MeshBuilder: reworked index builder.

Moved code which doesn't depend on index type outside this templated
function for smaller size of generated code.

src/MeshBuilder.h

@@ -274,8 +274,11 @@ template<class Vertex> class MeshBuilder {
          * them.
          * @note The mesh is @b not cleaned before building.
          */
-        inline void build(IndexedMesh* mesh, Buffer* vertexBuffer, Buffer::Usage vertexBufferUsage, Buffer::Usage indexBufferUsage) {
-            SizeBasedCall<InternalBuilder>(_vertices.size())(this, mesh, vertexBuffer, vertexBufferUsage, indexBufferUsage);
+        void build(IndexedMesh* mesh, Buffer* vertexBuffer, Buffer::Usage vertexBufferUsage, Buffer::Usage indexBufferUsage) {
+            mesh->setPrimitive(Mesh::Triangles);
+            mesh->setVertexCount(_vertices.size());
+            vertexBuffer->setData(sizeof(Vertex)*_vertices.size(), _vertices.data(), vertexBufferUsage);
+            SizeBasedCall<IndexBuilder>(_vertices.size())(mesh, _faces, indexBufferUsage);
         }
 
         /**
@@ -315,25 +318,22 @@ template<class Vertex> class MeshBuilder {
             HashedVertex(VertexPointer oldVertexPointer, VertexPointer newVertexPointer): oldVertexPointer(oldVertexPointer), newVertexPointer(newVertexPointer) {}
         };
 
-        struct InternalBuilder {
-            template<class IndexType> static void run(MeshBuilder<Vertex>* builder, IndexedMesh* mesh, Buffer* vertexBuffer, Buffer::Usage vertexBufferUsage, Buffer::Usage indexBufferUsage) {
-                /* Compress face array to index array. Using TypeTraits::IndexType
-                to ensure we have allowed type for indexing */
+        struct IndexBuilder {
+            template<class IndexType> static void run(IndexedMesh* mesh, const std::vector<Face>& faces, Buffer::Usage indexBufferUsage) {
+                /* Compress face array to index array. Using
+                   TypeTraits::IndexType to ensure we have allowed type for
+                   indexing */
                 std::vector<typename TypeTraits<IndexType>::IndexType> indices;
-                indices.reserve(builder->_faces.size()*3);
-                for(auto it = builder->_faces.cbegin(); it != builder->_faces.cend(); ++it) {
+                indices.reserve(faces.size()*3);
+                for(auto it = faces.cbegin(); it != faces.cend(); ++it) {
                     indices.push_back(it->vertices[0]);
                     indices.push_back(it->vertices[1]);
                     indices.push_back(it->vertices[2]);
                 }
 
-                /* Update mesh parameters and fill it with data */
-                mesh->setPrimitive(Mesh::Triangles);
-                mesh->setVertexCount(builder->_vertices.size());
+                /* Update mesh parameters and fill index buffer */
                 mesh->setIndexCount(indices.size());
                 mesh->setIndexType(TypeTraits<IndexType>::glType());
-
-                vertexBuffer->setData(sizeof(Vertex)*builder->_vertices.size(), builder->_vertices.data(), vertexBufferUsage);
                 mesh->indexBuffer()->setData(sizeof(IndexType)*indices.size(), indices.data(), indexBufferUsage);
             }
         };