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proceduralniTextury.html
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<!DOCTYPE html>
<html lang="cs-cz">
<head>
<meta charset="UTF-8">
<meta content="width=device-width, initial-scale=1.0" name="viewport">
<title>Generování procedurálních textur</title>
<link href="darkModeStyle.css" rel="stylesheet" type="text/css"/>
<link href="appletStyle.css" rel="stylesheet" type="text/css"/>
<style>
.container {
display: flex;
flex-wrap: wrap;
flex-direction: row;
}
.containerOvladani {
display: flex;
flex-wrap: wrap;
flex-direction: column;
}
.containerKlikaci {
display: flex;
flex-wrap: wrap;
flex-direction: row;
}
.boxTextury {
padding-right: 5px;
padding-bottom: 5px;
min-width: 150px;
flex-grow: 1;
}
.boxOvladani {
padding-right: 5px;
padding-bottom: 5px;
min-width: 150px;
flex-grow: 1;
}
.code {
font-family: monospace;
}
.boxCode {
padding-right: 5px;
padding-bottom: 5px;
min-width: 450px;
flex-grow: 1;
}
.boxCodeUsed {
padding-right: 5px;
padding-bottom: 5px;
flex-grow: 1;
}
.boxCanvas {
padding-right: 5px;
padding-bottom: 5px;
max-width: fit-content;
}
.slider {
scroll-behavior: smooth;
}
</style>
</head>
<body>
<header>
<div class="header1"><h1>Generování procedurálních textur</h1></div>
<div class="user-toggle">
<div class="[ visually-hidden ][ js-mode-status ]" role="status"></div>
<button class="[ toggle-button ] [ js-mode-toggle ]">
<span class="[ toggle-button__text ] [ js-mode-toggle-text ]">Tmavý režim</span>
<span aria-hidden="true" class="toggle-button__icon"></span>
</button>
</div>
<script charset="UTF-8" src="darkMode.js" type="text/javascript"></script>
</header>
<div class="container">
<div class="containerOvladani">
<div class="containerKlikaci">
<div class="boxTextury">
<b>Výběr textury</b><br>
<form class="textura">
<input checked id="textura1" name="textura" type="radio"/>
<label for="textura1">Perlinův šum</label><br>
<input id="textura2" name="textura" type="radio"/>
<label for="textura2">Turbulence</label><br>
<input id="textura3" name="textura" type="radio"/>
<label for="textura3">Mramor</label><br>
<input id="textura4" name="textura" type="radio"/>
<label for="textura4">Dřevo</label><br>
<input id="textura5" name="textura" type="radio"/>
<label for="textura5">Mraky</label>
</form>
</div>
<div class="boxOvladani">
<b>Ovládací panel</b><br>
<form class="parametry">
<div id="slider1LabelDiv"><label for="slider1" id="slider1Label">Mění se dle textury</label><br>
</div>
<div id="slider1Div"><input class="slider" disabled id="slider1" type="range"><br></div>
<div id="slider2LabelDiv"><label for="slider2" id="slider2Label"></label><br></div>
<div id="slider2Div"><input class="slider" disabled id="slider2" type="range"><br></div>
<div id="slider3LabelDiv"><label for="slider3" id="slider3Label"></label><br></div>
<div id="slider3Div"><input class="slider" disabled id="slider3" type="range"><br></div>
<div id="slider4LabelDiv"><label for="slider4" id="slider4Label"></label><br></div>
<div id="slider4Div"><input class="slider" disabled id="slider4" type="range"><br></div>
<div id="slider5LabelDiv"><label for="slider5" id="slider5Label"></label><br></div>
<div id="slider5Div"><input class="slider" disabled id="slider5" type="range"><br></div>
</form>
</div>
</div>
<div class="boxCode">
<b>Kód pro vykreslení textury</b>
<div class="code" id="code">/* Vyber texturu */</div>
</div>
</div>
<div class="boxCanvas">
