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RatHunter.html
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RatHunter.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>Rat Hunter</title>
<meta charset="UTF-8" />
<link rel="stylesheet" type="text/css" href="style.css">
<script type="text/javascript" src="mapBackground.js"></script>
<script type="text/javascript" src="modernizr.js"></script>
<script>
var mapTilesheet = new Image();
mapTilesheet.src = "imgs/tilesheet.png";
var firefoxTilesheet = new Image();
firefoxTilesheet.src = "imgs/firefox.png";
var controlCharacter;
var TileMap;
var FirefoxCharacter;
var firefoxFrameIndex = 0;
var allElements;
var GameSounds;
function canvasSupport() {
return Modernizr.canvas;
}
function mainDraw() {
requestAnimationFrame(mainDraw);
AllElements.forEach(function(element) {
element.draw()
});
}
var Keys = {
up: 38,
left: 37,
right: 39,
down: 40
};
var TileMap = {
draw: function() {
var indexOffset = -1;
var tileSize = 32;
var mapRows = 24;
var mapCols = 32;
var numberRowTiles = 30;
//the following arrays can be found under mapBackground.js
for (var r = 0; r < mapRows; r++) {
for (var c = 0; c < mapCols; c++) {
// draws the background grass (first layer)
var tileID = grassTilemap[r][c] + indexOffset;
var sourceX = Math.floor(tileID % numberRowTiles) * tileSize;
var sourceY = Math.floor(tileID / numberRowTiles) * tileSize;
ctx.drawImage(mapTilesheet, sourceX, sourceY, tileSize, tileSize, c * tileSize, r * tileSize, tileSize, tileSize);
// draws the objects on the background (second layer)
tileID = objectsTilemap[r][c] + indexOffset;
sourceX = Math.floor(tileID % numberRowTiles) * tileSize;
sourceY = Math.floor(tileID / numberRowTiles) * tileSize;
ctx.drawImage(mapTilesheet, sourceX, sourceY, tileSize, tileSize, c * tileSize, r * tileSize, tileSize, tileSize);
}
}
}
};
var FirefoxCharacter = {
x: 0,
y: 0,
speed: 0,
defaultSpeed: 10,
directions: {
right: 0,
left: 32,
up: 64,
down: 96
},
currentDirection: 0,
imageIndex: 0,
lastDrawTime: 0,
draw: function() {
var currentTime = new Date().getTime();
if (currentTime - this.lastDrawTime > 200 && this.speed > 0) {
this.imageIndex++;
this.lastDrawTime = new Date().getTime();
if (this.imageIndex > 4) {
this.imageIndex = 0;
}
}
ctx.drawImage(firefoxTilesheet, this.imageIndex * 32, this.currentDirection, 32, 32, this.x, this.y, 70, 70);
},
moveUp: function() {
this.y-=this.speed;
this.speed = this.defaultSpeed;
this.currentDirection = this.directions.up;
},
moveLeft: function() {
this.x-=this.speed;
this.speed = this.defaultSpeed;
this.currentDirection = this.directions.left;
},
moveRight: function() {
this.x+=this.speed;
this.speed = this.defaultSpeed;
this.currentDirection = this.directions.right;
},
moveDown: function() {
this.y+=this.speed;
this.speed = this.defaultSpeed;
this.currentDirection = this.directions.down;
},
stop: function() {
this.speed = 0;
this.imageIndex = 4;
}
};
var GameSounds = {
backgroundMusic: new Audio("sounds/backgroundMusic.ogg")
};
AllElements = [
TileMap,
FirefoxCharacter
];
function keyDown(aEvent) {
switch(aEvent.keyCode) {
case Keys.up:
controlCharacter.moveUp();
break;
case Keys.left:
controlCharacter.moveLeft();
break;
case Keys.right:
controlCharacter.moveRight();
break;
case Keys.down:
controlCharacter.moveDown();
break;
}
}
function keyUp(aEvent) {
controlCharacter.stop();
}
function init() {
if (!canvasSupport()) {
document.write("Your Browser doesn't support Canvas, please download the latest Mozilla Firefox Browser");
} else {
var canvas = document.getElementById("canvas");
ctx = canvas.getContext("2d");
controlCharacter = FirefoxCharacter; // current controllable character
GameSounds.backgroundMusic.loop = true;
GameSounds.backgroundMusic.play();
window.onkeydown = keyDown;
window.onkeyup = keyUp;
requestAnimationFrame(mainDraw);
}
};
</script>
</head>
<body onload="init();">
<div id="title" align="center">
Rat Hunter
</div>
<div id="centerCanvas">
<canvas id="canvas" width="1024" height="768"></canvas>
</div>
</body>
</html>