// Cloned by Sharmistha on 6 Nov 2021 from World "Complex World" by Starter user
// Please leave this clone trail here.
//Assignment 1 : World 1 Student No: 21263197
// ==== Starter World =================================================================================================
// This code is designed for use on the Ancient Brain site.
// This code may be freely copied and edited by anyone on the Ancient Brain site.
// To include a working run of this program on another site, see the "Embed code" links provided on Ancient Brain.
// ====================================================================================================================
// =============================================================================================
// More complex starter World
// 3d-effect Maze World (really a 2-D problem)
// Movement is on a semi-visible grid of squares
//
// This more complex World shows:
// - Skybox
// - Internal maze (randomly drawn each time)
// - Enemy actively chases agent
// - Music/audio
// - 2D world (clone this and set show3d = false)
// - User keyboard control (clone this and comment out Mind actions to see)
// =============================================================================================
// =============================================================================================
// Scoring:
// Bad steps = steps where enemy is within one step of agent.
// Good steps = steps where enemy is further away.
// Score = good steps as percentage of all steps.
//
// There are situations where agent is trapped and cannot move.
// If this happens, you score zero.
// =============================================================================================
// ===================================================================================================================
// === Start of tweaker's box ========================================================================================
// ===================================================================================================================
// The easiest things to modify are in this box.
// You should be able to change things in this box without being a JavaScript programmer.
// Go ahead and change some of these. What's the worst that could happen?
AB.clockTick = 100;
// Speed of run: Step every n milliseconds. Default 100.
AB.maxSteps = 1000;
// Length of run: Maximum length of run in steps. Default 1000.
AB.screenshotStep = 50;
// Take screenshot on this step. (All resources should have finished loading.) Default 50.
//---- global constants: -------------------------------------------------------
const show3d = true; // Switch between 3d and 2d view (both using Three.js)
//SS - Changing the cosmetic style
const TEXTURE_WALL = '/uploads/ssawant/gwall.jpg';
const TEXTURE_MAZE = '/uploads/ssawant/p1.jpg';
const TEXTURE_AGENT = '/uploads/ssawant/alien1.jpg';
const TEXTURE_ENEMY = '/uploads/ssawant/ufo1.jpg';
const TEXTURE_BULLET = '/uploads/ssawant/BULLET.jpg'; //My code for path image
// credits:
// http://commons.wikimedia.org/wiki/File:Old_door_handles.jpg
// https://commons.wikimedia.org/wiki/Category:Pac-Man_icons
// https://commons.wikimedia.org/wiki/Category:Skull_and_crossbone_icons
// http://en.wikipedia.org/wiki/File:Inscription_displaying_apices_(from_the_shrine_of_the_Augustales_at_Herculaneum).jpg
//SS - Changed the music
// const MUSIC_BACK = '/uploads/ssawant/gun.wav' ;
const SOUND_ALARM = '/uploads/ssawant/explosion.wav';
// credits:
// http://www.dl-sounds.com/royalty-free/defense-line/
// http://soundbible.com/1542-Air-Horn.html
//SS - changing grid size to 50
const gridsize = 50; // number of squares along side of world
