Perlin Noise based Minecraft Tunnel
How do I make an perlin noise based minecraft tunnel?
This experiment is based on Notch minecraft renderer (http://jsfiddle.net/uzMPU/), but addapted to be used with perlin noise for map generation.. What is a perlin noise based minecraft tunnel? How do you make a perlin noise based minecraft tunnel? This script and codes were developed by Endre Simo on 25 November 2022, Friday.
Perlin Noise based Minecraft Tunnel - Script Codes HTML Codes
<!DOCTYPE html>
<html >
<head> <meta charset="UTF-8"> <title>Perlin Noise based Minecraft Tunnel</title> <link rel="stylesheet" href="css/style.css">
</head>
<body> <header> <span id="wrap"></span> <span id="arrow"></span> <h1>Perlin Noise based Minecraft Tunnel</h1> <span class='header-open'> click on <label id="label">+</label> for more info </span> <!-- Description about the experiment--> <div class="description"> <div class="horizontal-line"> <span style="width: 100%"></span> </div> <section id="about"> <p id accesskey="a" class="about"> <p>Canvas experiment based on Notch <a href="http://jsfiddle.net/uzMPU/">Minecraft renderer </a> using perlin noise for random map generation and fake shadow and fog for atmospheric environment.</p> <p>The perlin noise algorithm was ported to JS from the original Java class <a target="_blank" href="https://mrl.nyu.edu/~perlin/noise/">https://mrl.nyu.edu/~perlin/noise/</a>.</p> </p> </section> </div> <div class="vertical-line"></div>
</header>
<div class="wrapper"> <div class="context"></div> <h1>Look around by dragging and holding the mouse button</h1>
</div>
<div id="gui"></div>
<script> function getIEVersion() { var rv = -1; // Return value assumes failure. if (navigator.appName == 'Microsoft Internet Explorer') { var ua = navigator.userAgent; var re = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})"); if (re.test(ua) != null) rv = parseFloat( RegExp.$1 ); } return rv; } function checkVersion() { var ver = getIEVersion(); if ( ver != -1 ) { if (ver <= 9.0) { document.body.innerHTML = ""; document.body.innerHTML = "<p class='no-canvas'>" + "You need a <a href='https://www.google.com/chrome'>modern browser</a> to view this experiment." + "</p>"; } } } checkVersion();
</script> <script src="js/index.js"></script>
</body>
</html>
Perlin Noise based Minecraft Tunnel - Script Codes CSS Codes
@import "https://fonts.googleapis.com/css?family=Dosis:600|Roboto+Slab:100,300,400,700";
@import url(https://fonts.googleapis.com/css?family=Roboto+Condensed:300);
html, body { width: 100%; height: 100%; overflow: hidden; background: #111; margin: 0; padding: 0; -webkit-user-select: none; -moz-user-select: none; -khtml-user-select: none; user-select: none;
}
/*******************************
* HEADER *
********************************/
header { position: absolute; background: rgba(14, 14, 14, 0.4); opacity: 0.7; z-index: 10; height: 40px; width: 100%; padding: 0 8px 8px 8px; overflow: hidden; font-family: "Roboto Slab",sans-serif; font-size: 16px; color: #fff; text-shadow: 1px 1px 1px #333; text-decoration: none; display: inline-block; box-shadow: 0px 2px 8px rgba(0, 0, 0, 0.80); -moz-box-shadow: 0px 2px 8px rgba(0, 0, 0, 0.80); -webkit-box-shadow: 0px 2px 8px rgba(0, 0, 0, 0.80); -webkit-transition: height .20s ease-in-out; -moz-transitoon: height .20s ease-in-out; -o-transition: height .20s ease-in-out; transition: height .20s ease-in-out;
}
