add exe icon,

signal-slot for openFile,
resetView on openFile,
cleanup when open a new file,
triangulate quad poly now correctly, more not working, bug from previous version,
next:
fix 5,6,.. triangulation,
triClothMan, IC Helmet, still buggy,

QtMeshViewer/Source/GeometryEngine.cpp

@@ -10,23 +10,12 @@ GeometryEngine::GeometryEngine()
 {
 	initializeOpenGLFunctions();
 
-	// Generate 2 VBOs
-	m_arrayBuf.create();
-	m_indexBuf.create();
-
-	// Initializes cube geometry and transfers it to VBOs
-	loadFile("..\\Release\\Msh\\ic_helmet.msh");
+	loadFile("..\\Release\\Msh\\4-Poly.msh");
 }
 
 GeometryEngine::~GeometryEngine()
 {
-	m_arrayBuf.destroy();
-	m_indexBuf.destroy();
-
-	for (auto it : m_textures)
-		delete it;
-	m_textures.clear();
-	m_drawList.clear();
+	clearData();
 }
 
 
@@ -35,6 +24,14 @@ GeometryEngine::~GeometryEngine()
 
 void GeometryEngine::loadFile(const char* filePath)
 {
+	// cleanup old stuff and recreate buffers
+	clearData();
+	m_arrayBuf.create();
+	m_indexBuf.create();
+
+	//reset view
+	emit requestResetView();
+
 	try
 	{
 		//TODO normalize
@@ -134,12 +131,28 @@ void GeometryEngine::loadTexture(const char* filePath)
 	m_textures.push_back(new_texture);
 }
 
+void GeometryEngine::clearData()
+{
+	if (m_arrayBuf.isCreated())
+		m_arrayBuf.destroy();
+	if (m_indexBuf.isCreated())
+		m_indexBuf.destroy();
+
+	for (auto it : m_textures)
+		delete it;
+	m_textures.clear();
+	m_drawList.clear();
+}
+
 
 /////////////////////////////////////////////////////////////////////////
 // public functions
 
 void GeometryEngine::drawGeometry(QOpenGLShaderProgram *program)
 {
+	if (!m_arrayBuf.isCreated() || !m_indexBuf.isCreated())
+		return;
+
 // Setup
 	// Tell OpenGL which VBOs to use
 	m_arrayBuf.bind();