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AAAAAA.html
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AAAAAA.html
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<!DOCTYPE html>
<html>
<head>
<title>AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA</title>
</head>
<body>
<script>
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//CONSTANTS
var CV_W = 800;
var CV_H = 600;
var NN_W = 181;
var NN_H = 229;
var GRD_Y = 540;
var NN_Y_ACC = 1;
var SPC_KEYCODE = 32; //keycode
var NN_JUMP_SPD = 20;
var NN_X_SPD = 20;
var BG_W = 1000;
var NN_NR_FPROW = 5;
var NN_NR_ANIMFRAMES = 7;
var NN_ANIMSPEED = 3;
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//SETUP
//I. Canvas
var canvas = document.createElement('canvas');
var c = canvas.getContext('2d');
canvas.width = CV_W;
canvas.height = CV_H;
document.body.appendChild(canvas);
//II. Nanonaut
var nanonautImage = new Image();
nanonautImage.src = 'animatednanonaut.png';
var nanonautX = CV_W / 2;
var nanonautY = GRD_Y - NN_H;
//III. Background
//I. Sky
c.fillStyle = '#adfcff';
c.fillRect (0, 0, CV_W, GRD_Y - 40);
//II. BG
var backgroundImage = new Image();
backgroundImage.src = 'background.png';
//III. Ground
c.fillStyle = '#91ffa9';
c.fillRect (0, GRD_Y - 40, CV_W, CV_H - GRD_Y + 40);
//IV. Nanonaut movement
window.addEventListener('keydown', onKeyDown);
window.addEventListener('keyup', onKeyUp);
window.addEventListener('load', start);
function start(){
window.requestAnimationFrame(mainLoop);
}
var nanonautYspd = 0;
var spcKeyIsPressed = false; //keypress variable
var nanonautAir= false;
var nanonautFrameNr = 0;
//V. Camera
var camX = 0;
var camY = 0;
//VI. Sprites
//I. Nanonaut
var nanonautSpriteSheet = {
nrFramePerRow: 5,
spriteWidth: NN_W,
spriteHeight: NN_H,
image: nanonautImage
};
var gameFrameCtr = 0;
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//MAIN LOOP
function mainLoop(){
update();
draw();
window.requestAnimationFrame(mainLoop);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//PLAYER INPUT
function onKeyDown(event) {
if (event.keyCode === SPC_KEYCODE) {
spcKeyIsPressed = true;
}
}
function onKeyUp(event) {
if (event.keyCode === SPC_KEYCODE){
spcKeyIsPressed = false;
}
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//UPDATING
function update(){
gameFrameCtr = gameFrameCtr + 1;
//I. Running
nanonautX = nanonautX + NN_X_SPD;
//II. Jumping
if (spcKeyIsPressed) { //when "x" key is pressed
nanonautYspd = -NN_JUMP_SPD;
nanonautAir = true;
}
//III. Gravity
nanonautY = nanonautY + nanonautYspd;
nanonautYspd = nanonautYspd + NN_Y_ACC;
if (nanonautY > (GRD_Y - NN_H)) {
nanonautY = GRD_Y - NN_H;
nanonautYspd = 0;
nanonautAir = false;
}
//IV. Camera
camX = nanonautX - 150;
//V. Animation
if ((gameFrameCtr % NN_ANIMSPEED) === 0) {
nanonautFrameNr = nanonautFrameNr + 1;
if (nanonautFrameNr >= NN_NR_ANIMFRAMES) {
nanonautFrameNr = 0;
}
}
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//DRAWING
function draw(){
c.clearRect(0, 0, CV_W, CV_H);
//Background
//I. Sky
c.fillStyle = '#adfcff';
c.fillRect (0, 0, CV_W, GRD_Y - 40);
//II. BG
var backgroundImage = new Image();
backgroundImage.src = 'background.png';
//II - A. BG Movement
var bgX = - (camX % BG_W);
c.drawImage(backgroundImage, bgX, - 210);
c.drawImage(backgroundImage, bgX + BG_W, - 210);
//III. Ground
c.fillStyle = '#91ffa9';
c.fillRect (0, GRD_Y - 40, CV_W, CV_H - GRD_Y + 40);
//I. Nanonaut
var nanonautSpriteSheetRow = Math.floor(nanonautFrameNr / NN_NR_FPROW);
var nanonautSpriteSheetColumn = nanonautFrameNr % NN_NR_FPROW;
var nanonautSpriteSheetX = nanonautSpriteSheetColumn * NN_W;
var nanonautSpriteSheetY = nanonautSpriteSheetRow * NN_H;
c.drawImage(nanonautImage, nanonautSpriteSheetX, nanonautSpriteSheetY, NN_W, NN_H, nanonautX - camX, nanonautY - camY, NN_W, NN_H);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
</script>
</body>
</html>