header #arrow { color: #adff2f; float: left; margin-right: 15px; margin-top: 8px; font-family: "Times New Roman", sans-serif; font-size: 26px; z-index: 2; cursor: pointer; -webkit-transition: all 0.9s cubic-bezier(0.165, 0.84, 0.44, 1) 0s; -moz-transition: all 0.9s cubic-bezier(0.165, 0.84, 0.44, 1) 0s; -o-transition: all 0.9s cubic-bezier(0.165, 0.84, 0.44, 1) 0s; -ms-transition: all 0.9s cubic-bezier(0.165, 0.84, 0.44, 1) 0s; transition: all 0.9s cubic-bezier(0.165, 0.84, 0.44, 1) 0s; -webkit-transform:rotate(0deg); -moz-transform:rotate(0deg); -o-transform:rotate(0deg); -ms-transform:rotate(0deg); transform: rotate(0deg);
}
#arrow.animate { -webkit-transition: all 0.9s cubic-bezier(0.165, 0.84, 0.44, 1) 0s; -moz-transition: all 0.9s cubic-bezier(0.165, 0.84, 0.44, 1) 0s; -o-transition: all 0.9s cubic-bezier(0.165, 0.84, 0.44, 1) 0s; -ms-transition: all 0.9s cubic-bezier(0.165, 0.84, 0.44, 1) 0s; transition: all 0.9s cubic-bezier(0.165, 0.84, 0.44, 1) 0s; -webkit-transform:rotate(135deg); -moz-transform:rotate(135deg); -o-transform:rotate(135deg); -ms-transform:rotate(135deg); transform: rotate(135deg);
}
header #arrow:before { content: "\2b";
}
.header-open #label { color: #fff;
}
header #wrap { position: absolute; width: 100%; height: 100%; opacity: 0.4; z-index: -10;
}
header h1 { cursor: default; font-size: 90%; font-weight: 200; float: left; position: relative; display: inline-block; text-transform: uppercase; vertical-align: middle; z-index: 3; opacity: 0.9;
}
header .header-open { clear: both; float: left; margin-top: -10px; padding: 0 0 5px; padding-left: 128px; display: inline-block; text-decoration: none; text-transform: none; font-family: "Molengo", Times, "Times New Roman", cursive; font-weight: normal; font-size: 10pt; color: GrayText; -webkit-transition: opacity .4s cubic-bezier(0.215, 0.610, 0.355, 1.000); -moz-transition: opacity .4s cubic-bezier(0.215, 0.610, 0.355, 1.000); -ms-transition: opacity .4s cubic-bezier(0.215, 0.610, 0.355, 1.000); -o-transition: opacity .4s cubic-bezier(0.215, 0.610, 0.355, 1.000); transition: opacity .4s cubic-bezier(0.215, 0.610, 0.355, 1.000);
}
/*******************************
* Header description
********************************/
header .description { clear: both; position: absolute; padding: 5px 10px; font-family: "Roboto Condensed", Helvetica, Arial, sans-serif; font-weight: normal; text-align: justify; color: #dcdcdc; font-size: 11pt; width: 400px; margin: 55px 20px; background-color:rgba(0,0,0,.2); -webkit-border-radius:4px; -moz-border-radius:4px; -ms-border-radius:4px; border-radius:4px; -webkit-box-shadow:0 1px 0 rgba(255,255,255,.05),inset 0 1px 0 rgba(0,0,0,.2); -moz-box-shadow:0 1px 0 rgba(255,255,255,.05),inset 0 1px 0 rgba(0,0,0,.2); -ms-box-shadow:0 1px 0 rgba(255,255,255,.05),inset 0 1px 0 rgba(0,0,0,.2); box-shadow:0 1px 0 rgba(255,255,255,.05),inset 0 1px 0 rgba(0,0,0,.2); -webkit-transition: opacity .4s cubic-bezier(0.215, 0.610, 0.355, 1.000); -moz-transition: opacity .4s cubic-bezier(0.215, 0.610, 0.355, 1.000); -ms-transition: opacity .4s cubic-bezier(0.215, 0.610, 0.355, 1.000); -o-transition: opacity .4s cubic-bezier(0.215, 0.610, 0.355, 1.000); transition: opacity .4s cubic-bezier(0.215, 0.610, 0.355, 1.000);
}
.horizontal-line { height: 1px; margin-top: -20px; padding-top: 5px; position: relative; border-top-style: solid; border-top-width: 1px; border-top-color: rgba(247,247,247, 0.6); border-bottom-style: hidden; border-left-style: hidden; border-right-style: hidden; opacity: 0; -webkit-transition: opacity .4s ease-out; -moz-transition: opacity .4s ease-out; -ms-transition: opacity .4s ease-out; -o-transition: opacity .4s ease-out; transition: opacity .4s ease-out;
}
span[article] { font-style: italic;
}
