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dijkstraAlgorithm.js
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dijkstraAlgorithm.js
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// Dijkstra Algorithm, no animation
function InstantDijkstraAlgorithm() {
console.log(startX + " " + startY);
var Xqueue = [startX];
var Yqueue = [startY];
var pathFound = false;
var xLocation = startX;
var yLocation = startY;
while (Xqueue.length > 0 && !pathFound && !resetFunction) {
xLocation = Xqueue.shift();
yLocation = Yqueue.shift();
console.log(xLocation + " " + yLocation);
if (xLocation > 0 && tiles[xLocation - 1][yLocation].state == 'f') {
pathFound = true;
}
if (xLocation < tileColumnCount - 1 && tiles[xLocation + 1][yLocation].state == 'f') {
pathFound = true;
}
if (yLocation > 0 && tiles[xLocation][yLocation - 1].state == 'f') {
pathFound = true;
}
if (yLocation < tileRowCount - 1 && tiles[xLocation][yLocation + 1].state == 'f') {
pathFound = true;
}
if (xLocation > 0 && tiles[xLocation - 1][yLocation].state == 'e') {
Xqueue.push(xLocation - 1);
Yqueue.push(yLocation);
tiles[xLocation - 1][yLocation].state = tiles[xLocation][yLocation].state + "l";
}
if (xLocation < tileColumnCount - 1 && tiles[xLocation + 1][yLocation].state == 'e') {
Xqueue.push(xLocation + 1);
Yqueue.push(yLocation);
tiles[xLocation + 1][yLocation].state = tiles[xLocation][yLocation].state + "r";
}
if (yLocation > 0 && tiles[xLocation][yLocation - 1].state == 'e') {
Xqueue.push(xLocation);
Yqueue.push(yLocation - 1);
tiles[xLocation][yLocation - 1].state = tiles[xLocation][yLocation].state + "u";
}
if (yLocation < tileRowCount - 1 && tiles[xLocation][yLocation + 1].state == 'e') {
Xqueue.push(xLocation);
Yqueue.push(yLocation + 1);
tiles[xLocation][yLocation + 1].state = tiles[xLocation][yLocation].state + "d";
}
}
if (!pathFound && !resetFunction) {
output.innerHTML = 'No Solution';
} else if (pathFound) {
output.innerHTML = 'Success!';
var path = tiles[xLocation][yLocation].state;
var pathLength = path.length;
var currX = startX;
var currY = startY;
for (var i = 0; i < pathLength - 1; i++) {
if (path.charAt(i+1) == 'u') {
currY -= 1;
}
if (path.charAt(i+1) == 'd') {
currY += 1;
}
if (path.charAt(i+1) == 'r') {
currX += 1;
}
if (path.charAt(i+1) == 'l') {
currX -= 1;
}
tiles[currX][currY].state = 'x';
}
}
}
async function DijkstraAlgorithm(speed) {
console.log(startX + " " + startY);
var Xqueue = [startX];
var Yqueue = [startY];
var pathFound = false;
var xLocation = startX;
var yLocation = startY;
while (Xqueue.length > 0 && !pathFound && !resetFunction) {
xLocation = Xqueue.shift();
yLocation = Yqueue.shift();
if (xLocation > 0 && tiles[xLocation - 1][yLocation].state == 'f') {
pathFound = true;
}
if (xLocation < tileColumnCount - 1 && tiles[xLocation + 1][yLocation].state == 'f') {
pathFound = true;
}
if (yLocation > 0 && tiles[xLocation][yLocation - 1].state == 'f') {
pathFound = true;
}
if (yLocation < tileRowCount - 1 && tiles[xLocation][yLocation + 1].state == 'f') {
pathFound = true;
}
if (xLocation > 0 && tiles[xLocation - 1][yLocation].state == 'e') {
Xqueue.push(xLocation - 1);
Yqueue.push(yLocation);
tiles[xLocation - 1][yLocation].state = tiles[xLocation][yLocation].state + "l";
}
if (xLocation < tileColumnCount - 1 && tiles[xLocation + 1][yLocation].state == 'e') {
Xqueue.push(xLocation + 1);
Yqueue.push(yLocation);
tiles[xLocation + 1][yLocation].state = tiles[xLocation][yLocation].state + "r";
}
if (yLocation > 0 && tiles[xLocation][yLocation - 1].state == 'e') {
Xqueue.push(xLocation);
Yqueue.push(yLocation - 1);
tiles[xLocation][yLocation - 1].state = tiles[xLocation][yLocation].state + "u";
}
if (yLocation < tileRowCount - 1 && tiles[xLocation][yLocation + 1].state == 'e') {
Xqueue.push(xLocation);
Yqueue.push(yLocation + 1);
tiles[xLocation][yLocation + 1].state = tiles[xLocation][yLocation].state + "d";
}
await sleep(speed);
}
if (!pathFound && !resetFunction) {
output.innerHTML = 'No Solution';
} else if (pathFound) {
output.innerHTML = 'Success!';
var path = tiles[xLocation][yLocation].state;
var pathLength = path.length;
var currX = startX;
var currY = startY;
for (var i = 0; i < pathLength - 1; i++) {
if (path.charAt(i+1) == 'u') {
currY -= 1;
}
if (path.charAt(i+1) == 'd') {
currY += 1;
}
if (path.charAt(i+1) == 'r') {
currX += 1;
}
if (path.charAt(i+1) == 'l') {
currX -= 1;
}
tiles[currX][currY].state = 'x';
await sleep(20);
}
}
}