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STLObject.Class.php
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STLObject.Class.php
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<?php
include 'Vertex.Class.php';
include 'Facet.Class.php';
class STLObject{
private $stl_file = '';// string of the file name/path
private $stl_data; // array newline delimited
private $reporting; // bool echo data as it's processed
private $name;
private $facets = array(); // facet objects
private $comments = array(); // any comments in the file are stored here as string
function __construct($reporting = false, $stl_file = ''){
$this->reporting = $reporting;
// is string and > '.stl'
if(is_string($stl_file) && (strlen($stl_file) > 4)){
$this->LoadSTLFile($stl_file);
}
}
public function LoadSTLFile($stl_file = ''){
// is string and > '.stl'
if(is_string($stl_file) && (strlen($stl_file) > 4)){
$this->stl_file = $stl_file;
$this->stl_data = file_get_contents($this->stl_file);
$this->stl_data = explode(PHP_EOL, $this->stl_data);
$facets = array();
$current_facet_normal = array();
$current_vertex_loop = array();
$current_vertex = 0;
foreach($this->stl_data as $key=>$line){
$search = strtolower($line);
if(preg_match('~\\b' . 'solid' . '\\b (.*)~i', $search, $objectname)){
if($this->reporting === true){
echo 'New Solid ' . $key . PHP_EOL;
}
if(!empty($objectname)){
$this->name = $objectname[1];
}
}
elseif(preg_match('~\\b' . 'endsolid' . '\\b~i', $search, $solid)){
if($this->reporting === true){
echo 'End of Solid ' . $key . PHP_EOL;
}
}
elseif(preg_match('~\\b' . 'facet normal' . '\\b (.*) (.*) (.*)~i', $search, $normal)){
if($this->reporting === true){
echo 'New Facet ' . $key . PHP_EOL;
}
$current_facet_normal = array($normal[1], $normal[2], $normal[3]);
}
elseif(preg_match('~\\b' . 'endfacet' . '\\b~i', $search, $facet)){
if($this->reporting === true){
echo 'End of Facet ' . $key . PHP_EOL;
}
$facets[] = $new_Facet = new Facet($current_facet_normal[0],
$current_facet_normal[1],
$current_facet_normal[2],
$current_vertex_loop);
$current_facet_normal = array();
$current_vertex_loop = array();
$current_vertex = 0;
}
elseif(preg_match('~\\b' . 'outer loop' . '\\b~i', $search, $loop)){
if($this->reporting === true){
echo 'New Outer Loop ' . $key . PHP_EOL;
}
}
elseif(preg_match('~\\b' . 'endloop' . '\\b~i', $search, $loop)){
if($this->reporting === true){
echo 'End of Loop ' . $key . PHP_EOL;
}
}
elseif(preg_match('~\\b' . 'vertex' . '\\b (.*) (.*) (.*)~i', $search, $vertex)){
if($this->reporting === true){
echo 'New Vertex ' . $key . PHP_EOL;
}
$current_vertex++;
$current_vertex_loop[] = array($vertex[1], $vertex[2], $vertex[3]); // Vertex x, y, z axis
}
elseif(preg_match('~\\b' . ';(.*)' . '\\b~i', $search, $comment)){
if($this->reporting === true){
echo 'New Comment ' . $key . PHP_EOL;
}
$comments[$key] = ";$comment";
}
else{
// Process or Ignore Unknown Data
if($this->reporting === true){
echo 'Unknown Data ' . $key . PHP_EOL;
}
}
if(empty($comments[$key]) == true){
$comments[$key] = "";
}
}
if(count($facets) > 0){
$this->facets = $facets;
}
}
else{
trigger_error("LoadSTLFile(STL File Path) requires you provide a string path to an stl file.". PHP_EOL, E_USER_ERROR);
}
}
public function ExportSTLFile($stl_file = ''){
// is string and > '.stl'
if(is_string($stl_file) && (strlen($stl_file) > 4)){
$line = 0;
$output = 'solid ' . $this->name . @$this->comments[$line] . PHP_EOL;
$line++;
foreach($this->facets as $facet){
$current_facet_normal = $facet->GetNormalPosition();
$current_vertex_loop = $facet->GetVertexLoop();
$ni = $current_facet_normal['i'];
$nj = $current_facet_normal['j'];
$nk = $current_facet_normal['k'];
$output .= "facet normal $ni $nj $nk" . @$this->comments[$line] . PHP_EOL;
$line++;
$output .= " outer loop" . @$this->comments[$line] . PHP_EOL;
$line++;
foreach($current_vertex_loop as $vertex){
$vx = $vertex['x'];
$vy = $vertex['y'];
$vz = $vertex['z'];
$output .= " vertex $vx $vy $vz" . @$this->comments[$line] . PHP_EOL;
$line++;
}
$output .= " endloop" . @$this->comments[$line] . PHP_EOL;
$line++;
$output .= "endfacet" . @$this->comments[$line] . PHP_EOL;
$line++;
}
$output .= 'endsolid ' . $this->name . @$this->comments[$line] . PHP_EOL;
// add any end of file comments
$number_of_comments = count($this->comments);
while($line <= $number_of_comments){
$output .= @$this->comments[$line] . PHP_EOL;
$line++;
}
// write file
if(strlen($output) > 0){
file_put_contents($stl_file, $output);
}
else{
trigger_error("STLObject contains no data". PHP_EOL, E_USER_ERROR);
}
}
else{
trigger_error("ExportSTLFile(STL File Path) file name must be longer than 4 chars". PHP_EOL, E_USER_ERROR);
}
}
public function AddFacet($ni = 0, $nj = 0, $nk = 0, $vertex_loop = array()){
$this->facets[] = new Facet($ni, $nj, $nk, $vertex_loop);
}
public function SetName($name = ''){
$this->name = $name;
}
}