header h2 { text-transform: uppercase; font-size: 10pt; margin-top: 14px; margin-left: 20px; color: #fff;
}
/*******************************
* Header dropdown animation
********************************/
header.animate { height: 200px;
}
header.animate .horizontal-line { margin-top: -40px; opacity: 1;
}
header.animate .header-open { opacity: 0;
}
header.animate .description { padding-top: 25px;
}
a { text-decoration: none; color: #adff2f;
}
/*******************************
* Header sharing
********************************/
/* Vertical line */
header .vertical-line { clear: both; position: absolute; float: left; left: 450px; top: 60px; width: 1px; height: 152px; margin-left: 10px; margin-right: 10px; border-left-style: solid; border-left-width: 1px; border-left-color: #002626; opacity: 0.4; border-bottom-style: transparent; border-top-style: transparent; border-right-style: transparent; -webkit-box-shadow: inset 1px 0 1px 0 rgba(36,71,50,.1); -moz-box-shadow: inset 1px 0 1px 0 rgba(36,71,50,.1); -ms-box-shadow: inset 1px 0 1px 0 rgba(36,71,50,.1); -o-box-shadow: inset 1px 0 1px 0 rgba(36,71,50,.1); box-shadow: inset 1px 0 1px 0 rgba(36,71,50,.1); -webkit-transition: opacity 1s ease-out; -moz-transition: opacity 1s ease-out; -ms-transition: opacity 1s ease-out; -o-transition: opacity 1s ease-out; transition: opacity 1s ease-out;
}
header.animate .vertical-line { opacity: 1;
}
header .share { -webkit-box-sizing: border-box; position: relative; float:left; padding: 0 10px; font-family: "Dosis", Helvetica, Arial, sans-serif; font-weight: normal; color: #dcdcdc; font-size: 11pt; width: 320px; height: 100px; margin: 17px 210px; background-color:rgba(0,0,0,.2); -webkit-box-shadow:0 1px 0 rgba(255,255,255,.05),inset 0 1px 0 rgba(0,0,0,.2); -moz-box-shadow:0 1px 0 rgba(255,255,255,.05),inset 0 1px 0 rgba(0,0,0,.2); -ms-box-shadow:0 1px 0 rgba(255,255,255,.05),inset 0 1px 0 rgba(0,0,0,.2); box-shadow:0 1px 0 rgba(255,255,255,.05),inset 0 1px 0 rgba(0,0,0,.2); -webkit-transition: opacity .4s cubic-bezier(0.215, 0.610, 0.355, 1.000); -moz-transition: opacity .4s cubic-bezier(0.215, 0.610, 0.355, 1.000); -ms-transition: opacity .4s cubic-bezier(0.215, 0.610, 0.355, 1.000); -o-transition: opacity .4s cubic-bezier(0.215, 0.610, 0.355, 1.000); transition: opacity .4s cubic-bezier(0.215, 0.610, 0.355, 1.000);
}
.share .twitter, .tumblr, .gplus { float: left;
}
/*******************************
* Main display
********************************/
div#main { position:relative!important; display: block!important; width: 900px!important; height: 600px!important; width: 100%; margin: 0 auto; border: 1px solid #222; -webkit-border-radius: 2px; -moz-border-radius: 2px; -ms-border-radius: 2px; -o-border-radius: 2px; border-radius: 2px; -webkit-box-shadow: 0px 2px 17px rgba(0,0,0,.80), inset 0 0 15px 15px rgba(5,5,5,.2); -moz-box-shadow: 0px 2px 17px rgba(0,0,0,.80), inset 0 0 15px 15px rgba(5,5,5,.2); box-shadow: 0px 2px 17px rgba(0,0,0,.80), inset 0 0 15px 15px rgba(5,5,5,.2);
}
div.context { position:realtive; width: 920px; height: 620px; margin: 0 auto; border: 1px solid #222; -webkit-border-radius: 2px; -moz-border-radius: 2px; -ms-border-radius: 2px; -o-border-radius: 2px; border-radius: 2px; -webkit-box-shadow: 0px 2px 17px rgba(0,0,0,.80), inset 0 0 15px 15px rgba(5,5,5,.2); -moz-box-shadow: 0px 2px 17px rgba(0,0,0,.80), inset 0 0 15px 15px rgba(5,5,5,.2); box-shadow: 0px 2px 17px rgba(0,0,0,.80), inset 0 0 15px 15px rgba(5,5,5,.2);
}
div.wrapper { position: absolute; width: 100%; margin: 0; padding: 0; top: 150px;
}
