Move rect's across the screen - stacker game.

Programming Questions

noahsdev

Move rect's across the screen - stacker game.

in Programming Questions • 21 days ago

So I can move the blocks by adjusting the values in the array (which will help later) but I am having trouble with the time interval. How can I get it to move every .5s (for example) without affecting (or stopping) the rest of the program?

The space is 7x15 (with a space at the bottom) and the rects are multiplied my 1-7 depending on which column and 1-15 depending on the row.

This is the relevant function but let me know if I should include the rest of the code. It is just the background and a button that is yet to be given the 'stop' part.

void moveLights()
{
int rowNum[] = {2,3,4};
//These will show rects 2,3 and 4. Adjust for desired column number.
for (int lights = 0;lights<=rowNum.length-1;lights++)
{
rect(rowNum[lights]*(width/7)-(width/14),(15*(height-50)/15)-((height-50)/30),width/7,(height-50)/15);
//First val (^) rowNum is column number '15' (^) represents row num - 15 is the bottom row
}
}

Replies(3)

GoToLoop

Re: Move rect's across the screen - stacker game.

21 days ago

If I get it right, you want some optimization?
Most I can do is cache any fixed pre-calculations before starting that drawing for loop block.
That helps so a little b/c no extra unnecessary math is done again and again while looping.

final static int COLS = 7, ROWS = 15;
final static int rowsNum[] = {1, 2, 4, 6};

void setup() {
  size(500, 700);
  noLoop();
  
  background(0);
  fill(#FFFF00);
  stroke(0);
  strokeWeight(4);
  
  moveLights(rowsNum);
}

void moveLights(int[] rowsArr) {
  final int wCols = width/COLS, hRows = (height-50)/ROWS;
  final int wColH = wCols >> 1, hRowH = hRows >> 1;
  final int Row15 = 15*hRows - hRowH;

  for ( int i = rowsArr.length; i-- != 0; 
    rect(rowsArr[i]*wCols - wColH, Row15, wCols, hRows) );
}

cageehv

Re: Re: Move rect's across the screen - stacker game.

21 days ago

Hey noahsdev,

I think you mean 'how to call moveLights() at a specific rate (lower than the actual frameRate)'?

In that case, do something like this:

void draw()
{
if (frameCount%15 == 0) moveLights(arr);
// your other stuff...
}
void moveLights(int[] rowsArr)
{
// do your moveLights stuff...
}

In the above example: if the actual frameRate is 30 FPS, the function will be called 2 times per second.

You also can use frameRate to calculate the actual time for calling the function. That way your can make it run every .5 secs on any machine / CPU.

Hope this helps!

Rolf

noahsdev

Re: Move rect's across the screen - stacker game.

21 days ago

Thankyou! I didn't know that frameCount even existed but it is exactly what I was looking for. Thankyou :)

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