require 'LibSpringy/LibSpringy.php';

$graph = new Graph();

// Create some nodes and edges between them
$node1 = $graph->newNode(array('label' => 'node1'));
$node2 = $graph->newNode(array('label' => 'node2'));
$node3 = $graph->newNode(array('label' => 'node3'));
$node4 = $graph->newNode(array('label' => 'node4'));

$graph->newEdge($node1, $node2, array());
$graph->newEdge($node1, $node3, array());
$graph->newEdge($node2, $node3, array());
$graph->newEdge($node2, $node4, array());

$force = new ForceDirected($graph);

// Run it
$force->start();

// And get stats
$crossingLines = $force->getCrossingLines();

echo 'steps : '.$force->step.'<br />';
echo 'energy : '.$force->totalEnergy().'<br />';
echo 'crossingLines : '.count($crossingLines).'<br />';

// Auto resizing and positionning of elements in a 500*500 area with a margin of 100
$force->autosize(500, 500, 100);

$imagick = new \Imagick();
$imagick->newImage(500, 500, 'rgb(255, 255, 255)');
$imagick->setImageFormat("png");

$drawEdges = new \ImagickDraw();
$drawEdges->setStrokeColor('rgb(0, 0, 0)');
$drawEdges->setFillColor('none');	
$drawEdges->setStrokeWidth(3);

// Draw edges
foreach($graph->edges as $edge) {
	$source = $force->point($edge->source);
	$target = $force->point($edge->target);

	$drawEdges->line($source->p->x, $source->p->y, $target->p->x, $target->p->y);
}

$imagick->drawImage($drawEdges);

$drawPoints = new \ImagickDraw();
$drawPoints->setStrokeOpacity(1);
$drawPoints->setStrokeColor('rgb(0, 0, 0)');
$drawPoints->setFillColor('rgb(0, 0, 0)');
$drawPoints->setStrokeWidth(1);

// And draw nodes
foreach($graph->nodes as $node) {
	$point = $force->point($node);
	
	$drawPoints->circle($point->p->x, $point->p->y, $point->p->x, $point->p->y+20);
}

$imagick->drawImage($drawPoints);

// Add some debug
$drawDebug = new \ImagickDraw();
$drawDebug->annotation(5, 15, $force->step . ' steps - ' . $duree);

$imagick->drawImage($drawDebug);

// And show
header('Content-Type: image/png');
echo $imagick;