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maze.html
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<!DOCTYPE html>
<html>
<head>
<title>Speed Vs. Power Tutorial</title>
</head>
<body>
<div style="display: flex;justify-content: center; position: relative;">
<h3 style="position: relative; top: 10px; left: -270px;">Start</h3>
<canvas id="mainPlayer" width="500" height="500" style="border: 1px solid #000; position: absolute;"></canvas>
<canvas id="main" width="500" height="500" style="border: 1px solid #000; position: absolute; opacity: 0.8;"></canvas>
<h3 style="position: relative; bottom: -424px; right: -270px;">End</h3>
</div>
<button id="stopBtn" onclick="stopAnimation()">Stop</button>
<br>
<br>
<button id="" onclick="resetPage()">Reset</button>
<br>
<br>
<button id="" onclick="reloadPage()">Reload</button>
<script>
let s = 100;
let pos = s / 2;
let r = pos / 2;
let deltaX = pos;
let deltaY = pos;
let dx = 1, dy = -1;
let step = 15;
let mapIndex = 0;
let obstacleTypes = ['barrier', 'stone'];
let currentBarrier, mapNode, currentType;
let obstaclesCount = 0, obstaclesCurrentCount = 0;
let obsX, obsY;
let stoneDeduct = 0;
let timeoutTime = 1000, intervalTime = 2000;
let result = false;
let isFast = true;
let direction, moveStone = false;
let c = document.getElementById("main");
let ctx = c.getContext('2d');
let cp = document.getElementById("mainPlayer");
let ctxP = cp.getContext('2d');
let maps = [
[
[0, 1, 1, 1, 1],
[0, 1, 1, 1, 1],
[0, 0, 1, 1, 1],
[1, 0, 0, 1, 1],
[1, 1, 0, 0, 0]
],
[
[0, 1, 1, 1, 1],
[0, 1, 1, 1, 1],
[0, 1, 1, 1, 1],
[0, 1, 1, 1, 1],
[0, 0, 0, 0, 0]
],
[
[0, 1, 1, 1, 1],
[0, 0, 0, 0, 1],
[0, 1, 0, 1, 1],
[1, 1, 0, 0, 1],
[1, 1, 0, 0, 0]
]
];
let map = [];
let mapBorders = [];
let mapPath = [];
let currentObsticale = [];
let keys = [];
function setMap(i){
map = maps[i];
}
function drawMap(m){
mapBorders = [];
mapPath = [];
ctxP.clearRect(0, 0, cp.width, cp.height);
ctxP.beginPath();
for(i = 0; i < m.length; i++){
for(j = 0; j < m[i].length; j++){
if(m[i][j] === 1){
ctxP.fillStyle = "#000000";//walls
mapBorders.push({ x: j*s, y: i*s });
ctxP.fillRect(j*s, i*s, s, s);
}
else{
mapPath.push({ x: j*s, y: i*s });
}
}
}
ctxP.fillStyle = "#00ff00";//destination
ctxP.fillRect((m.length - 1) * s, (m.length - 1) * s, s, s);
ctxP.closePath();
}
function drawPlayer(x, y){
if ((x + dx > c.width - r || x + dx < r && (keys[37] || keys[39]))){
if (keys[37])//left
deltaX = x + step;
else if (keys[39])//right
deltaX = x - step;
x = deltaX;
}
else if ((y + dy > c.height - r || y + dy < r && (keys[38] || keys[40]))){
if (keys[38])//up
deltaY = y + step;
else if (keys[40])//down
deltaY = y - step;
y = deltaY;
}
else if (isBorder(x, y)){
let borderResult = isBorder(x, y);
if (borderResult == 'win' || borderResult == 'Game Over'){
alert(borderResult);
if(mapIndex < maps.length - 1){
reset(borderResult);
}
else{
stopAnimation();
return;
}
}
else if(borderResult){
if(keys[37]){//left
deltaX = x + step;
x = deltaX;
}
else if (keys[39]){//right
deltaX = x - step;
x = deltaX;
}
else if(keys[38]){//up
deltaY = y + step;
y = deltaY;
}
else if (keys[40]){//down
deltaY = y - step;
y = deltaY;
}
}
}
draw(ctxP, x, y, r);
}
function draw(ctx, x, y, r){
ctx.beginPath();
ctx.arc(x, y, r, 0, 2 * Math.PI, true);