<canvas class="canvas" height="450" id="myCanvas" style="border:1px solid" width="450"></canvas>
</div>
<div class="boxCodeUsed">
<b>Výpis funkcí použitých v kódu</b>
<div class="code" id="usedCode">/* Použité funkce */</div>
</div>
</div>
<script type='text/javascript'>
// Vychází z kódu "A canvas demo by Kas Thomas. http://asserttrue.blogspot.com/2012/01/turbulence-in-html5-canvas.html"
canvas = document.getElementById("myCanvas");
context = canvas.getContext("2d");
function drawViaCallback() {
let w = canvas.width;
let h = canvas.height;
let canvasData = context.getImageData(0, 0, w, h);
for (let idx, x = 0; x < w; x++) {
for (let y = 0; y < h; y++) {
// Index pixelu v poli
idx = (x + y * w) * 4;
// Hodnoty RGB
let r = canvasData.data[idx + 0];
let g = canvasData.data[idx + 1];
let b = canvasData.data[idx + 2];
let pixel = callback([r, g, b], x, y, w, h);
canvasData.data[idx + 0] = pixel[0];
canvasData.data[idx + 1] = pixel[1];
canvasData.data[idx + 2] = pixel[2];
}
}
context.putImageData(canvasData, 0, 0);
}
function fillCanvas(color) {
context.fillStyle = color;
context.fillRect(0, 0, canvas.width, canvas.height);
}
function doPixelLoop(code) {
let f = "callback = function( pixel,x,y,w,h )" +
" { r=pixel[0];g=pixel[1];b=pixel[2];" +
code + " return [r,g,b]; }";
try {
eval(f);
fillCanvas("#FFFFFF");
drawViaCallback();
} catch (e) {
alert("Error: " + e.toString());
}
}
// Port Java kódu Kena Perlina
PerlinNoise = new function () {
let p = new Array(512);
let permutation = [151, 160, 137, 91, 90, 15,
131, 13, 201, 95, 96, 53, 194, 233, 7, 225, 140, 36, 103, 30, 69, 142, 8, 99, 37, 240, 21, 10, 23,
190, 6, 148, 247, 120, 234, 75, 0, 26, 197, 62, 94, 252, 219, 203, 117, 35, 11, 32, 57, 177, 33,
88, 237, 149, 56, 87, 174, 20, 125, 136, 171, 168, 68, 175, 74, 165, 71, 134, 139, 48, 27, 166,
77, 146, 158, 231, 83, 111, 229, 122, 60, 211, 133, 230, 220, 105, 92, 41, 55, 46, 245, 40, 244,
102, 143, 54, 65, 25, 63, 161, 1, 216, 80, 73, 209, 76, 132, 187, 208, 89, 18, 169, 200, 196,
135, 130, 116, 188, 159, 86, 164, 100, 109, 198, 173, 186, 3, 64, 52, 217, 226, 250, 124, 123,
5, 202, 38, 147, 118, 126, 255, 82, 85, 212, 207, 206, 59, 227, 47, 16, 58, 17, 182, 189, 28, 42,
223, 183, 170, 213, 119, 248, 152, 2, 44, 154, 163, 70, 221, 153, 101, 155, 167, 43, 172, 9,
129, 22, 39, 253, 19, 98, 108, 110, 79, 113, 224, 232, 178, 185, 112, 104, 218, 246, 97, 228,
251, 34, 242, 193, 238, 210, 144, 12, 191, 179, 162, 241, 81, 51, 145, 235, 249, 14, 239, 107,
49, 192, 214, 31, 181, 199, 106, 157, 184, 84, 204, 176, 115, 121, 50, 45, 127, 4, 150, 254,
138, 236, 205, 93, 222, 114, 67, 29, 24, 72, 243, 141, 128, 195, 78, 66, 215, 61, 156, 180
];
for (let i = 0; i < 256; i++)
p[256 + i] = p[i] = permutation[i];
this.noise = function (x, y, z) {
let X = Math.floor(x) & 255, // Najdi jednotkovou krychli, která obsahuje bod
Y = Math.floor(y) & 255,
Z = Math.floor(z) & 255;
x -= Math.floor(x); // Najdi relativní X, Y, Z bodu v krychli
y -= Math.floor(y);
z -= Math.floor(z);
let u = this.fade(x), // Vypočti relativní křivky slábnutí pro každý z X, Y, Z
v = this.fade(y),
w = this.fade(z);
let A = p[X] + Y, AA = p[A] + Z, AB = p[A + 1] + Z, // Hašuj souřadnice osmi rohů krychle
B = p[X + 1] + Y, BA = p[B] + Z, BB = p[B + 1] + Z;
return this.scale(this.lerp(w, this.lerp(v, this.lerp(u, this.grad(p[AA], x, y, z), // a přidej
this.grad(p[BA], x - 1, y, z)), // smíchané
this.lerp(u, this.grad(p[AB], x, y - 1, z), // výsledky
