calculate normal matrix once in cpp (performance),

added bool variable to turn light on/off (still needs button),

QtMeshViewer/Source/OglViewerWidget.cpp

@@ -226,7 +226,8 @@ void OglViewerWidget::paintGL()
 	// Set view-projection matrix
 	m_program.setUniformValue("vp_matrix", m_projection * view);
 
-	// Set Light
+	// Set Light values
+	m_program.setUniformValue("b_light", m_lightOn);
 	m_program.setUniformValue("light.position", m_light.position);
 	m_program.setUniformValue("light.intensities", m_light.intensities);