/**
* Gets the distances of each point from the circle
* @param array $center The center of the circle
* @param float $radius Radius of the circle
* @param array $lines The gcode lines
* @return array An array of the errors
*/
function getCircleErrors($center, $radius, $lines)
{
$errors = array();
foreach ($lines as $line) {
$vec = array($center['X'] - $line['X'], $center['Y'] - $line['Y']);
$length = vector_magnitude($vec);
$errors[] = abs($length - $radius);
}
return $errors;
}
/**
* Calculates the angle between two vectors
*
* e.g. angleBetween(['X'=> 0, 'Y' => 0] & ['X' => 1, 'Y' => 1]);
* @param array $v1 Vector 1
* @param array $v2 Vector 2
* @return float The angle in radians
*/
function angleBetween($v1, $v2)
{
$angle = acos(vector_dot_product($v1, $v2) / (vector_magnitude($v1) * vector_magnitude($v2))) + 3 * (M_PI / 4);
return $angle > M_PI ? $angle - M_PI : $angle;
}