//SS - Changing density to no of squares divide by 3
const NOBOXES = Math.trunc((gridsize * gridsize) / 3);
// density of maze - number of internal boxes
// (bug) use trunc or can get a non-integer
const squaresize = 100; // size of square in pixels
const MAXPOS = gridsize * squaresize; // length of one side in pixels
const SKYCOLOR = 0xddffdd; // a number, not a string
const startRadiusConst = MAXPOS * 0.8; // distance from centre to start the camera at
const maxRadiusConst = MAXPOS * 10; // maximum distance from camera we will render things
//--- change ABWorld defaults: -------------------------------
ABHandler.MAXCAMERAPOS = maxRadiusConst;
ABHandler.GROUNDZERO = true; // "ground" exists at altitude zero
//--- skybox: -------------------------------
// skybox is a collection of 6 files
// x,y,z positive and negative faces have to be in certain order in the array
// https://threejs.org/docs/#api/en/loaders/CubeTextureLoader
// mountain skybox, credit:
// http://stemkoski.github.io/Three.js/Skybox.html
//SS - Uploading and using different skybox images
const SKYBOX_ARRAY = [
"/uploads/ssawant/skybox_left.png",
"/uploads/ssawant/skybox_right.png",
"/uploads/ssawant/skybox_up.png",
"/uploads/ssawant/skybox_down.png",
"/uploads/ssawant/skybox_front.png",
"/uploads/ssawant/skybox_back.png"
];
// space skybox, credit:
// http://en.spaceengine.org/forum/21-514-1
// x,y,z labelled differently
/*
const SKYBOX_ARRAY = [
"/uploads/starter/sky_pos_z.jpg",
"/uploads/starter/sky_neg_z.jpg",
"/uploads/starter/sky_pos_y.jpg",
"/uploads/starter/sky_neg_y.jpg",
"/uploads/starter/sky_pos_x.jpg",
"/uploads/starter/sky_neg_x.jpg"
];
*/
// urban photographic skyboxes, credit:
// http://opengameart.org/content/urban-skyboxes
/*
const SKYBOX_ARRAY = [
"/uploads/starter/posx.jpg",
"/uploads/starter/negx.jpg",
"/uploads/starter/posy.jpg",
"/uploads/starter/negy.jpg",
"/uploads/starter/posz.jpg",
"/uploads/starter/negz.jpg"
];
*/
// ===================================================================================================================
// === End of tweaker's box ==========================================================================================
// ===================================================================================================================
// You will need to be some sort of JavaScript programmer to change things below the tweaker's box.
//--- Mind can pick one of these actions -----------------
const ACTION_LEFT = 0;
const ACTION_RIGHT = 1;
const ACTION_UP = 2;
const ACTION_DOWN = 3;
const ACTION_STAYSTILL = 4;
// in initial view, (smaller-larger) on i axis is aligned with (left-right)
// in initial view, (smaller-larger) on j axis is aligned with (away from you - towards you)
// contents of a grid square
const GRID_BLANK = 0;
const GRID_WALL = 1;
const GRID_MAZE = 2;
var BOXHEIGHT; // 3d or 2d box height
var GRID = new Array(gridsize); // can query GRID about whether squares are occupied, will in fact be initialised as a 2D array
var theagent, theenemy;
var wall_texture, agent_texture, enemy_texture, maze_texture, bullet_texture;
// enemy and agent position on squares
var ei, ej, ai, aj;
var badsteps;
var goodsteps;
var start;
var end;
// SS - adding extra variables
var starArray = [];
var openSet = [];
var closedSet = [];
var path = [];
var line;
var cols = gridsize;
var rows = gridsize;
// 2D array
var grid = new Array(cols);
const diagonal = true;
function loadResources() // asynchronous file loads - call initScene() when all finished
{
var loader1 = new THREE.TextureLoader();
var loader2 = new THREE.TextureLoader();
var loader3 = new THREE.TextureLoader();
var loader4 = new THREE.TextureLoader();
