Landscape

Developer
Endre Simo
Size
3,792 Kb
Views
24,288
  1. Landscape Previews
  2. Landscape HTML Codes
  3. Landscape CSS Codes
  4. Landscape JS Codes

How do I make an landscape?

A little generative landscape. Play with values to obtain different shapes and forms. What is a landscape? How do you make a landscape? This script and codes were developed by Endre Simo on 28 November 2022, Monday.

Landscape Previews
IQ Test

Landscape - Script Codes HTML Codes

<!DOCTYPE html>
<html >
<head> <meta charset="UTF-8"> <title>Landscape</title> <link rel="stylesheet" href="css/style.css">
</head>
<body> <div class="context"></div>
<div id="gui"></div> <script src='https://cdnjs.cloudflare.com/ajax/libs/dat-gui/0.5/dat.gui.min.js'></script> <script src="js/index.js"></script>
</body>
</html>

Landscape - Script Codes CSS Codes

html, body { background: #111; margin: 0; padding: 0; -webkit-user-select: none; -moz-user-select: none; -khtml-user-select: none; user-select: none;
}
.context #canvas { position: relative; width: 100%; height: 100%;
}
#gui { position: relative; margin: 0 auto; width: 22%;
}

Landscape - Script Codes JS Codes

(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); };
}());
function Landscape() { var canvas = document.createElement('canvas'); canvas.setAttribute('width', '1200'); canvas.setAttribute('height', '600'); canvas.setAttribute('id', 'canvas'); var mainContext = document.getElementsByClassName('context')[0]; mainContext.appendChild(canvas); var ctx = canvas.getContext('2d'); var gradient; // Global variables this.centerZ = GUI.centerZ; this.focalLength = GUI.focalLength; this.zIndex = GUI.zIndex; this.zRes = GUI.zRes; this.color = GUI.color; this.canvas = canvas; this.hexToRgb = function(hex) { // Expand shorthand form (e.g. "03F") to full form (e.g. "0033FF") var shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i; hex = hex.replace(shorthandRegex, function(m, r, g, b) { return r + r + g + g + b + b; }); var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex); return result ? { r: parseInt(result[1], 16), g: parseInt(result[2], 16), b: parseInt(result[3], 16) } : null; }; this.init = function() { this.width = canvas.width; this.height = canvas.height; this.centerX = this.width / 2; this.centerY = this.height / 2; this.timer = null; var radius = 0.7 * Math.sqrt(Math.pow(this.width, 2), Math.pow(this.height), 2); gradient = ctx.createRadialGradient(this.width * .5, this.height * .5, this.width * .25, this.width * .5, this.height *.5, radius); gradient.addColorStop(0, '#E2E2E2'); gradient.addColorStop(1, 'rgba(190,190,190, 0.8)'); ctx.fillStyle = gradient; ctx.fillRect(0,0,this.width, this.height); ctx.moveTo(0,0); }; this.reset = function() { this.centerZ = GUI.centerZ; this.focalLength = GUI.focalLength; this.zIndex = GUI.zIndex; this.zRes = GUI.zRes; this.color = GUI.color; ctx.fillStyle = gradient; ctx.clearRect(0,0,this.width,this.height); ctx.fillRect(0,0,this.width,this.height); } this.draw = function() { var self = this; this.drawLine(); this.timer = window.requestAnimationFrame(function() { self.draw(); }); }; this.drawLine = function() { if(this.zIndex > -this.focalLength) { var scale = this.focalLength / (this.focalLength + this.zIndex); var x1 = this.centerX - this.width / scale >> 0 * 0.2; var x2 = this.centerX + this.width / scale >> 0 * 0.2; var y = this.centerY + (Math.random() * GUI.roughness + 