function parse_stl_string($str)
{
$lines = split("\n", $str);
$vertexes = array();
$normals = array();
$faces = array();
$face_vertexes = array();
$normal_count = -1;
foreach ($lines as $line) {
// TODO: maybe faster if you strip spaces on whole contents instead of every line
$line = preg_replace('/\\s+/', ' ', $line);
$line = preg_replace('/\\s+$/', '', $line);
// echo $line . "<br/>\n";
// TODO: probably don't need to parse normals anyway
preg_match('/facet normal (.*) (.*) (.*)$/', $line, $matches);
if (count($matches) > 1) {
$normals[] = array((double) $matches[1], (double) $matches[2], (double) $matches[3]);
$normal_count++;
} else {
preg_match('/vertex (.*) (.*) (.*)$/', $line, $matches);
if (count($matches) > 1) {
$vertex = array((double) $matches[1], (double) $matches[2], (double) $matches[3]);
if (!in_array($vertex, $vertexes)) {
$vertexes[] = $vertex;
}
$face_vertexes[$normal_count][] = $vertex;
}
}
}
$faces = make_faces($vertexes, $face_vertexes);
return array($vertexes, $faces);
}
function parse_stl_binary($fp)
{
$vertexes = array();
$faces = array();
$face_vertexes = array();
// $fp = fopen($filename, "rb");
rewind($fp);
// skip header
$data = fread($fp, 80);
$header = unpack("c*", $data);
// get number of faces
$data = fread($fp, 4);
$count = unpack("i", $data);
for ($i = 0; $i < $count[1]; $i++) {
// skip normals
$data = fread($fp, 12);
$normal = unpack("fff", $data);
for ($v_count = 0; $v_count < 3; $v_count++) {
$points = array();
for ($v_index = 0; $v_index < 3; $v_index++) {
$data = fread($fp, 4);
$points[] = unpack("f", $data);
}
$vertex = array($points[0][1], $points[1][1], $points[2][1]);
if (!in_array($vertex, $vertexes)) {
$vertexes[] = $vertex;
}
$face_vertexes[$i][] = $vertex;
}
$data = fread($fp, 2);
$attribute = unpack("S", $data);
}
$faces = make_faces($vertexes, $face_vertexes);
return array($vertexes, $faces);
}
