Merge pull request #1981 from smalcom/qt_assimp_viewer

Qt assimp viewer and few fixes in another places

.gitignore

@@ -12,6 +12,8 @@ build
 bin/
 lib/
 
+# QtCreator
+CMakeLists.txt.user
 
 # Generated
 assimp.pc

CMakeLists.txt

@@ -412,32 +412,7 @@ IF ( ASSIMP_BUILD_ASSIMP_TOOLS )
   ENDIF ( WIN32 AND DirectX_D3DX9_LIBRARY )
 
   ADD_SUBDIRECTORY( tools/assimp_cmd/ )
-
-  # Check dependencies for assimp_qt_viewer.
-  # Why here? Maybe user do not want Qt viewer and have no Qt.
-  # Why assimp_qt_viewer/CMakeLists.txt still contain similar check?
-  # Because viewer can be build independently of Assimp.
-  FIND_PACKAGE(Qt5Widgets QUIET)
-  FIND_PACKAGE(DevIL QUIET)
-  FIND_PACKAGE(OpenGL QUIET)
-  IF ( Qt5Widgets_FOUND AND IL_FOUND AND OPENGL_FOUND)
   ADD_SUBDIRECTORY( tools/assimp_qt_viewer/ )
-  ELSE()
-    SET ( ASSIMP_QT_VIEWER_DEPENDENCIES "")
-    IF (NOT Qt5_FOUND)
-      SET ( ASSIMP_QT_VIEWER_DEPENDENCIES "${ASSIMP_QT_VIEWER_DEPENDENCIES} Qt5")
-    ENDIF (NOT Qt5_FOUND)
-
-    IF (NOT IL_FOUND)
-      SET ( ASSIMP_QT_VIEWER_DEPENDENCIES "${ASSIMP_QT_VIEWER_DEPENDENCIES} DevIL")
-    ENDIF (NOT IL_FOUND)
-
-    IF (NOT OPENGL_FOUND)
-      SET ( ASSIMP_QT_VIEWER_DEPENDENCIES "${ASSIMP_QT_VIEWER_DEPENDENCIES} OpengGL")
-    ENDIF (NOT OPENGL_FOUND)
-
-    MESSAGE (WARNING "Build of assimp_qt_viewer is disabled. Unsatisfied dendencies: ${ASSIMP_QT_VIEWER_DEPENDENCIES}")
-  ENDIF ( Qt5Widgets_FOUND AND IL_FOUND AND OPENGL_FOUND)
 ENDIF ( ASSIMP_BUILD_ASSIMP_TOOLS )
 
 IF ( ASSIMP_BUILD_SAMPLES)

code/3DSLoader.cpp

@@ -71,7 +71,7 @@ static const aiImporterDesc desc = {
     0,
     0,
     0,
-    "3ds prj 3DS PRJ"
+	"3ds prj"
 };
 
 
@@ -127,7 +127,7 @@ Discreet3DSImporter::~Discreet3DSImporter() {
 // Returns whether the class can handle the format of the given file.
 bool Discreet3DSImporter::CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig) const {
     std::string extension = GetExtension(pFile);
-    if(extension == "3ds" || extension == "3DS" || extension == "prj"|| extension == "PRJ" ) {
+	if(extension == "3ds" || extension == "prj") {
         return true;
     }
 

code/D3MFExporter.cpp

@@ -222,7 +222,7 @@ void D3MFExporter::writeMetaData() {
         return;
     }
 
-    const aiString *key;
+	const aiString *key = nullptr;
     const aiMetadataEntry *entry(nullptr);
     for ( size_t i = 0; i < numMetaEntries; ++i ) {
         mScene->mMetaData->Get( i, key, entry );

code/Importer.cpp

@@ -970,6 +970,8 @@ void Importer::GetExtensionList(aiString& szOut) const
         (*i)->GetExtensionList(str);
     }
 
+	// List can be empty
+	if( !str.empty() ) {
 		for (std::set<std::string>::const_iterator it = str.begin();; ) {
 			szOut.Append("*.");
 			szOut.Append((*it).c_str());
@@ -979,6 +981,7 @@ void Importer::GetExtensionList(aiString& szOut) const
 			}
 			szOut.Append(";");
 		}
+	}
     ASSIMP_END_EXCEPTION_REGION(void);
 }
 

code/glTF2Exporter.cpp

@@ -516,7 +516,7 @@ void glTF2Exporter::ExportMaterials()
             if (mat->Get(AI_MATKEY_GLTF_PBRSPECULARGLOSSINESS_GLOSSINESS_FACTOR, pbrSG.glossinessFactor) != AI_SUCCESS) {
 				float shininess;
 
-                if (mat->Get(AI_MATKEY_SHININESS, shininess)) {
+				if (mat->Get(AI_MATKEY_SHININESS, shininess) == AI_SUCCESS) {
                     pbrSG.glossinessFactor = shininess / 1000;
                 }
             }

test/unit/utMetadata.cpp

@@ -210,7 +210,7 @@ TEST_F( utMetadata, copy_test ) {
 
     // int32_t test
     {
-        int32_t v;
+		int32_t v = 0;
         bool ok = copy.Get( "int32", v );
         EXPECT_TRUE( ok );
         EXPECT_EQ( i32v, v );

test/unit/utSharedPPData.cpp

@@ -78,7 +78,7 @@ TEST_F(SharedPPDataTest, testPODProperty)
 {
     int i = 5;
     shared->AddProperty("test",i);
-    int o;
+	int o = 0;
     EXPECT_TRUE(shared->GetProperty("test",o));
     EXPECT_EQ(5, o);
     EXPECT_FALSE(shared->GetProperty("test2",o));

tools/assimp_qt_viewer/CMakeLists.txt

@@ -3,44 +3,103 @@ project(assimp_qt_viewer)
 
 cmake_minimum_required(VERSION 2.6)
 
-find_package(Qt5 COMPONENTS Gui Widgets OpenGL REQUIRED)
+OPTION( ASSIMP_QT4_VIEWER
-find_package(DevIL REQUIRED)
+	"Set to ON to enable Qt4 against Qt5 for assimp_qt_viewer"
-find_package(OpenGL REQUIRED)
+	OFF
+)
 
-include_directories(
+FIND_PACKAGE(DevIL QUIET)
-	${Qt5Widgets_INCLUDES}
+FIND_PACKAGE(OpenGL QUIET)
+
+IF(ASSIMP_QT4_VIEWER)
+	# Qt4 version
+	FIND_PACKAGE(Qt4 QUIET)
+ELSE(ASSIMP_QT4_VIEWER)
+	# Qt5 version
+	FIND_PACKAGE(Qt5 COMPONENTS Gui Widgets OpenGL QUIET)
+ENDIF(ASSIMP_QT4_VIEWER)
+
+SET(VIEWER_BUILD:BOOL FALSE)
+
+IF((Qt4_FOUND OR Qt5Widgets_FOUND) AND IL_FOUND AND OPENGL_FOUND)
+	SET(VIEWER_BUILD TRUE)
+
+ELSE((Qt4_FOUND OR Qt5Widgets_FOUND) AND IL_FOUND AND OPENGL_FOUND)
+	SET ( ASSIMP_QT_VIEWER_DEPENDENCIES "")
+
+	IF(ASSIMP_QT4_VIEWER)
+		IF (NOT Qt4_FOUND)
+			SET ( ASSIMP_QT_VIEWER_DEPENDENCIES "${ASSIMP_QT_VIEWER_DEPENDENCIES} Qt4")
+		ENDIF (NOT Qt4_FOUND)
+
+	ELSE(ASSIMP_QT4_VIEWER)
+		IF (NOT Qt5_FOUND)
+			SET ( ASSIMP_QT_VIEWER_DEPENDENCIES "${ASSIMP_QT_VIEWER_DEPENDENCIES} Qt5")
+		ENDIF (NOT Qt5_FOUND)
+
+	ENDIF(ASSIMP_QT4_VIEWER)
+
+	IF (NOT IL_FOUND)
+		SET ( ASSIMP_QT_VIEWER_DEPENDENCIES "${ASSIMP_QT_VIEWER_DEPENDENCIES} DevIL")
+	ENDIF (NOT IL_FOUND)
+
+	IF (NOT OPENGL_FOUND)
+		SET ( ASSIMP_QT_VIEWER_DEPENDENCIES "${ASSIMP_QT_VIEWER_DEPENDENCIES} OpengGL")
+	ENDIF (NOT OPENGL_FOUND)
+
+	MESSAGE (WARNING "Build of assimp_qt_viewer is disabled. Unsatisfied dendencies: ${ASSIMP_QT_VIEWER_DEPENDENCIES}")
+ENDIF((Qt4_FOUND OR Qt5Widgets_FOUND) AND IL_FOUND AND OPENGL_FOUND)
+
+IF(VIEWER_BUILD)
+	INCLUDE_DIRECTORIES(
 		${Assimp_SOURCE_DIR}/include
 		${Assimp_SOURCE_DIR}/code
 		${CMAKE_CURRENT_BINARY_DIR}
 		${CMAKE_SOURCE_DIR}
 		${OPENGL_INCLUDE_DIR}
 		${IL_INCLUDE_DIR}
-)
+	)
 
