JS1k: The JavaScript code golfing competition

var l=10,s=50,a=120,x=0,y=0,S=new Array(),c,M=Math,L;function d(){C=c.getContext('2d');C.clearRect(0,0,c.width,c.height);for(p in S){t=S[p];if(t.o!=null&&t.o.length>0){for(cp in t.o){m=t.o[cp];D=M.sqrt(M.pow(t.u-m.u,2)+M.pow(t.r-m.r,2));K=255/(a-s)*(D-s);C.shadowOffsetX=-5*(10/L*x);C.shadowOffsetY=-5*(10/L*y);C.shadowBlur=5;C.shadowColor='rgba(0,0,255,0.5)';C.strokeStyle='rgb('+M.floor(K)+',0,'+Math.floor(255-K)+')';C.beginPath();C.moveTo(t.u,t.r);C.lineTo(m.u,m.r);C.closePath();C.stroke()}}}}function O(x,y,o){t=this;t.x=x;t.y=y;t.u=t.x*s;t.r=t.y*s;t.o=o}c=document.getElementById('c');L=c.width=c.height=500;p=0;for(i=0;i<=l;i++){for(j=0;j<=l;j++){S[p]=new O(i,j);k=new Array();for(z in S){if(i>0&&S[z].x==i-1&&S[z].y==j)k[k.length]=S[z];if(j>0&&S[z].x==i&&S[z].y==j-1)k[k.length]=S[z]}S[p].o=k;p++}}d();c.onmousemove=function(e){x=e.offsetX?e.offsetX:e.layerX;y=e.offsetY?e.offsetY:e.layerY;for(p in S){t=S[p];t.u=t.x*s;t.r=t.y*s;q=x-t.u;Q=y-t.r;D=M.sqrt((q*q)+(Q*Q));if(D<a){v=a/D;t.u-=(q*v)-q;t.r-=(Q*v)-Q}}d()}

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var cells = 10;
			var cellsize = 50;
			var affection_distance = 130;
			
			var mousex = -1;
			var mousey = -1;
		
			var points = new Array();
		
			var canvas;
			var M = Math;
			var size;
		
			function init(){
					

				canvas  = document.getElementById('c');		
				size = canvas.width = canvas.height= 500;
				
				
				InitGridArray();
				DrawGrid();
				
				canvas.onmousemove = function(event){
								
						mousex = event.offsetX ? event.offsetX : event.layerX;
						mousey = event.offsetY ? event.offsetY : event.layerY;
						adjustPoints();
						
						DrawGrid();
				};
				
				
			}
			
			function InitGridArray(){
				var pos = 0;
				for(var i = 0; i <= cells; i++)
				{
					for(var j = 0; j <= cells; j++)
					{
						points[pos] = new Point(i,j);
						
						var connectedList = new Array();
						
							for(var z in points)
							{
								if(i>0 && points[z].x == i-1 && points[z].y == j)
								{
									connectedList[connectedList.length] = points[z];
								}
								if(j>0 && points[z].x == i && points[z].y == j-1)
								{
									connectedList[connectedList.length] = points[z];
								}
							}
						
						points[pos].PointArray = connectedList;
						
						pos++;
					}
				}
			}
			
			function DrawGrid(){
				
				var context = canvas.getContext('2d');  
				
				context.clearRect(0,0,canvas.width,canvas.height);
				
				
				
				for(var p in points)
				{
				
					var point = points[p];
					
					if(point.PointArray != null && point.PointArray.length>0)
					{
					
						//foreach connected point
						for(var cp in point.PointArray)
						{
							var connectedPoint = point.PointArray[cp];
							
							var distance = M.sqrt(M.pow(point.offsetX - connectedPoint.offsetX,2) + M.pow(point.offsetY - connectedPoint.offsetY,2));
							var procent_rood = 255 / (affection_distance-cellsize) * (distance-cellsize)
							
							
							context.shadowOffsetX =  -5*(10/size*mousex);
							context.shadowOffsetY =  -5*(10/size*mousey);
							context.shadowBlur= 5;
   
							context.shadowColor   = 'rgba(0, 0, 255, 0.5)';

							context.strokeStyle = 'rgb('+M.floor(procent_rood)+',0,' + Math.floor(255-procent_rood) + ')';  
							
							
							drawLine(
								context,
								point.offsetX,
								point.offsetY,
								connectedPoint.offsetX,
								connectedPoint.offsetY
								
							);
							
						}
					}
				}
			}
			
			function adjustPoints(){
				
				for(var p in points)
				{
					var point = points[p];
				
					//zet de orriginele waarden terug
					point.offsetX = point.x * cellsize;
					point.offsetY = point.y * cellsize;
					
					//deze vars kunnen ook negatief zijn
					var x_dist = mousex - point.offsetX;
					var y_dist = mousey - point.offsetY;
					
					//deze var is altijd positief
					var distance = M.sqrt(M.pow(x_dist,2) + M.pow(y_dist,2));
					
						
					if(distance < affection_distance)
					{
						var verhouding = affection_distance / distance;
						
						point.offsetX -= (x_dist * verhouding) - x_dist;
						point.offsetY -= (y_dist * verhouding) - y_dist;
						
					
					}
				}
				
			}
			
			function drawLine(ctx, startx, starty, endx, endy) {
			  ctx.beginPath();
			  ctx.moveTo(startx, starty);
			  ctx.lineTo(endx, endy);
			  ctx.closePath();
			  ctx.stroke();
			}
		
			function Point(x,y, PointArray){
				this.x = x;
				this.y = y;
				this.offsetX = this.x * cellsize;
				this.offsetY = this.y * cellsize;
				this.PointArray = PointArray;
			}
			init();