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start.html
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<!DOCTYPE html>
<!-- Свали последната версия от: https://github.com/StanislavNikolov/gamedev_pishtov -->
<!-- Download the latest verion from: https://github.com/StanislavNikolov/gamedev_pishtov -->
<html>
<head>
<style>
body, canvas {
margin: 0;
padding: 0;
overflow: hidden;
}
</style>
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=0">
<meta charset="UTF-8"></meta> <!-- allows for cyrillic and other exotic text in console.logs -->
</head>
<body onload="init()">
<canvas id="canvas-id" width="800" height="600"></canvas>
<script>
function areColliding(Ax, Ay, Awidth, Aheight, Bx, By, Bwidth, Bheight) {
if (Bx <= Ax + Awidth) {
if (Ax <= Bx + Bwidth) {
if (By <= Ay + Aheight) {
if (Ay <= By + Bheight) {
return 1;
}
}
}
}
return 0;
};
function randomInteger(upTo){
return Math.floor(Math.random()*upTo);
}
function drawLine(startX, startY, endX, endY) {
// For better performance bunch calls to lineTo WITHOUT beginPath() and stroke() inbetween.
context.beginPath(); // resets the current path
context.moveTo(startX, startY);
context.lineTo(endX, endY);
context.stroke();
}
function tryToLoad(imageNameWithoutDotPng, backupColor) {
return tryToLoadWithFullPath(imageNameWithoutDotPng + '.png', backupColor);
}
function tryToLoadWithFullPath(imageNameAndPath, backupColor) {
return {
img : new Image(),
src : "images/" + imageNameAndPath,
color : backupColor,
needed: false // flag letting know drawImage to request the actual image if ever used
};
}
function drawImage(img, x, y, xs, ys) {
if(img == null) {
// invalid image
console.error('Tried to draw invalid image');
return;
}
if(img.needed !== true) {
img.needed = true;
img.img.src = img.src;
}
try {
if (xs != null) context.drawImage(img.img, x, y, xs, ys);
else context.drawImage(img.img, x, y);
} catch(e) {
context.fillStyle = img.color;
if(xs == null) {
xs = 100;
ys = 100;
}
context.fillRect(x, y, xs, ys);
}
}
const assets = [
["arrowDown","black"],
["arrowDownLeft","black"],
["arrowDownRight","black"],
["arrowLeft","black"],
["arrowRight","black"],
["arrowUp","black"],
["arrowUpLeft","black"],
["arrowUpRight","black"],
["backAlien","blue"],
["backBeach","blue"],
["backCactus","orange"],
["backCake","pink"],
["backClouds","blue"],
["backDesert","orange"],
["backForest","green"],
["backGrass","green"],
["backHills","orange"],
["backIndustry","blue"],
["backMarket","yellow"],
["backMountain","green"],
["backMushrooms","yellow"],
["backNight","blue"],
["backSea","blue"],
["backSpikes","brown"],
["backStars","black"],
["backSun","purple"],
["backSunset","brown"],
["backTower","blue"],
["backTrees","blue"],
["backWaterfall","blue"],
["backWaves","blue"],
["ballOrTarget","blue"],
["ballOrTree","green"],
["barrelGreen","green"],
["barrelGrey","gray"],
["barrelRed","red"],
["bee","yellow"],
["bird","brown"],
["bomb","gray"],
["box","brown"],
["boxAlienGreenSuit","green"],
["boxAlienYellowSquare","yellow"],
["boxAlienYellowSuit","yellow"],
["boxItem","yellow"],
["boxItemBoxed","yellow"],
["boxItemDisabled","gray"],
["boxItemDisabledBoxed","gray"],
["building","gray", "0"],
["building","gray", "1"],
["building","gray", "2"],
["building","gray", "3"],
["bullet","green"],
["burgerBronze","brown"],
["burgerGold","yellow"],
["burgerSilver","gray"],
["bush1","red"],
["bush2","orange"],
["cactus","green"],
["cat","orange"],
["carBlack","black"],
["carBlue","blue"],
["carBody","red"],
["carGreen","green"],
["carRed","red"],
["carYellow","yellow"],
["cherry","orange"],
["cloud","white"],
["crosshairBlue","blue"],
["crosshairOutline","white"],
["crystal","green"],
["duckOutlineTarget","green"],
["duckTarget","green"],
["enemyBlack1","black"],
["enemyBlack2","black"],
["enemyBlack3","black"],
["enemyBlack4","black"],
["enemyBlack5","black"],
["enemyBlue1","blue"],
["enemyBlue2","blue"],
["enemyBlue3","blue"],
["enemyBlue4","blue"],
