This function allows you to draw splines composed of many bezier curves on your pictures. It is possible to tune the rendering by playing with the $Format array. To learn more about this please read the Format array guide.

A spline is a curve composed of mandatory way points. All other positions of the curve are computed using the bezier algorithm. As you may have noticed, you can‘t specify the control points used to compute the bezier segments, those points are computed internally using a trigonometric algorithm. The force applied to the control points can be adjusted with the Force parameter of the configuration array.

drawSpline($Coordinates,$Format="")

Where :


The coordinates must be specified in an array or points, a point is a two dimension array :

 /* This is a point, X=10 and Y=30 */
 $Point = array(10,30);

 /* This is a list of points (10,30) , (20,50) , (30,70) */
 $Coordinates = array(array(10,30),array(20,50),array(30,70));

It is possible to customize the pixel rendering by playing with this array. Providing a detailled configuration is not mandatory, by default the spline will be drawn black with no transparency.

 /* Enable shadow support on a (+1,+1) basis */
 $myPicture->setShadow(TRUE,array("X"=>1,"Y"=>1,"R"=>0,"G"=>0,"B"=>0,"Alpha"=>20)); 

 /* 1st spline drawn in white with control points visible */
 $SplineSettings = array("R"=>255,"G"=>255,"B"=>255,"ShowControl"=>TRUE);
 $Coordinates = array(array(40,80),array(280,60),array(340,166),array(590,120));
 $myPicture->drawSpline($Coordinates,$SplineSettings);

 /* 2nd spline dashed drawn in white with control points visible  */
 $SplineSettings = array("R"=>255,"G"=>255,"B"=>255,"ShowControl"=>TRUE,"Ticks"=>4);
 $Coordinates = array(array(250,50),array(250,180),array(350,180),array(350,50));
 $myPicture->drawSpline($Coordinates,$SplineSettings);

This will draw two splines with visible control points. As the shadow support is enabled on line 2, the arrow will be surrounded by a small (+1,+1) shadow.