-link_directories(${Assimp_BINARY_DIR})
+	LINK_DIRECTORIES(${Assimp_BINARY_DIR})
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -pedantic -Wall")
+	SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -pedantic -Wall")
 
-set(assimp_qt_viewer_SRCS main.cpp loggerview.cpp glview.cpp mainwindow.cpp)
+	SET(assimp_qt_viewer_SRCS main.cpp loggerview.cpp glview.cpp mainwindow.cpp)
-qt5_wrap_ui(UISrcs mainwindow.ui)
-qt5_wrap_cpp(MOCrcs mainwindow.hpp glview.hpp)
 
-add_executable(${PROJECT_NAME} ${assimp_qt_viewer_SRCS} ${UISrcs} ${MOCrcs})
+	IF(ASSIMP_QT4_VIEWER)
-target_link_libraries(${PROJECT_NAME} Qt5::Gui Qt5::Widgets Qt5::OpenGL ${IL_LIBRARIES} ${OPENGL_LIBRARIES} assimp)
+		MESSAGE("assimp_qt_viewer use Qt4")
+		ADD_DEFINITIONS( -DASSIMP_QT4_VIEWER )
+		INCLUDE_DIRECTORIES(${QT_INCLUDES})
+		qt4_wrap_ui(UISrcs mainwindow.ui)
+		qt4_wrap_cpp(MOCrcs mainwindow.hpp glview.hpp)
+	ELSE()
+		MESSAGE("assimp_qt_viewer use Qt5")
+		INCLUDE_DIRECTORIES(${Qt5Widgets_INCLUDES})
+		qt5_wrap_ui(UISrcs mainwindow.ui)
+		qt5_wrap_cpp(MOCrcs mainwindow.hpp glview.hpp)
+	ENDIF()
 
-if(WIN32) # Check if we are on Windows
+	add_executable(${PROJECT_NAME} ${assimp_qt_viewer_SRCS} ${UISrcs} ${MOCrcs})
-	if(MSVC) # Check if we are using the Visual Studio compiler
+
+	IF(ASSIMP_QT4_VIEWER)
+		target_link_libraries(${PROJECT_NAME} ${QT_LIBRARIES} ${QT_QTCORE_LIBRARY} ${QT_QTGUI_LIBRARY} ${QT_QTOPENGL_LIBRARY} ${IL_LIBRARIES} ${OPENGL_LIBRARIES} assimp)
+	ELSE()
+		target_link_libraries(${PROJECT_NAME} Qt5::Gui Qt5::Widgets Qt5::OpenGL ${IL_LIBRARIES} ${OPENGL_LIBRARIES} assimp)
+	ENDIF()
+
+	IF(WIN32) # Check if we are on Windows
+		IF(MSVC) # Check if we are using the Visual Studio compiler
 			#set_target_properties(TestProject PROPERTIES LINK_FLAGS_RELEASE "/SUBSYSTEM:WINDOWS")
-	elseif(CMAKE_COMPILER_IS_GNUCXX)
+		ELSEIF(CMAKE_COMPILER_IS_GNUCXX)
 			# SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mwindows") # Not tested
-	else()
+		ELSE()
-		message(SEND_ERROR "You are using an unsupported Windows compiler! (Not MSVC or GCC)")
+			MESSAGE(SEND_ERROR "You are using an unsupported Windows compiler! (Not MSVC or GCC)")
-	endif()
+		ENDIF()
-elseif(UNIX)
+	ELSEIF(UNIX)
 		# Nothing special required
-else()
+	ELSE()
-	message(SEND_ERROR "You are on an unsupported platform! (Not Win32 or Unix)")
+		MESSAGE(SEND_ERROR "You are on an unsupported platform! (Not Win32 or Unix)")
-endif()
+	ENDIF()
 
-set_property(TARGET ${PROJECT_NAME} PROPERTY DEBUG_POSTFIX ${CMAKE_DEBUG_POSTFIX})
+	SET_PROPERTY(TARGET ${PROJECT_NAME} PROPERTY DEBUG_POSTFIX ${CMAKE_DEBUG_POSTFIX})
-
+	INSTALL(TARGETS assimp_qt_viewer DESTINATION "${ASSIMP_BIN_INSTALL_DIR}")
-install(TARGETS assimp_qt_viewer DESTINATION "${ASSIMP_BIN_INSTALL_DIR}")
+ENDIF(VIEWER_BUILD)

tools/assimp_qt_viewer/glview.cpp

@@ -5,6 +5,9 @@
 
 #include "glview.hpp"
 
+// Header files, Qt.
+#include <QTime>
+
 // Header files, OpenGL.
 #if defined(__APPLE__)
 # include <OpenGL/glu.h>
@@ -58,6 +61,33 @@ void CGLView::SHelper_Camera::SetDefault()
 /************ CGLView *************/
 /**********************************/
 
+#if !ASSIMP_QT4_VIEWER
+#	define ConditionalContextControl_Begin \
+		bool ContextEnabledHere; \
+		\
+		if(mGLContext_Current) \
+		{ \
+			ContextEnabledHere = false; \
+		} \
+		else \
+		{ \
+			makeCurrent(); \
+			mGLContext_Current = true; \
+			ContextEnabledHere = true; \
+		} \
+		\
+		do {} while(false)
+
+#	define ConditionalContextControl_End \
+		if(ContextEnabledHere) \
+		{ \
+			doneCurrent(); \
+			mGLContext_Current = false; \
+		} \
+		\
+		do {} while(false)
+#endif // ASSIMP_QT4_VIEWER
+
 void CGLView::Material_Apply(const aiMaterial* pMaterial)
 {
     GLfloat tcol[4];
@@ -105,7 +135,7 @@ void CGLView::Material_Apply(const aiMaterial* pMaterial)
 
 	glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, tcol);
 	// Shininess
-	float shininess, strength;
+	ai_real shininess, strength;
 
 	max = 1;
 	ret1 = aiGetMaterialFloatArray(pMaterial, AI_MATKEY_SHININESS, &shininess, &max);
@@ -406,9 +436,9 @@ void CGLView::BBox_GetFromVertices(const aiVector3D* pVertices, const size_t pVe
 
 	for(size_t idx_vert = 1; idx_vert < pVerticesQuantity; idx_vert++)
 	{
-		const GLfloat x = pVertices[idx_vert].x;
+		const ai_real x = pVertices[idx_vert].x;
-		const GLfloat y = pVertices[idx_vert].y;
+		const ai_real y = pVertices[idx_vert].y;
-		const GLfloat z = pVertices[idx_vert].z;
+		const ai_real z = pVertices[idx_vert].z;
 
