OK so this may be a silly question. I've been away from Houdini for a while and this is something I always used to do using a Point SOP as it was just easier, but as H is moving towards VEX more a lot more nodes, i'd like to do the same.
Say I had a line with a number of points, normally I would drop a POINT SOP, Add Color and just use
1-$PT/$NPT in R, G or B and this would give me a nice ramp from Red to Black. How do I achieve this in an new Attribute Expression node?
How to color points along with new Point SOP
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- Josh Oram
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- tamte
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to get really full 1-0 ramp on sequentially ordered curve it'd have to be 1-$PT/($NPT-1)
which in the new Point SOP will be
if however your curve has scrambled point order or you have multiple curves in the input and you want 1-0 ramp on each of them then you can use
EDIT:
and if the real question was how to do that only for one of the channels, then you can for example do:
which in the new Point SOP will be
1.0-@ptnum/(@numpt-1.0)
1.0-vertexprimindex(0,@vtxnum)/(primvertexcount(0,@primnum)-1.0)
EDIT:
and if the real question was how to do that only for one of the channels, then you can for example do:
{1,0,0}*(1.0-@ptnum/(@numpt-1.0)) // to set just x and clear y and z //or set(1.0-@ptnum/(@numpt-1.0), 0, 0) // the same //or set(1.0-@ptnum/(@numpt-1.0), self.y, self.z) // to set just x, but keep y and z from input or at default values //etc...
Edited by tamte - Oct. 12, 2017 11:02:12
Tomas Slancik
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Method Studios, NY
FX Supervisor
Method Studios, NY
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- Josh Oram
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