add ElementArrayBuffer::setDataElements

include/ACGL/OpenGL/Controller/ElementArrayBufferControl.hh

@@ -56,8 +56,7 @@ public:
         {
             elementArrayBuffer->bind();
 
-            GLsizeiptr bytesInBuffer = mElements / getGLTypeSize(mType);
-            elementArrayBuffer->setData( bytesInBuffer, mpData );
+            elementArrayBuffer->setDataElements(mElements, mpData);
         }
         return elementArrayBuffer;
     }

include/ACGL/OpenGL/Objects/ElementArrayBuffer.hh

@@ -59,13 +59,21 @@ public:
     //! datatype of the indices
     inline void setType (GLenum _type) { mType = _type; }
 
+    //! set data for this buffer for a given number of elements (size in bytes == _elements * size of mType)
+    inline void setDataElements( uint_t _elements, const GLvoid *_pData = NULL, GLenum _usage = GL_STATIC_DRAW )
+    {
+        setData( mTarget, _elements * getGLTypeSize(mType), _pData, _usage );
+    }
+
     //! Returns the number of indices:
-    GLuint getElements() {
+    inline GLuint getElements() const
+    {
         return (GLuint)( getSize() / getGLTypeSize(mType));
     }
 
     //! Overloaded from the base class to _prevent_ redefining of the binding target! (see Buffer)
-    inline void setTarget( GLenum ) {
+    inline void setTarget( GLenum )
+    {
         ACGL::Utils::error() << "DON'T redefine the target binding point of an ElementArrayBuffer" << std::endl;
     }