this.grad(p[BB], x - 1, y - 1, z))),// z osmi
this.lerp(v, this.lerp(u, this.grad(p[AA + 1], x, y, z - 1), // rohů
this.grad(p[BA + 1], x - 1, y, z - 1)), // krychle
this.lerp(u, this.grad(p[AB + 1], x, y - 1, z - 1),
this.grad(p[BB + 1], x - 1, y - 1, z - 1)))));
};
this.fade = function (t) {
return t * t * t * (t * (t * 6 - 15) + 10);
}
this.lerp = function (t, a, b) {
return a + t * (b - a);
}
this.grad = function (hash, x, y, z) {
let h = hash & 15; // Konvertuj 4 bity hash kódu na 12 gradientních vektorů
let u = h < 8 ? x : y,
v = h < 4 ? y : h === 12 || h === 14 ? x : z;
return ((h & 1) === 0 ? u : -u) + ((h & 2) === 0 ? v : -v);
}
this.scale = function (n) {
return (1 + n) / 2;
}
};
function turbulence(x, y, z, octaves) {
let t = 0;
let f = 1;
let n = 0;
for (let i = 0; i < octaves; i++, f *= 2) {
n += PerlinNoise.noise(x * f, y * f, z) / f;
t += 1 / f;
}
return n / t; // Přepočítej zpět na rozsah {0,1}
}
function snoise(x, y, z, persistence, octaves) {
let t = 0;
let f = 1;
let n = 0;
for (let i = 0; i < octaves; i++, f *= 2) {
n += Math.pow(persistence, i) * PerlinNoise.noise(x * f, y * f, z) / f;
t += 1 / f;
}
return n / t; // Přepočítej zpět na rozsah {0,1}
}
function ramp(x) { // Rampa
return (1 / 2) * (1 + Math.sin(x));
}
function marble(x, y, z, persistence, octaves, influence) { // Mramor
return ramp(influence * snoise(x, y, z, persistence, octaves));
}
function bias(a, b) { // Perlinova funkce zkreslení
return Math.pow(a, Math.log(b) / Math.log(0.5));
}
const slider1 = document.getElementById("slider1");
const slider2 = document.getElementById("slider2");
displaySlider(slider2, false);
const slider3 = document.getElementById("slider3");
displaySlider(slider3, false);
const slider4 = document.getElementById("slider4");
displaySlider(slider4, false);
const slider5 = document.getElementById("slider5");
displaySlider(slider5, false);
function displaySlider(slider, display) {
let label = getLabelID(slider);
let sliderDiv = document.getElementById(slider.id + "Div");
let labelDiv = document.getElementById(slider.id + "LabelDiv");
if (display === undefined) {
slider.style.display = "inline";
sliderDiv.style.display = "inline";
label.style.display = "inline";
labelDiv.style.display = "inline";
} else if (display) {
slider.style.display = "inline";
sliderDiv.style.display = "inline";
label.style.display = "inline";
labelDiv.style.display = "inline";
} else {
slider.style.display = "none";
sliderDiv.style.display = "none";
label.style.display = "none";
labelDiv.style.display = "none";
}
}
function setSlider(slider, min, max, step, value, labelText, color, display) {
let label = getLabelID(slider);
if (color === undefined) {
color = "black";
}
slider.removeAttribute("disabled");
slider.min = min;
slider.max = max;
slider.step = step;
slider.defaultValue = value;
slider.value = value;
slider.color = color;
setSliderTitle(slider);
label.style.color = color;
label.innerText = labelText;
displaySlider(slider, display)
}
function setChosenTexture() {
for (let i = 0, length = selectElement.length; i < length; i++) {
if (selectElement[i].checked) {
switch (i) {
case 0:
texture1Set();
break;
case 1:
texture2Set();
break;
case 2:
texture3Set();
break;
case 3:
texture4Set();
break;
case 4:
texture5Set();
break;
}
break;
}
}
}
function drawChosenTexture() {
for (let i = 0, length = selectElement.length; i < length; i++) {
if (selectElement[i].checked) {
switch (i) {
case 0:
texture1Draw();
