Hmmm ok
No there were hundreds - I left it 5 mins with no sign of progress.
FBX seemed quick but nothing in it
I'll have a play with a simple set up and see - 6.3v6 windoze
Howard
>________________________________
> From: Jerry Huxtable <[email protected]>
>To: Howard Jones <[email protected]>; Nuke user discussion
><[email protected]>
>Sent: Thursday, 26 April 2012, 8:10
>Subject: Re: [Nuke-users] fading in particles
>
>
>Hi,
>
>
>Hmmm….. It seems to work for me with a simple example (script at the end of
>this message). I get this obj file:
>
>
>## OBJ file generated by Nuke ##
>
>
># vertex list - offset=0
>v -0.200000 0.200000 -6.500000
>v 0.100000 -5.500000 0.000000
>v 0.400000 0.000000 -4.500000
>v -0.400000 0.100000 3.500000
>v 2.500000 0.400000 -0.200000
>v 0.400000 1.500000 0.000000
>v -0.100000 10.500000 0.100000
>v 9.500000 0.200000 0.500000
>v 0.300000 -8.500000 -0.100000
>v 0.500000 7.500000 -0.200000
>
>
>
>
># end of file
>
>
>Could it be that there just aren't any particles emitted yet at the frame
>you're rendering?
>
>
>Jerry
>
>On 25 Apr 2012, at 21:18, Howard Jones wrote:
>
>Thanks Guys
>>
>>
>>Wouldn't have figured that one out!
>>
>>
>>One other question - I added a ParticleToGeo node and after the scene added a
>>writeGeo.
>>
>>
>>With both obj and fbx and set on geo - I couldn't get anything written out
>>from the writeGeo that is the file seemed blank - any tricks here or a bug?
>>
>>
>>Thanks again
>>
>>Howard
>>
>>
>>
>>>________________________________
>>> From: Jerry Huxtable <[email protected]>
>>>To: Howard Jones <[email protected]>; Nuke user discussion
>>><[email protected]>
>>>Sent: Wednesday, 25 April 2012, 21:00
>>>Subject: Re: [Nuke-users] fading in particles
>>>
>>>
>>>Hi,
>>>
>>>
>>>ParticleCurve on the alpha should work, or a ParticleExpression. You
>>>probably need to add a BlendMat node in between your material and the
>>>ParticleEmitter and set "surface blend" to "modulate" in order to get the
>>>alpha to apply. As an example:
>>>
>>>
>>>set cut_paste_input [stack 0]
>>>version 6.3 v3
>>>ColorWheel {
>>> inputs 0
>>> gamma 0.45
>>> name ColorWheel1
>>> selected true
>>> xpos -291
>>> ypos -223
>>>}
>>>BlendMat {
>>> surfaceblend modulate
>>> name BlendMat1
>>> selected true
>>> xpos -181
>>> ypos -199
>>>}
>>>push $cut_paste_input
>>>Cube {
>>> name Cube1
>>> selected true
>>> xpos 84
>>> ypos -199
>>>}
>>>push 0
>>>ParticleEmitter {
>>> inputs 3
>>> rate 1
>>> color {1 1 1 1}
>>> name ParticleEmitter1
>>> selected true
>>> xpos -41
>>> ypos -199
>>>}
>>>ParticleCurve {
>>> curves {r {}
>>> g {}
>>> b {}
>>> a {curve l 0.2017413378 0.01293540001}
>>> size {}
>>> mass {}}
>>> name ParticleCurve1
>>> selected true
>>> xpos -41
>>> ypos -175
>>>}
>>>Viewer {
>>> frame 87
>>> input_process false
>>> name Viewer1
>>> selected true
>>> xpos -41
>>> ypos -71
>>>}
>>>
>>>
>>>
>>>
>>>Jerry
>>>
>>>
>>>
>>>On 25 Apr 2012, at 20:02, Howard Jones wrote:
>>>
>>>Hi
>>>>
>>>>
>>>>Is there a way to fade in and out particles. At the moment they are popping
>>>>on and off and I'd like a fade - I tried a ParticleCurve but that doesn't
>>>>appear to work.
>>>>
>>>>
>>>>All help appreciated
>>>>
>>>>
>>>>Thanks
>>>>
>>>>Howard
>>>>_______________________________________________
>>>>Nuke-users mailing list
>>>>[email protected], http://forums.thefoundry.co.uk/
>>>>http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users
>>>
>>>Jerry Huxtable,
>>>Senior Product DesignerThe Foundry
>>>Tel: +44 (0)20 7968 6828 - Fax: +44 (0)20 7930 8906 Web: www.thefoundry.co.uk
>>>Email: [email protected]
>>>
>>>The Foundry Visionmongers Ltd.
>>>Registered in England and Wales No: 4642027
>>>
>>>
>>>
>>>_______________________________________________
>>Nuke-users mailing list
>>[email protected], http://forums.thefoundry.co.uk/
>>http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users
>
>Jerry Huxtable,
>Senior Product DesignerThe Foundry
>Tel: +44 (0)20 7968 6828 - Fax: +44 (0)20 7930 8906 Web: www.thefoundry.co.uk
>Email: [email protected]
>
>The Foundry Visionmongers Ltd.
>Registered in England and Wales No: 4642027
>
>
>WriteGeo example:
>
>
>set cut_paste_input [stack 0]
>version 6.3 v3
>ColorWheel {
> inputs 0
> gamma 0.45
> name ColorWheel1
> selected true
> xpos -372
> ypos -16
>}
>BlendMat {
> surfaceblend modulate
> name BlendMat1
> selected true
> xpos -262
> ypos 8
>}
>push $cut_paste_input
>Cube {
> name Cube1
> selected true
> xpos 3
> ypos 8
>}
>push 0
>ParticleEmitter {
> inputs 3
> rate 1
> color {1 1 1 1}
> name ParticleEmitter1
> selected true
> xpos -122
> ypos 8
>}
>ParticleCurve {
> curves {r {}
> g {}
> b {}
> a {curve l 0.2017413378 0.01293540001}
> size {}
> mass {}}
> name ParticleCurve1
> selected true
> xpos -122
> ypos 32
>}
>ParticleToGeo {
> name ParticleToGeo1
> selected true
> xpos -122
> ypos 66
>}
>WriteGeo {
> file /tmp/foo.obj
> file_type obj
> name WriteGeo1
> selected true
> xpos 3
> ypos 66
>}
>
>
>
>_______________________________________________
Nuke-users mailing list
[email protected], http://forums.thefoundry.co.uk/
http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users
