// Cloned by Dheeraj Putta on 3 Nov 2020 from World "Complex World" by Starter user
// Please leave this clone trail here.
// ==== 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 = 20; // 20
// 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)
const TEXTURE_WALL = '/uploads/starter/door.jpg';
const TEXTURE_MAZE = '/uploads/starter/latin.jpg';
const TEXTURE_AGENT = '/uploads/starter/pacman.jpg';
const TEXTURE_ENEMY = '/uploads/djputta/ghost.png';
// 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
const MUSIC_BACK = '/uploads/starter/Defense.Line.mp3';
const SOUND_ALARM = '/uploads/starter/air.horn.mp3';
// credits:
// http://www.dl-sounds.com/royalty-free/defense-line/
// http://soundbible.com/1542-Air-Horn.html
const gridsize = 50; // number of squares along side of world
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
// const SKYBOX_ARRAY = [
// "/uploads/starter/dawnmountain-xpos.png",
// "/uploads/starter/dawnmountain-xneg.png",
// "/uploads/starter/dawnmountain-ypos.png",
// "/uploads/starter/dawnmountain-yneg.png",
// "/uploads/starter/dawnmountain-zpos.png",
// "/uploads/starter/dawnmountain-zneg.png"
// ];
// moon skybox, credit:
// https://opengameart.org/content/spacemoon-skybox
const SKYBOX_ARRAY = [
"/uploads/djputta/indigo_bk.jpg",
"/uploads/djputta/indigo_ft.jpg",
"/uploads/djputta/indigo_up.jpg",
"/uploads/djputta/indigo_dn.jpg",
"/uploads/djputta/indigo_lf.jpg",
"/uploads/djputta/indigo_rt.jpg"
];
// 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;
const diagonal = false;
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;
// enemy and agent position on squares
var ei, ej, ai, aj;
var badsteps;
var goodsteps;
// #### Created code ####
var agentLastVisited = [0, 0];
var agentStuck = 0;
// #######################
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();
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();
});
}
function asynchFinished() // all file loads returned
{
if (wall_texture && agent_texture && enemy_texture && maze_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;
// #### Modified code ####
if (GRID[i][j].type == GRID_WALL) return true; // fixed objects
// #### Modified code ####
if (GRID[i][j].type == 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;
}
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] = new Spot(i, j);
GRID[i][j].type = 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 {
// #### Modified code ####
GRID[i][j] = new Spot(i, j);
GRID[i][j].type = 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].type = 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);
}
// #### Created code ####
// Setup neighbors
for (var a = 0; a < gridsize; a++) {
for (var b = 0; b < gridsize; b++) {
GRID[a][b].addNeighbors(GRID);
}
}
//########################
// 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 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)
}
// --- take actions -----------------------------------
function moveLogicalEnemy() {
// move towards agent
// put some randomness in so it won't get stuck with barriers
// 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;
// }
// #### Created code ####
spot = aStar();
ei = spot.i;
ej = spot.j;
// ######################
}
function moveLogicalAgent(a) // this is called by the infrastructure that gets action a from the Mind
{
// #### Created code ####
ai = a.i;
aj = a.j;
// ######################
}
// #### Created code ####
function Spot(i, j) {
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;
this.type = undefined;
this.addNeighbors = function (grid) {
var i = this.i;
var j = this.j;
if (i < gridsize - 1 && !occupied(i + 1, j)) this.neighbors.push(grid[i + 1][j]);
if (i > 0 && !occupied(i - 1, j)) this.neighbors.push(grid[i - 1][j]);
if (j < gridsize - 1 && !occupied(i, j + 1)) this.neighbors.push(grid[i][j + 1]);
if (j > 0 && !occupied(i, j - 1)) this.neighbors.push(grid[i][j - 1]);
if (diagonal) {
if (i > 0 && j > 0 && !occupied(i - 1, j - 1) && !(occupied(i - 1, j) && occupied(i, j - 1))) { // NW
this.neighbors.push(grid[i - 1][j - 1]);
}
if (i < gridsize - 1 && j > 0 && !occupied(i + 1, j - 1) && !(occupied(i + 1, j) && occupied(i, j - 1))) { // SW
this.neighbors.push(grid[i + 1][j - 1]);
}
if (i > 0 && j < gridsize - 1 && !occupied(i - 1, j + 1) && !(occupied(i - 1, j) && occupied(i, j + 1))) { //NE
this.neighbors.push(grid[i - 1][j + 1]);
}
if (i < gridsize - 1 && j < gridsize - 1 && !occupied(i + 1, j + 1) && !(occupied(i + 1, j) && occupied(i, j + 1))) { //SE
this.neighbors.push(grid[i + 1][j + 1]);
}
}
}
this.reset = function () {
this.f = 0;
this.g = 0;
this.h = 0;
this.previous = undefined;
}
}
// #######################################
function heuristic(a, b) {
var x = new THREE.Vector3(a.i, 0, a.j);
var y = new THREE.Vector3(b.i, 0, b.j);
return (x.distanceTo(y));
}
function removeFromArray(arr, elt) {
// Could use indexOf here instead to be more efficient
arr.splice(arr.indexOf(elt), 1);
}
// #### Created code ####
function aStar() {
var openSet = [];
var closedSet = [];
var start = GRID[ei][ej];
var end = GRID[ai][aj];
openSet.push(start);
console.log("Start: ", start)
console.log("End: ", end)
console.log("Reset started")
for (var i = 0; i < gridsize; i++) {
for (var j = 0; j < gridsize; j++) {
GRID[i][j].reset();
}
}
while (openSet.length > 0) {
var winner = 0;
for (i = 0; i < openSet.length; i++) {
if (openSet[i].f < openSet[winner].f) {
winner = i;
}
}
var current = openSet[winner];
if (current === end) {
console.log("success - found path");
break;
}
removeFromArray(openSet, current);
closedSet.push(current);
var neighbors = current.neighbors;
for (i = 0; i < neighbors.length; i++) {
var neighbor = neighbors[i];
if (!closedSet.includes(neighbor)) {
var tempG = current.g + heuristic(neighbor, current);
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);
}
if (newPath) {
neighbor.h = heuristic(neighbor, end);
neighbor.f = neighbor.g + neighbor.h;
neighbor.previous = current;
}
}
}
}
var path = [];
var temp = end;
path.push(temp);
while (temp.previous) {
path.push(temp.previous);
temp = temp.previous;
}
console.log(path)
console.log(path[path.length - 2])
draw(path);
return path[path.length - 2];
}
// #####################################################
// #### Created code ####
function draw(path) {
var points = [];
for (var i = 0; i < path.length; i++) {
points.push(translate(path[i].i, path[i].j));
}
var material = new THREE.LineBasicMaterial({
color: 0xff0000,
linewidth: 1.5
});
var geometry = new THREE.BufferGeometry().setFromPoints(points);
var line = new THREE.Line(geometry, material);
line.name = "astarpath";
ABWorld.scene.add(line);
}
// ########################
// --- 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 + ") ");
// #### Created code ####
ABWorld.scene.remove(ABWorld.scene.getObjectByName("astarpath"));
// ######################
}
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) {
updateStatusBefore(a); // show status line before moves
// #### Created code ####
var temp = [ai, aj]; // used to keep track of where the agent is currently before move is taken
// ######################
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
// #### Created code ####
agentLastVisited = temp; // used to remember where agent started from last step
// ######################
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
}