["enemyBlue5","blue"],
["enemyGreen1","green"],
["enemyGreen2","green"],
["enemyGreen3","green"],
["enemyGreen4","green"],
["enemyGreen5","green"],
["enemyRed1","red"],
["enemyRed2","red"],
["enemyRed3","red"],
["enemyRed4","red"],
["enemyRed5","red"],
["explosion","red"],
["explosion1","red"],
["explosion2","red"],
["femaleAction","blue"],
["femaleJump","blue"],
["femaleStand","blue"],
["femaleWalk1","blue"],
["flagBlue1","blue"],
["flagGreen1","green"],
["flagRed1","red"],
["flagYellow1","yellow"],
["flagYellow2","yellow"],
["flower1","pink"],
["flower2","brown"],
["flower3","yellow"],
["flower4","red"],
["flower5","orange"],
["flowerBlue","blue"],
["flowerPurple","purple"],
["flowerRed","red"],
["flowerSmall","blue"],
["flyMan","orange"],
["gemBlue","blue"],
["gemGreen","green"],
["gemRed","red"],
["gemYellow","yellow"],
["gem","blue", "0"],
["gem","green", "10"],
["gem","blue", "11"],
["gem","green", "12"],
["gem","blue", "13"],
["gem","green", "14"],
["gem","blue", "15"],
["gem","green", "16"],
["gem","blue", "17"],
["gem","green", "18"],
["gem","blue", "19"],
["gem","green", "1"],
["gem","blue", "20"],
["gem","green", "21"],
["gem","blue", "22"],
["gem","green", "23"],
["gem","blue", "24"],
["gem","green", "25"],
["gem","blue", "26"],
["gem","green", "27"],
["gem","blue", "28"],
["gem","green", "29"],
["gem","blue", "2"],
["gem","green", "30"],
["gem","blue", "31"],
["gem","green", "32"],
["gem","blue", "33"],
["gem","green", "34"],
["gem","blue", "35"],
["gem","green", "36"],
["gem","blue", "37"],
["gem","green", "38"],
["gem","blue", "39"],
["gem","green", "3"],
["gem","blue", "40"],
["gem","green", "41"],
["gem","blue", "42"],
["gem","green", "43"],
["gem","blue", "44"],
["gem","green", "45"],
["gem","blue", "46"],
["gem","green", "47"],
["gem","blue", "4"],
["gem","green", "5"],
["gem","blue", "6"],
["gem","green", "7"],
["gem","blue", "8"],
["gem","green", "9"],
["grass","green"],
["groundCake","pink"],
["groundGrass","green"],
["groundSnow","white"],
["groundStone","gray"],
["gummyWorm","pink"],
["heart","red"],
["heartSmall","red"],
["heroHello","blue"],
["heroStand","blue"],
["heroWalk","blue"],
["house","green", "0"],
["house","blue", "1"],
["house","gray", "2"],
["house","brown", "3"],
["house","red", "4"],
["jelly","gray", "0"],
["jelly","yellow", "1"],
["jelly","green", "2"],
["jelly","red", "3"],
["jelly","blue", "4"],
["jelly","purple", "5"],
["jetpack","gray"],
["jewelBlue","blue"],
["jewelGreen","green"],
["jewelRed","red"],
["jewelYellow","yellow"],
["joystick","black"],
["laserBlue","blue", "0"],
["laserBlue","blue", "1"],
["laserBlue","blue", "2"],
["laserGreen","green", "0"],
["laserGreen","green", "1"],
["laserGreen","green", "2"],
["laserRed","red", "0"],
["laserRed","red", "1"],
["laserRed","red", "2"],
["lava","red"],
["lollipopFruitYellow","yellow"],
["missile","red", "0"],
["missile","blue", "1"],
["missile","blue", "2"],
["missile","blue", "3"],
["missile","blue", "4"],
["missile","blue", "5"],
["missile","blue", "6"],
["missile","red", "7"],
["missile","red", "8"],
["missile","red", "9"],
["motorBlack","black"],
["motorBlue","blue"],
["motorGreen","green"],
["motorRed","red"],
["motorYellow","yellow"],
["ninja","purple", "0"],
["ninja","purple", "1"],
["ninja","purple", "2"],
["ninja","purple", "3"],
["ninja","purple", "4"],
["ninja","purple", "5"],
["ninja","purple", "6"],
["ninja","purple", "7"],
["ninja","purple", "8"],
["ninja","purple", "9"],
["note","black"],
["paddle","blue"],
["parrot","blue"],
["pillBlue","blue"],
["pillGreen","green"],
["pillRed","red"],
["pillYellow","yellow"],
["pirate","brown", "0"],
["pirate","brown", "10"],
["pirate","brown", "11"],
["pirate","brown", "12"],
["pirate","brown", "13"],
["pirate","brown", "14"],
["pirate","brown", "15"],
["pirate","brown", "1"],
["pirate","brown", "2"],
["pirate","brown", "3"],
["pirate","brown", "4"],
["pirate","brown", "5"],
["pirate","brown", "6"],
["pirate","brown", "7"],
["pirate","brown", "8"],