break;
case 1:
texture2Draw();
break;
case 2:
texture3Draw();
break;
case 3:
texture4Draw();
break;
case 4:
texture5Draw();
break;
}
break;
}
}
}
function replaceAll(str, find, replace) {
return str.replace(new RegExp(find, 'g'), replace);
}
function getLabelID(slider) {
return document.getElementById(slider.id + "Label");
}
function getSliderlColor(slider) {
let label = getLabelID(slider);
return label.style.color;
}
function setSliderTitle(slider) {
slider.setAttribute("title", "aktuálně: " + slider.value + ", výchozí: " + slider.defaultValue);
}
function extractCodeCanvas(kod) {
kod = replaceAll(kod, "\n", "<br>");
kod = replaceAll(kod, "slider1", "<span style='color:" + getSliderlColor(slider1) + "'>" + slider1.value + "</span>");
kod = replaceAll(kod, "slider2", "<span style='color:" + getSliderlColor(slider2) + "'>" + slider2.value + "</span>");
kod = replaceAll(kod, "slider3", "<span style='color:" + getSliderlColor(slider3) + "'>" + slider3.value + "</span>");
kod = replaceAll(kod, "slider4", "<span style='color:" + getSliderlColor(slider4) + "'>" + slider4.value + "</span>");
kod = replaceAll(kod, "slider5", "<span style='color:" + getSliderlColor(slider5) + "'>" + slider5.value + "</span>");
document.getElementById('code').innerHTML = kod;
}
function drawCodeCanvas(kod) {
kod = replaceAll(kod, "slider1", slider1.value);
kod = replaceAll(kod, "slider2", slider2.value);
kod = replaceAll(kod, "slider3", slider3.value);
kod = replaceAll(kod, "slider4", slider4.value);
kod = replaceAll(kod, "slider5", slider5.value);
doPixelLoop(kod);
}
function extractUsedCode(pouzityKod) {
pouzityKod = replaceAll(pouzityKod, "\n", "<br>");
document.getElementById('usedCode').innerHTML = pouzityKod;
}
function texture1Set() {
setSlider(slider1, 0, 100, 1, 50, "Velikost", "orange");
setSlider(slider2, 0, 1, .1, .5, "Osa X", "red");
setSlider(slider3, 0, 1, .1, .5, "Osa Y", "green");
setSlider(slider4, 0, 1, .1, .5, "Osa Z", "blue");
displaySlider(slider5, false);
extractUsedCode("PerlinNoise.noise = " + replaceAll(PerlinNoise.noise.toString(), "this.", "")
+ "<hr>fade = " + PerlinNoise.fade.toString()
+ "<hr>scale = " + PerlinNoise.scale.toString()
+ "<hr>lerp = " + PerlinNoise.lerp.toString()
+ "<hr>grad = " + PerlinNoise.grad.toString());
}
function texture1Draw() {
const kod = "x /= w;\n" +
"y /= h;\n" +
"n = PerlinNoise.noise(slider1 * x * slider2, slider1 * y * slider3, slider4);\n" +
"r = g = b = 255 * n;";
extractCodeCanvas(kod);
drawCodeCanvas(kod);
}
function texture2Set() {
setSlider(slider1, 1, 100, 1, 50, "Velikost", "orange");
setSlider(slider2, 0, 1, .1, .5, "Osa X", "red");
setSlider(slider3, 0, 1, .1, .5, "Osa Y", "green");
setSlider(slider4, 0, 1, .1, .5, "Osa Z", "blue");
setSlider(slider5, 1, 10, 1, 5, "Počet oktáv", "violet");
extractUsedCode(turbulence.toString()
+ "<hr>PerlinNoise.noise = " + replaceAll(PerlinNoise.noise.toString(), "this.", "")
+ "<hr>fade = " + PerlinNoise.fade.toString()
+ "<hr>scale = " + PerlinNoise.scale.toString()
+ "<hr>lerp = " + PerlinNoise.lerp.toString()
+ "<hr>grad = " + PerlinNoise.grad.toString());
}
function texture2Draw() {
const kod = "x /= w;\n " +
"y /= h;\n" +
"n = turbulence(slider1*x*slider2,slider1*y*slider3,slider4,slider5);\n" +
"r = g = b = 255 * n;";
extractCodeCanvas(kod);
drawCodeCanvas(kod);
}
function texture3Set() {
setSlider(slider1, 1, 100, 1, 10, "Velikost", "orange");
setSlider(slider2, 0, 1, .1, .9, "Persistence", "red");
