98 lines
2.0 KiB
JavaScript
98 lines
2.0 KiB
JavaScript
'use strict';
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// Main variables
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let DEBUG = true;
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let canvas;
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let context;
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let cW;
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let cH;
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// FPS
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let secondsPassed;
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let oldTimeStamp;
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let fps;
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let dragging = false;
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function mMove(e) {
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if (dragging) {
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point.pX = e.offsetX * cW / canvas.clientWidth | 0;
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point.pY = e.offsetY * cH / canvas.clientHeight | 0;
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};
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}
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function mDown(e) {
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dragging = true;
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}
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function mUp(e) {
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dragging = false;
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}
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function clearContext() {
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context.fillStyle = '#b27e56';
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context.fillRect(0, 0, cW, cH);
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}
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// Init
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window.onload = function() {
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canvas = document.getElementById('game');
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context = canvas.getContext('2d');
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cW = canvas.width;
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cH = canvas.height;
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canvas.style.height = window.innerHeight + "px";
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if (DEBUG) {
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console.log('Canvas set size to ' + window.innerHeight + 'px');
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console.log(canvas.getBoundingClientRect());
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};
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canvas.addEventListener('mousedown', mDown, false);
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canvas.addEventListener('mouseup', mUp, false);
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canvas.addEventListener('mousemove', mMove, false);
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canvas.addEventListener('touchstart', mDown, false);
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canvas.addEventListener('touchend', mUp, false);
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canvas.addEventListener('touchmove', mMove, false);
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window.requestAnimationFrame(gameLoop);
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};
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window.addEventListener('resize', function() {
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let canvas = document.getElementById('game');
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canvas.style.height = window.innerHeight + "px";
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if (DEBUG) {
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console.log('Canvas resized to ' + window.innerHeight + 'px');
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console.log(canvas.getBoundingClientRect());
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};
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}, true);
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// GameLoop
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function gameLoop(timeStamp) {
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// fps counter
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secondsPassed = (timeStamp - oldTimeStamp) / 1000;
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oldTimeStamp = timeStamp;
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fps = Math.round(1 / secondsPassed);
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// end fps counter
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update();
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draw();
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if (DEBUG) {
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context.font = '15px Arial';
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context.fillStyle = '#101024';
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context.fillText('FPS: ' + fps, 10, 20);
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};
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window.requestAnimationFrame(gameLoop);
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}
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function update() {
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}
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function draw() {
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clearContext();
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}
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