// (c) 2007 KystAtlas AS (Hans Martin Mohn)

gtAssert("gtPoint != null");function gtMatrix(matrix_string)
{if(matrix_string)
this.setFromString(matrix_string);else
{this.m_sx=1.0;this.m_sy=1.0;this.m_rx=0.0;this.m_ry=0.0;this.m_tx=0.0;this.m_ty=0.0;}}
gtMatrix.prototype.set=function set(sx,sy,rx,ry,tx,ty)
{this.m_sx=sx;this.m_rx=rx;this.m_tx=tx;this.m_sy=sy;this.m_ry=ry;this.m_ty=ty;};gtMatrix.prototype.identity=function identity()
{this.m_sx=this.m_sy=1.0;this.m_rx=this.m_ry=0.0;this.m_tx=this.m_ty=0.0;};gtMatrix.prototype.det=function det()
{return this.m_sx*this.m_sy-this.m_ry*this.m_rx;};gtMatrix.prototype.invert=function invert()
{var d=this.det();set(this.m_sy/d,this.m_sx/d,-this.m_rx/d,-this.m_ry/d,(this.m_rx*this.m_ty-this.m_tx*this.m_sy)/d,(this.m_tx*this.m_ry-this.m_sx*this.m_ty)/d);};gtMatrix.prototype.inverse=function inverse()
{var d=this.det();var i=new gtMatrix();i.set(this.m_sy/d,this.m_sx/d,-this.m_rx/d,-this.m_ry/d,(this.m_rx*this.m_ty-this.m_tx*this.m_sy)/d,(this.m_tx*this.m_ry-this.m_sx*this.m_ty)/d);return i;};gtMatrix.prototype.copy=function copy(m)
{this.m_sx=m.m_sx;this.m_sy=m.m_sy;this.m_rx=m.m_rx;this.m_ry=m.m_ry;this.m_tx=m.m_tx;this.m_ty=m.m_ty;};gtMatrix.prototype.clone=function clone()
{var c=new gtMatrix();c.copy(this);return c;};gtMatrix.prototype.multiply=function multiply(m)
{var sx1=m.m_sx*this.m_sx+m.m_rx*this.m_ry;var rx1=m.m_sx*this.m_rx+m.m_rx*this.m_sy;var tx1=m.m_sx*this.m_tx+m.m_rx*this.m_ty+m.m_tx;var ry1=m.m_ry*this.m_sx+m.m_sy*this.m_ry;var sy1=m.m_ry*this.m_rx+m.m_sy*this.m_sy;this.m_ty=m.m_ry*this.m_tx+m.m_sy*this.m_ty+m.m_ty;this.m_sx=sx1;this.m_rx=rx1;this.m_sy=sy1;this.m_ry=ry1;this.m_tx=tx1;};gtMatrix.prototype.scale=function scale(x,y)
{var tmp=new gtMatrix();tmp.m_sx=x;tmp.m_sy=y;this.multiply(tmp);};gtMatrix.prototype.rotate=function rotate(angle)
{var tmp=new gtMatrix();var cv=Math.cos(angle/180.0*Math.PI);var sv=Math.sin(angle/180.0*Math.PI);tmp.m_sx=cv;tmp.m_rx=-sv;tmp.m_ry=sv;tmp.m_sy=cv;this.multiply(tmp);};gtMatrix.prototype.translate=function translate(x,y)
{var tmp=new gtMatrix();tmp.m_tx=x;tmp.m_ty=y;this.multiply(tmp);};gtMatrix.prototype.transformPoint=function transformPoint(p)
{var x=this.m_sx*p.x+this.m_rx*p.y+this.m_tx;p.y=this.m_sy*p.y+this.m_ry*p.x+this.m_ty;p.x=x;};gtMatrix.prototype.transformPointsString=function transformPointsString(points)
{var new_coords="";var sep=new RegExp("[, ]","g");var p=points.split(sep);for(var i=0;i<p.length;i+=2)
{var x=parseFloat(p[i]);var y=parseFloat(p[i+1]);new_coords+=(this.m_sx*x+this.m_rx*y+this.m_tx)+","+(this.m_sy*y+this.m_ry*x+this.m_ty)+" ";}
if(new_coords.length>0)
return new_coords.substring(0,new_coords.length-1);else
return new_coords;};gtMatrix.prototype.transformPathString=function transformPathString(path)
{var new_coords="";var re=/[0-9\.-]*/g;var x=0.0;var y=0.0;var arr;while((arr=re.exec(path))!=null)
{if(arr[0].length===0)
{var sep=path.substring(arr.index,arr.lastIndex);if(sep!=",")
new_coords+=sep;}
else
{if(x==0.0)
x=parseFloat(arr[0]);else
{y=parseFloat(arr[0]);new_coords+=(this.m_sx*x+this.m_rx*y+this.m_tx).toPrecision(12)+","+(this.m_sy*y+this.m_ry*x+this.m_ty).toPrecision(12);x=0.0;}}}
return new_coords;};gtMatrix.prototype.toString=function toString()
{return"m_sx="+this.m_sx+", m_sy="+this.m_sy+", m_rx="+this.m_rx+", m_ry="+this.m_ry+", m_tx="+this.m_tx+", m_ty="+this.m_ty;};gtMatrix.prototype.setFromString=function setFromString(s)
{var values=s.split(",");if(values.length==6)
{this.set(parseFloat(values[0]),parseFloat(values[1]),parseFloat(values[2]),parseFloat(values[3]),parseFloat(values[4]),parseFloat(values[5]));}};