2014-06-27 15:59:33 +02:00

Added subscriber: @NikoLeopold

NikoLeopold commented

2014-06-27 15:59:33 +02:00

i dont have much experience with the particle system, but i tried it (Ubuntu 2.71 build) and the particles generally appear in the right timeframe, however sometimes it doesnt update the settings and still shows old (probably cached information). if i had a start-end timeframe of 1-100 and change it to 1-1 then it sometimes doesnt update and still show the old information.

could you try changing some values (for instance seed) just to see if it updates and behaves correctly?
also from your note it really seems like a caching issue.

i dont have much experience with the particle system, but i tried it (Ubuntu 2.71 build) and the particles generally appear in the right timeframe, however sometimes it doesnt update the settings and still shows old (probably cached information). if i had a start-end timeframe of 1-100 and change it to 1-1 then it sometimes doesnt update and still show the old information. could you try changing some values (for instance seed) just to see if it updates and behaves correctly? also from your note it really seems like a caching issue.

Lukas Tönne was assigned by Sergey Sharybin

2014-07-01 19:56:44 +02:00

Sergey Sharybin commented

2014-07-01 19:56:44 +02:00

Added subscriber: @Sergey

Sergey Sharybin commented

2014-07-01 19:56:44 +02:00

in 2.67 indeed tweaking start/end frame (to force particles to refresh) makes things working as expected. Mind having a bit of investigation? Should be rather simple to bisect.

NikoLeopold commented

2014-07-01 21:03:58 +02:00

id love to look into this to learn, but have a final math exam on friday ;)
so i guess it will be fixed until then, otherwise ill try to fix it as my first bug fix ever (if i even manage to) after friday.

of course, please dont wait for me if you have time and want to do that ;)

id love to look into this to learn, but have a final math exam on friday ;) so i guess it will be fixed until then, otherwise ill try to fix it as my first bug fix ever (if i even manage to) after friday. of course, please dont wait for me if you have time and want to do that ;)

Lukas Tönne commented

2014-07-02 11:46:34 +02:00

Broken by 78c491e62a

Broken by 78c491e62a

blender-admin commented

2014-07-02 12:20:51 +02:00

This issue was referenced by 259a436197

This issue was referenced by 259a4361973c7e1b912b9fcded3ed02bf9ab0b96

Lukas Tönne commented

2014-07-02 12:21:25 +02:00

Changed status from 'Open' to: 'Resolved'

Lukas Tönne closed this issue