function initGrid(gridsize) { var grid = new Array(gridsize); for (var i = 0; i < gridsize; i++) { grid[i] = new Array(gridsize); for (var k = 0; k < gridsize; k++) { grid[i][k] = false; } } return grid; } //ctx.rect(0,0,c.width/gridsize, c.height/gridsize); function getCursorPositionOnCanvas(canvas, event) { var rect = canvas.getBoundingClientRect(); var x = event.clientX - rect.left; var y = event.clientY - rect.top; return { x: x, y: y }; } function drawPointOnCanvas(canvas, event, ctx) { var pos = getCursorPositionOnCanvas(canvas, event); ctx.moveTo(pos.x, pos.y); ctx.lineTo(pos.x + 1, pos.y + 1); ctx.stroke(); } function resizeCanvas(canvas) { canvas.width = (window.innerHeight / 100) * 90; canvas.height = (window.innerHeight / 100) * 90; } function drawGrid(gridsize, grid, c, ctx) { var knilchon = new Image(); knilchon.src = 'knilch.png'; knilchon.onload = function (e) { var knilchoff = new Image(); knilchoff.src = 'knilchoff.png'; knilchoff.onload = function (e) { for (var i = 0; i <= gridsize; i++) { for (var k = 0; k <= gridsize; k++) { if (grid[i][k] == true) { ctx.drawImage(knilchon, (i * c.width) / gridsize, (k * c.height) / gridsize, c.width / gridsize, c.height / gridsize); } else { ctx.drawImage(knilchoff, (i * c.width) / gridsize, (k * c.height) / gridsize, c.width / gridsize, c.height / gridsize); } ctx.rect((i * c.width) / gridsize, (k * c.height) / gridsize, c.width / gridsize, c.height / gridsize); } } ctx.stroke(); }; }; } function populateGrid(grid, gridsize) { for (var i = 0; i < gridsize; i++) { for (var k = 0; k < gridsize; k++) { if (Math.random() > 0.5) { grid[i][k] = true; } else { grid[i][k] = false; } } } return grid; } function bodyLoad() { var gridsize = 3; var grid = initGrid(gridsize); grid = populateGrid(grid, gridsize); var c = document.getElementById("Game"); resizeCanvas(c); c.addEventListener("mousedown", function (e) { drawPointOnCanvas(c, e, ctx); }); var ctx = c.getContext("2d"); ctx.moveTo(0, 0); drawGrid(gridsize, grid, c, ctx); }