Animated cone/cylinder

Developer
Andi Smithers
Size
4,466 Kb
Views
16,192
  1. Animated cone/cylinder Previews
  2. Animated cone/cylinder HTML Codes
  3. Animated cone/cylinder CSS Codes
  4. Animated cone/cylinder JS Codes

How do I make an animated cone/cylinder?

Combines two half hemispheres and connects them with cylinder that has a negative radius on one end forcing a conical shape to generate. What is a animated cone/cylinder? How do you make a animated cone/cylinder? This script and codes were developed by Andi Smithers on 21 November 2022, Monday.

Animated cone/cylinder Previews
IQ Test

Animated cone/cylinder - Script Codes HTML Codes

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

Animated cone/cylinder - Script Codes CSS Codes

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

Animated cone/cylinder - 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;
// test multiple groups
// initialization
function init()
{ // setup canvas and context	canvas = document.getElementById('cone-cylinder');	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
}
// 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
var demoAngle = Math.PI*1.44;
function render()
{ context.fillStyle = 'black'; context.clearRect(0, 0, canvas.width, canvas.height); var x = centreX; var y = centreY; var r = 200; demoAngle=(demoAngle+0.01)%(Math.PI*2); RenderBasestar(x, y, r, demoAngle); context.globalAlpha = 1.0; context.font = '20pt Calibri'; context.fillStyle = 'rgb(255,255,255)'; context.textAlign = "center"; context.fillText('3D Cylinder/Cone rendering on a 2D canvas', canvas.width/2, 40); context.fillText('Basestar for star-raiders', canvas.width/2, canvas.height-80); context.fillText('combines 2 hemispheres an inverted cylinder with r, -r', canvas.width/2, canvas.height-60); context.fillText('plus 2 side cylinders at the side to show well cylinders', canvas.width/2, canvas.height-40);
}
// star base construction - eer well it was but its a cool blue marble demo for now
// to rotate horizontally switch out the x/y registers. I should probably make this generic .. however just want to use this for the starbase construction in star-raiders var lazerLength = 50; var lazerAngle = 0;
function RenderBasestar(x, y, r, baseAngle)
{ var len = 20; r = 100; var r2 = -100; // compute y var y1 = y+len*2*Math.cos(baseAngle+Math.PI*0.5); var y2 = y-len*2*Math.cos(baseAngle+Math.PI*0.5); if (baseAngle<Math.PI*0.5 || baseAngle>Math.PI*1.5) { RenderHemisphere(x, y2, r, baseAngle, '#808080', '#808080'); RenderCylinder(x, y, r2, r, len*2, baseAngle, '#808080', '#808080', 'darkred'); RenderLazers(x,y,baseAngle); RenderHemisphere(x, y1, r, (baseAngle+Math.PI)%(Math.PI*2),'#808080', '#808080'); } else { RenderHemisphere(x, y1, r, (baseAngle+Math.PI)%(Math.PI*2), '#808080', '#808080'); RenderCylinder(x, y, r2, r, len*2, baseAngle, '#808080', '#808080', 'darkred'); RenderLazers(x,y,baseAngle); RenderHemisphere(x, y2, r, baseAngle, '#808080', '#808080'); }
}
function RenderLazers(x,y, baseAngle)
{
// context.rotate(Math.PI*0.5); // context.translate(-x+y,-y-x); var r = 10; var r2 = 10; var y3 = y; RenderCylinder(x-150, y3, r2, r, lazerLength, baseAngle+Math.PI*0.5, 'rgba(255,255,0,1)','rgba(255,128,0,1)','rgba(255,0,0,1)'); RenderCylinder(x+150, y3, r2, r, lazerLength, baseAngle+Math.PI*0.5, 'rgba(255,255,0,1)','rgba(255,128,0,1)','rgba(255,0,0,1)');
}
function RenderHemisphere(x, y, r, angle, colTop, colBot)