ctx.closePath();
ctx.stroke();
}
function isBorder(x, y){
result = false;
if(keys[37])//left
direction = 'left'
else if (keys[39])//right
direction = 'right'
else if(keys[38])//up
direction = 'up'
else if (keys[40])//down
direction = 'down'
if(direction === 'left')
x = x - r;
else if(direction === 'right')
x = x + r;
else if(direction === 'up')
y = y - r;
else if(direction === 'down')
y = y + r;
for(i = 0; i < mapBorders.length; i++){
if(x > mapBorders[i].x && x < mapBorders[i].x + s && y > mapBorders[i].y && y < mapBorders[i].y + s) {
result = true;
}
if(x > (map.length - 1) * s && y > (map.length - 1) * s) {
return 'win';
}
}
let currentObsticaleExists = !(currentObsticale === undefined || currentObsticale.length == 0);
if(!result && currentObsticaleExists){
if(currentObsticale[0].type === 'barrier'){
if ((currentObsticale[0].orint === 'vertical' && x + r > currentObsticale[0].pos.x1 && x - r < currentObsticale[0].pos.x1 && y - r > currentObsticale[0].pos.y1 && y + r < currentObsticale[0].pos.y2) ||
(currentObsticale[0].orint === 'horizontal' && x - r > currentObsticale[0].pos.x1 && x + r < currentObsticale[0].pos.x2 && y - r < currentObsticale[0].pos.y1 && y + r > currentObsticale[0].pos.y2)){
return 'Game Over';
}
}
else if (currentObsticale[0].type === 'stone' && ((x + r > currentObsticale[0].pos.x1 - (r - stoneDeduct) && y + r > currentObsticale[0].pos.y1 - (r - stoneDeduct)) ||
(x - r > currentObsticale[0].pos.x1 + (r - stoneDeduct) && y - r > currentObsticale[0].pos.y1 + (r - stoneDeduct)))){
if(isFast)
return 'Game Over';
else{
moveStone = true;
if(direction === 'left')
currentObsticale[0].pos.x1 -= ((r*2) - stoneDeduct);
else if(direction === 'right')
currentObsticale[0].pos.x1 += ((r*2) - stoneDeduct);
else if(direction === 'up')
currentObsticale[0].pos.y1 -= ((r*2) - stoneDeduct);
else if(direction === 'down')
currentObsticale[0].pos.y1 += ((r*2) - stoneDeduct);
x = currentObsticale[0].pos.x1;
y = currentObsticale[0].pos.y1;
mapNode.x = x;
mapNode.y = y;
//console.log(direction, x, y, currentObsticale, mapNode)
ctx.clearRect(0, 0, c.width, c.height);
draw(ctx, x, y, (r - stoneDeduct));
}
}
}
return result;
}
function drawObsticales(){
if (currentBarrier == undefined)
currentBarrier = isBarrierVertical();
if (mapNode == undefined)
mapNode = mapPath[Math.floor(Math.random() * mapPath.length)];
if (currentType == undefined)
currentType = isBarrierOrStone();
if(obstaclesCount > obstaclesCurrentCount) {
obsX = mapNode.x;
obsY = mapNode.y;
if(currentBarrier == 'vertical'){
if(obsX === 0){
obsX += s;//to move the vertical barrier to the right
obsY = mapPath.find(a => a.x === obsX).y;
if(!obsY)
obsY = mapPath[i].y;
if(obsX === (s * maps[0].length) - s && obsX === obsY)//x: 400, y: 400
obsX -= s;
if(obsY !== (s * maps[0].length) - s /*Y: 100*/&& obsX !== 0 &&
(mapBorders.find(a => a.x === obsX) && obsX == mapBorders.find(a => a.x === obsX).x && mapBorders.find(a => a.y === obsY) && obsY == mapBorders.find(a => a.y === obsY).y) ||
(mapBorders.find(a => a.x + s === obsX) && obsX == mapBorders.find(a => a.x + s === obsX).x && mapBorders.find(a => a.y === obsY) && obsY == mapBorders.find(a => a.y === obsY).y)) {
obsX += s;
}
}
currentObsticale.push({type: currentType/*'barrier'*/, orint: currentBarrier, pos: {x1: obsX, y1: obsY, x2: obsX, y2: obsY + s}});