.context #canvas { position: relative; cursor: pointer; width: 900px; height: 600px; left: 10px; top: 10px;
}
.no-canvas { color: #999999; font-size: 24px; text-align: center; margin-top: 150px;
}
.wrapper h1 { font-size: 22px; font-family: "Roboto Slab",sans-serif; font-weight: 200; margin: 0 auto; width: 940px; text-align: center; color: #fff; opacity: 0.6; padding: 10px 0;
}
.wrapper h1:before { position: relative; opacity: 1; left:0; top: 10px; margin-right: 10px;
}
Perlin Noise based Minecraft Tunnel - Script Codes JS Codes
window.onload = function() { var toggleMouseDown = true; var toggleTimer = -1; var headerArrow = document.querySelector('#arrow'); var header = document.getElementsByTagName('header')[0]; document.addEventListener('click', onMouseClick, false); document.addEventListener('mousedown', onMouseDown, false); function onMouseClick(e) { e.stopPropagation(); toggleMouseDown = true; if (e.target === headerArrow && toggleMouseDown) { if (header.className === '') { clearTimeout(toggleTimer); toggleMouseDown = false; toggleTimer = setTimeout(function() { header.setAttribute('class', 'animate'); headerArrow.setAttribute('class', 'animate'); }, 1000/60); } else if (header.className === 'animate') { clearTimeout(toggleTimer); toggleTimer = setTimeout(function() { header.setAttribute('class', ''); headerArrow.setAttribute('class', ''); }, 1000/60); } } } function onMouseDown(e) { e.stopPropagation(); removeEventListener('click', onMouseClick, false); if (e.target !== headerArrow) { clearTimeout(toggleTimer); toggleTimer = setTimeout(function() { header.setAttribute('class', ''); headerArrow.setAttribute('class', ''); }, 1000/60); } else if (!toggleMouseDown) { toggleMouseDown = true; clearTimeout(toggleTimer); header.setAttribute('class', 'animate'); headerArrow.setAttribute('class', 'animate'); } } function getArrow(elt) { var supportCSS3 = document.body.style['MozPerspective'] !== undefined || document.body.style['webkitPerspective'] !== undefined; if (supportCSS3) { var selector = document.querySelectorAll(elt); var nodeLength = selector.length; for (var i=0; i< nodeLength; i++) { var node = selector[i]; if (node.className && !node.class.match('/animate/g')) { node.className += 'animate'; node.innerHTML = '<span data-name="' + node.text + '">' + node.innerHTML + '</span>'; } } } }
};
var NOISE = { 'Revision' : '0.1'};
var NOISE = NOISE || { };
NOISE.Perlin = (function() { var iOctaves = 1, fPersistence = 0.2, fResult, fFreq, fPers, aOctFreq, // frequency per octave aOctPers, // persistance per octave fPersMax; // 1 / max persistence var octaveFreq = function() { var fFreq, fPers; aOctFreq = new Array(); aOctPers = new Array(); fPersMax = 0; for (var i=0; i < iOctaves; i++) { fFreq = Math.pow(2,i); fPers = Math.pow(fPersistence, i); fPersMax += fPers; aOctFreq.push(fFreq); aOctPers.push(fPers); } fPersMax = 2 / fPersMax; } var perm = new Uint8Array(512); var p = new Uint8Array(256); var grad3 = [[1,1,0],[-1,1,0],[1,-1,0],[-1,-1,0], [1,0,1],[-1,0,1],[1,0,-1],[-1,0,-1], [0,1,1],[0,-1,1],[0,1,-1],[0,-1,-1]]; // Return the dot product for 2d perlin noise function dot2(g, x, y) { return g[0]*x + g[1]*y; } // Return the dot product for 3d perlin noise function dot3(g, x, y, z) { return g[0]*x + g[1]*y + g[2]*z; } // Seeded random number generator function seed(x) { x = (x<<13) ^ x; return ( 1.0 - ( (x * (x * x * 15731 + 789221) + 1376312589) & 0x7fffffff) / 1073741824.0); } function init() { for (var i = 0; i < 256; i++) { p[i] = Math.abs(~~(seed(i) * 256)); } // To remove the need for index wrapping, double the permutation table length for (var i=0; i < 