Re: [OpenLayers-Users] Re: add an arrow to line feature

ok this kinda worked for me...for putting an arrow on a line, now this
is a line..not a polyline.

I made this function little function
--------------------------
function getAngleofLine(pointList) //calculate angle for screen
{

// point list is an array of OpenLayers.Geometry.Point having two
points of a line

var startPt=map.getPixelFromLonLat(new
OpenLayers.LonLat(pointList[0].x,pointList[0].y));
var endPt=map.getPixelFromLonLat(new
OpenLayers.LonLat(pointList[1].x,pointList[1].y));
//in the above line I think it would work too if we use Coordinates
instead of Pixels, but I used pixel cause its easy to do the math with

       			
var dy=endPt.y - startPt.y;
var dx=endPt.x - startPt.x;
       			
var angle=Math.atan(dy/dx) / (Math.PI/180); //convert to degrees
       			
if(dx<0) // adjustment in angle for line moving to bottom
angle-=180; // switch direction..if I dont do this.. the traigle will
point in other direction in certain cases
     			  			
return angle;	
}