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perlin_noise
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Dijkstra überarbeitet

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master
Schoko 4 years ago
parent ad4e93c284
commit 5ace7839a0
3 changed files with 144 additions and 70 deletions
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  1. 57
      board.js
  2. 154
      dijkstra.js
  3. 3
      index.html

57
board.js
Unescape View File

@ -9,14 +9,18 @@ var tilesColor = [water,beach,grass]
var board_numbers = [];
var cycle = 50;
var tile_width=16;
var tile_height=16;
var width = Math.floor(1600 / tile_width);
var height = Math.floor(800 / tile_height);
var tile_width=32;
var tile_height=32;
var width = Math.floor(640 / tile_width);
var height = Math.floor(640 / tile_height);
var current_noise = [];
var currentBoardArray = [];
var clickCounter = 0;
var startx = 0;
var starty = 0;
var endx = 0;
var endy = 0;
function findHeighestNumber(array){
@ -100,7 +104,7 @@ function createBoard(height, width, array){
var board = document.getElementById("can");
var context = board.getContext("2d");
console.log(array);
////console.log(array);
for(var i = 0; i < height; i++){
for(var j = 0; j < width; j++){
@ -137,7 +141,7 @@ function generate_perlin_noise(rounds,height,width){
for(var r = 0; r < rounds; r++){
var tmp_array = [];
//console.log("------------------ Step "+r+" --------------");
////console.log("------------------ Step "+r+" --------------");
@ -148,11 +152,11 @@ function generate_perlin_noise(rounds,height,width){
var startValue = Math.random() * (maxValue - minValue) + minValue; //Stupid, but i always forgot, how to set the boundries
var counter = 0;
for(var j = 0; j < width; j++){
//console.log(counter);
//console.log("Step "+i+"+"+j+":");
//console.log("counter: "+counter);
////console.log(counter);
////console.log("Step "+i+"+"+j+":");
////console.log("counter: "+counter);
if (j % (points_width - 1) === 0 && !(j === 0) || j === (width - 1)){
//console.log(counter);
////console.log(counter);
let endValue = Math.random() * (maxValue - minValue) + minValue; //Stupid, but i always forgot, how to set the boundries
interpolate(startValue, endValue, counter);
row = row.concat(interpolate(startValue, endValue, counter));
@ -162,7 +166,7 @@ function generate_perlin_noise(rounds,height,width){
counter++;
}
}
//console.log(row);
////console.log(row);
tmp_array.push(row);
}
@ -192,7 +196,7 @@ function generate_perlin_noise(rounds,height,width){
points_width = Math.floor(points_width / 2)+1;
points_height = Math.floor(points_height / 2)+1;
}
console.log(result);
//console.log(result);
//return result;
@ -206,8 +210,8 @@ function generate_perlin_noise(rounds,height,width){
combi.push(rows);
}
console.log("------------- Ergebnisse ----------- Ergebnisse -------------");
console.log(combi);
//console.log("------------- Ergebnisse ----------- Ergebnisse -------------");
//console.log(combi);
// adding all array to one array
for(var r = 0; r < rounds; r++){
@ -230,8 +234,8 @@ function generate_perlin_noise(rounds,height,width){
// ???? Anomalie ????
console.log(result);
console.log(combi);
//console.log(result);
//console.log(combi);
return combi;
}
@ -242,11 +246,12 @@ function generate_perlin_noise(rounds,height,width){
* */
function run_perlin_noise(){
var noise_array = generate_perlin_noise(cycle,width,height);
console.log(noise_array);
//console.log(noise_array);
current_noise = noise_array;
currentBoardArray = createBoardArray(current_noise, height, width);
createBoard(height,width,currentBoardArray);
//currentBoardArray = createBoardArray(current_noise, height, width);
//dijkstra(currentBoardArray,startx,15,15,30,30);
}
@ -283,16 +288,26 @@ function moveShip(canvas, e){
var y = Math.floor(e.clientY - rect.top);
var ship = new Ship(x,y,5);
ship.draw(canvas.getContext("2d"));
console.log("x: "+x+" y: "+y);
//console.log("x: "+x+" y: "+y);
}
window.onload = (function(){
var can = document.getElementById("can");
can.addEventListener('mousedown', function(e){
var can = document.getElementById("can");
rect = can.getBoundingClientRect();
can.addEventListener('mousedown', function(e){
var x = Math.floor((e.clientX - rect.left)/tile_width);
var y = Math.floor((e.clientY - rect.top )/tile_height);
if(clickCounter === 2){
clickcounter = 1;
endx = x;
endy = y;
console.log(startx+" "+starty+" : "+endx+" "+endy);
currentBoardArray = createBoardArray(current_noise, height, width);
dijkstra(currentBoardArray, startx, starty,endx,endy);
} else {
clickCounter++;
startx = x;
starty = y;
}
createBoard(height,width,currentBoardArray);
moveShip(can, e);