 		// search minimal...
 		AssignIfLesser(&pBBox.Minimum.x, x);
@@ -446,7 +476,12 @@ void CGLView::Draw_Node(const aiNode* pNode)
 	// Apply node transformation matrix.
 	mat_node.Transpose();
 	glPushMatrix();
+#if ASSIMP_DOUBLE_PRECISION
+	glMultMatrixd((GLdouble*)mat_node[0]);
+#else
 	glMultMatrixf((GLfloat*)&mat_node);
+#endif // ASSIMP_DOUBLE_PRECISION
+
 	// Draw all meshes assigned to this node
 	for(size_t idx_mesh_arr = 0; idx_mesh_arr < pNode->mNumMeshes; idx_mesh_arr++) Draw_Mesh(pNode->mMeshes[idx_mesh_arr]);
 
@@ -473,13 +508,21 @@ void CGLView::Draw_Mesh(const size_t pMesh_Index)
 	// Vertices array
 	//
 	glEnableClientState(GL_VERTEX_ARRAY);
+#if ASSIMP_DOUBLE_PRECISION
+	glVertexPointer(3, GL_DOUBLE, 0, mesh_cur.mVertices);
+#else
 	glVertexPointer(3, GL_FLOAT, 0, mesh_cur.mVertices);
+#endif // ASSIMP_DOUBLE_PRECISION
 
 	if(mesh_cur.HasVertexColors(0))
 	{
 		glEnable(GL_COLOR_MATERIAL);///TODO: cache
 		glEnableClientState(GL_COLOR_ARRAY);
+#if ASSIMP_DOUBLE_PRECISION
+		glColorPointer(4, GL_DOUBLE, 0, mesh_cur.mColors[0]);
+#else
 		glColorPointer(4, GL_FLOAT, 0, mesh_cur.mColors[0]);
+#endif // ASSIMP_DOUBLE_PRECISION
 	}
 
 	//
@@ -488,7 +531,11 @@ void CGLView::Draw_Mesh(const size_t pMesh_Index)
 	if(mesh_cur.HasTextureCoords(0))
 	{
 		glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+#if ASSIMP_DOUBLE_PRECISION
+		glTexCoordPointer(2, GL_DOUBLE, sizeof(aiVector3D), mesh_cur.mTextureCoords[0]);
+#else
 		glTexCoordPointer(2, GL_FLOAT, sizeof(aiVector3D), mesh_cur.mTextureCoords[0]);
+#endif // ASSIMP_DOUBLE_PRECISION
 	}
 
 	//
@@ -497,7 +544,11 @@ void CGLView::Draw_Mesh(const size_t pMesh_Index)
 	if(mesh_cur.HasNormals())
 	{
 		glEnableClientState(GL_NORMAL_ARRAY);
+#if ASSIMP_DOUBLE_PRECISION
+		glNormalPointer(GL_DOUBLE, 0, mesh_cur.mNormals);
+#else
 		glNormalPointer(GL_FLOAT, 0, mesh_cur.mNormals);
+#endif // ASSIMP_DOUBLE_PRECISION
 	}
 
 	//
@@ -530,22 +581,46 @@ void CGLView::Draw_BBox(const SBBox& pBBox)
 	glBindTexture(GL_TEXTURE_1D, 0);
 	glBindTexture(GL_TEXTURE_2D, 0);
 	glBindTexture(GL_TEXTURE_3D, 0);
+#if ASSIMP_QT4_VIEWER
 	qglColor(QColor(Qt::white));
+#else
+	const QColor c_w(Qt::white);
+
+	glColor3f(c_w.redF(), c_w.greenF(), c_w.blueF());
+#endif // ASSIMP_QT4_VIEWER
+
 	glBegin(GL_LINE_STRIP);
+#	if ASSIMP_DOUBLE_PRECISION
+		glVertex3dv(&vertex[0][0]), glVertex3dv(&vertex[1][0]), glVertex3dv(&vertex[2][0]), glVertex3dv(&vertex[3][0]), glVertex3dv(&vertex[0][0]);// "Minimum" side.
+		glVertex3dv(&vertex[4][0]), glVertex3dv(&vertex[5][0]), glVertex3dv(&vertex[6][0]), glVertex3dv(&vertex[7][0]), glVertex3dv(&vertex[4][0]);// Edge and "maximum" side.
+#	else
 		glVertex3fv(&vertex[0][0]), glVertex3fv(&vertex[1][0]), glVertex3fv(&vertex[2][0]), glVertex3fv(&vertex[3][0]), glVertex3fv(&vertex[0][0]);// "Minimum" side.
 		glVertex3fv(&vertex[4][0]), glVertex3fv(&vertex[5][0]), glVertex3fv(&vertex[6][0]), glVertex3fv(&vertex[7][0]), glVertex3fv(&vertex[4][0]);// Edge and "maximum" side.
+#	endif // ASSIMP_DOUBLE_PRECISION
 	glEnd();
+
 	glBegin(GL_LINES);
+#	if ASSIMP_DOUBLE_PRECISION
+		glVertex3dv(&vertex[1][0]), glVertex3dv(&vertex[5][0]);
+		glVertex3dv(&vertex[2][0]), glVertex3dv(&vertex[6][0]);
+		glVertex3dv(&vertex[3][0]), glVertex3dv(&vertex[7][0]);
+#	else
 		glVertex3fv(&vertex[1][0]), glVertex3fv(&vertex[5][0]);
 		glVertex3fv(&vertex[2][0]), glVertex3fv(&vertex[6][0]);
 		glVertex3fv(&vertex[3][0]), glVertex3fv(&vertex[7][0]);
+#	endif // ASSIMP_DOUBLE_PRECISION
 	glEnd();
 	glDisable(GL_COLOR_MATERIAL);
 	if(mLightingEnabled) glEnable(GL_LIGHTING);
+
 }
 
 void CGLView::Enable_Textures(const bool pEnable)
 {
+#if !ASSIMP_QT4_VIEWER
+	ConditionalContextControl_Begin;
+#endif // ASSIMP_QT4_VIEWER
+
 	if(pEnable)
 	{
 		glEnable(GL_TEXTURE_1D);
@@ -558,30 +633,10 @@ void CGLView::Enable_Textures(const bool pEnable)
 		glDisable(GL_TEXTURE_2D);
 		glDisable(GL_TEXTURE_3D);
 	}
-}
 
-void CGLView::Enable_Axes(const bool pEnable){
+#if !ASSIMP_QT4_VIEWER
-	if(pEnable)
+	ConditionalContextControl_End;
-	{
+#endif // ASSIMP_QT4_VIEWER
-        this->mAxesEnabled = true;
-    }
-    else
-    {
-        this->mAxesEnabled = false;
-    }
-}
-
-void CGLView::Enable_Reload_Textures(const bool pEnable)
-{
-	if(pEnable)
-	{
-        this->mReloadTexturesEnabled = true;
-//      this->mScene->ImportTextures(this->mScene->pScenePath);
-	}
-    else
-    {
-        this->mReloadTexturesEnabled = false;
-    }
 }
 
