Changeset 891 for GTP/trunk/Lib/Geom/shared/GeoTool/src/GeoMeshLoader.cpp

Timestamp:

05/04/06 12:56:05 (19 years ago)

Author:

gumbau

Message:

 

File:

• GTP/trunk/Lib/Geom/shared/GeoTool/src/GeoMeshLoader.cpp (modified) (1 diff)

GTP/trunk/Lib/Geom/shared/GeoTool/src/GeoMeshLoader.cpp

@@ -858 +858 @@
         }
 
+        //      Remove degenerate triangles of a submesh given.
+        geoSubMesh      =       removeDegenerateTriangles(geoSubMesh);
+
+        return  geoSubMesh;
+}
+
+//      Remove degenerate triangles of a submesh given.
+SubMesh *       GeoMeshLoader::removeDegenerateTriangles(SubMesh        *geoSubMesh)
+{
+        Index           *indices;
+        Index           *index;
+        Index           *indexBegin;
+        Index           *indexEnd;
+        Index           *new_strip_starts;
+        size_t  new_index_count;
+        size_t  current_index;
+
+        //      Stores the new starts of strips.
+        new_strip_starts        =       new     Index[geoSubMesh->mStripCount];
+        
+        //      Calculate the new index count.
+        new_index_count =       geoSubMesh->mIndexCount 
+                -
+                (2 * geoSubMesh->mStripCount)
+                +
+                2;
+
+        //      Auxiliar index array.
+        indices =       new     Index[new_index_count];
+
+        //      Initialize the current index;
+        current_index   =       0;
+        
+        //      For each one of the strips.
+        for (int strip = 0; strip < geoSubMesh->mStripCount; strip++)
+        {
+                //      Stars of strip without degenerate triangles.
+                new_strip_starts[strip] =       current_index;
+                
+                //      First index of the strip.
+                indexBegin      =       geoSubMesh->mStrip[strip];
+
+                //      If is the final strip
+                if (strip       == (geoSubMesh->mStripCount - 1))
+                {
+                        //      The end of the index array.
+                        indexEnd        = &geoSubMesh->mIndex[geoSubMesh->mIndexCount];
+                }
+                else
+                {
+                        //      The beginning of the next strip.
+                        indexEnd        = geoSubMesh->mStrip[strip + 1];
+                }
+
+                int i;
+                i       = 0;
+
+                //      If is not the first strip.
+                if (strip != 0)
+                {
+                        indexBegin++;
+                }
+
+                //      If is not the last strip.
+                if (strip       != (geoSubMesh->mStripCount - 1))
+                {
+                        indexEnd--;
+                }
+
+                //      For each index of the strip.
+                for (index = indexBegin; index < indexEnd; index++)
+                {
+                        indices[current_index++]        =       indexBegin[i];
+
+                        //      Increments i.
+                        i++;
+                }
+
+        }
+
+        //      Free Index memory.
+        delete  []geoSubMesh->mIndex;
+
+        //      Update index count.
+        geoSubMesh->mIndexCount =       new_index_count;
+
+        geoSubMesh->mIndex      =       new     Index[new_index_count];
+
+        //      Store new index array without degenerate triangles.
+        for (size_t     i       =       0;      i       <       geoSubMesh->mIndexCount; i++)
+        {
+                geoSubMesh->mIndex[i]   =       indices[i];
+        }
+
+        //      Free auxiliar index array;
+        delete  []indices;
+
+        //      Update start of the strip.
+        for (int        strip   =       0; strip < geoSubMesh->mStripCount; strip++)
+        {
+                geoSubMesh->mStrip[strip]       =       &geoSubMesh->mIndex[new_strip_starts[strip]];
+        }
+
+        //      Free auxiliar strip starts.
+        delete  []new_strip_starts;
+        
         return  geoSubMesh;
 }