154
dijkstra.js
Unescape View File

@ -1,45 +1,47 @@
//implemtantion of dijkstra algorithm
var max = Number.MAX_SAFE_INTEGER;
var max = Number.MAX_SAFE_INTEGER-100;
function findNodeWithMinDist(list){
var result = "";
function findNodeWithMinDistAndInQ(list, Q){
var result = "NaN";
var dist = max;
for(var i = 0; i < list.length; i++){
for(var j = 0; j < list[i].length; j++){
if(dist < list[i][j]){
dist = list[i][j];
result = i+"$"+j;
}
for(var i = 0; i < Q.length; i++){
//console.log(Q[i]);
if(list.get(Q[i]) < dist){
dist = list.get(Q[i]);
result = Q[i];
}
}
//console.log("result: "+result);
return result;
}
function getNeighbours(array, i,j){
var result = [];
if(i - 1 > -1 && i+1 < array.length){
if(j-1 > -1 && j+1 < array.length){
for(var k = -1; k < 2; k++){
for(var l = -1; l < 2; l){
if(array[i][j].accessible){
result.push(i+"$"+j);
}
}
}
}
if((i-1) > -1 && (i+1) < array.length && (j-1) > -1 && j+1 < array[i].length){
for(var k = -1; k < 2; k++){
for(var l = -1; l < 2; l++){
var row =i+k;
var coloumn=j+l;
if(array[row][coloumn].accessible){
result.push(row+"$"+coloumn);
}
}
}
} else {
for(var k = -1; k < 2; k++){
for(var l = -1; l < 2; l){
for(var l = -1; l < 2; l++){
var row =i+k;
var coloumn=j+l;
try{
if(array[i][j].accessible){
result.push(i+"$"+j);
if(array[row][coloumn].accessible){
result.push(row+"$"+coloumn);
}
} catch(e){
console.log("zugriff auserhalb des feldes");
////console.log("zugriff auserhalb des feldes");
}
}
}
@ -53,40 +55,96 @@ function getNeighbours(array, i,j){
*
*/
function dijkstra(array, start_i, start_j, end_i,end_j){
var Q = new Set();
var distance = [];
var pre = [];
var Q = [];
var distance = new Map();
var pre = new Map();
for(var i = 0; i < array.length; i++){
for(var j = 0; j < array[i].length; j++){
distance[i][j] = max;
pre[i][j] = null;
Q.add(i+"$"+j);
var tmp = i+"$"+j;
distance.set(tmp, max);
pre.set(tmp, null);
Q.push(tmp);
}
}
distance[start_i][start_j] = 0;
while !(Q.size === 0){
var node = findNodeWithMinDist(distance);
Q.delete(node);
distance.set(start_i+"$"+start_j, 0);
var t = 0;
while (Q.length !== 0){
var node = findNodeWithMinDistAndInQ(distance,Q);
if(node === "NaN"){
console.log(Q);
console.log(distance);
return null;
}
Q.splice(Q.indexOf(node),1);
var indices = node.split("$");
var neighbours = getNeighbours(array,indicies[0],indices[1]);
for(var i = 0; i < indices.length; i++){
var alt = dist[indices[0]][indices[1]]+1;
if(Q.has(neighbours[i])){
var indices_neighbour = neighbour[i].split("$");
if(alt < dist[indices_neighbour[i]][indices_neighbour[j]]){
dist[indicies_neighbour[i]][indices_neighbour[j]] = alt;
pre[indices_neighbour[i]][indices_neighbour[j]] = node;
indices[0] = parseInt(10, indices[0]);
indices[1] = parseInt(10, indices[1]);
var neighbours = getNeighbours(array,indices[0],indices[1]);
//console.log(node+" === "+end_i+"$"+end_j);
if(node.localeCompare(end_i+"$"+end_j) === 0){
console.log("YAY");
console.log(t);
console.log(distance);
console.log(pre);
return reverse(end_i+"$"+end_j,start_i+"$"+start_j,pre);
}
for(var i = 0; i < neighbours.length; i++){
var alt = distance.get(node)+1;
if(Q.includes(neighbours[i])){
if(alt < distance.get(neighbours[i])){
distance.set(neighbours[i], alt);
pre.set(neighbours[i], node);
}
}
}
}
//console.log(t);
t++;
}//
console.log(t);
console.log(distance);
console.log(pre);
return {dist: distance[], pre: pre[]};
return null;
}
function reverse(target, source, pre){
var path = [];
var u = target;
console.log("target: "+target);
console.log("source: "+source);
if(pre.get(u) != null || u === source){
console.log("hallo");
while(u != null){
console.log("hallo");
u = pre.get(u);
path = [u].concat(path);
}
}
path.push(target);
path.shift();
console.log("!!!!")
console.log(path);
return path;
}

3
index.html
Unescape View File

@ -2,11 +2,12 @@
<html>
<head>
<title>Perlin Noise</title>
<script src="dijkstra.js"></script>
<script src="board.js"></script>
</head>
<body>
<h1> Perlin Noise</h1>
<canvas id="can" width="1600" height="800" style="border:1px solid #000000;"></canvas>
<canvas id="can" width="640" height="640" style="border:1px solid #000000;"></canvas>
<button id="new_btn"> Neu </button>
</body>
</html>

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