512; i++) { perm[i] = p[i & 255]; } } /* ** 2D Simplex Noise */ function noise2D (x, y, z) { // Find unit grid cell containing point var X = Math.floor(x) & 255; var Y = Math.floor(y) & 255; // Get relative xyz coordinates of point within that cell x -= Math.floor(x); y -= Math.floor(y); var fade = function(t) { return t * t * t * (t * (t * 6.0 - 15.0) + 10.0); }; var lerp = function(a, b, t) { return (1.0-t)*a + t*b; } var u = fade(x), v = fade(y); // Calculate a set of four hashed gradient indices var n00 = perm[X + perm[Y ]] % 12; var n01 = perm[X + perm[Y+1]] % 12; var n10 = perm[X+1 + perm[Y+1]] % 12; var n11 = perm[X+1 + perm[Y+1]] % 12; // Calculate noise contributions from each of the four corners var gi00 = dot2(grad3[n00], x, y ); var gi01 = dot2(grad3[n01], x, y-1); var gi10 = dot2(grad3[n10], x-1, y ); var gi11 = dot2(grad3[n11], x-1, y-1); // Interpolate the results along axises return lerp( lerp(gi00, gi10, u), lerp(gi01, gi11, u), v); } /* ** 3D Simplex Noise */ function noise3D (x, y, z) { // Find unit grid cell containing point var X = Math.floor(x) & 255; var Y = Math.floor(y) & 255; var Z = Math.floor(z) & 255; // Get relative xyz coordinates of point within that cell x -= Math.floor(x); y -= Math.floor(y); z -= Math.floor(z); var fade = function(t) { return t * t * t * (t * (t * 6.0 - 15.0) + 10.0); }; var lerp = function(a, b, t) { return (1.0-t)*a + t*b; } var u = fade(x), v = fade(y), w = fade(z); // Calculate a set of eight hashed gradient indices var n000 = perm[X + perm[Y + perm[Z ]]] % 12; var n001 = perm[X + perm[Y + perm[Z+1]]] % 12; var n010 = perm[X + perm[Y+1+perm[Z ]]] % 12; var n011 = perm[X + perm[Y+1+perm[Z+1]]] % 12; var n100 = perm[X+1+perm[Y + perm[Z ]]] % 12; var n101 = perm[X+1+perm[Y + perm[Z+1]]] % 12; var n110 = perm[X+1+perm[Y+1+perm[Z ]]] % 12; var n111 = perm[X+1+perm[Y+1+perm[Z+1]]] % 12; // Calculate noise contributions from each of the eight corners var gi000 = dot3(grad3[n000], x, y, z ); var gi001 = dot3(grad3[n001], x, y, z-1); var gi010 = dot3(grad3[n010], x, y-1, z ); var gi011 = dot3(grad3[n011], x, y-1, z-1); var gi100 = dot3(grad3[n100], x-1, y, z ); var gi101 = dot3(grad3[n101], x-1, y, z-1); var gi110 = dot3(grad3[n110], x-1, y-1, z ); var gi111 = dot3(grad3[n111], x-1, y-1, z-1); // Interpolate the results along axises return lerp( lerp( lerp(gi000, gi100, u), lerp(gi001, gi101, u), w), lerp( lerp(gi010, gi110, u), lerp(gi011, gi111, u), w), v); } function PerlinNoise() {} PerlinNoise.prototype = { init : init, noise : function(x, y, z) { fResult = 0; for (var i=0; i < iOctaves; i++) { fFreq = aOctFreq[i]; fPers = aOctPers[i]; switch(arguments.length) { case 3 : fResult += fPers * noise3D(fFreq*x, fFreq*y, fFreq*z); break; case 2 : fResult += fPers * noise2D(fFreq*x, fFreq*y); break; default : fResult += fPers * noise3D(fFreq*x, fFreq*y, fFreq*z); break; } } return (fResult * fPersMax + 0.8) * 0.5 }, noiseDetail : function(octaves, persistance) { iOctaves = octaves || iOctaves; fPersistence = persistance || fPersistence; octaveFreq(); } } return PerlinNoise;
}).call(this);
/*********************
***** Minecraft *****
*********************/
// Request animation frame
(function() { var lastTime = 0; var vendors = ['ms', 'moz', 'webkit', 'o']; for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) { window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame']; window.cancelAnimationFrame = window[vendors[x]+'CancelAnimationFrame'] || window[vendors[x]+'CancelRequestAnimationFrame']; } if (!window.requestAnimationFrame) window.requestAnimationFrame = function(callback, element) { var currTime = new Date().getTime(); var timeToCall = Math.max(0, 16 - (currTime - lastTime)); var id = window.setTimeout(function() { callback(currTime + timeToCall); }, timeToCall); lastTime = currTime + timeToCall; return id; }; if (!window.cancelAnimationFrame) window.cancelAnimationFrame = function(id) { clearTimeout(id); };