 /********************************************************************/
@@ -590,7 +645,13 @@ void CGLView::Enable_Reload_Textures(const bool pEnable)
 
 void CGLView::initializeGL()
 {
+#if ASSIMP_QT4_VIEWER
 	qglClearColor(Qt::gray);
+#else
+	mGLContext_Current = true;
+	initializeOpenGLFunctions();
+	glClearColor(0.5f, 0.5f, 0.5f, 1.0f);
+#endif // ASSIMP_QT4_VIEWER
 	glShadeModel(GL_SMOOTH);
 
 	glEnable(GL_DEPTH_TEST);
@@ -607,23 +668,38 @@ void CGLView::initializeGL()
 	glCullFace(GL_BACK);
 
 	glFrontFace(GL_CCW);
+
+#if !ASSIMP_QT4_VIEWER
+	mGLContext_Current = false;
+#endif // ASSIMP_QT4_VIEWER
 }
 
 void CGLView::resizeGL(int pWidth, int pHeight)
 {
+#if !ASSIMP_QT4_VIEWER
+	mGLContext_Current = true;
+#endif // ASSIMP_QT4_VIEWER
 	mCamera_Viewport_AspectRatio = (GLdouble)pWidth / pHeight;
 	glViewport(0, 0, pWidth, pHeight);
 	glMatrixMode(GL_PROJECTION);
 	glLoadIdentity();
 	gluPerspective(mCamera_FOVY, mCamera_Viewport_AspectRatio, 1.0, 100000.0);///TODO: znear/zfar depend on scene size.
+#if !ASSIMP_QT4_VIEWER
+	mGLContext_Current = false;
+#endif // ASSIMP_QT4_VIEWER
 }
 
 void CGLView::drawCoordSystem() {
+	// Disable lighting. Colors must be bright and colorful)
+	if ( mLightingEnabled ) glDisable( GL_LIGHTING );///TODO: display list
+
+	// For same reason - disable textures.
 	glBindTexture(GL_TEXTURE_1D, 0);
     glBindTexture(GL_TEXTURE_2D, 0);
     glBindTexture(GL_TEXTURE_3D, 0);
     glEnable(GL_COLOR_MATERIAL);
     glBegin(GL_LINES);
+#if ASSIMP_QT4_VIEWER
 	// X, -X
     qglColor(QColor(Qt::red)), glVertex3f(0.0, 0.0, 0.0), glVertex3f(100000.0, 0.0, 0.0);
     qglColor(QColor(Qt::cyan)), glVertex3f(0.0, 0.0, 0.0), glVertex3f(-100000.0, 0.0, 0.0);
@@ -634,11 +710,30 @@ void CGLView::drawCoordSystem() {
     qglColor(QColor(Qt::blue)), glVertex3f(0.0, 0.0, 0.0), glVertex3f(0.0, 0.0, 100000.0);
     qglColor(QColor(Qt::yellow)), glVertex3f(0.0, 0.0, 0.0), glVertex3f(0.0, 0.0, -100000.0);
     qglColor(QColor(Qt::white));
+#else
+	// X, -X
+	glColor3f(1.0f, 0.0f, 0.0f), glVertex3f(0.0, 0.0, 0.0), glVertex3f(100000.0, 0.0, 0.0);
+	glColor3f(0.5f, 0.5f, 1.0f), glVertex3f(0.0, 0.0, 0.0), glVertex3f(-100000.0, 0.0, 0.0);
+	// Y, -Y
+	glColor3f(0.0f, 1.0f, 0.0f), glVertex3f(0.0, 0.0, 0.0), glVertex3f(0.0, 100000.0, 0.0);
+	glColor3f(1.0f, 0.0f, 1.0f), glVertex3f(0.0, 0.0, 0.0), glVertex3f(0.0, -100000.0, 0.0);
+	// Z, -Z
+	glColor3f(0.0f, 0.0f, 1.0f), glVertex3f(0.0, 0.0, 0.0), glVertex3f(0.0, 0.0, 100000.0);
+	glColor3f(1.0f, 1.0f, 0.0f), glVertex3f(0.0, 0.0, 0.0), glVertex3f(0.0, 0.0, -100000.0);
+	glColor3f(1.0f, 1.0f, 1.0f);
+#endif // ASSIMP_QT4_VIEWER
 	glEnd();
+	// Restore previous state of lighting.
+	if(mLightingEnabled) glEnable(GL_LIGHTING);
+
 }
 
 void CGLView::paintGL()
 {
+#if !ASSIMP_QT4_VIEWER
+	mGLContext_Current = true;
+#endif // ASSIMP_QT4_VIEWER
+
 	QTime time_paintbegin;
 
 	time_paintbegin = QTime::currentTime();
@@ -647,30 +742,36 @@ void CGLView::paintGL()
 	glMatrixMode(GL_MODELVIEW);
 	glLoadIdentity();
 	// Apply current camera transformations.
+#if ASSIMP_DOUBLE_PRECISION
+	glMultMatrixd((GLdouble*)&mHelper_Camera.Rotation_AroundCamera);
+	glTranslated(-mHelper_Camera.Translation_ToScene.x, -mHelper_Camera.Translation_ToScene.y, -mHelper_Camera.Translation_ToScene.z);
+	glMultMatrixd((GLdouble*)&mHelper_Camera.Rotation_Scene);
+#else
 	glMultMatrixf((GLfloat*)&mHelper_Camera.Rotation_AroundCamera);
 	glTranslatef(-mHelper_Camera.Translation_ToScene.x, -mHelper_Camera.Translation_ToScene.y, -mHelper_Camera.Translation_ToScene.z);
 	glMultMatrixf((GLfloat*)&mHelper_Camera.Rotation_Scene);
+#endif // ASSIMP_DOUBLE_PRECISION
+
 	// Coordinate system
-    if ( mLightingEnabled ) {
+	if (mScene_AxesEnabled == true)
-        glDisable( GL_LIGHTING );///TODO: display list
-    }
-    if (this->mAxesEnabled == true)
     {
         drawCoordSystem();
     }
 
 	glDisable(GL_COLOR_MATERIAL);
-	if(mLightingEnabled) glEnable(GL_LIGHTING);
-
 	// Scene
 	if(mScene != nullptr)
 	{
 		Draw_Node(mScene->mRootNode);
 		// Scene BBox
 		if(mScene_DrawBBox) Draw_BBox(mScene_BBox);
+
 	}
 
 	emit Paint_Finished((size_t)time_paintbegin.msecsTo(QTime::currentTime()), mHelper_Camera.Translation_ToScene.Length());
+#if !ASSIMP_QT4_VIEWER
+	mGLContext_Current = false;
+#endif // ASSIMP_QT4_VIEWER
 }
 
 /********************************************************************/
@@ -678,10 +779,12 @@ void CGLView::paintGL()
 /********************************************************************/
 
 CGLView::CGLView(QWidget *pParent)
+#if ASSIMP_QT4_VIEWER
 	: QGLWidget(QGLFormat(QGL::DoubleBuffer | QGL::DepthBuffer), pParent)
+#else
+	: QOpenGLWidget(pParent), mGLContext_Current(false)
+#endif // ASSIMP_QT4_VIEWER
 {
-	static_assert(sizeof(GLfloat) == sizeof(ai_real), "ai_real in Assimp must be equal to GLfloat/float.");///TODO: may be templates can be used.
-
 	// set initial view
 	mHelper_CameraDefault.SetDefault();
 	Camera_Set(0);
@@ -698,6 +801,10 @@ CGLView::~CGLView()
 
 void CGLView::FreeScene()
 {
+#if !ASSIMP_QT4_VIEWER
+	ConditionalContextControl_Begin;
+#endif // ASSIMP_QT4_VIEWER
+
 	// Set scene to null and after that \ref paintGL will not try to render it.
 	mScene = nullptr;
 	// Clean helper objects.
@@ -727,10 +834,18 @@ void CGLView::FreeScene()
 		mTexture_IDMap.clear();
 		delete [] id_tex;
 	}
+
+#if !ASSIMP_QT4_VIEWER
+	ConditionalContextControl_End;
+#endif // ASSIMP_QT4_VIEWER
 }
 
 void CGLView::SetScene(const aiScene *pScene, const QString& pScenePath)
 {
+#if !ASSIMP_QT4_VIEWER
+	ConditionalContextControl_Begin;
+#endif // ASSIMP_QT4_VIEWER
+
 	FreeScene();// Clear old data
 	// Why checking here, not at begin of function. Because old scene may not exist at know. So, need cleanup.
 	if(pScene == nullptr) return;
@@ -957,6 +1072,10 @@ void CGLView::SetScene(const aiScene *pScene, const QString& pScenePath)
 			emit SceneObject_Camera(mScene->mCameras[idx_cam]->mName.C_Str());
 		}
 	}// if(!mScene->HasCameras()) else
+
+#if !ASSIMP_QT4_VIEWER
+	ConditionalContextControl_End;
+#endif // ASSIMP_QT4_VIEWER
 }
 
