whats the correct way to asign Cd to an array?

[dyei nightmare]

i have this in a wrangle,  and i want to asign the Cd value only to the points returned by the point cloud,  what is the correct way to do it?  i have this atm,  but whats then the apropiate syntaxis to do it?

 

edit:  setpointattrib doesnt work in this case i dont know why...  it just assign Cd to everything

 

int hnd = pcopen(0, "P", @P, 1, 3);
int sourceGoals[];
int valor[];
vector valorcd = {1,0,0}; 

while(pciterate(hnd)){
        int sourceGoal;
        pcimport(hnd,"Pnum",sourceGoal);
        push(valor,sourceGoal);
        push(sourceGoals,sourceGoal);
             
 }
 
    foreach (int i; valor){
            @Cd = valorcd;
    }
 i[]@ptvalor = valor;
 

 

Edited August 19, 2017 by dyei nightmare

[jujoje]

Use pcfind and a foreach? So something like:

//Set color to black

@Cd = 0;

// Pc find
float radius = ch("radius");
int maxpoints = ch("max_points");


int pointcloud[] = pcfind(1, "P", @P, radius, maxpoints);

foreach( int point ; pointcloud){
    @Cd = {0,1,0} ;
}

I think that's what you were looking for...

pcfind_example.hiplc

[dyei nightmare]

 

thanks a lot,  whats the diference with pcopen? i dont see in reference which cases are better to use pcfind or pcopen

[jujoje]

From my understanding the Pc find is a convenient way to iterate over a point cloud; it returns an array of the points and then, typically, you run those points through a foreach. This is roughly equivalent to doing a pc open and using a while loop to iterate over the points. Which makes your code/vop network much shorter and cleaner  

 

[jujoje]

Also it takes point groups / expressions. E.g.:

// Set Cd
@Cd=0;

// pcfind
float radius = ch("radius");
int maxpoints = ch("max_points");

// Mask string
string mask = "@P[0]>0.5";

int pointcloud[] = pcfind(1, mask, "P",  @P, radius, maxpoints);

foreach( int point ; pointcloud){
    @Cd = {0,1,0} ;
}

Will only look at the points whose x position is greater than 0.5

pcfind_mask.hiplc

[dyei nightmare]

thanks a lot thats great,  is pcfind able to retrieve another channels besides  position?   if so, there is no need anymore to have pcopen     

[dyei nightmare]

this is weird,  i dont remember when i asked this,  but ive found that pcfind is a lot faster.