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PO2d html5 canvas collision, howto
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2013-07-19T03:21:51.080
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As the title suggests, I am having trouble with object collision... I am currently working on a 2d Html5 canvas game using JavaScript. I know how to keep the "player" object from going outside the width/height of the game canvas, and i know how to do something when the player collides with an object (such as a power up or enemy or whatever) but i just don't know how to make a "solid" object meaning when the player hits the solid object, the player just stops, and cannot go through the solid object. This is what I have now (not all the code just what I feel is relevant, sorry if it's too much/too little.: <pre><code> var canvasPlayer = document.getElementById('canvasPlayer'); var ctxPlayer = canvasPlayer.getContext('2d'); var canvasWalls = document.getElementById('canvasWalls'); var ctxWalls = canvasWalls.getContext('2d'); function checkKeyDown(e) { var keyID = (e.keyCode) || e.which; if (keyID === 38 || keyID === 87) { // up arrow OR W key if (!player1.isDownKey && !player1.isLeftKey && !player1.isRightKey) { player1.isUpKey = true; e.preventDefault(); } } if (keyID === 39 || keyID === 68) { //right arrow OR D key if (!player1.isDownKey && !player1.isLeftKey && !player1.isUpKey) { player1.isRightKey = true; e.preventDefault(); } } if (keyID === 40 || keyID === 83) {//down arrow OR S key if (!player1.isUpKey && !player1.isLeftKey && !player1.isRightKey) { player1.isDownKey = true; e.preventDefault(); } } if (keyID === 37 || keyID === 65) {//left arrow OR A key if (!player1.isDownKey && !player1.isUpKey && !player1.isRightKey) { player1.isLeftKey = true; e.preventDefault(); } } } Walls.prototype.draw = function (){ ctxWalls.drawImage(imgSprite,this.srcX,this.srcY,this.width,this.height,this.drawX,this.drawY,this.width,this.height); this.checkHitPlayer(); }; Walls.prototype.checkHitPlayer = function() { if (this.drawX > player1.drawX && this.drawX <= player1.drawX + player1.width && this.drawY >= player1.drawY && this.drawY < player1.drawY + player1.height) { player1.isUpKey = false; player1.isDownKey = false; player1.isRightKey = false; player1.isLeftKey = false; } }; </code></pre> This works... except when trying to go up or left, the player only moves maybe 2-3 pixels, so it takes 3 left or up arrows to go left or up. As well the player can move straight through the wall which is not what i want. Any help is much appreciated sorry if i included too much or not enough code. Oh, i also forgot to mention the game is a puzzle game, and I have it set-up so a player can only move one direction at a time until hitting a wall.
Tags
<javascript><html5><canvas><html5-canvas><collision>
Title
2d html5 canvas collision, howto
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