color ramp

[roberttt]

Hi,

i forgot how to use ramp color based on point number. i want black to red from 0 to 10 and just black after 10.

 

[bunker]

attribwrangle:
@Cd=chramp("ramp",fit(@ptnum,0,npoints(0)-1,0,1));

or to set the colors directly:

vector red={1,0,0};
vector blue={0,0,1};
@Cd=lerp(red,blue,fit(@ptnum,0,npoints(0)-1,0,1));

Edited November 27, 2018 by bunker

[roberttt]

8 minutes ago, bunker said:

attribwrangle:
@Cd=chramp("ramp",fit(@ptnum,0,npoints(0)-1,0,1));

thanks bunker but it still doesn't work. i attached my hip file.

ramp.hiplc

[bunker]

you need to create the spare parameters 
 

[roberttt]

4 minutes ago, bunker said:

you need to create the spare parameters 
 

got it thanks