}());
var perlin = new NOISE.Perlin();
perlin.init();
perlin.noiseDetail(2, 4.8);
var canvas = document.createElement('canvas');
canvas.setAttribute('width', '420');
canvas.setAttribute('height', '380');
canvas.setAttribute('id', 'canvas');
var canvasWidth = canvas.width = canvas.getAttribute('width');
var canvasHeight = canvas.height = canvas.getAttribute('height');
var mainContext = document.getElementsByClassName('context')[0];
mainContext.appendChild(canvas);
var ctx = canvas.getContext('2d');
ctx.scale(2,2);
var cx = 0, cy = 0, lastX = 0, lastY = 0, dx = 0, dy = 0;
var valx = 1, valy = 1;
var curx = 0, cury = 0;
var mouseDown = false;
var image = ctx.createImageData(canvasWidth, canvasHeight);
var noisemap = ctx.createImageData(64, 64);
var pixels = image.data;
var w = canvas.width;
var h = canvas.height;
var map = new Array(64 * 64 * 64);
var texmap = new Array(16 * 16 * 3 * 16);
var fTime = 0, fDeltaT = 0, fLastTime = 0;
if (!this.millis) { var millis = function() { return new Date().getTime(); };
}
function getScrollX() { return window.pageXOffset || window.document.documentElement.scrollLeft;
}
function getScrollY() { return window.pageYOffset || window.document.documentElement.scrollTop;
}
function getMousePos(event) { event.preventDefault(); dx = event.pageX - (getScrollX() + canvas.getBoundingClientRect().left); dy = event.pageY - (getScrollY() + canvas.getBoundingClientRect().top) ; lastX = event.pageX - (getScrollX() + canvas.getBoundingClientRect().left) - cx; lastY = event.pageY - (getScrollY() + canvas.getBoundingClientRect().top) - cy; return { x: lastX, y: lastY }
}
function getTouchPos(event) { event.preventDefault(); dx = event.changedTouches[0].pageX - (getScrollX() + canvas.getBoundingClientRect().left) - lastX; dy = event.changedTouches[0].pageY - (getScrollY() + canvas.getBoundingClientRect().top) - lastY; lastX = event.changedTouches[0].pageX - (getScrollX() + canvas.getBoundingClientRect().left); lastY = event.changedTouches[0].pageY - (getScrollY() + canvas.getBoundingClientRect().top); lastX = lastX > 0 ? (lastX < canvas.width ? lastX : canvas.width) : 0; lastY = lastY > 0 ? (lastY < canvas.height ? lastY : canvas.height) : 0; return { x: lastX, y: lastY }
}
window.addEventListener('resize', function() { var canvasWidth = window.getComputedStyle(canvas, null).getPropertyValue('width'); var canvasHeight = window.getComputedStyle(canvas, null).getPropertyValue('height'); canvasWidth = parseInt(canvasWidth.substring(-2)); canvasHeight = parseInt(canvasHeight.substring(-2)); var container = document.getElementsByClassName('wrapper')[0]; container.style.top = ( window.innerHeight - canvasHeight ) / 2 + 'px';
});
canvas.addEventListener('mousemove', onMouseMove);
canvas.addEventListener('mousedown', function(event) { event.preventDefault(); cx = event.pageX - (getScrollX() + canvas.getBoundingClientRect().left) - lastX; cy = event.pageY - (getScrollY() + canvas.getBoundingClientRect().top) - lastY; mouseDown = true;
});
canvas.addEventListener('mouseup', function(event) { event.preventDefault(); mouseDown = false;
});
// Mobile devices touch events