}
else{
if(obsX === 0 && obsY === 0)
obsY += s;
currentObsticale.push({type: currentType/*'barrier'*/, orint: currentBarrier, pos: {x1: obsX, y1: obsY, x2: obsY, y2: obsY}});
}
if(currentObsticale[0].type == 'barrier'){//barrier
obsX = currentObsticale[0].pos.x1;
obsY = currentObsticale[0].pos.y1;
ctx.moveTo(obsX, obsY);
obsX = currentObsticale[0].pos.x2;
obsY = currentObsticale[0].pos.y2;
ctx.lineTo(obsX, obsY);
}
else{//stone
if(!moveStone){
obsX = currentObsticale[0].pos.x1 + pos;
obsY = currentObsticale[0].pos.y1 + pos;
}
if(obsX === (s * maps[0].length) - s + pos && obsX === obsY)//x: 450, y: 450
obsX -= s;
currentObsticale[0].orint = null;
currentObsticale[0].pos.x1 = obsX;
currentObsticale[0].pos.y1 = obsY;
currentObsticale[0].pos.x2 = null;
currentObsticale[0].pos.y2 = null;
draw(ctx, obsX, obsY, r - stoneDeduct);
}
ctx.stroke();
obstaclesCurrentCount++;
//console.log(currentObsticale, moveStone);
}
}
function randomBool(){
return Math.random() < 0.5;//Math.random() ranges between 0 & 1
}
function isBarrierVertical(){
if(randomBool())
return 'vertical';
else
return 'horizontal';
}
function isBarrierOrStone(){
if(randomBool())
return obstacleTypes[0];
else
return obstacleTypes[1];
}
function reset(result){
deltaX = pos;
deltaY = pos;
drawPlayer(pos, pos);
if(result == 'win'){
mapIndex++;
obstaclesCount++;
}
else{
mapIndex = 0;
obstaclesCount = 0;
}
obstaclesCurrentCount = 0;
currentBarrier = undefined;
mapNode = undefined;
currentType = undefined;
moveStone = false;
setMap(mapIndex);
}
const obsInterval = setInterval(() => {
if(currentType == undefined || currentType !== 'stone'){
currentObsticale = [];
ctx.clearRect(0, 0, c.width, c.height);
obstaclesCurrentCount = 0;
}
setTimeout(() => {
drawObsticales();
}, timeoutTime);
}, intervalTime);
window.addEventListener("keydown", keysPressed, false);
window.addEventListener("keyup", keysReleased, false);
function keysPressed(e) {
for(i = 0; i < keys.length - 1; i++){
keys[i] = false;
}
keys[e.keyCode] = true;
if (keys[37]) {
deltaX -= step;
}
else if (keys[39]) {
deltaX += step;
}
else if (keys[38]) {
deltaY -= step;
}
else if (keys[40]) {
deltaY += step;
}
if (keys[32]){
isFast = !isFast;
if(isFast)
step = 15;
else
step = 5;
}
e.preventDefault();
}
function keysReleased(e) {
keys[e.keyCode] = false;
}
let con = true;
function stopAnimation(){
con = !con;
if(!con){
clearInterval(obsInterval);
}
return con;
}
function reloadPage(){
location.reload();
}
function resetPage() {
reset();
}
function animate() {
//sets all pixels in the rectangle defined by starting point (x, y) and size (width, height) to transparent black, erasing any previously drawn content
ctxP.clearRect(0, 0, cp.width, cp.height);
drawMap(map);
drawPlayer(deltaX, deltaY);
if(currentType === 'stone' && !(currentObsticale === undefined || currentObsticale.length == 0)){
currentObsticale = [];
obstaclesCurrentCount = 0;
}
if (con)
//tells the browser that you wish to perform an animation and requests that the browser call a specified function to update an animation before the next repaint
requestAnimationFrame(animate);
}
animate();
window.onload = function(){
setMap(mapIndex);
drawMap(map);
drawPlayer();
}
</script>
</body>
</html>