Mantra rendering

[yujiyuji]

I have now created something like the image attached here.
Now all the lines are glowing.
Is it possible to make only certain places glow with noise in the rendering just using Mantra?
Other places are fine to leave dark lines.

Someone please advise.

[Librarian]

@yujiyuji You can Use alpha Like Mask for Glowing in this Case Brightness  .Maybe it Helps it have Potential +plus you have endless control with wire and points in the code
 

v@Cd = {1,1,1};
@pscale = 0.0007;

___________________________-------_____________________________
if (chs("parm_cam_obj")=="") {
    error("Need a camera object!");
}

     
if (!haspointattrib(0, "pscale")) {
    @pscale = 1.0;
}

if (!haspointattrib(0, "Alpha")) {
    f@Alpha = 1.0;
}


f@pscale *= chf("parm_pre_scale");
vector camPos = cracktransform(0,0,0,{0,0,0},optransform(chs("parm_cam_obj")));

float resx = ch("`chs("parm_cam_obj")`/resx");
float focal = ch("`chs("parm_cam_obj")`/focal");
float filmwidth = ch("`chs("parm_cam_obj")`/aperture");

vector myP = ptransform("space:object","space:world",@P);
float dist_to_cam = abs(length(myP-camPos));
float pixelSize;
if (chi("parm_use_dome_projection")) {  


    pixelSize = (atan(2*@pscale / dist_to_cam) * (resx/2.0));

} else {

    
    pixelSize = ((2*@pscale / dist_to_cam) * ((resx * focal) / filmwidth));

}


if ((pixelSize == 0.0) || (@Alpha == 0.0)) {


    @Alpha = 0.0;
    
} else {
    
    
    float multFac = chf("parm_min_pixels")/pixelSize;

    
    if (chi("parm_visualise")) {
    
        @Cd = {0,1,0};
    
        if (pixelSize < chf("parm_min_pixels")) {
            @Cd = {1,0,0};
        }    
    
    } else {


        if (pixelSize < chf("parm_min_pixels")) {
            
      
        
            @pscale *= multFac;

            if (chi("parm_col_not_alpha")) {
                @Cd /= chi("parm_wires") ? multFac : pow(multFac,2);
            } else {
                @Alpha /= chi("parm_wires") ? multFac : pow(multFac,2);
            }                
        
        } else {
        
    
        
            if (chi("parm_brighten_near_ones")) {
            
             
            
               @pscale *= multFac;
                
                @Cd /= chi("parm_wires") ? multFac : pow(multFac,2);    
                
            }
        }
    }
}
    

 

Edited November 22, 2020 by Librarian

[konstantin magnus]

You could simply bind export color-ramped noise as color emission (Ce).

glow_lines.hipnc

[yujiyuji]

＠Librarian

Thank you so much!!

Do you main if I ask you to give me sample hipfile??

[yujiyuji]

59 minutes ago, konstantin magnus said:

You could simply bind export color-ramped noise as color emission (Ce).

glow_lines.hipnc

Wow！

I's really easy to understand!!

Thank you!!

[Librarian]

@yujiyuji I use Abs Everything From this Topic and  1 exampel  just copy paste code into att wrangle. and Have Some Camera in you Scene.Have Fun Combine Stuff