// Cloned by Rahul K Johny on 7 Nov 2022 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?
//~
//Gandalf(couldn't find royalty free image of frodo :( )
//has finally reached mordor and has to take the ring to mount doom to destroy it!
//But gollum is trying to catch him to secure the ring for himself and with the power of A*, he might just succeed!
//~
//Of course, all credits to the characters go to J. R. R. Tolkien~~~~~~~~~~~~~~~~~~~
AB.clockTick = 100; // 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)
const TEXTURE_WALL = '/uploads/rkj43/lava-g6d44b1eb3_1920.jpg' ;
const TEXTURE_MAZE = '/uploads/rkj43/sauron_eye_minecraft.jpg' ;
const TEXTURE_AGENT = '/uploads/rkj43/gandalf-g33a954d15_1920.jpg' ;
const TEXTURE_ENEMY = '/uploads/rkj43/gollum-gc1384b5f2_1920.jpg' ;
// RKJ
//credits:
//Pixabay Free License
//https://pixabay.com/photos/gollum-sculpture-figure-my-precious-6602389/
//https://pixabay.com/illustrations/gandalf-lord-of-rings-sorcerer-5193728/
//https://pixabay.com/illustrations/lava-cracked-background-fire-656827/
//Sauron minecraft eye By AlyxVixen, https://www.furaffinity.net/view/36866979/
const MUSIC_BACK = '/uploads/rkj43/epic-cinematic-trailer-113981.mp3' ;
const SOUND_ALARM = '/uploads/rkj43/tadaa-47995.mp3' ;
// credits:
// Music by PavelYudin from Pixabay https://pixabay.com/music/build-up-scenes-epic-cinematic-trailer-113981/
//Sound Effect from Pixabay https://pixabay.com/sound-effects/tadaa-47995/
const gridsize = 25; // 25; // number of squares along side of world
const NOBOXES = Math.trunc ( (gridsize * gridsize) / 10 ); // 10
// density of maze - number of internal boxes
// (bug) use trunc or can get a non-integer
const squaresize = 200; // 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
// Sky/Cloud boxes created by Zachery "skiingpenguins" Slocum
//(freezurbern@gmail.com)
//http://www.freezurbern.com
const SKYBOX_ARRAY = [
"/uploads/rkj43/vulcan_ft.jpg",
"/uploads/rkj43/vulcan_bk.jpg",
"/uploads/rkj43/vulcan_up.jpg",
"/uploads/rkj43/vulcan_dn.jpg",
"/uploads/rkj43/vulcan_rt.jpg",
"/uploads/rkj43/vulcan_lf.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, astarpath;
var wall_texture, agent_texture, enemy_texture, maze_texture;
// enemy and agent position on squares
var ei, ej, ai, aj;
var badsteps;
var goodsteps;
//https://stackoverflow.com/questions/13578287/a-a-star-algorithm-clarification
//The "Open set" is the set of nodes we choose current from -
//that is, it contains all the nodes we might be interested in looking at next.
//The "Closed set" is the set of nodes we've already considered.
//// Daniel Shiffman
// Nature of Code: Intelligence and Learning
// https://github.com/shiffman/NOC-S17-2-Intelligence-Learning
//~RKJ~
var openset = [];
var closedset = [];
var path=[];
var newpath2=[];
var start;
var end;
var previousei=0;
var previousej=0;
var previousai=0;
var previousaj=0;
var placeholder=[]; //~RKJ~ Array to hold three.js objects, probably should call it objectholder
//~RKJ~ heuristic function to implement A*
//Initially I had used the same heuristic function that Daniel Shiffman had used and I found it to be a bit...slower?
//probably cause I made a mistake somewhere else
//https://isaaccomputerscience.org/concepts/dsa_search_a_star?examBoard=all&stage=all
//The above website helped me understand that Daniel Shiffman was using Manhattan distance heuristic
//and that there are two more distance heuristics I can try
//Euclidian distance and Great circle distance
//Great circle distance looked too complex and It is the shortest distance between two points on the surface of a sphere, thus I'm ignoring that.