["pirate","brown", "9"],
["pirateHero","green"],
["plane","green"],
["planeGray","gray"],
["planeGreen","green"],
["playerShip1_blue","blue"],
["playerShip1_green","green"],
["playerShip1_orange","orange"],
["playerShip1_red","red"],
["playerShip2_blue","blue"],
["playerShip2_green","green"],
["playerShip2_orange","orange"],
["playerShip2_red","red"],
["playerShip3_blue","blue"],
["playerShip3_green","green"],
["playerShip3_orange","orange"],
["playerShip3_red","red"],
["powerupBlue","blue"],
["powerupBlueBolt","blue"],
["powerupBlueShield","blue"],
["powerupBlueStar","blue"],
["powerupGreen","green"],
["powerupGreenBolt","green"],
["powerupGreenShield","green"],
["powerupGreenStar","green"],
["powerupRed","red"],
["powerupRedBolt","red"],
["powerupRedShield","red"],
["powerupRedStar","red"],
["powerupYellowShield","yellow"],
["powerupYellow","yellow"],
["powerupYellowBolt","yellow"],
["powerupYellowStar","yellow"],
["princess","pink", "0"],
["princess","pink", "10"],
["princess","pink", "11"],
["princess","pink", "12"],
["princess","pink", "13"],
["princess","pink", "14"],
["princess","pink", "15"],
["princess","pink", "16"],
["princess","pink", "17"],
["princess","pink", "18"],
["princess","pink", "19"],
["princess","pink", "1"],
["princess","pink", "2"],
["princess","pink", "3"],
["princess","pink", "4"],
["princess","pink", "5"],
["princess","pink", "6"],
["princess","pink", "7"],
["princess","pink", "8"],
["princess","pink", "9"],
["repair","blue"],
["robot","blue"],
["robotJump","blue"],
["robotHero","yellow", "0"],
["robotHero","yellow", "1"],
["robotHero","yellow", "2"],
["robotHero","yellow", "3"],
["robotHero","yellow", "4"],
["robotHero","yellow", "5"],
["robotHero","yellow", "6"],
["robotHero","yellow", "7"],
["rock","gray"],
["rocket","red", "0"],
["rocket","red", "1"],
["rocket","red", "2"],
["rocket","red", "3"],
["sailor","red"],
["scrollHorizontal","black"],
["scrollVertical","black"],
["shieldBronze","brown"],
["shieldGold","yellow"],
["shieldSilver","gray"],
["shooter","brown"],
["shop","red"],
["sign","brown"],
["signExit","brown"],
["signLeft","brown"],
["signRight","brown"],
["spaceship","red", "0"],
["spaceship","red", "1"],
["spaceship","red", "2"],
["spaceship","red", "3"],
["spaceship","red", "4"],
["spaceship","red", "5"],
["spaceship","red", "6"],
["spaceship","red", "7"],
["spaceship","red", "8"],
["spaceship","red", "9"],
["spaceStation","blue", "0"],
["spaceStation","yellow", "1"],
["spaceStation","blue", "2"],
["spaceStation","yellow", "3"],
["spikeMan","red"],
["spring","orange"],
["springMan","orange"],
["sprung","orange"],
["spy","black", "0"],
["spy","black", "1"],
["spy","black", "2"],
["spy","black", "3"],
["spy","black", "4"],
["spy","black", "5"],
["spy","black", "6"],
["spy","black", "7"],
["spy","black", "8"],
["spy","black", "9"],
["star","yellow"],
["starBronze","brown"],
["starDiamond","blue"],
["starGold","yellow"],
["starSilver","gray"],
["sun","yellow"],
["tanksAmmo","black"],
["tanksArmor","red"],
["tank","gray", "0"],
["tank","gray", "1"],
["tank","green", "2"],
["tank","green", "3"],
["tank","red", "4"],
["tank","red", "5"],
["tank","black", "6"],
["tank","black", "7"],
["thunderBronze","brown"],
["thunderGold","yellow"],
["thunderGray","gray"],
["torch","red"],
["torchOff","brown"],
["tree","orange", "0"],
["tree","red", "1"],
["tree","yellow", "2"],
["tree","green", "3"],
["tree","brown", "4"],
["troll","green"],
["vehicle","gray", "0"],
["vehicle","gray", "10"],
["vehicle","gray", "11"],
["vehicle","gray", "12"],
["vehicle","gray", "13"],
["vehicle","gray", "14"],
["vehicle","gray", "15"],
["vehicle","gray", "1"],
["vehicle","gray", "2"],
["vehicle","gray", "3"],
["vehicle","gray", "4"],
["vehicle","gray", "5"],
["vehicle","gray", "6"],
["vehicle","gray", "7"],
["vehicle","gray", "8"],
["vehicle","gray", "9"],
["volcano","black"],
["zombie","green"],
["zombieHello","green"],
["zombieWalk","green"],
];