 /********************************************************************/
@@ -965,39 +1084,65 @@ void CGLView::SetScene(const aiScene *pScene, const QString& pScenePath)
 
 void CGLView::Lighting_Enable()
 {
+#if !ASSIMP_QT4_VIEWER
+	ConditionalContextControl_Begin;
+#endif // ASSIMP_QT4_VIEWER
+
 	mLightingEnabled = true;
 	glEnable(GL_LIGHTING);
+
+#if !ASSIMP_QT4_VIEWER
+	ConditionalContextControl_End;
+#endif // ASSIMP_QT4_VIEWER
 }
 
 void CGLView::Lighting_Disable()
 {
+#if !ASSIMP_QT4_VIEWER
+	ConditionalContextControl_Begin;
+#endif // ASSIMP_QT4_VIEWER
+
 	glDisable(GL_LIGHTING);
 	mLightingEnabled = false;
+
+#if !ASSIMP_QT4_VIEWER
+	ConditionalContextControl_End;
+#endif // ASSIMP_QT4_VIEWER
 }
 
 void CGLView::Lighting_EditSource(const size_t pLightNumber, const SLightParameters& pLightParameters)
 {
+#if !ASSIMP_QT4_VIEWER
+	ConditionalContextControl_Begin;
+#endif // ASSIMP_QT4_VIEWER
+
 const size_t light_num = GL_LIGHT0 + pLightNumber;
 
 GLfloat farr[4];
 
 	if(pLightNumber >= GL_MAX_LIGHTS) return;///TODO: return value;
 
-	glLightfv(light_num, GL_AMBIENT, &pLightParameters.Ambient.r);// Ambient color
+	// Ambient color
-	glLightfv(light_num, GL_DIFFUSE, &pLightParameters.Diffuse.r);// Diffuse color
+	farr[0] = pLightParameters.Ambient.r, farr[1] = pLightParameters.Ambient.g; farr[2] = pLightParameters.Ambient.b; farr[3] = pLightParameters.Ambient.a;
-	glLightfv(light_num, GL_SPECULAR, &pLightParameters.Specular.r);// Specular color
+	glLightfv(light_num, GL_AMBIENT, farr);
+	// Diffuse color
+	farr[0] = pLightParameters.Diffuse.r, farr[1] = pLightParameters.Diffuse.g; farr[2] = pLightParameters.Diffuse.b; farr[3] = pLightParameters.Diffuse.a;
+	glLightfv(light_num, GL_DIFFUSE, farr);
+	// Specular color
+	farr[0] = pLightParameters.Specular.r, farr[1] = pLightParameters.Specular.g; farr[2] = pLightParameters.Specular.b; farr[3] = pLightParameters.Specular.a;
+	glLightfv(light_num, GL_SPECULAR, farr);
 	// Other parameters
 	switch(pLightParameters.Type)
 	{
 		case aiLightSource_DIRECTIONAL:
 			// Direction
-			farr[0] = pLightParameters.For.Directional.Direction.x, farr[2] = pLightParameters.For.Directional.Direction.y;
+			farr[0] = pLightParameters.For.Directional.Direction.x, farr[1] = pLightParameters.For.Directional.Direction.y;
 			farr[2] = pLightParameters.For.Directional.Direction.z; farr[3] = 0;
 			glLightfv(light_num, GL_POSITION, farr);
 			break;
 		case aiLightSource_POINT:
 			// Position
-			farr[0] = pLightParameters.For.Point.Position.x, farr[2] = pLightParameters.For.Point.Position.y;
+			farr[0] = pLightParameters.For.Point.Position.x, farr[1] = pLightParameters.For.Point.Position.y;
 			farr[2] = pLightParameters.For.Point.Position.z; farr[3] = 1;
 			glLightfv(light_num, GL_POSITION, farr);
 			// Attenuation
@@ -1008,20 +1153,20 @@ GLfloat farr[4];
 			break;
 		case aiLightSource_SPOT:
 			// Position
-			farr[0] = pLightParameters.For.Spot.Position.x, farr[2] = pLightParameters.For.Spot.Position.y, farr[2] = pLightParameters.For.Spot.Position.z; farr[3] = 1;
+			farr[0] = pLightParameters.For.Spot.Position.x, farr[1] = pLightParameters.For.Spot.Position.y, farr[2] = pLightParameters.For.Spot.Position.z; farr[3] = 1;
 			glLightfv(light_num, GL_POSITION, farr);
 			// Attenuation
 			glLightf(light_num, GL_CONSTANT_ATTENUATION, pLightParameters.For.Spot.Attenuation_Constant);
 			glLightf(light_num, GL_LINEAR_ATTENUATION, pLightParameters.For.Spot.Attenuation_Linear);
 			glLightf(light_num, GL_QUADRATIC_ATTENUATION, pLightParameters.For.Spot.Attenuation_Quadratic);
 			// Spot specific
-			farr[0] = pLightParameters.For.Spot.Direction.x, farr[2] = pLightParameters.For.Spot.Direction.y, farr[2] = pLightParameters.For.Spot.Direction.z; farr[3] = 0;
+			farr[0] = pLightParameters.For.Spot.Direction.x, farr[1] = pLightParameters.For.Spot.Direction.y, farr[2] = pLightParameters.For.Spot.Direction.z; farr[3] = 0;
 			glLightfv(light_num, GL_SPOT_DIRECTION, farr);
 			glLightf(light_num, GL_SPOT_CUTOFF, pLightParameters.For.Spot.CutOff);
 			break;
 		default:// For unknown light source types use point source.
 			// Position
-			farr[0] = pLightParameters.For.Point.Position.x, farr[2] = pLightParameters.For.Point.Position.y;
+			farr[0] = pLightParameters.For.Point.Position.x, farr[1] = pLightParameters.For.Point.Position.y;
 			farr[2] = pLightParameters.For.Point.Position.z; farr[3] = 1;
 			glLightfv(light_num, GL_POSITION, farr);
 			// Attenuation
@@ -1031,20 +1176,40 @@ GLfloat farr[4];
 			glLightf(light_num, GL_SPOT_CUTOFF, 180.0);
 			break;
 	}// switch(pLightParameters.Type)
+
+#if !ASSIMP_QT4_VIEWER
+	ConditionalContextControl_End;
+#endif // ASSIMP_QT4_VIEWER
 }
 
 void CGLView::Lighting_EnableSource(const size_t pLightNumber)
 {
+#if !ASSIMP_QT4_VIEWER
+	ConditionalContextControl_Begin;
+#endif // ASSIMP_QT4_VIEWER
+
 	if(pLightNumber >= GL_MAX_LIGHTS) return;///TODO: return value;
 
 	glEnable(GL_LIGHT0 + pLightNumber);
+
+#if !ASSIMP_QT4_VIEWER
+	ConditionalContextControl_End;
+#endif // ASSIMP_QT4_VIEWER
 }
 
 void CGLView::Lighting_DisableSource(const size_t pLightNumber)
 {
+#if !ASSIMP_QT4_VIEWER
+	ConditionalContextControl_Begin;
+#endif // ASSIMP_QT4_VIEWER
+
 	if(pLightNumber >= GL_MAX_LIGHTS) return;///TODO: return value;
 
 	glDisable(GL_LIGHT0 + pLightNumber);
+
+#if !ASSIMP_QT4_VIEWER
+	ConditionalContextControl_End;
+#endif // ASSIMP_QT4_VIEWER
 }
 
 /********************************************************************/
@@ -1096,23 +1261,29 @@ void CGLView::Camera_Set(const size_t pCameraNumber)
 	gluLookAt(hcam.Position.x, hcam.Position.y, hcam.Position.z, hcam.Target.x, hcam.Target.y, hcam.Target.z, up.x, up.y, up.z);
 }
 
