Chessboard no % and with nested loop | Coding Train, Choo choo! | Page 1

hollow grail Oct 17, 2023, 2:38 PM

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Hello everyone I don't know if this is the right section to post problems/questions about codes...but here I go I'm Andrea I followed Dan (AKA the legend) for a long time. I started to get involved in coding lately and I was wondering if it is possible to make a chessboard 8X8 only using the conditional "if/else/else if" and "for/nested loop" without the module operator (%)...I managed to make it with just one loop but I really want to use a nested loop for it

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I get this with one for loop:

function setup() {
createCanvas(450, 450);
}

function draw() {
background(220);
let x = 0;
let y = 0;
let c = false;
let lato = 50;

for (i = 0; i < 64; i++) {

if (c) {
  fill(0);
} else {
  fill(255);
}

rect(x * lato, y * lato, lato);
x++;
c = !c;

if (x == 8) {
  y++;
  x = 0;
  c = !c;
}

}
}

slate rune Oct 17, 2023, 2:45 PM

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you might be able to get away with just having a for loop for both rows and columns. Have a variable that keeps inversing itself (so every iteration it becomes the opposite of what it was) and then use that to determine the colour of the field. Just calculate the X and Y coordinates then and draw it out

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if that's what you mean

hollow grail Oct 17, 2023, 2:51 PM

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let x = 50;
let y = 50;
let c = false;

function setup() {
createCanvas(500, 500);
background(128);
for (let j = 0; j < 8; j++) {
for (let i = 0; i < 8; i++) {
if (c) {
fill(0);
} else {
fill(255);
}
rect(x * i, y * j, 50);
c = !c;
}
}
}

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I mean that...

slate rune Oct 17, 2023, 2:53 PM

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so you figured it out? 😅

hollow grail Oct 17, 2023, 2:53 PM

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I don't know how to get the right code...in my mind is correct

slate rune Oct 17, 2023, 2:53 PM

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it looks right to me

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it doesn't work?

hollow grail Oct 17, 2023, 2:53 PM

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no if u open the editor and put the code u will see

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it color only column

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all the column

slate rune Oct 17, 2023, 2:54 PM

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ah okay I see

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just add c = !c after the first nested loop

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to get it to offset

hollow grail Oct 17, 2023, 2:55 PM

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-.- OMFG it was so simple... and I'm so stupid

slate rune Oct 17, 2023, 2:56 PM

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haha no worries

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it doesn't offset because you're dealing with an even number of columns & rows

hollow grail Oct 17, 2023, 2:57 PM

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if you ever pass through Italy in Roma send me a DM you got a free beer

slate rune Oct 17, 2023, 2:57 PM

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good luck with the project!

hollow grail Oct 17, 2023, 2:58 PM

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I have a lot to learn...I'm start tinking that I'm hopeless

slate rune Oct 17, 2023, 2:59 PM

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Everyone has to start somewhere. We all started with 0 knowledge and through practicing a lot and learning from our mistakes, ended up with the skills we have now!

#Chessboard no % and with nested loop