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Any tips on Curve Guide and Particles ?? [Blender question]

jorge dorlandojorge dorlando Posts: 1,159
in The Commons

Hello people
My problem is as follows:
I want to use particles in 2 pipes ... In one pipe, the particles should go up ... In the other pipe, the other particles must go down ...
However, whenever I define the particles of one pipe, the particles of the second pipe obey the influence of the particles of the first pipe ... 2 pipes ... 2 particle configurations, but even if I have 2 guide curves, one for each, yet both particles are under the influence of only one curve guide ...
How could I do so that each particle recognizes and obeys only its curve guide only?
Thank you very much

Comments

  • andya_b341b7c5f5andya_b341b7c5f5 Posts: 694
    edited November 2019

    If I understand correctly what you want to do, in Blender 2.80 you need to put the two pairs of emitters and particle systems into two different collections, and then specify the relevant collection as the Effector Collection in the Field Weights section of the Particles tab.  As you seem to be using Blender 2.7x, you can probably achieve the same thing with layers, and Effector Groups, if my memory isn't failing me.

    In the attached image, the red plane and its particle system are in the collection named 'Collection', while the blue plane and its particle system are in the collection named 'Collection 2' (I know, imaginative eh?).  Then the Effector Weight is set to 'Collection', the Effector Weight for the blue system is set to 'Collection 2'.

    particles-2-curves.jpg
    1920 x 1024 - 555K
    Post edited by andya_b341b7c5f5 on
  • jorge dorlandojorge dorlando Posts: 1,159

    Hi,
    Well, I'm using Blender 2.79b.
    Sorry, but if I transfer an item to another layer, won't it be invisible on the main layer? (sorry for my ignorance).
    I've been thinking, "Maybe, instead of using guide curves ... And using rigid body? What would a setting look like to transform a rigid pipe so that particles can't pass through the pipe walls, and just flow inside it?
    I have tried this option too and the pipe even turns green, indicating that a physics has been applied, but the particle emitter does not respond after that and is stuck.

  • andya_b341b7c5f5andya_b341b7c5f5 Posts: 694

    You can have as many layers visible or invisible as you want, between 0 and 20 of course. 

    Putting the pairs of emitters and curves on different layers is just to separate them, otherwise as you have seen the particles don't 'know' which curve to follow.  There is no need to make any layers invisible (unless you want that).

  • jorge dorlandojorge dorlando Posts: 1,159
    andya_b341b7c5f5 said:

    You can have as many layers visible or invisible as you want, between 0 and 20 of course. 

    Putting the pairs of emitters and curves on different layers is just to separate them, otherwise as you have seen the particles don't 'know' which curve to follow.  There is no need to make any layers invisible (unless you want that).

    When I press "m" to send to another layer, it really is out of sight ... or I'm confused !!!

  • nicsttnicstt Posts: 11,715
    edited November 2019

    You need to select the layers you want to be visible.

    Not sure if i still have a version prior to 2.80 to screeny.

    If I remember correctly (muscle memory is funny like that), you hold shift down and click on the layers you need.

    I'd switch to 2.8; a couple of things I'm not keen on, but overall, it is still Blender and so very awesome.

    Post edited by nicstt on
  • andya_b341b7c5f5andya_b341b7c5f5 Posts: 694
    edited November 2019

    As nicstt suggests, select the layers you want to be visible in the Layer section of the Scene tab, with Shift + plus left or right click, whichever way you have it set up.  In the pics, the cube is on Layer 1, the sphere is on Layer 2.  With both layers 1 and 2 selected, both objects are visible in the viewport.  When you move an object to a layer that isn't selected, then it will disappear, which I guess is what you are doing.

    2.79 feels like hard work now!

    layer01.jpg
    1920 x 1024 - 275K
    layer02.jpg
    1920 x 1024 - 270K
    layers1+2.jpg
    1920 x 1024 - 282K
    Post edited by andya_b341b7c5f5 on
  • jorge dorlandojorge dorlando Posts: 1,159
    edited November 2019
    andya_b341b7c5f5 said:

    As nicstt suggests, select the layers you want to be visible in the Layer section of the Scene tab, with Shift + plus left or right click, whichever way you have it set up.  In the pics, the cube is on Layer 1, the sphere is on Layer 2.  With both layers 1 and 2 selected, both objects are visible in the viewport.  When you move an object to a layer that isn't selected, then it will disappear, which I guess is what you are doing.

    2.79 feels like hard work now!

    Wow!! It's hard to believe how easy this is after you understand the method !!!
    You really enlightened me !!!
    Many thanks to andya_b341b7c5f5 for showing me the way !!!

    Post edited by jorge dorlando on
  • jorge dorlandojorge dorlando Posts: 1,159
    nicstt said:

    You need to select the layers you want to be visible.

    Not sure if i still have a version prior to 2.80 to screeny.

    If I remember correctly (muscle memory is funny like that), you hold shift down and click on the layers you need.

    I'd switch to 2.8; a couple of things I'm not keen on, but overall, it is still Blender and so very awesome.

    And nicstt: "" hold shift down "", really does the job !!! I feel like, my eyes have been opened !!!
    Many thanks to all of you for your help

  • kawanguzi.pl_aa436d5b9akawanguzi.pl_aa436d5b9a Posts: 0

    Wow... this has saved me headache too. Thanks!

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