-void CGLView::Camera_RotateScene(const GLfloat pAngle_X, const GLfloat pAngle_Y, const GLfloat pAngle_Z)
+void CGLView::Camera_RotateScene(const GLfloat pAngle_X, const GLfloat pAngle_Y, const GLfloat pAngle_Z, const aiMatrix4x4* pMatrix_Rotation_Initial)
 {
 auto deg2rad = [](const GLfloat pDegree) -> GLfloat { return pDegree * M_PI / 180.0; };
 
 	aiMatrix4x4 mat_rot;
 
 	mat_rot.FromEulerAnglesXYZ(deg2rad(pAngle_X), deg2rad(pAngle_Y), deg2rad(pAngle_Z));
+	if(pMatrix_Rotation_Initial != nullptr)
+		mHelper_Camera.Rotation_Scene = *pMatrix_Rotation_Initial * mat_rot;
+	else
 		mHelper_Camera.Rotation_Scene *= mat_rot;
 }
 
-void CGLView::Camera_Rotate(const GLfloat pAngle_X, const GLfloat pAngle_Y, const GLfloat pAngle_Z)
+void CGLView::Camera_Rotate(const GLfloat pAngle_X, const GLfloat pAngle_Y, const GLfloat pAngle_Z, const aiMatrix4x4* pMatrix_Rotation_Initial)
 {
 auto deg2rad = [](const GLfloat pDegree) -> GLfloat { return pDegree * M_PI / 180.0; };
 
 	aiMatrix4x4 mat_rot;
 
 	mat_rot.FromEulerAnglesXYZ(deg2rad(pAngle_X), deg2rad(pAngle_Y), deg2rad(pAngle_Z));
+	if(pMatrix_Rotation_Initial != nullptr)
+		mHelper_Camera.Rotation_AroundCamera = *pMatrix_Rotation_Initial * mat_rot;
+	else
 		mHelper_Camera.Rotation_AroundCamera *= mat_rot;
 }
 
@@ -1123,3 +1294,10 @@ aiVector3D vect_tr(pTranslate_X, pTranslate_Y, pTranslate_Z);
 	vect_tr *= mHelper_Camera.Rotation_AroundCamera;
 	mHelper_Camera.Translation_ToScene += vect_tr;
 }
+
+void CGLView::Camera_Matrix(aiMatrix4x4& pRotation_Camera, aiMatrix4x4& pRotation_Scene, aiVector3D& pTranslation_Camera)
+{
+	pRotation_Camera = mHelper_Camera.Rotation_AroundCamera;
+	pRotation_Scene = mHelper_Camera.Rotation_Scene;
+	pTranslation_Camera = mHelper_Camera.Translation_ToScene;
+}

tools/assimp_qt_viewer/glview.hpp

@@ -6,14 +6,24 @@
 #pragma once
 
 // Header files, Qt.
-#include <QtOpenGL>
+#include <QMap>
+#if ASSIMP_QT4_VIEWER
+#	include <QtOpenGL>
+#else
+#	include <QOpenGLWidget>
+#	include <QOpenGLFunctions>
+#endif // ASSIMP_QT4_VIEWER
 
 // Header files Assimp
 #include <assimp/scene.h>
 
 /// \class CGLView
 /// Class which hold and render scene.
+#if ASSIMP_QT4_VIEWER
 class CGLView : public QGLWidget
+#else
+class CGLView : public QOpenGLWidget, protected QOpenGLFunctions
+#endif // ASSIMP_QT4_VIEWER
 {
 	Q_OBJECT
 
@@ -75,9 +85,7 @@ private:
 	};
 
 public:
-    bool mAxesEnabled = true;
+
-	// Textures
-    bool mReloadTexturesEnabled = false; // If true then textures will reload when the window is activated.
 	/// \enum ELightType
 	/// Type of light source.
 	enum class ELightType { Directional, Point, Spot };
@@ -141,11 +149,16 @@ public:
 
 private:
 
+#if !ASSIMP_QT4_VIEWER
+	// Qt5 widget has another behavior, so you must to know that you already made context are current. Yes, its a dirty hack. Better decision are welcome.
+	bool mGLContext_Current;///< Widget's GL-context made current.
+#endif // ASSIMP_QT4_VIEWER
 	// Scene
 	const aiScene* mScene = nullptr;///< Copy of pointer to scene (\ref aiScene).
 	SBBox mScene_BBox;///< Bounding box of scene.
 	aiVector3D mScene_Center;///< Coordinates of center of the scene.
 	bool mScene_DrawBBox = false;///< Flag which control drawing scene BBox.
+	bool mScene_AxesEnabled = true;///< Flag which control drawing axes of the coordinate system.
 	// Meshes
 	size_t mHelper_Mesh_Quantity = 0;///< Quantity of meshes in scene.
 	SHelper_Mesh** mHelper_Mesh = nullptr;///< Array of pointers to helper objects for drawing mesh. Sequence of meshes are equivalent to \ref aiScene::mMeshes.
@@ -254,7 +267,11 @@ private:
 	/********************************************************************/
 
 protected:
+
+	/// \fn void drawCoordSystem()
+	/// Draw axes of the coordinate system.
     void drawCoordSystem();
+
 	/// \fn void initializeGL() override
 	/// Override function to initialise OpenGL.
 	void initializeGL() override;
@@ -307,11 +324,10 @@ public:
 	/// \param [in] pEnable - if true then enable textures, false - disable textures.
 	void Enable_Textures(const bool pEnable);
 
-	void Enable_Axes(const bool pEnable);
+	/// \fn void Enable_Axes(const bool pEnable)
-	/// \fn void Enable_Textures(const bool pEnable)
+	/// Control axes drawing.
-	/// Control textures drawing.
+	/// \param [in] pEnable - if true then enable axes, false - disable axes.
-	/// \param [in] pEnable - if true then enable textures, false - disable textures.
+	void Enable_Axes(const bool pEnable) { this->mScene_AxesEnabled = pEnable; }
-	void Enable_Reload_Textures(const bool pEnable);
 
 	/********************************************************************/
 	/******************** Lighting control functions ********************/
@@ -350,19 +366,23 @@ public:
 	/// \param [in] pCamera_Index - index of the camera (\ref aiScene::mCameras).
 	void Camera_Set(const size_t pCameraNumber);
 
-	/// \fn void Camera_RotateScene(const GLfloat pAngle_X, const GLfloat pAngle_Y, const GLfloat pAngle_Z)
+	/// \fn void Camera_RotateScene(const GLfloat pAngle_X, const GLfloat pAngle_Y, const GLfloat pAngle_Z, const aiMatrix4x4* pMatrix_Rotation_Initial)
 	/// Rotate scene around axisees.
 	/// \param [in] pAngle_X - specifies the angle of rotation around axis oX, in degrees.
 	/// \param [in] pAngle_Y - specifies the angle of rotation around axis oY, in degrees.
 	/// \param [in] pAngle_Z - specifies the angle of rotation around axis oZ, in degrees.
-	void Camera_RotateScene(const GLfloat pAngle_X, const GLfloat pAngle_Y, const GLfloat pAngle_Z);
+	/// \param [in] pMatrix_Rotation_Initial - matrix from which calculates new transformation matrix. If not set (equal to nullptr) then current transformation matrix
+	/// will be used.
+	void Camera_RotateScene(const GLfloat pAngle_X, const GLfloat pAngle_Y, const GLfloat pAngle_Z, const aiMatrix4x4* pMatrix_Rotation_Initial = nullptr);
 
