Prism

Developer
Elliot Geno
Size
2,843 Kb
Views
42,483

How do I make an prism?

I generate a random field of triangles into an empty SVG. Using Greensock's TweenMax I animate each point within the field. Using TweenMax's "ticker" object, I add an event listener to update the field when something changes.. What is a prism? How do you make a prism? This script and codes were developed by Elliot Geno on 11 September 2022, Sunday.

Prism Previews
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Prism - Script Codes HTML Codes

<!DOCTYPE html>
<html >
<head> <meta charset="UTF-8"> <title>Prism</title> <link rel="stylesheet" href="css/style.css">
</head>
<body> <body> <svg id="mesh" width="400" height="400"> </svg>
</body> <script src='https://cdnjs.cloudflare.com/ajax/libs/gsap/1.11.4/TweenMax.min.js'></script> <script src="js/index.js"></script>
</body>
</html>

Prism - Script Codes CSS Codes

body{ background-color:#666666; margin: 0px;
}

Prism - Script Codes JS Codes

var columns=10;
var rows=10;
var numCells=rows*columns;
var numTriangles=numCells*2;
var numPoints=(rows+1)*(columns+1);
var mesh;
var meshWidth;
var meshHeight;
var points=[];
var triangles=[];
var amountThreshold=.5;
var amountX;
var amountY;
var halfAmountX;
var halfAmountY;
var minDelay=.1;
var maxDelay=7;
var delayRange=maxDelay-minDelay;
var minDuration=1.1;
var maxDuration=2;
var durationRange=maxDuration-minDuration;
window.onload = function () { mesh=document.getElementById("mesh"); meshWidth=mesh.getAttribute("width"); meshHeight=mesh.getAttribute("height"); amountX=(meshWidth/columns)*amountThreshold; amountY=(meshHeight/rows)*amountThreshold; halfAmountX=amountX*.5; halfAmountY=amountY*.5; createPoints(); createTriangles(); draw(); TweenMax.ticker.addEventListener("tick", draw, this, true, 1);
};
function createPoints(){ for(var i=0;i<numPoints;i++){ var c=i%(columns+1); var r=parseInt((i/numPoints)*(rows+1)); var x=meshWidth*(c/(columns)); var y=meshWidth*(r/(rows)); var fixedX=x==0||x==meshWidth?true:false; var fixedY=y==0||y==meshHeight?true:false; var targetX=fixedX?x:((Math.random()*amountX)-halfAmountX)+x; var targetY=fixedY?y:((Math.random()*amountY)-halfAmountY)+y; var point= {x:targetX,y:targetY,originX:x,originY:y,fixedX:fixedX,fixedY:fixedY}; points.push(point); if(!point.fixedX||!point.fixedY){ tweenPoint(point); } }
}
function createTriangles(){ var columnOffset=columns+1; for(var i=0;i<numCells;i++){ var c=i%columns; var r=parseInt((i/numCells)*rows); var tlIndex=c+(r*columnOffset); var trIndex=c+(r*columnOffset)+1; var blIndex=tlIndex+columnOffset; var brIndex=trIndex+columnOffset; var tl=points[tlIndex]; var tr=points[trIndex]; var bl=points[blIndex]; var br=points[brIndex]; var points1=[tl.x,tl.y,tr.x,tr.y,bl.x,bl.y]; var points2=[tr.x,tr.y,br.x,br.y,bl.x,bl.y]; var triangle1=addElement("polygon",mesh,{points:points1.toString(),fill:randomColor()}); var triangle2=addElement("polygon",mesh,{points:points2.toString(),fill:randomColor()}); triangles.push({triangle:triangle1,points:[tl,tr,bl]}); triangles.push({triangle:triangle2,points:[tr,br,bl]}); }
}
function tweenPoint(point){ var targetX=point.fixedX?point.originX:((Math.random()*amountX)-halfAmountX)+point.originX; var targetY=point.fixedY?point.originY:((Math.random()*amountY)-halfAmountY)+point.originY; TweenMax.to(point,minDuration+(Math.random()*durationRange),{delay:minDelay+(Math.random()*delayRange),x:targetX,y:targetY,ease:Elastic.easeOut,onComplete:tweenPoint,onCompleteParams:[point]})
}
function draw(){ for(var i=0;i<numTriangles;i++){ var triangle=triangles[i].triangle; var points=triangles[i].points; var p1=points[0]; var p2=points[1]; var p3=points[2]; var pointList=[p1.x,p1.y,p2.x,p2.y,p3.x,p3.y]; triangle.setAttribute("points",pointList); }
}
function addElement(type,parent,attributes){ var element=document.createElementNS("http://www.w3.org/2000/svg",type); for (var property in attributes) { element.setAttribute(property,attributes[property]); } parent.appendChild(element); return element;
}
function randomColor(){ return "#"+Math.floor(Math.random()*16777215).toString(16);
}
Prism - Script Codes
Prism - Script Codes
Home Page Home
Developer Elliot Geno
Username pyrografix
Uploaded September 11, 2022
Rating 3.5
Size 2,843 Kb
Views 42,483
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