Changeset 3075 in orxonox.OLD for orxonox

Timestamp:

Dec 4, 2004, 2:50:49 AM (20 years ago)

Author:

bensch

Message:

orxonox/trunk/importer: auto-Vertex-Normals implemented

Location:

orxonox/trunk/importer

Files:

• object.cc (modified) (2 diffs)
• object.h (modified) (2 diffs)

orxonox/trunk/importer/object.cc

@@ -658 +658 @@
   vertices->finalizeArray();
   vTexture->finalizeArray();
+  if (normals->getCount() == 0) // vertices-Array must be uilt for this
+    buildVertexNormals();
   normals->finalizeArray();
 
@@ -766 +768 @@
 
 
+bool Object::buildVertexNormals ()
+{
+
+  Vector* normArray = new Vector [vertices->getCount()/3];
+  for (int i=0; i<=vertices->getCount()/3;i++)
+    normArray[i] = Vector(.0,.0,.0);
+
+  int firstTouch;
+  int secondTouch;
+  Vector prevV;
+  Vector nextV;
+  Vector curV;
+
+  Group* tmpGroup = firstGroup;
+  while (tmpGroup)
+    {
+      Face* tmpFace = tmpGroup->firstFace;
+      while (tmpFace)
+        {
+          if (tmpFace->firstElem)
+            {
+              FaceElement* firstElem = tmpFace->firstElem;
+              FaceElement* prevElem = firstElem;
+              FaceElement* curElem = prevElem->next;
+              
+              for (int j=1; j<tmpFace->vertexCount-1; j++)
+                {
+                  curElem->normalNumber = curElem->vertexNumber;
+                  
+                  curV = Vector (vertices->getArray()[curElem->vertexNumber*3], vertices->getArray()[curElem->vertexNumber*3+1], vertices->getArray()[curElem->vertexNumber*3+2]);
+                  prevV = Vector (vertices->getArray()[prevElem->vertexNumber*3], vertices->getArray()[prevElem->vertexNumber*3+1], vertices->getArray()[prevElem->vertexNumber*3+2]) - curV;
+                  nextV = Vector (vertices->getArray()[curElem->next->vertexNumber*3], vertices->getArray()[curElem->next->vertexNumber*3+1], vertices->getArray()[curElem->next->vertexNumber*3+2]) - curV;
+                  normArray[curElem->vertexNumber] = normArray[curElem->vertexNumber] + *(nextV.cross(prevV).getNormalized());
+
+                  // prevV.x, nextV.cross(prevV).x);
+                  
+                  prevElem = curElem;
+                  curElem = curElem->next;
+                }
+              firstElem->normalNumber = firstElem->vertexNumber;
+              
+              curV = Vector (vertices->getArray()[firstElem->vertexNumber*3], vertices->getArray()[firstElem->vertexNumber*3+1], vertices->getArray()[firstElem->vertexNumber*3+2]);
+              prevV = Vector (vertices->getArray()[prevElem->vertexNumber*3], vertices->getArray()[prevElem->vertexNumber*3+1], vertices->getArray()[prevElem->vertexNumber*3+2]) - curV;
+              nextV = Vector (vertices->getArray()[firstElem->next->vertexNumber*3], vertices->getArray()[firstElem->next->vertexNumber*3+1], vertices->getArray()[firstElem->next->vertexNumber*3+2]) - curV;
+              normArray[curElem->vertexNumber] = normArray[curElem->vertexNumber] + *(prevV.cross(nextV).getNormalized());
+              
+            }
+          tmpFace = tmpFace->next;
+        }
+      tmpGroup = tmpGroup->next;
+    }
+
+  for (int i=0; i<vertices->getCount()/3;i++)
+    {
+      normArray[i].normalize();
+      //      printf("%f, %f, %f.\n",normArray[i].x, normArray[i].y, normArray[i].z );
+      normals->addEntry(normArray[i].x, normArray[i].y, normArray[i].z);
+
+    }
+}
+
+
 /**
    \brief Includes a default object

orxonox/trunk/importer/object.h

@@ -12 +12 @@
 #include "array.h"
 #include "material.h"
+#include "vector.h"
 #include <fstream>
 
@@ -112 +113 @@
   bool addGLElement (FaceElement* elem);
 
+  bool buildVertexNormals ();
+
   void BoxObject (void);
 };