{ // rotation m = 0.5522848; tr =r*Math.cos(angle)*0.5; // top hemisphere angle *rad br =r*Math.cos(angle)*0.5; // bottom angle *rad xkr = m*r; // kappa * r tkr = m*tr; // top height * kappa bkr = m*br; // bottom height * kappa context.beginPath() context.moveTo(x+r, y) context.bezierCurveTo(x+r, y-tkr, x+xkr, y-tr, x, y-tr) // top r context.bezierCurveTo(x-xkr, y-tr, x-r, y-tkr, x-r, y) // top l context.bezierCurveTo(x-r, y+bkr, x-xkr, y+br, x, y+br) // bot l context.bezierCurveTo(x+xkr, y+br, x+r, y+bkr, x+r, y) // bot r context.closePath(); context.lineWidth = 1; context.fillStyle = colBot; context.fill(); // drow the blue surface tr =r*Math.cos(angle+Math.PI); // top hemisphere angle *rad br =r*Math.cos(angle+Math.PI); // bottom angle *rad if (angle<Math.PI) br = r*0.5; if (angle>Math.PI) tr = r*0.5; xkr = m*r; // kappa * r tkr = m*tr; // top height * kappa bkr = m*br; // bottom height * kappa context.beginPath() context.moveTo(x+r, y) context.bezierCurveTo(x+r, y-tkr, x+xkr, y-tr, x, y-tr) // top r context.bezierCurveTo(x-xkr, y-tr, x-r, y-tkr, x-r, y) // top l context.bezierCurveTo(x-r, y+bkr, x-xkr, y+br, x, y+br) // bot l context.bezierCurveTo(x+xkr, y+br, x+r, y+bkr, x+r, y) // bot r context.closePath(); context.lineWidth = 1; context.fillStyle = colTop; context.fill();
}
function RenderCylinder(x, y, r1, r2, side, angle, colTop, colBot, colSide)
{ // rotation var m = 0.5522848; var tr =r1*Math.cos(angle); // top hemisphere angle *rad var br =r1*Math.cos(angle); // bottom angle *rad var xkr = m*r1; // kappa * r var tkr = m*tr; // top height * kappa var bkr = m*br; // bottom height * kappa var y1 = y - side* Math.sin(angle); // drow the blue surface var tr2 =r2*Math.cos(angle); // top hemisphere angle *rad var br2 =r2*Math.cos(angle); // bottom angle *rad var xkr2 = m*r2; // kappa * r var tkr2 = m*tr2; // top height * kappa var bkr2 = m*br2; // bottom height * kappa // compute x, y var y2 = y + side*Math.sin(angle); // render front side context.beginPath(); context.moveTo(x+r1, y1) context.bezierCurveTo(x+r1, y1-tkr, x+xkr, y1-tr, x, y1-tr) // top r context.bezierCurveTo(x-xkr, y1-tr, x-r1, y1-tkr, x-r1, y1) // top l context.lineTo(x-r2, y2); context.bezierCurveTo(x-r2, y2-bkr2, x-xkr2, y2-br2, x, y2-br2) // bot l context.bezierCurveTo(x+xkr2, y2-br2, x+r2, y2-bkr2, x+r2, y2) // bot r context.closePath();
// context.fillStyle = colSide; var gradient = context.createRadialGradient(x, y, 0, x, y, Math.abs(r1)); gradient.addColorStop(0, 'red'); gradient.addColorStop(1, '#404040'); context.fillStyle = gradient; context.fill(); context.beginPath(); context.moveTo(x+r1, y1) context.bezierCurveTo(x+r1, y1+tkr, x+xkr, y1+tr, x, y1+tr) // top r context.bezierCurveTo(x-xkr, y1+tr, x-r1, y1+tkr, x-r1, y1) // top l context.lineTo(x-r2, y2); context.bezierCurveTo(x-r2, y2+bkr2, x-xkr2, y2+br2, x, y2+br2) // bot l context.bezierCurveTo(x+xkr2, y2+br2, x+r2, y2+bkr2, x+r2, y2) // bot r context.closePath();
// context.fillStyle = colSide; context.fillStyle = gradient; context.fill(); if (angle>Math.PI*0.5 && angle<Math.PI*1.5) { context.beginPath() context.moveTo(x+r2, y2) context.bezierCurveTo(x+r2, y2-tkr2, x+xkr2, y2-tr2, x, y2-tr2) // top r context.bezierCurveTo(x-xkr2, y2-tr2, x-r2, y2-tkr2, x-r2, y2) // top l context.bezierCurveTo(x-r2, y2+bkr2, x-xkr2, y2+br2, x, y2+br2) // bot l context.bezierCurveTo(x+xkr2, y2+br2, x+r2, y2+bkr2, x+r2, y2) // bot r context.closePath(); context.lineWidth = 0; context.fillStyle = colTop; context.fill(); } else { context.beginPath() context.moveTo(x+r1, y1) context.bezierCurveTo(x+r1, y1-tkr, x+xkr, y1-tr, x, y1-tr) // top r context.bezierCurveTo(x-xkr, y1-tr, x-r1, y1-tkr, x-r1, y1) // top l context.bezierCurveTo(x-r1, y1+bkr, x-xkr, y1+br, x, y1+br) // bot l context.bezierCurveTo(x+xkr, y1+br, x+r1, y1+bkr, x+r1, y1) // bot r context.closePath(); context.lineWidth = 1; context.fillStyle = colBot; context.fill(); }
}
// 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();
Animated cone/cylinder - Script Codes
Animated cone/cylinder - Script Codes
Home Page Home
Developer Andi Smithers
Username Bolloxim
Uploaded November 21, 2022
Rating 3
Size 4,466 Kb
Views 16,192
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