canvas.addEventListener('touchstart', function(event) { event.preventDefault(); lastX = event.changedTouches[0].pageX - (getScrollX() + canvas.getBoundingClientRect().left); lastY = event.changedTouches[0].pageY - (getScrollY() + canvas.getBoundingClientRect().top); mouseDown = true;
});
canvas.addEventListener('touchmove', onTouchMove);
canvas.addEventListener('touchend', function(event) { event.preventDefault(); mouseDown = false;
});
function onMouseMove(e) { if (getMousePos(e).y <= 40) return; if (mouseDown) { valx = getMousePos(e).x * 0.006; valy = getMousePos(e).y * 0.008; } else { if (dx == undefined) return; }
}
function onTouchMove(e) { if (getTouchPos(e).y <= 40) return; if (mouseDown) { valx = getMousePos(e).x * 0.006; valy = getMousePos(e).y * 0.008; } else { if (dx == undefined) return; }
}
function initTexMap() { for ( var i = 1; i < 16; i++) { var br = 255 - ((Math.random() * 96) | 0); for ( var y = 0; y < 16 * 3; y++) { for ( var x = 0; x < 16; x++) { var color = 0x966C4A; if (i == 4) color = 0x7F7F7F; if (i != 4 || ((Math.random() * 3) | 0) === 0) { br = 255 - ((Math.random() * 96) | 0); } if ((i == 1 && y < (((x * x * 3 + x * 81) >> 2) & 3) + 18)) { color = 0x6AAA40; } else if ((i == 1 && y < (((x * x * 3 + x * 81) >> 2) & 3) + 19)) { br = br * 2 / 3; } if (i == 7) { color = 0x675231; if (x > 0 && x < 15 && ((y > 0 && y < 15) || (y > 32 && y < 47))) { color = 0xBC9862; var xd = (x - 7); var yd = ((y & 15) - 7); if (xd < 0) xd = 1 - xd; if (yd < 0) yd = 1 - yd; if (yd > xd) xd = yd; br = 196 - ((Math.random() * 32) | 0) + xd % 3 * 32; } else if (((Math.random() * 2) | 0) === 0) { br = br * (150 - (x & 1) * 100) / 100; } } if (i == 5) { color = 0xB53A15; if ((x + (y >> 2) * 4) % 8 === 0 || y % 4 === 0) { color = 0xBCAFA5; } } if (i == 9) { color = 0x4040ff; } var brr = br; if (y >= 32) brr /= 2; if (i == 8) { color = 0x50D937; if (((Math.random() * 2) | 0) === 0) { color = 0; brr = 255; } } var col = (((color >> 16) & 0xff) * brr / 255) << 16 | (((color >> 8) & 0xff) * brr / 255) << 8 | (((color) & 0xff) * brr / 255); texmap[x + y * 16 + i * 256 * 3] = col; } } }
}
function initMap() { //curx = (getScrollX() + canvas.getBoundingClientRect().left) + window.innerHeight >> 1; //cury = (getScrollY() + canvas.getBoundingClientRect().top) + window.innerHeight >> 1; for (var cell = 0; cell < pixels.length; cell += 4) { var ii = Math.floor(cell/4); var x = ii % canvasWidth; var y = Math.floor(ii / canvasWidth); var xx = 123 + x * .02; var yy = 324 + y * .02; var value = Math.floor((perlin.noise(xx,yy,1))*256); pixels[cell] = pixels[cell + 1] = pixels[cell + 2] = value; pixels[cell + 3] = 255; // alpha. } for ( var z = 0; z < 128; z++) { for (x = 0; x < 64; x++) { for (y = 0; y < 64; y++) { i = z << 12 | y << 6 | x; var yd = (y - 32.5) * 0.4; var zd = (z - 32.5) * 0.4; map[i] = Math.random() * 16 | 0; var r = (pixels[x + y * w] * 4 + 0) & 0xff; var g = (pixels[x + y * w] * 4 + 1) & 0xff; var b = (pixels[x + y * w] * 4 + 2) & 0xff; var pixelCol = r << 16 | g << 8 | b; i = z << 12 | y << 6 | x; if (map[i] == 0 && y > 2174564) map[i] = 9; else if (map[i] != 0) { var j = z << 12 | (y-1) << 6 | x; if (map[j] == 0) { map[i] = 1; } else { j = z << 12 | (y-2) << 6 | x; if (map[j] == 0) map[i] = 2; } } if (Math.random() > Math.sqrt(Math.sqrt(yd * yd + zd * zd)) - 0.8 && ((pixelCol & 0xff * 0.5) < (64 - y) << 2)) { map[i] = 0; } } } }
}
