Hi Guys,
Ari, if I follow you correctly you can use a combination of a
ParticleDrag node and a ParticleExpression node (to change the channel
the particles are in at a particular frame), then apply the forces to
that channel downstream to get what you are after.
Have a look at this example Nuke 6.3v7 script. Is that what you want?
Cheers,
Sean
Moritz Moeller wrote:
On 5/17/2012 1:20 PM, Diogo Girondi wrote:
A "hold" node for particles would be great.
Can't a particle expression be used to set velocity to zero?
.mm
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#! ./Nuke6.3v7 -nx
version 6.3 v7
define_window_layout_xml {<?xml version="1.0" encoding="UTF-8"?>
<layout version="1.0">
<window x="0" y="0" w="1680" h="1050" fullscreen="1" screen="0">
<splitter orientation="1">
<split size="1154"/>
<splitter orientation="1">
<split size="40"/>
<dock id="" hideTitles="1" activePageId="Toolbar.1">
<page id="Toolbar.1"/>
</dock>
<split size="1110"/>
<splitter orientation="2">
<split size="637"/>
<dock id="" hideTitles="1" activePageId="Viewer.1">
<page id="Viewer.1"/>
</dock>
<split size="409"/>
<dock id="" activePageId="DAG.1">
<page id="DAG.1"/>
<page id="Curve Editor.1"/>
<page id="DopeSheet.1"/>
</dock>
</splitter>
</splitter>
<split size="522"/>
<dock id="" activePageId="Properties.1">
<page id="Properties.1"/>
<page id="Error Console.1"/>
</dock>
</splitter>
</window>
</layout>
}
Root {
inputs 0
name
/mnt/nethome/users/sean/Desktop/freeze_sim_then_apply_force_example_n63v7.nk
project_directory "\[python \{nuke.script_directory()\}]"
lock_range true
format "2048 1556 0 0 2048 1556 1 2K_Super_35(full-ap)"
proxy_type scale
proxy_format "1024 778 0 0 1024 778 1 1K_Super_35(full-ap)"
}
Constant {
inputs 0
channels rgb
format "256 256 0 0 256 256 1 square_256"
name Constant1
xpos 397
ypos -447
}
Radial {
area {1 6 255 250}
color {0.8199999928 0.4985600412 0.01639998332 1}
name Radial1
xpos 397
ypos -375
}
Sphere {
inputs 0
name Sphere1
xpos 630
ypos -382
}
push 0
ParticleEmitter {
inputs 3
emit_from faces
rate {{frame==0?100:0}}
lifetime 100
velocity 0.02
color_from_texture true
name ParticleEmitter1
xpos 518
ypos -375
}
ParticleDrag {
drag {{frame<20?0:5}}
channels {a}
name ParticleDrag1
xpos 518
ypos -312
}
ParticleExpression {
channelsexpr frame==20
channels {a}
name ParticleExpression1
xpos 518
ypos -278
}
ParticleGravity {
channels {b}
name ParticleGravity1
xpos 518
ypos -244
}
Viewer {
frame 1
frame_range 1-100
frame_range_lock true
input_process false
grid_display false
name Viewer1
xpos 518
ypos -185
}
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