Lines Matching defs:a

50 /// @param a vector
52 function l_vec($a, $b) {
53 	$ax = $a[1][0]-$a[0][0];
54 	$ay = $a[1][1]-$a[0][1];
71 /// @param a vector
73 function l_vec9($a, $b) {
74 	$ax = $a[1][0]-$a[0][0];
75 	$ay = $a[1][1]-$a[0][1];
112 	$a = array($arr[1], $arr[0]);
113 	$c = l_vec($a, 6);
176 function veclen($a){
177 	return sqrt($a[0] * $a[0] + $a[1] * $a[1]);
181 function vecsub($a, $b){
182 	return array($a[0] - $b[0], $a[1] - $b[1]);
186 function vecdist($a, $b){
187 	return veclen(vecsub($a, $b));
190 /// Returns dividing point of line between $a and $b that divide
192 function midPoint($a, $b, $t){
193 	return array($a[0] * (1. - $t) + $b[0] * $t,
194 		$a[1] * (1. - $t) + $b[1] * $t);
197 /// Obtain coordinates of a point on a quadratic bezier curve.
198 function quadraticBezierPoint($a, $b, $c, $t){
199 	$ab = midPoint($a, $b, $t);
204 /// Obtain coordinates of a point on a cubic bezier curve.
205 function cubicBezierPoint($a, $c, $d, $b, $t){
206 	$ac = midPoint($a, $c, $t);
215 /// Draws a cubic Bezier curve on image $im.
217 	$a = array($prev["x"], $prev["y"]);
219 	$c = isset($p["cx"]) && isset($p["cy"]) ? array($p["cx"], $p["cy"]) : $a;
222 	// If both c and d control points are not defined, just draw a straight line,
224 		imageline($im, $a[0], $a[1], $b[0], $b[1], $color);
231 	$length = vecdist($a, $c)
236 	$a0 = $a;
239 		$p1 = cubicBezierPoint($a, $c, $d, $b, $t / $divs);
345 							$a = array();
347 								$a[] = array($first2["cx"], $first2["cy"]);
349 								$a[] = array($first2["dx"], $first2["dy"]);
351 								$a[] = array($first2["x"], $first2["y"]);
352 							$a[] = array($first["x"], $first["y"]);
353 							l_hige($im, $a, $c);
358 							$a = array();
360 								$a[0] = array($last["dx"], $last["dy"]);
362 								$a[0] = array($last["cx"], $last["cy"]);
364 								$a[0] = array($last2["x"], $last2["y"]);
365 							$a[1] = array($last["x"], $last["y"]);
366 							l_hige($im, $a, $c);