setSlider(slider3, 1, 10, 1, 7, "Počet oktáv", "green");
setSlider(slider4, 0, 1, .1, .6, "Osa Z", "blue");
setSlider(slider5, 1, 100, 1, 44, "Síla vlivu", "violet");
extractUsedCode(marble.toString() + "<hr>"
+ ramp.toString()
+ "<hr>" + snoise.toString()
+ "<hr>PerlinNoise.noise = " + replaceAll(PerlinNoise.noise.toString(), "this.", "")
+ "<hr>fade = " + PerlinNoise.fade.toString()
+ "<hr>scale = " + PerlinNoise.scale.toString()
+ "<hr>lerp = " + PerlinNoise.lerp.toString()
+ "<hr>grad = " + PerlinNoise.grad.toString());
}
function texture3Draw() {
const kod = "x /= w;\n" +
"y /= h;\n" +
"n = marble(slider1 * x, slider1 * y, slider4, slider2, slider3, slider5);\n" +
"r = g = b = 255 * n;";
extractCodeCanvas(kod);
drawCodeCanvas(kod);
}
function texture4Set() {
setSlider(slider1, 0.1, 10, .1, 1, "Velikost", "orange");
setSlider(slider2, 1, 1000, 1, 89, "Roztažení osy X", "red");
setSlider(slider3, 1, 1000, 1, 800, "Roztažení osy Y", "green");
setSlider(slider4, 0, 1, .01, .74, "Osa Z", "blue");
setSlider(slider5, 1, 1000, 1, 48, "Jemnost textury", "violet");
extractUsedCode("PerlinNoise.noise = " + replaceAll(PerlinNoise.noise.toString(), "this.", "")
+ "<hr>fade = " + PerlinNoise.fade.toString()
+ "<hr>scale = " + PerlinNoise.scale.toString()
+ "<hr>lerp = " + PerlinNoise.lerp.toString()
+ "<hr>grad = " + PerlinNoise.grad.toString());
}
function texture4Draw() {
const kod = "n = PerlinNoise.noise(slider1*x/slider2,slider1*y/slider3, slider4);\n" +
"n = Math.cos(n*slider5);\n" +
"base = Math.abs(Math.round(n * 255)); // Základ\n" +
"r = base + 54;\n" +
"b = base - 108;\n" +
"g = base - 23;";
extractCodeCanvas(kod);
drawCodeCanvas(kod);
}
function texture5Set() {
setSlider(slider1, 1, 100, 1, 5, "Velikost", "orange");
setSlider(slider2, 0, 1, .1, .4, "Rozprostření mraků", "red");
setSlider(slider3, 1, 5, 0.1, 1.8, "Roztažení osy Y", "green");
setSlider(slider4, 1, 5, 1, 3, "Počet oktáv", "blue");
setSlider(slider5, 0.1, 5, .01, 0.9, "Nastavení zelené", "violet");
extractUsedCode(turbulence.toString() + "<hr>"
+ bias.toString() + "<hr>"
+ "PerlinNoise.noise = " + replaceAll(PerlinNoise.noise.toString(), "this.", "")
+ "<hr>fade = " + PerlinNoise.fade.toString()
+ "<hr>scale = " + PerlinNoise.scale.toString()
+ "<hr>lerp = " + PerlinNoise.lerp.toString()
+ "<hr>grad = " + PerlinNoise.grad.toString());
}
function texture5Draw() {
const kod = "x /= w;\n" +
"y /= h;\n" +
"y = 1 - bias(y,slider2);\n" +
"n = turbulence(slider1*x,slider3*slider1*y,1-y,slider4);\n" +
"y = Math.sqrt(y);\n" +
"r = bias(y,.68) * n * 255; \n" +
"g = r/slider5;\n" +
"b = 255 - r/2;";
extractCodeCanvas(kod);
drawCodeCanvas(kod);
}
const selectElement = document.querySelector('.textura');
selectElement.addEventListener('change', (event) => {
setChosenTexture();
drawChosenTexture();
});
slider1.addEventListener('change', (event) => {
drawChosenTexture();
setSliderTitle(slider1);
});
slider2.addEventListener('change', (event) => {
drawChosenTexture();
setSliderTitle(slider2);
});
slider3.addEventListener('change', (event) => {
drawChosenTexture();
setSliderTitle(slider3);
});
slider4.addEventListener('change', (event) => {
drawChosenTexture();
setSliderTitle(slider4);
});
slider5.addEventListener('change', (event) => {
drawChosenTexture();
setSliderTitle(slider5);
});
var event = document.createEvent('Event');
event.initEvent('change', true, true);
selectElement.dispatchEvent(event);
</script>
</body>
</html>