var loader5 = new THREE.TextureLoader(); //SS - for Path
loader1.load(TEXTURE_WALL, function(thetexture) {
thetexture.minFilter = THREE.LinearFilter;
wall_texture = thetexture;
if (asynchFinished()) initScene(); // if all file loads have returned
});
loader2.load(TEXTURE_AGENT, function(thetexture) {
thetexture.minFilter = THREE.LinearFilter;
agent_texture = thetexture;
if (asynchFinished()) initScene();
});
loader3.load(TEXTURE_ENEMY, function(thetexture) {
thetexture.minFilter = THREE.LinearFilter;
enemy_texture = thetexture;
if (asynchFinished()) initScene();
});
loader4.load(TEXTURE_MAZE, function(thetexture) {
thetexture.minFilter = THREE.LinearFilter;
maze_texture = thetexture;
if (asynchFinished()) initScene();
});
//SS - for Path
loader5.load(TEXTURE_BULLET, function(thetexture) {
thetexture.minFilter = THREE.LinearFilter;
bullet_texture = thetexture;
if (asynchFinished()) initScene();
});
}
function asynchFinished() // all file loads returned
{
if (wall_texture && agent_texture && enemy_texture && maze_texture && bullet_texture) return true;
else return false;
}
//--- grid system -------------------------------------------------------------------------------
// my numbering is 0 to gridsize-1
function occupied(i, j) // is this square occupied
{
if ((ei == i) && (ej == j)) return true; // variable objects
if ((ai == i) && (aj == j)) return true;
if (GRID[i][j] == GRID_WALL) return true; // fixed objects
if (GRID[i][j] == GRID_MAZE) return true;
return false;
}
// translate my (i,j) grid coordinates to three.js (x,y,z) coordinates
// logically, coordinates are: y=0, x and z all positive (no negative)
// logically my dimensions are all positive 0 to MAXPOS
// to centre everything on origin, subtract (MAXPOS/2) from all dimensions
function translate(i, j) {
var v = new THREE.Vector3();
v.y = 0;
v.x = (i * squaresize) - (MAXPOS / 2);
v.z = (j * squaresize) - (MAXPOS / 2);
return v;
}
//=== heuristic ===========================
// this must be always optimistic - real time will be this or longer
//SS code
function heuristic(a, b) {
if (diagonal)
{
return (distanceVector(a, b));
}
// 2D distance
// dist is a P5 function
else
{
return (abs(a.i - b.i) + abs(a.j - b.j));
}
// else not diagonal, can only go across and down
// so this is optimistic
// note this is not optimistic if we can do diagonal move
}
//SS - to calculate distance
function distanceVector(a, b) {
var dx = a.i - b.i;
var dy = a.j - b.j;
var dist= Math.sqrt(dx * dx + dy * dy);
return(dist);
}
// Function to delete element from the array
function removeFromArray(arr, elt) {
// Could use indexOf here instead to be more efficient
for (var i = arr.length - 1; i >= 0; i--)
if (arr[i] == elt)
arr.splice(i, 1);
}
//SS code for Spot
// An object to describe a spot in the grid
function Spot(i, j) {
// Location
this.i = i;
this.j = j;
// f, g, and h values for A*
this.f = 0;
this.g = 0;
this.h = 0;
// Neighbors
this.neighbors = [];
// Where did I come from?
this.previous = undefined;
// Figure out who my neighbors are
this.addNeighbors = function(grid) {
var i = this.i;
var j = this.j;
if (i < cols - 1) this.neighbors.push(grid[i + 1][j]);
if (i > 0) this.neighbors.push(grid[i - 1][j]);
if (j < rows - 1) this.neighbors.push(grid[i][j + 1]);
if (j > 0) this.neighbors.push(grid[i][j - 1]);
if (diagonal)
// diagonals are also neighbours:
{
if (i > 0 && j > 0) this.neighbors.push(grid[i - 1][j - 1]);
if (i < cols - 1 && j > 0) this.neighbors.push(grid[i + 1][j - 1]);
if (i > 0 && j < rows - 1) this.neighbors.push(grid[i - 1][j + 1]);
if (i < cols - 1 && j < rows - 1) this.neighbors.push(grid[i + 1][j + 1]);
}
}
} //---- End of function Spot
function initScene() // all file loads have returned
{