function renderMinecraft() { curx += (valx - curx) * 0.2; cury += (valy - cury) * 0.2; var xRot = Math.sin(Date.now() % 10000 / 10000 * Math.PI * 2) * (curx * 0.5) + Math.PI / 2; var yRot = Math.cos(Date.now() % 10000 / 10000 * Math.PI * 2) * 0.2; var yCos = Math.cos(yRot); var ySin = Math.sin(yRot); var xCos = Math.cos(xRot); var xSin = Math.sin(xRot); var ox = 32.5 + Date.now() % 10000 / 10000 * 64; var oy = 32.5 + (cury * 0.2); var oz = 32.5; for ( var x = 0; x < w; x++) { var ___xd = (x - w / 2) / h; for ( var y = 0; y < h; y++) { var __yd = (y - h / 2) / h; var __zd = 1; var ___zd = __zd * yCos + __yd * ySin; var _yd = __yd * yCos - __zd * ySin; var _xd = ___xd * xCos + ___zd * xSin; var _zd = ___zd * xCos - ___xd * xSin; var col = 0; var br = 255; var ddist = 0; var closest = 32; for ( var d = 0; d < 3; d++) { var dimLength = _xd; if (d == 1) dimLength = _yd; if (d == 2) dimLength = _zd; var ll = 1 / (dimLength < 0 ? -dimLength : dimLength); var xd = (_xd) * ll; var yd = (_yd) * ll; var zd = (_zd) * ll; var initial = ox - (ox | 0); if (d == 1) initial = oy - (oy | 0); if (d == 2) initial = oz - (oz | 0); if (dimLength > 0) initial = 1 - initial; var dist = ll * initial; var xp = ox + xd * initial; var yp = oy + yd * initial; var zp = oz + zd * initial; if (dimLength < 0) { if (d === 0) xp--; if (d === 1) yp--; if (d === 2) zp--; } while (dist < closest) { var tex = map[(zp & 127) << 12 | (yp & 63) << 6 | (xp & 63)]; if (tex > 0) { var u = ((xp + zp) * 16) & 15; var v = ((yp * 16) & 15) + 16; if (d == 1) { u = (xp * 16) & 15; v = ((zp * 16) & 15); if (yd < 0) v += 32; } var cc = texmap[u + v * 16 + tex * 256 * 3]; if (cc > 0) { col = cc; ddist = 255 - ((dist / 32 * 255) | 0); br = 255 * (255 - ((d + 2) % 3) * 50) / 255; closest = dist; if (d == 1) { var maxsh = 0.4; var shcorner = 12; tex = map[((zp-1) & 127) << 12 | ((yp-1) & 63) << 6 | ((xp-1) & 63)]; if (tex>0) br *= Math.max(maxsh, Math.min(1.0, (u+v)/shcorner)); tex = map[((zp+1) & 127) << 12 | ((yp-1) & 63) << 6 | ((xp-1) & 63)]; if (tex>0) br *= Math.max(maxsh, Math.min(1.0, (u+16-v)/shcorner)); tex = map[((zp-1) & 127) << 12 | ((yp-1) & 63) << 6 | ((xp+1) & 63)]; if (tex>0) br *= Math.max(maxsh, Math.min(1.0, (16-u+v)/shcorner)); tex = map[((zp+1) & 127) << 12 | ((yp-1) & 63) << 6 | ((xp+1) & 63)]; if (tex>0) br *= Math.max(maxsh, Math.min(1.0, (16-u+16-v)/shcorner)); var sh = 5; tex = map[((zp) & 127) << 12 | ((yp-1) & 63) << 6 | ((xp-1) & 63)]; if (tex>0) br *= Math.max(maxsh, Math.min(1.0, (u)/sh)); tex = map[((zp) & 127) << 12 | ((yp-1) & 63) << 6 | ((xp+1) & 63)]; if (tex>0) br *= Math.max(maxsh, Math.min(1.0, (16-u)/sh)); tex = map[((zp-1) & 127) << 12 | ((yp-1) & 63) << 6 | ((xp) & 63)]; if (tex>0) br *= Math.max(maxsh, Math.min(1.0, (v)/sh)); tex = map[((zp+1) & 127) << 12 | ((yp-1) & 63) << 6 | ((xp) & 63)]; if (tex>0) br *= Math.max(maxsh, Math.min(1.0, (16-v)/sh)); br = Math.max(br, 120); //br = 255; } if (d == 1) { //yp-=2; tex = map[(zp & 127) << 12 | ((yp-2) & 63) << 6 | (xp & 63)]; if (tex > 0) br *= 0.5; else { tex = map[(zp & 127) << 12 | ((yp-3) & 63) << 6 | (xp & 63)]; if (tex > 0) br *= 0.7; } } } } xp += xd; yp += yd; zp += zd; dist += ll; } } var r = ((col >> 16) & 0xff) * br * ddist / (255 * 255); var g = ((col >> 8) & 0xff) * br * ddist / (255 * 255); var b = ((col) & 0xff) * br * ddist / (255 * 255); if(ddist <= 155) r += 155-ddist; if(ddist <= 255) g += 255-ddist; if(ddist <= 255) b += 255-ddist; pixels[(x + y * w) * 4 + 0] = r; pixels[(x + y * w) * 4 + 1] = g; pixels[(x + y * w) * 4 + 2] = b; } }
}
render();
initTexMap();
initMap();
function render() { var id = requestAnimationFrame(render); renderMinecraft(); ctx.putImageData(image, 0, 0);
};
Developer | Endre Simo |
Username | esimov |
Uploaded | November 25, 2022 |
Rating | 4.5 |
Size | 9,853 Kb |
Views | 8,096 |
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