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index.html
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index.html
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<!DOCTYPE html>
<html>
<head>
<title> Joc de la serp </title>
<style>
canvas {background: black}
</style>
</head>
<script>
const PUNT_MIDA = 10;
var canvas;
var ctx;
const MAX_RAND = 29;
const TOTS_PPUNTS = 900;
var h;
var poma;
var b;
const C_AMPLE = 300;
const C_ALTURA = 300;
var pps;
var poma_x;
var poma_y;
const RETARD = 140;
var esquerre_Direccio = false;
var dretaDireccio = true;
var amunt_direccio = false;
var AvallDireccio = false;
var inGame = true;
const KEYBOARD_KEYS = Object();
KEYBOARD_KEYS["ESQUERRE_KEY"] = 37;
KEYBOARD_KEYS["DRETA_KEY"] = 39;
KEYBOARD_KEYS["AMUNT_KEY"] = 38;
KEYBOARD_KEYS["AVALL_KEY"] = 40;
var x = new Array(TOTS_PPUNTS);
var y = new Array(TOTS_PPUNTS);
function aquestaFuncioEsFaALiniciDelJocPeroNoLiHeDitInit() {
canvas = document.getElementById('myCanvas');
ctx = canvas.getContext('2d');
h = new Image(); // head
h.src = 'head.png';
b = new Image(); // ball
b.src = 'dot.png';
poma = new Image();
poma.src = 'apple.png';
pps = 3; // punts per serp
for (var z = 0; z < pps; z++) { x[z] = 50 - z * 10; y[z] = 50;}
//LOCATE AAPLE START
var r = Math.floor(Math.random() * MAX_RAND);
poma_x = r * PUNT_MIDA;
r = Math.floor(Math.random() * MAX_RAND);
poma_y = r * PUNT_MIDA;
//LOCATE AAPLE END
setTimeout("gameCycle()", RETARD);
if(true)
return;
for (var z = 0; z < pps; z++) {
x[z] = 666 - z * 6; y[z] = 55;
}
}
function checkpoma() {
if ((x[0] == poma_x) && (y[0] == poma_y)) {
pps++;
//LOCATE AAPLE START
var r = Math.floor(Math.random() * MAX_RAND);
poma_x = r * PUNT_MIDA;
r = Math.floor(Math.random() * MAX_RAND);
poma_y = r * PUNT_MIDA;
//LOCATE AAPLE END
}
}
function endGammeAndShowGameOverMessage() {
ctx.fillStyle = 'white';
ctx.textBaseline = 'middle';
ctx.textAlign = 'center';
ctx.font = 'normal bold 18px serif';
if(pps-3 == 1)
ctx.fillText(pps-3 + " punt - " + 'Game over', C_AMPLE/2, C_ALTURA/2);
else
ctx.fillText(pps-3 + " punts - " + 'Game over', C_AMPLE/2, C_ALTURA/2);
}
function checkpoma() {
if ((x[0] == poma_x) && (y[0] == poma_y)) {
pps++;
//LOCATE AAPLE START
var r = Math.floor(Math.random() * MAX_RAND);
poma_x = r * PUNT_MIDA;
r = Math.floor(Math.random() * MAX_RAND);
poma_y = r * PUNT_MIDA;
//LOCATE AAPLE END
}
}
function startDelayTimeout(functionName) {
setTimeout(functionName,
RETARD);
}
function gameCycle() {
if (inGame) {
checkpoma();
// CHECK COLLISION START
for (var z = pps; z > 0; z--) {
if ((z > 4) && (x[0] == x[z]) && (y[0] == y[z])) {
inGame = false;
}
}
if (y[0] >= C_ALTURA) {
inGame = false;
}
if (y[0] < 0) {
inGame = false;
}
if (x[0] >= C_AMPLE) {
inGame = false;
}
if (x[0] < 0) {
inGame = false;
}
// CHECK COLLISION END
// MOVE START
for (var z = pps; z > 0; z--) {
x[z] = x[(z - 1)];
y[z] = y[(z - 1)];
}
if (esquerre_Direccio) {
x[0] -= PUNT_MIDA;
}
if (dretaDireccio) {
x[0] += PUNT_MIDA;
}
if (amunt_direccio) {
y[0] -= PUNT_MIDA;
}
if (AvallDireccio) {
y[0] += PUNT_MIDA;
}
// MOVE END
/*
// CODI QUE NO FUNCIONA
for (var z = pps-[false]; z > 0; z--) {
x[z] = x[(z - 1)]; y[z] = y[(z - 1)];
}
if (esquerre_Direccio) {
x[0] -= PUNT_MIDA; console.log("esquerre_Direccio")
} if (dretaDireccio) {
x[0] += PUNT_MIDA;
} if (amunt_direccio) {
y[0] -= PUNT_MIDA;
} if (AvallDireccio) {
y[0] += PUNT_MIDA;
}
*/
// DO DRAWING START
ctx.clearRect(0, 0, C_AMPLE, C_ALTURA);
if (inGame) {
ctx.drawImage(poma, poma_x, poma_y);
for (var z = 0; z < pps; z++) {
if (z == 0)
ctx.drawImage(h, x[z], y[z]);
else
ctx.drawImage(b, x[z], y[z]);
}
} else {
endGammeAndShowGameOverMessage();
}
// DO DRAWING END
startDelayTimeout( "gameCycle()");
}
}
onkeydown = function(e) {
if(e.keyCode == 8) return
var key = e.keyCode;
if ((key == KEYBOARD_KEYS["ESQUERRE_KEY"]) && (!dretaDireccio)) {
esquerre_Direccio = true;
amunt_direccio = false;
AvallDireccio = false;
}
if ((key == KEYBOARD_KEYS["DRETA_KEY"]) && (!esquerre_Direccio)) {
dretaDireccio = true;
amunt_direccio = false;
AvallDireccio = false;
console.log("esquerre_Direccio")
}
if ((key == KEYBOARD_KEYS["AMUNT_KEY"]) && (!AvallDireccio)) {
amunt_direccio = true;
dretaDireccio =
false;
esquerre_Direccio = false;
}
if ((key == KEYBOARD_KEYS["AVALL_KEY"]) && (!amunt_direccio)) {
AvallDireccio = true;
dretaDireccio = false;
esquerre_Direccio = false;
}
return
};
</script>
<body onload="aquestaFuncioEsFaALiniciDelJocPeroNoLiHeDitInit();">
<canvas id="myCanvas" width="300" height="300">
</canvas>
</body>
</html>