var i, j, shape, thecube;
// set up GRID as 2D array
for (i = 0; i < gridsize; i++)
GRID[i] = new Array(gridsize);
// set up walls
for (i = 0; i < gridsize; i++)
for (j = 0; j < gridsize; j++)
if ((i == 0) || (i == gridsize - 1) || (j == 0) || (j == gridsize - 1)) {
GRID[i][j] = GRID_WALL;
shape = new THREE.BoxGeometry(squaresize, BOXHEIGHT, squaresize);
thecube = new THREE.Mesh(shape);
thecube.material = new THREE.MeshBasicMaterial({
map: wall_texture
});
thecube.position.copy(translate(i, j)); // translate my (i,j) grid coordinates to three.js (x,y,z) coordinates
ABWorld.scene.add(thecube);
}
else
GRID[i][j] = GRID_BLANK;
// set up maze
for (var c = 1; c <= NOBOXES; c++) {
i = AB.randomIntAtoB(1, gridsize - 2); // inner squares are 1 to gridsize-2
j = AB.randomIntAtoB(1, gridsize - 2);
GRID[i][j] = GRID_MAZE;
shape = new THREE.BoxGeometry(squaresize, BOXHEIGHT, squaresize);
thecube = new THREE.Mesh(shape);
thecube.material = new THREE.MeshBasicMaterial({
map: maze_texture
});
thecube.position.copy(translate(i, j)); // translate my (i,j) grid coordinates to three.js (x,y,z) coordinates
ABWorld.scene.add(thecube);
}
// set up enemy
// start in random location
do {
i = AB.randomIntAtoB(1, gridsize - 2);
j = AB.randomIntAtoB(1, gridsize - 2);
}
while (occupied(i, j)); // search for empty square
ei = i;
ej = j;
shape = new THREE.BoxGeometry(squaresize, BOXHEIGHT, squaresize);
theenemy = new THREE.Mesh(shape);
theenemy.material = new THREE.MeshBasicMaterial({
map: enemy_texture
});
ABWorld.scene.add(theenemy);
drawEnemy();
// set up agent
// start in random location
do {
i = AB.randomIntAtoB(1, gridsize - 2);
j = AB.randomIntAtoB(1, gridsize - 2);
}
while (occupied(i, j)); // search for empty square
ai = i;
aj = j;
shape = new THREE.BoxGeometry(squaresize, BOXHEIGHT, squaresize);
theagent = new THREE.Mesh(shape);
theagent.material = new THREE.MeshBasicMaterial({
map: agent_texture
});
ABWorld.scene.add(theagent);
drawAgent();
// finally skybox
// setting up skybox is simple
// just pass it array of 6 URLs and it does the asych load
ABWorld.scene.background = new THREE.CubeTextureLoader().load(SKYBOX_ARRAY, function() {
ABWorld.render();
AB.removeLoading();
AB.runReady = true; // start the run loop
});
}
// --- draw moving objects -----------------------------------
function drawEnemy() // given ei, ej, draw it
{
theenemy.position.copy(translate(ei, ej)); // translate my (i,j) grid coordinates to three.js (x,y,z) coordinates
ABWorld.lookat.copy(theenemy.position); // if camera moving, look back at where the enemy is
}
function drawPath()
{
if(line)
ABWorld.scene.remove(line);
const material = new THREE.LineBasicMaterial({
color: '#00FF00', linewidth: 1000
});
var points = []
console.log("Drawing path");
for (var i = 0; i < path.length - 1; i++)
{
points.push(translate(path[i].i, path[i].j));
}
const geometry = new THREE.BufferGeometry().setFromPoints( points );
line = new THREE.Line( geometry, material );
//console.log("line: " +line)
ABWorld.scene.add( line );
}
function drawAgent() // given ai, aj, draw it
{
theagent.position.copy(translate(ai, aj)); // translate my (i,j) grid coordinates to three.js (x,y,z) coordinates
ABWorld.follow.copy(theagent.position); // follow vector = agent position (for camera following agent)
}
//SS code for A*
function astarsearch() {
openSet = [];
closedSet = [];
path = [];
start = grid[ei][ej];
end = grid[ai][aj];
openSet.push(start);
var flag;
while (true) {
// --- begin still searching -----------------------------
if (openSet.length > 0) {
// Best next option
var winner = 0;
for (var i = 0; i < openSet.length; i++)
if (openSet[i].f < openSet[winner].f)
winner = i;
var current = openSet[winner];
// Did I finish?
