Ramp between Y Max and Min object

[Tasbien]

Hi,

 

In geo Cristal, in network BiblioShaders, in classicshader_Exter :

I wish to control with a ramp gradient or float the parameter Subsurface_intensity between Ymin and max of my cristal.

Anyone have any ideas, please ?

 

Many thanks

CrystalBall_02.hiplc

[Jesper Rahlff]

here is a way of creating a ramp to use for your sss.

I disabled refraction, sss, etc and only kept diffuse, but plugged the ramp into the diffuse as it was faster to render.

I have done the calculations on sop level in a point wrangle, but you could just as easily do it in the shader instead by referencing a sop by the op: syntax.

hope this helps

CrystalBall_Ramp.hiplc

[Tasbien]

Hi Jesper,

Thank you very much

It helps me understand better how to do that. In your example, can't control ramp values, can you explain how to do that ?

Have a nice day

 

[tamagochy]

you can create ramp in sop level and use in shader

pointwrangle

vector bbx = relbbox(0,@P);
f@ramp = chramp("ramp",bbx.y);

 

[Jesper Rahlff]

On 2018-08-02 at 1:49 AM, Tasbien said:

Hi Jesper,

Thank you very much

It helps me understand better how to do that. In your example, can't control ramp values, can you explain how to do that ?

Have a nice day

 

if you scroll down on the pointwrangle there is a ramp parameter visible. You probably want to change that to a grayscale color.

[Tasbien]

Hi,

Thank you for tamagochy and Jesper for your explanations.

To clarify my need,
I wish to make a gradient ramp with one or several cursors to adjust the gradient as I wish it to make several different crystals.

For the moment because I'm noob and "more visual graphist" , I prefer doing that with pointvop and sop that with vex in point wrangle but that help me to understand what i do that.

I try to doing that and your assistant is welcome

I go on holiday for August, I give news of my progress in my return.

Thank you very much in any case and nice