优化ply模型文件大小

examples/loadObjDemo.php

@@ -9,8 +9,8 @@ include dirname(dirname(__FILE__)) . "/vendor/autoload.php";
 
 ini_set('memory_limit','4096M');
 
-$ply = new LoardObj('/home/yuanjiajia/Desktop/blender/test/3D.obj',LoardObj::CLOSE);
-$ply = $ply->toPly();
+$ply = new LoardObj('/home/yuanjiajia/Desktop/blender/test/202112201847576528.obj',LoardObj::CLOSE);
+$ply = $ply->toPly(null,LoardObj::TYPE_TXT);
 
 var_dump($ply );
 

src/core/LoardObj.php

@@ -40,7 +40,8 @@ class LoardObj
     }
 
     /**
-     * @param string $format 储存 ply模型 的格式
+     * @param string $path  ply模型 保存路径
+     * @param string $format ply模型  保存格式
      */
     public function toPly( string $path = null,string $format = self::TYPE_BINARY)
     {
@@ -151,9 +152,11 @@ class LoardObj
         
         foreach( $this->objData['meshs'] as $meshs_key => $meshs_value )
         {   
-            $ply = [];
-            $vCount = 0;
-            $fCount = 0;
+            $ply['vertex'] = [];
+            $ply['face'] = [];
+            $ply['header'] = [];
+            $indexesList = [];
+            $vConst = 0;
 
             foreach( $meshs_value as $face_value )                                      // 生成顶点和面数据
             {   
@@ -178,23 +181,32 @@ class LoardObj
 
                         case 0;
                             $vn = $this->objData['vn'][$v_value-1];
-                            $ply['vertex'][$vCount] = implode(' ',$v).' '.implode(' ',$vn).' '.implode(' ',$vt);
-                            $lineFace[] = $vCount;
-                            $vCount++;
+                            $vnt = implode(' ',$v).' '.implode(' ',$vn).' '.implode(' ',$vt);
+                            $hashVar = hash('md5', $vnt);
+                            if( !array_key_exists($hashVar, $indexesList) )
+                            {
+                                $ply['vertex'][$vConst] = $vnt;
+                                $lineFace[] = $vConst;
+                                $indexesList[$hashVar] = $vConst;
+                                $vConst++;
+                            }
+                            else
+                            {   
+                                $lineFace[] = $indexesList[$hashVar];
+                            }
                             break;
                         
                         default:
                             ;
                     }
                 }
-                $ply['face'][$fCount] = count($lineFace).' '.implode(' ',$lineFace);
-                $fCount++;
+                $ply['face'][] = count($lineFace).' '.implode(' ',$lineFace);
             }
 
             $ply['header'][] = 'ply';                                                   // 生成头部数据
             $ply['header'][] = "format ";
             $ply['header'][] = "comment Created by reaiyunju, source file: ''";
-            $ply['header'][] = "element vertex ".$vCount;
+            $ply['header'][] = "element vertex ".$vConst;
             $ply['header'][] = "property float x";
             $ply['header'][] = "property float y";
             $ply['header'][] = "property float z";