Ball Physics
How do I make an ball physics?
Bouncing, colliding rubber balls.. What is a ball physics? How do you make a ball physics? This script and codes were developed by Seth Broweleit on 14 October 2022, Friday.
Ball Physics - Script Codes HTML Codes
<!DOCTYPE html>
<html >
<head> <meta charset="UTF-8"> <title>Ball Physics</title> <link rel="stylesheet" href="css/style.css">
</head>
<body> <canvas id="c"></canvas> <script src="js/index.js"></script>
</body>
</html>
Ball Physics - Script Codes CSS Codes
* { padding:0; margin:0;
}
canvas { width:100%; height:100%;
}
Ball Physics - Script Codes JS Codes
/*
By Adam at codepen (https://codepen.io/stuffit) 2012
Rubber bouncing balls.
Still a work in progress.
Reduce BALL_NUMBER if it runs slowly.
*/
var balls = function() { /* configuration */ var BALL_NUMBER = 40; var BALL_SIZE = 60; var BALL_COLOR = "#70CDFF"; var BACK_COLOR = "#f9f9f9"; var GRAVITY_X = 0; var GRAVITY_Y = 0.5; var MOUSE_REPEL = false; var MOUSE_STRENGTH = 1.4; var BOUNCINESS = 0.8; var FRICTION = 1.01; var WALL_STICK = false; var WALL_BOUNCE = true; var STICKINESS = 50; window.requestAnimFrame = (function(){ return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function( callback ){ window.setTimeout(callback, 1000 / 60); }; })(); var pixels, mouseX, mouseY, mouseDown = false, balls = [], canvas, context, width, height; var loop = function() { pixels = new Array(width * height); context.fillStyle = BACK_COLOR; context.fillRect(0,0,width,height); for (var i = 0; i < BALL_NUMBER; i++) { balls[i].tick(); } requestAnimFrame(loop); }; var Ball = function(radius) { this.x = Math.random() * width; this.y = Math.random() * height; this.fx = 0; this.fy = 0; this.dx = 0; this.dy = 0; }; Ball.prototype.tick = function() { if (mouseDown) { var dx = this.x - mouseX; var dy = this.y - mouseY; var d = Math.sqrt(dx * dx + dy * dy)/(MOUSE_STRENGTH); if (d < BALL_SIZE * 4) { if(MOUSE_REPEL) { this.dx += dx / d; this.dy += dy / d; } else { this.dx -= dx / d; this.dy -= dy / d; } } } this.fy += GRAVITY_Y; this.fx += GRAVITY_X; this.x += this.fx; this.y += this.fy; if (this.x < BALL_SIZE * .5) { if(WALL_STICK) { this.x = BALL_SIZE * .5; this.fy /= FRICTION*STICKINESS; } else if(WALL_BOUNCE) { this.x = BALL_SIZE * .5; this.fx = this.fx * (-1) * BOUNCINESS; this.fy /= FRICTION; } else { this.dx += (BALL_SIZE * .5 - this.x); } } else if (this.x > width - BALL_SIZE * .5) { if(WALL_STICK) { this.x = width - BALL_SIZE * .5; this.fy /= FRICTION*STICKINESS; } else if(WALL_BOUNCE) { this.x = width - BALL_SIZE * .5; this.fx = this.fx * (-1) * BOUNCINESS; this.fy /= FRICTION; } else { this.dx -= (this.x - width + BALL_SIZE * .5); } } if (this.y < BALL_SIZE * .5) { if(WALL_STICK) { this.y = BALL_SIZE * .5; this.fx /= FRICTION*STICKINESS; } else if(WALL_BOUNCE) { this.y = BALL_SIZE * .5; this.fy = this.fy * (-1) * BOUNCINESS; this.fx /= FRICTION; } else { this.dy += (BALL_SIZE * .5 - this.y); } } else if (this.y > height - BALL_SIZE * .5) { if(WALL_STICK) { this.y = height - BALL_SIZE * .5; this.fx /= FRICTION*STICKINESS; } else if(WALL_BOUNCE) { this.y = height - BALL_SIZE * .5; this.fy = this.fy * (-1) * BOUNCINESS; this.fx /= FRICTION; } else { this.dy -= (this.y - height + BALL_SIZE * .5); } } var inwidth = Math.round(this.x / BALL_SIZE); var inheight = Math.round(this.y / BALL_SIZE); for (var a = inwidth - 1; a <= inwidth + 1; a++) { for (var b = inheight - 1; b <= inheight + 1; b++) { var g = pixels[b * width + a] || []; for (j = 0, l = g.length; j < l; j++) { var that = g[j]; var dx = that.x - this.x; var dy = that.y - this.y; var d = Math.sqrt(dx * dx + dy * dy); if (d < BALL_SIZE && d > 0) { dx = (dx / d) * (BALL_SIZE - d) * .25; dy = (dy / d) * (BALL_SIZE - d) * .25; this.dx -= dx; this.dy -= dy; that.dx += dx; that.dy += dy; } } } } if (!pixels[inheight * width + inwidth]) { pixels[inheight * width + inwidth] = [this]; } else { pixels[inheight * width + inwidth].push(this); } this.x += this.dx; this.y += this.dy; this.fx += this.dx; this.fy += this.dy; this.dx = 0; this.dy = 0; context.beginPath(); context.fillStyle = BALL_COLOR; context.arc(this.x, this.y, BALL_SIZE / 2, 0, Math.PI * 2, true); context.closePath(); context.fill(); }; return { init: function(canvas, w, h) { canvas = document.getElementById(canvas); context = canvas.getContext('2d'); canvas.height = (h) ? h : window.innerHeight; canvas.width = (w) ? w : window.innerWidth; width = canvas.width; height = canvas.height; canvas.addEventListener('mousedown', function(e) { if (e.preventDefault) e.preventDefault(); mouseDown = true; return false; }, false); canvas.addEventListener('mouseup', function(e) { mouseDown = false; return false; }, false); canvas.addEventListener('mousemove', function(e) { if(e.offsetX) { mouseX = e.offsetX; mouseY = e.offsetY; } else if(e.layerX) { mouseX = e.layerX; mouseY = e.layerY; } return false; }, false); window.onresize = function() { init(c,w,h); return false; } setTimeout(function() { for (var i = 0; i < BALL_NUMBER; i++) { balls[i] = new Ball(20); } loop(); }, 100); } };
}();
balls.init('c');
Developer | Seth Broweleit |
Username | getsetbro |
Uploaded | October 14, 2022 |
Rating | 3 |
Size | 3,149 Kb |
Views | 12,144 |
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