//change in condition
if (heuristic(current, end) == 1) {
flag = current;
console.log("success - found path");
break;
}
// Best option moves from openSet to closedSet
removeFromArray(openSet, current);
closedSet.push(current);
// Check all the neighbors
var neighbors = current.neighbors;
//--- start of for loop -----------
for (i = 0; i < neighbors.length; i++) {
var neighbor = neighbors[i];
// Valid next spot?
//SS change in if condition for occupied neighbors
if (!closedSet.includes(neighbor) && !occupied(neighbor.i, neighbor.j)) {
var tempG = current.g + heuristic(neighbor, current);
// Is this a better path than before?
var newPath = false;
if (openSet.includes(neighbor)) {
if (tempG < neighbor.g) {
neighbor.g = tempG;
newPath = true;
}
} else {
neighbor.g = tempG;
newPath = true;
openSet.push(neighbor);
}
// Yes, it's a better path
if (newPath) {
neighbor.h = heuristic(neighbor, end);
neighbor.f = neighbor.g + neighbor.h;
neighbor.previous = current;
}
}
}
//--- end of for loop -----------
}
// --- end still searching -----------------------------
else {
console.log('fail - no path exists');
break;
}
} //--- End of while loop
var temp = flag;
path.push(temp);
while (temp.previous) {
path.push(temp.previous);
temp = temp.previous;
}
//drawPath();
}
//SS code to remove path
/*
function removePath() {
console.log("Removing path");
console.log("starArray " + starArray);
for (i = 0; i < starArray.length; i++) {
var t = starArray[i];
const u = ABWorld.scene.getObjectByProperty("uuid", t);
ABWorld.scene.remove(u)
}
}
*/
// --- take actions -----------------------------------
function moveLogicalEnemy() {
// move towards agent
// put some randomness in so it won't get stuck with barriers
//SS - calling astarsearch for its path
astarsearch();
drawPath();
if (path)
{
var x = path.length;
var y = path[x - 2];
if (!occupied(y.i, y.j)) {
ei = y.i;
ej = y.j;
}
}
else
{
var i, j;
if (ei < ai) i = AB.randomIntAtoB(ei, ei + 1);
if (ei == ai) i = ei;
if (ei > ai) i = AB.randomIntAtoB(ei - 1, ei);
if (ej < aj) j = AB.randomIntAtoB(ej, ej + 1);
if (ej == aj) j = ej;
if (ej > aj) j = AB.randomIntAtoB(ej - 1, ej);
if (!occupied(i, j)) // if no obstacle then move, else just miss a turn
{
ei = i;
ej = j;
}
}
}
function moveLogicalAgent(a) // this is called by the infrastructure that gets action a from the Mind
{
var i = ai;
var j = aj;
if (a == ACTION_LEFT) i--;
else if (a == ACTION_RIGHT) i++;
else if (a == ACTION_UP) j++;
else if (a == ACTION_DOWN) j--;
if (!occupied(i, j)) {
ai = i;
aj = j;
}
}
// --- key handling --------------------------------------------------------------------------------------
// This is hard to see while the Mind is also moving the agent:
// AB.mind.getAction() and AB.world.takeAction() are constantly running in a loop at the same time
// have to turn off Mind actions to really see user key control
// we will handle these keys:
var OURKEYS = [37, 38, 39, 40];
function ourKeys(event) {
return (OURKEYS.includes(event.keyCode));
}
function keyHandler(event) {
if (!AB.runReady) return true; // not ready yet
// if not one of our special keys, send it to default key handling:
if (!ourKeys(event)) return true;
// else handle key and prevent default handling:
if (event.keyCode == 37) moveLogicalAgent(ACTION_LEFT);
if (event.keyCode == 38) moveLogicalAgent(ACTION_DOWN);
