function rand(max) {
return Math.floor(Math.random() * max);
}
function shuffle(a) {
for (let i = a.length - 1; i > 0; i--) {
const j = Math.floor(Math.random() * (i + 1));
[a[i], a[j]] = [a[j], a[i]];
}
return a;
}
function changeBrightness(factor, sprite) {
var virtCanvas = document.createElement("canvas");
virtCanvas.width = 500;
virtCanvas.height = 500;
var context = virtCanvas.getContext("2d");
context.drawImage(sprite, 0, 0, 500, 500);
var imgData = context.getImageData(0, 0, 500, 500);
for (let i = 0; i < imgData.data.length; i += 4) {
imgData.data[i] = imgData.data[i] * factor;
imgData.data[i + 1] = imgData.data[i + 1] * factor;
imgData.data[i + 2] = imgData.data[i + 2] * factor;
}
context.putImageData(imgData, 0, 0);
var spriteOutput = new Image();
spriteOutput.src = virtCanvas.toDataURL();
virtCanvas.remove();
return spriteOutput;
}
function displayVictoryMess(moves) {
document.getElementById("moves").innerHTML = "You Moved " + moves + " Steps.";
toggleVisablity("Message-Container");
}
function toggleVisablity(id) {
if (document.getElementById(id).style.visibility == "visible") {
document.getElementById(id).style.visibility = "hidden";
} else {
document.getElementById(id).style.visibility = "visible";
}
}
function Maze(Width, Height) {
var mazeMap;
var width = Width;
var height = Height;
var startCoord, endCoord;
var dirs = ["n", "s", "e", "w"];
var modDir = {
n: {
y: -1,
x: 0,
o: "s"
},
s: {
y: 1,
x: 0,
o: "n"
},
e: {
y: 0,
x: 1,
o: "w"
},
w: {
y: 0,
x: -1,
o: "e"
}
};
this.map = function() {
return mazeMap;
};
this.startCoord = function() {
return startCoord;
};
this.endCoord = function() {
return endCoord;
};
function genMap() {
mazeMap = new Array(height);
for (y = 0; y < height; y++) {
mazeMap[y] = new Array(width);
for (x = 0; x < width; ++x) {
mazeMap[y][x] = {
n: false,
s: false,
e: false,
w: false,
visited: false,
priorPos: null
};
}
}
}
function defineMaze() {
var isComp = false;
var move = false;
var cellsVisited = 1;
var numLoops = 0;
var maxLoops = 0;
var pos = {
x: 0,
y: 0
};
var numCells = width * height;
while (!isComp) {
move = false;
mazeMap[pos.x][pos.y].visited = true;
if (numLoops >= maxLoops) {
shuffle(dirs);
maxLoops = Math.round(rand(height / 8));
numLoops = 0;
}
numLoops++;
for (index = 0; index < dirs.length; index++) {
var direction = dirs[index];
var nx = pos.x + modDir[direction].x;
var ny = pos.y + modDir[direction].y;
if (nx >= 0 && nx < width && ny >= 0 && ny < height) {
//Check if the tile is already visited
if (!mazeMap[nx][ny].visited) {
//Carve through walls from this tile to next
mazeMap[pos.x][pos.y][direction] = true;
mazeMap[nx][ny][modDir[direction].o] = true;
//Set Currentcell as next cells Prior visited
mazeMap[nx][ny].priorPos = pos;
//Update Cell position to newly visited location
pos = {
x: nx,
y: ny
};
cellsVisited++;
//Recursively call this method on the next tile
move = true;
break;
}
}
}
if (!move) {
// If it failed to find a direction,
// move the current position back to the prior cell and Recall the method.