function heuristic(a, b)
{
//return ( Math.abs(a.i - b.i) + Math.abs(a.j - b.j) ); //Manhattan distance
return ( Math.sqrt(Math.pow((a.i - b.i),2) + Math.pow((a.j - b.j),2)) ); //Euclidean distance
// no diagonal moves
// so this is optimistic
}
//FROM
// Daniel Shiffman
// Nature of Code: Intelligence and Learning
// https://github.com/shiffman/NOC-S17-2-Intelligence-Learning
//~RKJ~ Function to delete from 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);
}
//~RKJ~ // An object to describe a spot in the grid
function Locate(i, j)
{
// Location
this.i = i;
this.j = j;
this.value=0;
// f, g, and h values for A star algorithm
this.f = 0;
this.g = 0;
this.h = 0;
// Neighbors
this.neighbors = [];
this.previous = undefined;
// Determine the neighbours
this.addNeighbors = function(GRID)
{
var i = this.i;
var j = this.j;
if (i < gridsize - 1) this.neighbors.push(GRID[i + 1][j]);
if (i > 0) this.neighbors.push(GRID[i - 1][j]);
if (j < gridsize - 1) this.neighbors.push(GRID[i][j + 1]);
if (j > 0) this.neighbors.push(GRID[i][j - 1]);
}
}
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;
if ( GRID[i][j].value == GRID_WALL ) return true; // fixed objects
if ( GRID[i][j].value == 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,text;
// set up GRID as 2D array
for ( i = 0; i < gridsize ; i++ )
{
GRID[i] = new Array(gridsize);
}
for ( i = 0; i < gridsize ; i++ )
for ( j = 0; j < gridsize ; j++ )
{
GRID[i][j] = new Locate(i, j); //~RKJ~ Define grid position as an object
}
// All the neighbors
for (var i = 0; i < gridsize; i++)
for (var j = 0; j < gridsize; j++)
{
GRID[i][j].addNeighbors(GRID); //~RKJ~ Adding neigbours for each point in Grid
}
// 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].value = 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].value = 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].value = 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();
start = GRID[ei][ej]; //~RKJ~ start point of A* Alogrithm is enemy position
// 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();
end= GRID[ai][aj]; //~RKJ~ End point of A* Path is Agent position
// ~RKJ~ A* begins here
openset.push(start);
// 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 -----------------------------------
//~RKJ~ Function to draw path from Enemy to Agent with random colors
//credits :
//https://dev.to/toluagboola/build-a-random-hex-color-generator-with-vanilla-javascript-3382
function drawpath(i,j)
{
const color1 = '#' + Math.floor(Math.random() * (0xffffff + 1)).toString(16).padStart(6, '0')
geometry = new THREE.SphereGeometry( 30 );
material = new THREE.MeshBasicMaterial( { color: color1} );
astarpath = new THREE.Mesh( geometry, material );
ABWorld.scene.add(astarpath);
astarpath.position.copy ( translate(i,j) ); // translating (i,j) grid coordinates to three.js (x,y,z) coordinates
ABWorld.lookat.copy ( astarpath.position );// if camera moving, look back at where the enemy is
}
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
//~RKJ~ Delete old drawn Path
for (var i=0 ; i<placeholder.length;i++)
{
ABWorld.scene.remove(placeholder[i]);
}
//~RKJ~ Empty arrays for next A* run
openset=[];
closedset=[];
start = GRID[ei][ej];
end= GRID[ai][aj];
openset.push(start);
for ( i = 0; i < gridsize ; i++ )
{
for ( j = 0; j < gridsize ; j++ )
{
GRID[i][j].g=0;
GRID[i][j].f=0;
GRID[i][j].h=0;
GRID[i][j].previous=undefined;
}
}
//~RKJ~ A* Algorithm start
// Daniel Shiffman
// Nature of Code: Intelligence and Learning
// https://github.com/shiffman/NOC-S17-2-Intelligence-Learning
while (openset.length > 0)
{
// Best next option
var best = 0;
for (var i = 0; i < openset.length; i++)
if (openset[i].f < openset[best].f) // ~RKJ~ least and optimal cost
best = i;
var current = openset[best];
// Complete check
if (current === end)
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 (var i = 0; i < neighbors.length; i++)
{
var neighbor = neighbors[i];
// Valid next spot?
if (!closedset.includes(neighbor) && (neighbor.value)!==2 && (neighbor.value)!==1) // ~RKJ~ Discard walls and mazes from being neighbors
{
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); //~RKJ~ Calculate heuristic to agent
neighbor.f = neighbor.g + neighbor.h; //~RKJ~ Caclulate cost to agent
neighbor.previous = current; //~RKJ~ Save previous node to be used for drawing the path
}
}
}
}
//~RKJ~ Get shortest Path from Enemy to Agent
path = [];
var temp = current;
path.push(temp);
while (temp.previous)
{
path.push(temp.previous);
temp = temp.previous;
}
i=path[path.length-2].i; //~RKJ~ First point is current location, length-2 to make sure Enemy moves from its current location
j=path[path.length-2].j; //~RKJ~
previousei=ei;
previousej=ej;
if ( ! occupied(i,j) ) // if no obstacle then move, else just miss a turn
{
ei = i;
ej = j;
}
for (var f = 0; f < path.length-1; f++)
{
drawpath(path[f].i,path[f].j);
placeholder.push(astarpath); //~RKJ~ Drawing the path each run
}
}
function moveLogicalAgent( a ) // this is called by the infrastructure that gets action a from the Mind
{
var i = ai;
var j = aj;
previousai=ai;
previousaj=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 )
{
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> Gandalf trapped. Gollum gets the RING!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
}