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VisualizaçõesSplit canvas into 100 pieces in Javascript
So, I want to split canvas into 100 squares 50x50px and I want to do it with as little code as possible. I started making it with for loops but I would then need 10 for loops. I want to know is there a faster way with one for loop or so 
and here is the code
let canvas = document.querySelector("canvas");
canvas.width = 500;
canvas.height = 500;
let c = canvas.getContext("2d");
let x = 0;
let y = 0;
for(let i = 0; i < 10; i++)
{
if (i==0)
{
c.beginPath();
c.moveTo(0, 50);
c.lineTo(50, 50);
c.lineTo(50, 0);
c.stroke();
}
x += 50;
c.beginPath();
c.moveTo(x, 50);
c.lineTo(x + 50, 50);
c.lineTo(x + 50, 0);
c.stroke();
}
x = 0;
y = 0;
for(let i = 0; i < 10; i++)
{
if (i==0)
{
c.beginPath();
c.moveTo(0, 100);
c.lineTo(50, 100);
c.lineTo(50, 50);
c.stroke();
}
x += 50;
c.beginPath();
c.moveTo(x, 100);
c.lineTo(x + 50, 100);
c.lineTo(x + 50, 0);
c.stroke();
}
·
Juan Pablo Isaza
1 Respostas
Responde à pergunta0
Put the drawing part in a function, and loop once, like this:
let canvas = document.querySelector("canvas");
canvas.width = 501;
canvas.height = 501;
let c = canvas.getContext("2d");
function draw(X, Y, x, y) {
c.beginPath();
c.moveTo(X, Y);
c.lineTo(x, y);
c.stroke();
}
for (let n = 0.5; n < 501; n += 50) {
draw(n, 0, n, 500);
draw(0, n, 500.5, n);
}<canvas></canvas>Notice, that I've started the loop from 0.5, this "centers" the lines to the canvas pixels making the grid sharper.
·
Juan Pablo Isaza
Relatório
Responde à pergunta