// load assets (sprites) as global variables
for(const asset of assets) {
const name = asset[0];
const backupColor = asset[1];
const index = asset[2];
if(asset.length === 2) { // normal image
window[name] = tryToLoad(name, backupColor);
}
if(asset.length === 3) { // array of images
if(window[name] == null) {
window[name] = [];
}
window[name][Number(index)] = tryToLoad(`${name}[${index}]`, backupColor);
}
}
let endlessCanvas = false;
let updateTime = 10; // in ms
const canvas = document.getElementById("canvas-id");
const context = canvas.getContext("2d");
context.fillStyle = "#0000ff";
// global variables with mouse coordinates
let mouseX = 0;
let mouseY = 0;
// some keycodes
let key_left = 37;
let key_up = 38;
let key_right = 39;
let key_down = 40;
let key_a = 65;
let key_z = 90;
let isKeyPressed = [];
for (i = 0; i < 256; ++i) {
isKeyPressed.push(0);
}
// gridSize = 50; // uncomment or add to game.js if you want a grid
const reqAnimationFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame || window.webkitRequestAnimationFrame || window.msRequestAnimationFrame || function (callback) {
setTimeout(callback, 1000 / 30);
};
function redraw() {
context.clearRect(0, 0, canvas.width, canvas.height);
draw(); // call progammer's draw() function
context.globalAlpha = 1;
// draw grid
//context.fillStyle = "#FF0000";
context.font = "10px Arial";
if (typeof gridSize != "undefined" && gridSize >= 25) {
context.fillText(0, 4, 10);
context.beginPath();
for(i = gridSize;i < canvas.width;i += gridSize) {
context.moveTo(i, 0);
context.lineTo(i, canvas.height);
context.fillText(i, i + 4, 10);
}
for(i = gridSize;i < canvas.height;i += gridSize) {
context.moveTo(0, i);
context.lineTo(canvas.width, i);
context.fillText(i, 4, i + 10);
}
context.stroke();
}
reqAnimationFrame(redraw);
};
function init() {
if (endlessCanvas) {
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
window.onresize = function () {
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
};
} else {
canvas.width = 800;
canvas.height = 600;
}
if ('ontouchstart' in window || navigator.maxTouchPoints) {
isMobile = true;
window.addEventListener("touchstart", function (e) {
let touchobj = e.changedTouches[0];
mouseX = parseInt(touchobj.pageX - canvas.offsetLeft);
mouseY = parseInt(touchobj.pageY - canvas.offsetTop);
mousedown();
});
window.addEventListener("touchend", function (e) {
let touchobj = e.changedTouches[0];
mouseX = parseInt(touchobj.pageX - canvas.offsetLeft);
mouseY = parseInt(touchobj.pageY - canvas.offsetTop);
mouseup();
});
window.addEventListener("touchmove", function (e) {
let touchobj = e.changedTouches[0];
mouseX = parseInt(touchobj.pageX - canvas.offsetLeft);
mouseY = parseInt(touchobj.pageY - canvas.offsetTop);
});
}
window.addEventListener("mousemove", function (e) {
mouseX = e.pageX - canvas.offsetLeft;
mouseY = e.pageY - canvas.offsetTop;
});
if(typeof mousemove != "undefined") {
window.addEventListener("mousemove", mousemove);
}
if(typeof mouseup != "undefined") {
window.addEventListener("mouseup", mouseup);
}
if(typeof mousedown != "undefined") {
window.addEventListener("mousedown", mousedown);
}
if(typeof keydown != "undefined") {
window.addEventListener("keydown", function (e) {
isKeyPressed[e.keyCode] = 1;
keydown(e.keyCode);
});
} else {
window.addEventListener("keydown", function (e) {
isKeyPressed[e.keyCode] = 1;
});
}
if(typeof keyup != "undefined") {
window.addEventListener("keyup", function (e) {
isKeyPressed[e.keyCode] = 0;
keyup(e.keyCode);
});
} else {
window.addEventListener("keyup", function (e) {
isKeyPressed[e.keyCode] = 0;
});
}
if(typeof draw == "undefined") {
redraw = function () {
context.clearRect(0, 0, canvas.width, canvas.height);
context.globalAlpha = 1;
context.fillStyle = "#FF0000";
context.font = "20px Arial";
context.fillText("Press <F12> for error info!", 40, 40);
};
}
redraw();
setInterval(update, updateTime);
}
</script>
<!-- user's game file -->
<script src="./game.js"></script>
</body>
</html>