if (event.keyCode == 39) moveLogicalAgent(ACTION_RIGHT);
if (event.keyCode == 40) moveLogicalAgent(ACTION_UP);
// when the World is embedded in an iframe in a page, we want arrow key events handled by World and not passed up to parent
event.stopPropagation();
event.preventDefault();
return false;
}
// --- score: -----------------------------------
function badstep() // is the enemy within one square of the agent
{
if ((Math.abs(ei - ai) < 2) && (Math.abs(ej - aj) < 2)) return true;
else return false;
}
function agentBlocked() // agent is blocked on all sides, run over
{
return (occupied(ai - 1, aj) &&
occupied(ai + 1, aj) &&
occupied(ai, aj + 1) &&
occupied(ai, aj - 1));
}
function updateStatusBefore(a)
// this is called before anyone has moved on this step, agent has just proposed an action
// update status to show old state and proposed move
{
var x = AB.world.getState();
AB.msg(" Step: " + AB.step + " x = (" + x.toString() + ") a = (" + a + ") ");
}
function updateStatusAfter() // agent and enemy have moved, can calculate score
{
// new state after both have moved
var y = AB.world.getState();
var score = (goodsteps / AB.step) * 100;
AB.msg(" y = (" + y.toString() + ") <br>" +
" Bad steps: " + badsteps +
" Good steps: " + goodsteps +
" Score: " + score.toFixed(2) + "% ", 2);
}
AB.world.newRun = function() {
AB.loadingScreen();
AB.runReady = false;
badsteps = 0;
goodsteps = 0;
if (show3d) {
BOXHEIGHT = squaresize;
ABWorld.init3d(startRadiusConst, maxRadiusConst, SKYCOLOR);
} else {
BOXHEIGHT = 1;
ABWorld.init2d(startRadiusConst, maxRadiusConst, SKYCOLOR);
}
loadResources(); // aynch file loads
// calls initScene() when it returns
document.onkeydown = keyHandler;
};
AB.world.getState = function() {
var x = [ai, aj, ei, ej];
return (x);
};
AB.world.takeAction = function(a) {
//SS code for grid, spot,neighbour
// Making a 2D array
for (i = 0; i < cols; i++)
grid[i] = new Array(rows);
for (i = 0; i < cols; i++)
for (j = 0; j < rows; j++)
grid[i][j] = new Spot(i, j);
// All the neighbors
for (i = 0; i < cols; i++)
for (j = 0; j < rows; j++)
grid[i][j].addNeighbors(grid);
updateStatusBefore(a); // show status line before moves
moveLogicalAgent(a);
if ((AB.step % 2) == 0) // slow the enemy down to every nth step
moveLogicalEnemy();
if (badstep()) badsteps++;
else goodsteps++;
drawAgent();
drawEnemy();
updateStatusAfter(); // show status line after moves
if (agentBlocked()) // if agent blocked in, run over
{
AB.abortRun = true;
goodsteps = 0; // you score zero as far as database is concerned
//musicPause();
soundAlarm();
}
};
AB.world.endRun = function() {
//musicPause();
if (AB.abortRun) AB.msg(" <br> <font color=red> <B> Agent trapped. Final score zero. </B> </font> ", 3);
else AB.msg(" <br> <font color=green> <B> Run over. </B> </font> ", 3);
};
AB.world.getScore = function() {
// only called at end - do not use AB.step because it may have just incremented past AB.maxSteps
var s = (goodsteps / AB.maxSteps) * 100; // float like 93.4372778
var x = Math.round(s * 100); // 9344
return (x / 100); // 93.44
};
// --- music and sound effects ----------------------------------------
/*
var backmusic = AB.backgroundMusic ( MUSIC_BACK );
function musicPlay() { backmusic.play(); }
function musicPause() { backmusic.pause(); }
*/
function soundAlarm() {
var alarm = new Audio(SOUND_ALARM);
alarm.play(); // play once, no loop
}