vex [VEX] Stacking points one above the other using atrrib size

[esnaacho]

Hello wizards, i have a little problem, and im not able to understand why my code doesnt work.

I have:

-a couple of points,

-each with a vector attrib "size".

-some code in a wrangle to order the points one above/under(direction shouldnt matter because im taking the absolut value, right?) the other without modifying the first point (0):

if(@ptnum > 0){
    vector last_point_size = point(0, "size", @ptnum-1);
    vector last_point_pos = point(0, "P", @ptnum-1);
    @P.y += ( abs(last_point_size[1]) + abs(last_point_pos[1]) );
}

Here before/after the wrangle. Tint in blue everything that doesnt change.

What am i doing wrong?

Thanks in advance for your time.

[fencer]

How about calculate real size of every letter and shift based on it? Looks like you are trying to do the same but I am not sure about your idea.

ltower_v01.hipnc

Edited June 11, 2020 by fencer

[Noobini]

I'm not really contributing anything but just FYI there's Labs Align and distribute which does in all 3 axis (with spacing)...just in case you wanna dissect its innards.

[esnaacho]

1 hour ago, fencer said:

How about calculate real size of every letter and shift based on it? Looks like you are trying to do the same but I am not sure about you idea.

ltower_v01.hipnc

Thank you . i would look into it.

1 hour ago, Noobini said:

I'm not really contributing anything but just FYI there's Labs Align and distribute which does in all 3 axis (with spacing)...just in case you wanna dissect its innards.

thanks man! i was looking for that, i saw it in a video a long time ago, but i couldnt remember the node name, and i dont remember the video either. lool thanks !


I think i found out the problem.
In the loop inside the wrangle:

if(@ptnum > 0){
    vector last_point_size = point(0, "size", @ptnum-1);
    vector last_point_pos = point(0, "P", @ptnum-1);
    @P.y += ( abs(last_point_size[1]) + abs(last_point_pos[1]) );
}

when its in Point(0) - nothing happen

when its in Point(1) - last_point_pos = Point(0)'s position. apply new pos. OK

but when its in Point(2) - last_point_pos = Point(1) without the previous modification, so point 1 and 2 end up overlapping.

 

:/

 

[esnaacho]

2 hours ago, fencer said:

How about calculate real size of every letter and shift based on it? Looks like you are trying to do the same but I am not sure about you idea.

ltower_v01.hipnc

 

finally, problem solved. With just one wrangle. Your hip file was very useful. thanks !

I had to calculate the total size of all previous points, then adding the current size. 

float total;
for(int i=0;i<@ptnum;i++){
    vector last_point_size = point( 0, "size", i );
    total += last_point_size[1];
}
@P.y = ( total + ( v@size[1]/2) );

 

Thanks everyone

Edited June 11, 2020 by esnaacho
changed variable name for easy understanding