function that redo random for specific combination

maxarch

I don't know if it has a function for this. Similar to constrain() but the opposite , the number cannot go there.

int xImg= int(random (0, 8))*int(-144);  // grid X
int yImg=int(random (0, 6))*int(144);  // grid y
int sImg =int(random(1, 5))*int(72); // icon size

so I don't want to have those combinations (xImg,yImg) (4,1) (5,1)(6,1)(7,1)(8,1)

if (yImg==1 &&  xImg>=4 &&  xImg<=8){
redo random until the number is not == to (yImg==1 &&  xImg>=4 &&  xImg<=8)
}

thanks

GoToLoop

https://forum.Processing.org/two/discussions/tagged?Tag=do/while

maxarch

so if i understand it wil be something like that

int xImg
int yImg
int sImg

sImg =int(random(1, 5))*int(72); // icon size

do xImg= int(random (0, 8))*int(-144);  // grid X
do yImg=int(random (0, 6))*int(144);  // grid y
 while (yImg==1 &&  xImg>=4 &&  xImg<=8);

GoToLoop

Just by taking a quick glance on your code above, it's pretty obvious it won't compile!
It's a do...while pair, not just 1 single do. Please make an effort to have a compilable code to post.

GoToLoop

// forum.Processing.org/two/discussion/15723/
// function-that-redo-random-for-specific-combination

// GoToLoop (2016-Mar-29)

int x, y;

void setup() {
  noLoop();
}

void draw() {
  background((color)random(#000000));
  print(x, y, TAB);
  assert y != 1 | y == 1 & (x < 4 | x > 8);
}

void keyPressed() {
  y = (int)random(6);
  if (y != 1)  x = (int)random(8);

  else do x = (int)random(8);
  while (x >= 4);

  redraw();
}

void mousePressed() {
  keyPressed();
}

GoToLoop

void keyPressed() {
  y = (int)random(6);
  if (y != 1)  x = (int)random(8);
  else while ((x = (int)random(8)) >= 4);
  redraw();
}

koogs

you don't need a do while loop in this case - just calculate y first and use a different range for x if y is 1

I don't want to have those combinations (xImg,yImg) (4,1) (5,1)(6,1)(7,1)(8,1)

y = (int)random(6);
if (y == 1) {
  x = (int)random(4); // 0 to 3
} else {
  x = (int)random(8); // 0 to 7
}

NB (int)random(n) will return a random number from 0 to n-1