Canvas Falloff Test

Developer
Aaron Levine
Size
2,989 Kb
Views
4,048
  1. Canvas Falloff Test Previews
  2. Canvas Falloff Test HTML Codes
  3. Canvas Falloff Test CSS Codes
  4. Canvas Falloff Test JS Codes

How do I make an canvas falloff test?

What is a canvas falloff test? How do you make a canvas falloff test? This script and codes were developed by Aaron Levine on 30 January 2023, Monday.

Canvas Falloff Test Previews
IQ Test

Canvas Falloff Test - Script Codes HTML Codes

<!DOCTYPE html>
<html >
<head> <meta charset="UTF-8"> <title>Canvas Falloff Test</title> <script src="https://s.codepen.io/assets/libs/modernizr.js" type="text/javascript"></script>
<meta name="viewport" content="width=device-width"> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/5.0.0/normalize.min.css"> <link rel="stylesheet" href="css/style.css">
</head>
<body> <script src='http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js'></script> <script src="js/index.js"></script>
</body>
</html>

Canvas Falloff Test - Script Codes CSS Codes

canvas { width: 100%; height: 100%; background: rgba(0, 0, 0, 0.2);
}
html, body { width: 100%; height: 100%; padding: 0; overflow: hidden;
}

Canvas Falloff Test - Script Codes JS Codes

var App = {};
App.canvas;
App.ctx;
App.width;
App.height;
App.prevTimestamp;
App.deltaTime;
App.mouseX;
App.mouseY;
App.dots = [];
window.requestAnimationFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame || window.webkitRequestAnimationFrame;
App.Clear = function(){ App.ctx.clearRect(0, 0, App.width, App.height);
}
App.Dot = function(x, y, color){ this.x = x; this.y = y; this.offsetX = 0; this.offsetY = 0; this.width = 10; this.height = 10; this.color = color;
};
App.Dot.prototype.Draw = function(){ var ctx = App.ctx; var x = this.x + this.offsetX; var y = this.y + this.offsetY; ctx.save(); ctx.fillStyle = this.color; ctx.fillRect(x - this.width/2, y - this.height/2, this.width, this.height); ctx.restore();
};
App.InitCanvas = function(){ var canvas = App.canvas = document.createElement('canvas'); document.body.appendChild(canvas); App.UpdateDimensions(); App.ctx = canvas.getContext('2d');
};
App.UpdateDimensions = function(){ var rect = App.canvas.getBoundingClientRect(); var width = App.width = App.canvas.width = rect.width; var height = App.height = App.canvas.height = rect.height;
};
App.InitDots = function(){ for(var x=0; x<App.width; x += 20){ for(var y=0; y<App.height; y+= 20){ App.dots.push(new App.Dot(x, y, 'rgb(0, 0, 0)')); } }
}
App.InitMouseEvents = function(){ App.mouseX = App.width / 2; App.mouseY = App.height / 2; App.canvas.addEventListener('mousemove', function(e){ App.mouseX = e.offsetX; App.mouseY = e.offsetY; }); App.canvas.addEventListener('touchmove', function(e){ App.mouseX = e.touches[0].pageX; App.mouseY = e.touches[0].pageY; }); document.addEventListener('touchmove', function(e){ e.returnValue = false; if(typeof e.preventDefault === 'function') e.preventDefault(); });
}
App.MoveDots = function(){ for(var i=0, j=App.dots.length; i<j; i++){ var dot = App.dots[i]; var difX = dot.x - App.mouseX; var difY = dot.y - App.mouseY; var distanceSquared = Math.pow(difX, 2) + Math.pow(difY, 2); var distance = Math.sqrt(distanceSquared); var dirX = difX / distance; var dirY = difY / distance; dot.offsetX = dirX * Math.log(distance * 10000000); dot.offsetY = dirY * Math.log(distance * 10000000); dot.offsetX = Math.min(50, Math.max(-50, dot.offsetX)); dot.offsetY = Math.min(50, Math.max(-50, dot.offsetY)); var size = Math.max(1, Math.min(18, Math.log(distance / 15)*4 ) ); dot.width = dot.height = size; var red = 255 - (size / 18) * 255; dot.color = 'rgb('+(red.toFixed())+', 0, 0)'; }
}
App.Draw = function(){ for(var i=0, j=App.dots.length; i<j; i++){ App.dots[i].Draw(); }
}
App.Loop = function(timestamp){ App.deltaTime = timestamp - App.prevTimestamp; App.prevTimestamp = timestamp; App.Clear(); App.MoveDots(); App.Draw(); requestAnimationFrame(App.Loop);
}
App.Main = function(){ App.InitCanvas(); App.InitDots(); App.InitMouseEvents(); App.Loop();
};
App.Main();
Canvas Falloff Test - Script Codes
Canvas Falloff Test - Script Codes
Home Page Home
Developer Aaron Levine
Username Aldlevine
Uploaded January 30, 2023
Rating 4
Size 2,989 Kb
Views 4,048
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