pos = mazeMap[pos.x][pos.y].priorPos;
}
if (numCells == cellsVisited) {
isComp = true;
}
}
}
function defineStartEnd() {
switch (rand(4)) {
case 0:
startCoord = {
x: 0,
y: 0
};
endCoord = {
x: height - 1,
y: width - 1
};
break;
case 1:
startCoord = {
x: 0,
y: width - 1
};
endCoord = {
x: height - 1,
y: 0
};
break;
case 2:
startCoord = {
x: height - 1,
y: 0
};
endCoord = {
x: 0,
y: width - 1
};
break;
case 3:
startCoord = {
x: height - 1,
y: width - 1
};
endCoord = {
x: 0,
y: 0
};
break;
}
}
genMap();
defineStartEnd();
defineMaze();
}
function DrawMaze(Maze, ctx, cellsize, endSprite = null) {
var map = Maze.map();
var cellSize = cellsize;
var drawEndMethod;
ctx.lineWidth = cellSize / 40;
this.redrawMaze = function(size) {
cellSize = size;
ctx.lineWidth = cellSize / 50;
drawMap();
drawEndMethod();
};
function drawCell(xCord, yCord, cell) {
var x = xCord * cellSize;
var y = yCord * cellSize;
if (cell.n == false) {
ctx.beginPath();
ctx.moveTo(x, y);
ctx.lineTo(x + cellSize, y);
ctx.stroke();
}
if (cell.s === false) {
ctx.beginPath();
ctx.moveTo(x, y + cellSize);
ctx.lineTo(x + cellSize, y + cellSize);
ctx.stroke();
}
if (cell.e === false) {
ctx.beginPath();
ctx.moveTo(x + cellSize, y);
ctx.lineTo(x + cellSize, y + cellSize);
ctx.stroke();
}
if (cell.w === false) {
ctx.beginPath();
ctx.moveTo(x, y);
ctx.lineTo(x, y + cellSize);
ctx.stroke();
}
}
function drawMap() {
for (x = 0; x < map.length; x++) {
for (y = 0; y < map[x].length; y++) {
drawCell(x, y, map[x][y]);
}
}
}
function drawEndFlag() {
var coord = Maze.endCoord();
var gridSize = 4;
var fraction = cellSize / gridSize - 2;
var colorSwap = true;
for (let y = 0; y < gridSize; y++) {
if (gridSize % 2 == 0) {
colorSwap = !colorSwap;
}
for (let x = 0; x < gridSize; x++) {
ctx.beginPath();
ctx.rect(
coord.x * cellSize + x * fraction + 4.5,
coord.y * cellSize + y * fraction + 4.5,
fraction,
fraction
);
if (colorSwap) {
ctx.fillStyle = "rgba(0, 0, 0, 0.8)";
} else {
ctx.fillStyle = "rgba(255, 255, 255, 0.8)";
}
ctx.fill();
colorSwap = !colorSwap;
}
}
}
function drawEndSprite() {
var offsetLeft = cellSize / 50;
var offsetRight = cellSize / 25;
var coord = Maze.endCoord();
ctx.drawImage(
endSprite,
2,
2,
endSprite.width,
endSprite.height,
coord.x * cellSize + offsetLeft,
coord.y * cellSize + offsetLeft,
cellSize - offsetRight,
cellSize - offsetRight
);
}
function clear() {
var canvasSize = cellSize * map.length;
ctx.clearRect(0, 0, canvasSize, canvasSize);
}
if (endSprite != null) {
drawEndMethod = drawEndSprite;
} else {
drawEndMethod = drawEndFlag;
}
clear();
drawMap();
drawEndMethod();
}
function Player(maze, c, _cellsize, onComplete, sprite = null) {
var ctx = c.getContext("2d");
var drawSprite;
var moves = 0;
drawSprite = drawSpriteCircle;
if (sprite != null) {
drawSprite = drawSpriteImg;
}
var player = this;
var map = maze.map();
var cellCoords = {
x: maze.startCoord().x,
y: maze.startCoord().y
};
var cellSize = _cellsize;
var halfCellSize = cellSize / 2;
this.redrawPlayer = function(_cellsize) {
cellSize = _cellsize;
drawSpriteImg(cellCoords);
};
function drawSpriteCircle(coord) {
ctx.beginPath();
ctx.fillStyle = "yellow";
ctx.arc(
(coord.x + 1) * cellSize - halfCellSize,
(coord.y + 1) * cellSize - halfCellSize,
halfCellSize - 2,
0,
2 * Math.PI
);
ctx.fill();
if (coord.x === maze.endCoord().x && coord.y === maze.endCoord().y) {
onComplete(moves);
player.unbindKeyDown();
}
}
function drawSpriteImg(coord) {
var offsetLeft = cellSize / 50;
var offsetRight = cellSize / 25;
ctx.drawImage(
sprite,
0,
0,
sprite.width,
sprite.height,
coord.x * cellSize + offsetLeft,
coord.y * cellSize + offsetLeft,
cellSize - offsetRight,
cellSize - offsetRight
);
if (coord.x === maze.endCoord().x && coord.y === maze.endCoord().y) {
onComplete(moves);
player.unbindKeyDown();
}
}
function removeSprite(coord) {
var offsetLeft = cellSize / 50;
var offsetRight = cellSize / 25;
ctx.clearRect(
coord.x * cellSize + offsetLeft,