100) * scale; ctx.beginPath(); ctx.strokeStyle = 'rgba(' + this.hexToRgb(GUI.color).r + ',' + this.hexToRgb(GUI.color).g + ',' + this.hexToRgb(GUI.color).b + ', 0.15)'; ctx.moveTo(x1, y); for (var x = x1; x < x2; x += GUI.zRes) { var y = this.centerY + (Math.random() * GUI.roughness + 100) * scale ctx.lineTo(x, this.getLineDistance(x, this.zIndex / y * GUI.distanceField) * scale); } //ctx.lineTo(x, this.height); //ctx.lineTo(0, this.height); ctx.stroke(); ctx.closePath(); this.zIndex -= this.zRes; } else { window.cancelAnimationFrame(this.timer); } }; this.getLineDistance = function (x, z) { var x1 = Math.abs(x - this.centerX); var z1 = Math.abs(z - this.centerZ); var dist1 = Math.sqrt(x1 * x1 + z1 * z1); var x2 = Math.abs(x1 - this.centerX); var z2 = Math.abs(z1 - this.centerZ); var dist2 = Math.sqrt(x2 * x2 + z2 * z2); var angle = Math.atan2(z2, x2); return this.centerY + GUI.centerY + Math.sin(dist1 * GUI.xFactor) * (angle * 180 / Math.PI) + Math.cos(dist2 * GUI.yFactor) * (angle * 180 / Math.PI) - (this.zIndex - dist2) / dist1 + Math.random() * 0.5; };
};
var GUI = new function() { this.centerZ = 350; this.centerY = 500; this.focalLength = 400; this.zIndex = 3500; this.zRes = 6; this.color = "#000"; this.roughness = 3; this.distanceField = 75; this.xFactor = 0.07; this.yFactor = 0.02; return this;
}
var gui = new dat.GUI({autoPlace:false, width: 220, align: "left"});
gui.domElement.style.position = 'absolute';
gui.domElement.style.left = '0';
gui.domElement.style.top = '0';
var datGUI = document.getElementById('gui');
console.log(datGUI);
datGUI.parentNode.insertBefore(gui.domElement, datGUI);
var landscape = new Landscape();
var gs = gui.addFolder('General settings');
gs.add(GUI,'focalLength').min(250).max(500).step(10).name('Focal Length').onChange(function(value){landscape.reset()});
gs.add(GUI,'centerZ').min(100).max(400).step(50).name('Z Center').onChange(function(value){landscape.reset()});
gs.add(GUI,'centerY').min(200).max(600).step(50).name('Y Center').onChange(function(value){landscape.reset()});
gs.add(GUI,'zIndex').min(3000).max(5000).step(100).name('Z index').onChange(function(value){landscape.reset()});
gs.add(GUI,'zRes').min(2).max(10).step(1).name('Resolution').onChange(function(value){ zRes = value; landscape.reset()});
gs.addColor(GUI, 'color').name('Color').onChange(function(value){landscape.reset()});
var pattern = gui.addFolder('Pattern settings');
pattern.add(GUI,'roughness').min(0).max(25).step(1).name('Line Roughness').onChange(function(value){landscape.reset()});
pattern.add(GUI,'distanceField').min(20).max(100).step(5).name('Distance Field').onChange(function(value){landscape.reset()});
pattern.add(GUI,'xFactor').min(0.01).max(0.18).step(0.01).name('X-factor').onChange(function(value){landscape.reset()});
pattern.add(GUI,'yFactor').min(0.01).max(0.04).step(0.01).name('Y-factor').onChange(function(value){landscape.reset()});
pattern.open();
window.addEventListener('resize', function() { window.cancelAnimationFrame(landscape.timer); landscape.reset(); landscape.draw();
});
canvas.addEventListener('click', function() { window.cancelAnimationFrame(landscape.timer); landscape.reset(); landscape.draw();
});
landscape.init();
landscape.draw();
Landscape - Script Codes
Landscape - Script Codes
Home Page Home
Developer Endre Simo
Username esimov
Uploaded November 28, 2022
Rating 4
Size 3,792 Kb
Views 24,288
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