-	/// \fn void Camera_Rotate(const GLfloat pAngle_X, const GLfloat pAngle_Y, const GLfloat pAngle_Z)
+	/// \fn void Camera_Rotate(const GLfloat pAngle_X, const GLfloat pAngle_Y, const GLfloat pAngle_Z, const aiMatrix4x4* pMatrix_Rotation_Initial = nullptr)
 	/// Rotate camera around axisees.
 	/// \param [in] pAngle_X - specifies the angle of rotation around axis oX, in degrees.
 	/// \param [in] pAngle_Y - specifies the angle of rotation around axis oY, in degrees.
 	/// \param [in] pAngle_Z - specifies the angle of rotation around axis oZ, in degrees.
-	void Camera_Rotate(const GLfloat pAngle_X, const GLfloat pAngle_Y, const GLfloat pAngle_Z);
+	/// \param [in] pMatrix_Rotation_Initial - matrix from which calculates new transformation matrix. If not set (equal to nullptr) then current transformation matrix
+	/// will be used.
+	void Camera_Rotate(const GLfloat pAngle_X, const GLfloat pAngle_Y, const GLfloat pAngle_Z, const aiMatrix4x4* pMatrix_Rotation_Initial = nullptr);
 
 	/// \fn void Camera_Translate(const size_t pTranslate_X, const size_t pTranslate_Y, const size_t pTranslate_Z)
 	/// Translate camera along axises. In local coordinates.
@@ -371,6 +391,13 @@ public:
 	/// \param [in] pTranslate_Z - specifies the Z coordinate of translation vector.
 	void Camera_Translate(const GLfloat pTranslate_X, const GLfloat pTranslate_Y, const GLfloat pTranslate_Z);
 
+	/// \fn void Camera_Matrix(aiMatrix4x4& pRotation_Camera, aiMatrix4x4& pRotation_Scene, aiVector3D& pTranslation_Camera)
+	/// Return data about camera position in world.
+	/// \param [out] pRotation_Camera - rotation matrix which set rotation angles of the scene around camera.
+	/// \param [out] pRotation_Scene - rotation matrix which set rotation angles of the scene around own center.
+	/// \param [out] pTranslation_Camera - translation vector from camera to the scene.
+	void Camera_Matrix(aiMatrix4x4& pRotation_Camera, aiMatrix4x4& pRotation_Scene, aiVector3D& pTranslation_Camera);
+
 signals:
 
 	/// \fn void Paint_Finished(const size_t pPaintTime, const GLfloat pDistance)

tools/assimp_qt_viewer/mainwindow.cpp

@@ -48,7 +48,7 @@ QTime time_begin = QTime::currentTime();
 		ui->cbxLighting->setChecked(true);	mGLView->Lighting_Enable();
 		ui->cbxBBox->setChecked(false);		mGLView->Enable_SceneBBox(false);
 		ui->cbxTextures->setChecked(true);	mGLView->Enable_Textures(true);
-		ui->cbxReloadTextures->setChecked(true);	mGLView->Enable_Reload_Textures(false);
+
 		//
 		// Fill info labels
 		//
@@ -84,7 +84,11 @@ QTime time_begin = QTime::currentTime();
 		mGLView->Camera_Set(0);
 		// Scene is loaded, do first rendering.
 		LogInfo("Scene is ready for rendering.");
+#if ASSIMP_QT4_VIEWER
 		mGLView->updateGL();
+#else
+		mGLView->update();
+#endif // ASSIMP_QT4_VIEWER
 	}
 	else
 	{
@@ -128,40 +132,74 @@ void MainWindow::LogError(const QString& pMessage)
 
 void MainWindow::mousePressEvent(QMouseEvent* pEvent)
 {
+const QPoint ms_pt = pEvent->pos();
+
+__unused aiVector3D temp_v3;
+
+	// Check if GLView is pointed.
+	if(childAt(ms_pt) == mGLView)
+	{
+		if(!mMouse_Transformation.Position_Pressed_Valid)
+		{
+			mMouse_Transformation.Position_Pressed_Valid = true;// set flag
+			// Store current transformation matrices.
+			mGLView->Camera_Matrix(mMouse_Transformation.Rotation_AroundCamera, mMouse_Transformation.Rotation_Scene, temp_v3);
+		}
+
 		if(pEvent->button() & Qt::LeftButton)
-		mPosition_Pressed_LMB = pEvent->pos();
+			mMouse_Transformation.Position_Pressed_LMB = ms_pt;
 		else if(pEvent->button() & Qt::RightButton)
-		mPosition_Pressed_RMB = pEvent->pos();
+			mMouse_Transformation.Position_Pressed_RMB = ms_pt;
+	}
+	else
+	{
+		mMouse_Transformation.Position_Pressed_Valid = false;
+	}
+}
+
+void MainWindow::mouseReleaseEvent(QMouseEvent *pEvent)
+{
+	if(pEvent->buttons() == 0) mMouse_Transformation.Position_Pressed_Valid = false;
+
 }
 
 void MainWindow::mouseMoveEvent(QMouseEvent* pEvent)
 {
+	if(mMouse_Transformation.Position_Pressed_Valid)
+	{
 		if(pEvent->buttons() & Qt::LeftButton)
 		{
-		GLfloat dx = 180 * GLfloat(pEvent->x() - mPosition_Pressed_LMB.x()) / mGLView->width();
+			GLfloat dx = 180 * GLfloat(pEvent->x() - mMouse_Transformation.Position_Pressed_LMB.x()) / mGLView->width();
-		GLfloat dy = 180 * GLfloat(pEvent->y() - mPosition_Pressed_LMB.y()) / mGLView->height();
+			GLfloat dy = 180 * GLfloat(pEvent->y() - mMouse_Transformation.Position_Pressed_LMB.y()) / mGLView->height();
 
 			if(pEvent->modifiers() & Qt::ShiftModifier)
-			mGLView->Camera_RotateScene(dy, 0, dx);// Rotate around oX and oZ axises.
+				mGLView->Camera_RotateScene(dy, 0, dx, &mMouse_Transformation.Rotation_Scene);// Rotate around oX and oZ axises.
 			else
-			mGLView->Camera_RotateScene(dy, dx, 0);// Rotate around oX and oY axises.
+				mGLView->Camera_RotateScene(dy, dx, 0, &mMouse_Transformation.Rotation_Scene);// Rotate around oX and oY axises.
 
+	#if ASSIMP_QT4_VIEWER
 			mGLView->updateGL();
-		mPosition_Pressed_LMB = pEvent->pos();
+	#else
+			mGLView->update();
+	#endif // ASSIMP_QT4_VIEWER
 		}
 
 		if(pEvent->buttons() & Qt::RightButton)
 		{
-		GLfloat dx = 180 * GLfloat(pEvent->x() - mPosition_Pressed_RMB.x()) / mGLView->width();
+			GLfloat dx = 180 * GLfloat(pEvent->x() - mMouse_Transformation.Position_Pressed_RMB.x()) / mGLView->width();
-		GLfloat dy = 180 * GLfloat(pEvent->y() - mPosition_Pressed_RMB.y()) / mGLView->height();
+			GLfloat dy = 180 * GLfloat(pEvent->y() - mMouse_Transformation.Position_Pressed_RMB.y()) / mGLView->height();
 
 			if(pEvent->modifiers() & Qt::ShiftModifier)
-			mGLView->Camera_Rotate(dy, 0, dx);// Rotate around oX and oZ axises.
+				mGLView->Camera_Rotate(dy, 0, dx, &mMouse_Transformation.Rotation_AroundCamera);// Rotate around oX and oZ axises.
 			else
-			mGLView->Camera_Rotate(dy, dx, 0);// Rotate around oX and oY axises.
+				mGLView->Camera_Rotate(dy, dx, 0, &mMouse_Transformation.Rotation_AroundCamera);// Rotate around oX and oY axises.
 
