Random Normal

Developer
Andi Smithers
Size
3,668 Kb
Views
22,264
  1. Random Normal Previews
  2. Random Normal HTML Codes
  3. Random Normal CSS Codes
  4. Random Normal JS Codes

How do I make an random normal?

I call this Random Normal as it effectively generates randomized unit vectors uniformly distributed. . What is a random normal? How do you make a random normal? This script and codes were developed by Andi Smithers on 21 November 2022, Monday.

Random Normal Previews
IQ Test

Random Normal - Script Codes HTML Codes

<!DOCTYPE html>
<html >
<head> <meta charset="UTF-8"> <title>Random Normal</title> <link rel="stylesheet" href="css/style.css">
</head>
<body> <body> <canvas id='uniform distribution''></canvas>
</body> <script src="js/index.js"></script>
</body>
</html>

Random Normal - Script Codes CSS Codes

body{ background: #000000; margin: 0px; padding: 0px;
}

Random Normal - Script Codes JS Codes

/*****************************************************************************
The MIT License (MIT)
Copyright (c) 2014 Andi Smithers
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*****************************************************************************/
// conceptualized and written by andi smithers
// constant options
const focalDepth = 80;
const focalPoint = 256;
// variables
var centreX;
var centreY;
var mouseX;
var mouseY;
var spawnX;
var spawnY;
var frameCount=0;
// variables
const maxpoints = 4096;
var pointcloud = [];
// uniform distribution of a randomized unit vector
function RandomNormal()
{ var theta = Math.random() * Math.PI * 2; var nz = 1 - 2*Math.random(); var phi = Math.acos(nz); var nx = Math.sin(theta)*Math.sin(phi); var ny = Math.cos(theta)*Math.sin(phi); return {x:nx, y:ny, z:nz};
}
function InitRandomDistribution()
{ for (var i=0; i<maxpoints;i++) { pointcloud.push(RandomNormal()); }
}
var theta = 0;
var phi = 0;
function RenderRandomDistribution()
{ theta+=0.01; phi+=0.01; var scale = 20* canvas.height/500; context.beginPath(); for (var i=0; i<pointcloud.length; i++) { var point = pointcloud[i]; var x1 = point.x * Math.cos(theta) - point.z*Math.sin(theta); var z1 = point.x * Math.sin(theta) + point.z*Math.cos(theta); var y1 = point.y * Math.cos(phi) - z1*Math.sin(phi); var z1 = point.y * Math.sin(phi) + z1*Math.cos(phi); x1*=scale; z1*=scale; y1*=scale; if (z1+focalDepth<0) continue; var depth = focalPoint*3 / (z1 + focalDepth ); var x = x1 * depth + centreX; var y = y1 * depth + centreY; var sz = depth * 0.2; // fill a rect context.rect(x,y, sz, sz); } context.fillStyle = '#ffffff'; context.fill();
}
// initialization
function init()
{ // setup canvas and context
canvas = document.getElementById('uniform distribution');
context = canvas.getContext('2d'); // set canvas to be window dimensions resize(); // create event listeners canvas.addEventListener('mousemove', mouseMove); canvas.addEventListener('click', mouseClick); window.addEventListener('resize', resize); // initialze variables InitRandomDistribution();
}
// input functions
function mouseMove(event)
{
var rect = canvas.getBoundingClientRect();
mouseX = event.clientX - rect.left,
mouseY = event.clientY - rect.top
}
function mouseClick()
{
}
function resize()
{ canvas.width = window.innerWidth; canvas.height = window.innerHeight; // compute centre of screen centreX = canvas.width/2; centreY = canvas.height/2;
}
// rendering functions
function render()
{ context.fillStyle = 'black'; context.clearRect(0, 0, canvas.width, canvas.height); RenderRandomDistribution(); context.globalAlpha = 1.0; context.font = '20pt Calibri'; context.fillStyle = 'rgb(255,255,0)'; context.textAlign = "center"; context.fillText('Random Normal', canvas.width/2, 25); context.fillText('Or randomized unit vector with a uniform distribution', canvas.width/2, 45); context.fillText('alternatively, even distribution of points on a the surface of a sphere', canvas.width/2, canvas.height-25);
}
// movement functions
function update()
{
}
// per frame tick functions
function animate()
{ frameCount++; // movement update update(); // render update render(); // trigger next frame requestAnimationFrame(animate);
}
// entry point
init();
animate();</script>
Random Normal - Script Codes
Random Normal - Script Codes
Home Page Home
Developer Andi Smithers
Username Bolloxim
Uploaded November 21, 2022
Rating 4
Size 3,668 Kb
Views 22,264
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