craboom | SideFX

Select Point A, select another point, PontB above Point A. If no point found, select another PointA and repeat 2019年9月6日4:58

I´ve talked to a programmer who´s not familiar with houdini but with C. He gave me a possible solution.

My question here is, is it nessecary that i have to create a random algorythm for this particluar thing or is there an even better / easier approach?

Here´s what he made for me:

int pts[];
vector posi[];
int takenPositions[];
int height;
vector pos;
float seed;
int findTopPoint;

@rand;

/////////////////////

pts = expandpointgroup(0, "*");
pos = point(0, "P", @ptnum);
height = chi("height")-1;
findTopPoint = 0;


// random algorythm
seed = ch("seed");
@rand = floor(rand(seed)*@numpt);
if(@ptnum > 10){
    while(@rand < @ptnum && find(takenPositions, @rand)<0){
     
         push(takenPositions, @rand);
         seed +=1;
         @rand = floor(rand(seed)*@numpt);
    }
}
if(@ptnum == @rand){
    findTopPoint = 1;
}


// select point > y
float range = 0.001;
if(findTopPoint == 1){
    foreach(int pt; pts) {
        vector currentPos = point(0,"P", pt);
        if(
        currentPos.x <= @P.x + range && 
        currentPos.x >= @P.x - range &&
        currentPos.z <= @P.z + range &&
        currentPos.z >= @P.z - range &&
        currentPos.y > @P.y &&
        point(0,"selected", @ptnum) != 1
        ) {
            setpointattrib(0, "selected", pt, 1, "set");
            @selected = 1;
            height--;
            if(height<=0){
            break;
            }
        }
    }
}

I know this is not the best solution but it works and i have to figure out whatßs going on here and honestly, i also have to figure out how i can approach this, cause, like i said, i´m very new to coding, but i´m happy that i have something to work with

Still wondering if it´s the correct way doing it, thought there would be a nicer / easier solution

André Graf

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