note 102762 modified in function.imagearc by danbrown

Hi, this is a function that replaces "imagearc" to solve the thickness-problem. it does not use the global value set by imagesetthickness, so you have to pass it along. 

"connecting" the arc to lines is still a problem, it sometimes shifts by 1px, but so does the original function.

Theres still alot to improve ...

<?php
function myimagearc($im,$mid_x,$mid_y,$rad,$w1,$w2,$col,$thickness){
		global $cols;
		$rad+=$thickness/2;	// to calculate outer edge
		$th_fact = 1-((($thickness-1)/$rad));		
		
		$pts = 36*$rad;	// adjust density
		$fact = $pts/360;
		$w1 = $w1*$fact;
		$w2 = $w2*$fact;
		if($thickness > 2)	// to make sure we have neither gaps nor ugly looking artefacts
			imagesetthickness($handle,2);
		else
			imagesetthickness($handle,1);	
		$winkel = (2*pi())/$pts;
		for($i=$w1+1;$i< $w2;$i++){
			$x = (cos($i*$winkel)*($rad));
			$y = (sin($i*$winkel)*($rad));
			$x1 = $x+$mid_x;
			$y1 = $y+$mid_y;
			$x2 = $th_fact*$x+$mid_x;
			$y2 = $th_fact*$y+$mid_y;
			imageline($im, $x1,$y1,$x2,$y2,$col);
		}
		imagesetthickness($handle,1); // just to reset
	}
?>

--was--
Hi, this is a function that replaces "imagearc" to solve the thickness-problem. it does not use the global value set by imagesetthickness, so you have to pass it along. 

"connecting" the arc to lines is still a problem, it sometimes shifts by 1px, but so does the original function.

Theres still alot to improve ...

function myimagearc($im,$mid_x,$mid_y,$rad,$w1,$w2,$col,$thickness){
		global $cols;
		$rad+=$thickness/2;	// to calculate outer edge
		$th_fact = 1-((($thickness-1)/$rad));		
		
		$pts = 36*$rad;	// adjust density
		$fact = $pts/360;
		$w1 = $w1*$fact;
		$w2 = $w2*$fact;
		if($thickness > 2)	// to make sure we have neither gaps nor ugly looking artefacts
			imagesetthickness($handle,2);
		else
			imagesetthickness($handle,1);	
		$winkel = (2*pi())/$pts;
		for($i=$w1+1;$i< $w2;$i++){
			$x = (cos($i*$winkel)*($rad));
			$y = (sin($i*$winkel)*($rad));
			$x1 = $x+$mid_x;
			$y1 = $y+$mid_y;
			$x2 = $th_fact*$x+$mid_x;
			$y2 = $th_fact*$y+$mid_y;
			imageline($im, $x1,$y1,$x2,$y2,$col);
		}
		imagesetthickness($handle,1); // just to reset
	}

http://php.net/manual/en/function.imagearc.php