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Index › Programming Questions & Help › Syntax Questions › loop array

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loop array (Read 1269 times)

jirko Ex Member	loop array May 5^th, 2010, 1:52am hi, I'm working with the http://processing.org/learning/2darray/ example. How can I loop the rectangles I have tried with translate, but it moves all the cubes and don't loop them. Any help will be much appreciated. Cheers

PhiLho YaBB Moderator Offline Posts: 4190 Near Paris (France)	Re: loop array Reply #1 - May 5^th, 2010, 4:36am What do you call "loop the rectangles"? Making them to rotate? Displaying them in sequence?

jirko

Re: loop array
Reply #2 - May 5^th, 2010, 5:12am

Hi PhiLho,

displaying them in sequence is what I pretend. (I think, sorry I'm a noob)

Actually I'm moving the rectangles from left to right, but they disappear gradually and appear again once the last rectangle is out of the scene. But I want to repaint them on the left side.

Code:


void setup(){
  size(400,400);
}

int s = 40;
int f;

void draw(){
  movement();
  frameRate(30);
  background(255);
  for(int i=0; i<width; i++){
    if(i==width){i=0;}
    fill(random(125));
    rect(i*s+mov_fact, 150, s, s);}
    
}

float mov_fact;

void movement(){
  mov_fact = mov_fact + 10;
  if (mov_fact > width + s) {
    mov_fact = 0;
    }
}

thanks!

PhiLho YaBB Moderator Offline Posts: 4190 Near Paris (France)	Re: loop array Reply #3 - May 5^th, 2010, 7:06am Quote: `frameRate(30);` Better to move that to setup(). That's the default anyway. Quote: `if(i==width){i=0;}` Don't do that in a for loop! Quote: `if (mov_fact > width + s)` You probably want `if (mov_fact > width - s)`

PhiLho

Re: loop array
Reply #4 - May 5^th, 2010, 7:11am

Maybe you want to do something like this:
Code:

void setup(){
  size(400,400);
  frameRate(10);
}

int s = 40;
int boxNb = 7;
int f;

void draw(){
  movement();
  background(255);
  for(int i=0; i<boxNb; i++){
    fill(random(125));
    int pos = (i*(s + 5) + mov_fact) % (width - s);
    rect(pos, 150, s, s);
  }
}

int mov_fact;

void movement(){
  mov_fact += 10;
}

jirko

Re: loop array
Reply #5 - May 5^th, 2010, 11:27am

Thanks a lot for the example! This comes very close to what I pretend. Just one thing, why are the rectangles jumping into the scene? It's possible to make a smooth fade?

I have changed (width - s) to (width) and now they are fading on the right side, but they are still jumping on the left..

Code:

void setup(){
  size(400,400);
  frameRate(10);
}

int s = 40;
int boxNb = 2;
int f;

void draw(){
  movement();
  background(255);
  for(int i=0; i<boxNb; i++){
    fill(random(125));
    int pos = (i*(s + 5) + mov_fact) % (width);
    rect(pos, 150, s, s);
  }
}

int mov_fact;

void movement(){
  mov_fact += 10;
}

PhiLho

Re: loop array
Reply #6 - May 6^th, 2010, 1:21am

Code:

void setup() {
  size(400,400);
  frameRate(10);
}

int s = 40;
int boxNb = 7;
int f;

void draw() {
  movement();
  background(255);
  for(int i = 0; i < boxNb; i++) {
    fill(random(125));
    int pos = (i*(s + 5) + mov_fact) % (width + s) - s;
    rect(pos, 150, s, s);
  }
}

int mov_fact;

void movement() {
  mov_fact += 10;
}

jirko Ex Member	Re: loop array Reply #7 - May 6^th, 2010, 2:14am perfect! thanks a lot for your patience! cheers _J

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