coord.y * cellSize + offsetLeft,
cellSize - offsetRight,
cellSize - offsetRight
);
}
function check(e) {
var cell = map[cellCoords.x][cellCoords.y];
moves++;
switch (e.keyCode) {
case 65:
case 37: // west
if (cell.w == true) {
removeSprite(cellCoords);
cellCoords = {
x: cellCoords.x - 1,
y: cellCoords.y
};
drawSprite(cellCoords);
}
break;
case 87:
case 38: // north
if (cell.n == true) {
removeSprite(cellCoords);
cellCoords = {
x: cellCoords.x,
y: cellCoords.y - 1
};
drawSprite(cellCoords);
}
break;
case 68:
case 39: // east
if (cell.e == true) {
removeSprite(cellCoords);
cellCoords = {
x: cellCoords.x + 1,
y: cellCoords.y
};
drawSprite(cellCoords);
}
break;
case 83:
case 40: // south
if (cell.s == true) {
removeSprite(cellCoords);
cellCoords = {
x: cellCoords.x,
y: cellCoords.y + 1
};
drawSprite(cellCoords);
}
break;
}
}
this.bindKeyDown = function() {
window.addEventListener("keydown", check, false);
$("#view").swipe({
swipe: function(
event,
direction,
distance,
duration,
fingerCount,
fingerData
) {
console.log(direction);
switch (direction) {
case "up":
check({
keyCode: 38
});
break;
case "down":
check({
keyCode: 40
});
break;
case "left":
check({
keyCode: 37
});
break;
case "right":
check({
keyCode: 39
});
break;
}
},
threshold: 0
});
};
this.unbindKeyDown = function() {
window.removeEventListener("keydown", check, false);
$("#view").swipe("destroy");
};
drawSprite(maze.startCoord());
this.bindKeyDown();
}
var mazeCanvas = document.getElementById("mazeCanvas");
var ctx = mazeCanvas.getContext("2d");
var sprite;
var finishSprite;
var maze, draw, player;
var cellSize;
var difficulty;
// sprite.src = 'media/sprite.png';
window.onload = function() {
let viewWidth = $("#view").width();
let viewHeight = $("#view").height();
if (viewHeight < viewWidth) {
ctx.canvas.width = viewHeight - viewHeight / 100;
ctx.canvas.height = viewHeight - viewHeight / 100;
} else {
ctx.canvas.width = viewWidth - viewWidth / 100;
ctx.canvas.height = viewWidth - viewWidth / 100;
}
//Load and edit sprites
var completeOne = false;
var completeTwo = false;
var isComplete = () => {
if(completeOne === true && completeTwo === true)
{
console.log("Runs");
setTimeout(function(){
makeMaze();
}, 500);
}
};
sprite = new Image();
sprite.src =
"https://image.ibb.co/dr1HZy/Pf_RWr3_X_Imgur.png" +
"?" +
new Date().getTime();
sprite.setAttribute("crossOrigin", " ");
sprite.onload = function() {
sprite = changeBrightness(1.2, sprite);
completeOne = true;
console.log(completeOne);
isComplete();
};
finishSprite = new Image();
finishSprite.src = "https://image.ibb.co/b9wqnJ/i_Q7m_U25_Imgur.png"+
"?" +
new Date().getTime();
finishSprite.setAttribute("crossOrigin", " ");
finishSprite.onload = function() {
finishSprite = changeBrightness(1.1, finishSprite);
completeTwo = true;
console.log(completeTwo);
isComplete();
};
};
window.onresize = function() {
let viewWidth = $("#view").width();
let viewHeight = $("#view").height();
if (viewHeight < viewWidth) {
ctx.canvas.width = viewHeight - viewHeight / 100;
ctx.canvas.height = viewHeight - viewHeight / 100;
} else {
ctx.canvas.width = viewWidth - viewWidth / 100;
ctx.canvas.height = viewWidth - viewWidth / 100;
}
cellSize = mazeCanvas.width / difficulty;
if (player != null) {
draw.redrawMaze(cellSize);
player.redrawPlayer(cellSize);
}
};
function makeMaze() {
//document.getElementById("mazeCanvas").classList.add("border");
if (player != undefined) {
player.unbindKeyDown();
player = null;
}
var e = document.getElementById("diffSelect");
difficulty = e.options[e.selectedIndex].value;
cellSize = mazeCanvas.width / difficulty;
maze = new Maze(difficulty, difficulty);
draw = new DrawMaze(maze, ctx, cellSize, finishSprite);
player = new Player(maze, mazeCanvas, cellSize, displayVictoryMess, sprite);
if (document.getElementById("mazeContainer").style.opacity < "100") {
document.getElementById("mazeContainer").style.opacity = "100";
}
}