+	#if ASSIMP_QT4_VIEWER
 			mGLView->updateGL();
-		mPosition_Pressed_RMB = pEvent->pos();
+	#else
+			mGLView->update();
+	#endif // ASSIMP_QT4_VIEWER
+		}
 	}
 }
 
@@ -189,19 +227,16 @@ GLfloat step;
 	else if(pEvent->key() == Qt::Key_Down)
 		mGLView->Camera_Translate(0, 0, step);
 
+#if ASSIMP_QT4_VIEWER
 	mGLView->updateGL();
+#else
+	mGLView->update();
+#endif // ASSIMP_QT4_VIEWER
 }
 
 /********************************************************************/
 /********************** Constructor/Destructor **********************/
 /********************************************************************/
-bool MainWindow::event(QEvent *e)
-{
-    if (e->type() == QEvent::WindowActivate && this->mGLView->mReloadTexturesEnabled == true) {
-	    qInfo() << "Window Activated";
-    }
-    return QWidget::event(e);
-}
 
 MainWindow::MainWindow(QWidget *parent)
 	: QMainWindow(parent), ui(new Ui::MainWindow),
@@ -209,6 +244,9 @@ MainWindow::MainWindow(QWidget *parent)
 {
 using namespace Assimp;
 
+	// other variables
+	mMouse_Transformation.Position_Pressed_Valid = false;
+
 	ui->setupUi(this);
 	// Create OpenGL widget
 	mGLView = new CGLView(this);
@@ -281,7 +319,6 @@ QString filename, filter;
 	if(!filename.isEmpty()) ImportFile(filename);
 }
 
-
 void MainWindow::on_butExport_clicked()
 {
 using namespace Assimp;
@@ -301,7 +338,7 @@ QMap<QString, const aiExportFormatDesc*> exportersMap;
 		return;
 	}
 
-	for (int i = 0; i < exporter.GetExportFormatCount(); ++i)
+	for (size_t i = 0; i < exporter.GetExportFormatCount(); ++i)
 	{
 		const aiExportFormatDesc* desc = exporter.GetExportFormatDescription(i);
 		exportersList.push_back(desc->id + QString(": ") + desc->description);
@@ -345,7 +382,11 @@ void MainWindow::on_cbxLighting_clicked(bool pChecked)
 	else
 		mGLView->Lighting_Disable();
 
+#if ASSIMP_QT4_VIEWER
 	mGLView->updateGL();
+#else
+	mGLView->update();
+#endif // ASSIMP_QT4_VIEWER
 }
 
 void MainWindow::on_lstLight_itemSelectionChanged()
@@ -357,35 +398,49 @@ bool selected = ui->lstLight->isItemSelected(ui->lstLight->currentItem());
 	else
 		mGLView->Lighting_DisableSource(ui->lstLight->currentRow());
 
+#if ASSIMP_QT4_VIEWER
 	mGLView->updateGL();
+#else
+	mGLView->update();
+#endif // ASSIMP_QT4_VIEWER
 }
 
 void MainWindow::on_lstCamera_clicked( const QModelIndex &)
 {
 	mGLView->Camera_Set(ui->lstLight->currentRow());
+#if ASSIMP_QT4_VIEWER
 	mGLView->updateGL();
+#else
+	mGLView->update();
+#endif // ASSIMP_QT4_VIEWER
 }
 
 void MainWindow::on_cbxBBox_clicked(bool checked)
 {
 	mGLView->Enable_SceneBBox(checked);
+#if ASSIMP_QT4_VIEWER
 	mGLView->updateGL();
+#else
+	mGLView->update();
+#endif // ASSIMP_QT4_VIEWER
 }
 
 void MainWindow::on_cbxDrawAxes_clicked(bool checked)
 {
 	mGLView->Enable_Axes(checked);
+#if ASSIMP_QT4_VIEWER
 	mGLView->updateGL();
-}
+#else
-
+	mGLView->update();
-void MainWindow::on_cbxReloadTextures_clicked(bool checked)
+#endif // ASSIMP_QT4_VIEWER
-{
-	mGLView->Enable_Reload_Textures(checked);
-	mGLView->updateGL();
 }
 
 void MainWindow::on_cbxTextures_clicked(bool checked)
 {
 	mGLView->Enable_Textures(checked);
+#if ASSIMP_QT4_VIEWER
 	mGLView->updateGL();
+#else
+	mGLView->update();
+#endif // ASSIMP_QT4_VIEWER
 }

tools/assimp_qt_viewer/mainwindow.hpp

@@ -6,7 +6,11 @@
 #pragma once
 
 // Header files, Qt.
-#include <QtWidgets>
+#if ASSIMP_QT4_VIEWER
+#	include <QMainWindow>
+#else
+#	include <QtWidgets>
+#endif
 
 // Header files, project.
 #include "glview.hpp"
@@ -36,8 +40,17 @@ private:
 	CLoggerView* mLoggerView;///< Pointer to logging object.
 	Assimp::Importer mImporter;///< Assimp importer.
 	const aiScene* mScene;///< Pointer to loaded scene (\ref aiScene).
-	QPoint mPosition_Pressed_LMB;///< Position where was pressed left mouse button.
+
-	QPoint mPosition_Pressed_RMB;///< Position where was pressed right mouse button.
+	/// \struct SMouse_Transformation
+	/// Holds data about transformation of the scene/camera when mouse us used.
+	struct SMouse_Transformation
+	{
+		bool Position_Pressed_Valid;///< Mouse button pressed on GLView.
+		QPoint Position_Pressed_LMB;///< Position where was pressed left mouse button.
+		QPoint Position_Pressed_RMB;///< Position where was pressed right mouse button.
+		aiMatrix4x4 Rotation_AroundCamera;///< Rotation matrix which set rotation angles of the scene around camera.
+		aiMatrix4x4 Rotation_Scene;///< Rotation matrix which set rotation angles of the scene around own center.
+	} mMouse_Transformation;
 
 	/**********************************/
 	/************ Functions ***********/
@@ -80,6 +93,11 @@ protected:
 	/// \param [in] pEvent - pointer to event data.
 	void mousePressEvent(QMouseEvent* pEvent) override;
 
+	/// \fn void mouseReleaseEvent(QMouseEvent *pEvent) override
+	/// Override function which handles mouse event "button released".
+	/// \param [in] pEvent - pointer to event data.
+	void mouseReleaseEvent(QMouseEvent *pEvent) override;
+
 	/// \fn void mouseMoveEvent(QMouseEvent* pEvent) override
 	/// Override function which handles mouse event "move".
 	/// \param [in] pEvent - pointer to event data.
@@ -90,7 +108,6 @@ protected:
 	/// \param [in] pEvent - pointer to event data.
 	void keyPressEvent(QKeyEvent* pEvent) override;
 
-	bool event(QEvent*);
 public:
 
 	/********************************************************************/
@@ -134,5 +151,4 @@ private slots:
 	void on_cbxBBox_clicked(bool checked);
 	void on_cbxTextures_clicked(bool checked);
 	void on_cbxDrawAxes_clicked(bool checked);
-	void on_cbxReloadTextures_clicked(bool checked);
 };

tools/assimp_qt_viewer/mainwindow.ui

@@ -302,6 +302,9 @@
                <property name="text">
                 <string/>
                </property>
+               <property name="alignment">
+                <set>Qt::AlignCenter</set>
+               </property>
               </widget>
              </item>
              <item row="5" column="1">
@@ -312,6 +315,9 @@
                <property name="text">
                 <string/>
                </property>
+               <property name="alignment">
+                <set>Qt::AlignCenter</set>
+               </property>
               </widget>
              </item>
              <item row="6" column="1">
@@ -325,6 +331,9 @@
                <property name="text">
                 <string/>
                </property>
+               <property name="alignment">
+                <set>Qt::AlignCenter</set>
+               </property>
               </widget>
              </item>
              <item row="7" column="1">
@@ -335,6 +344,9 @@
                <property name="text">
                 <string/>
                </property>
+               <property name="alignment">
+                <set>Qt::AlignCenter</set>
+               </property>
               </widget>
              </item>
              <item row="8" column="0">
@@ -349,6 +361,9 @@
                <property name="text">
                 <string/>
                </property>
+               <property name="alignment">
+                <set>Qt::AlignCenter</set>
+               </property>
               </widget>
              </item>
             </layout>
@@ -511,13 +526,6 @@
             </property>
            </widget>
           </item>
-          <item row="4" column="0">
-           <widget class="QCheckBox" name="cbxReloadTextures">
-            <property name="text">
-             <string>Live Reload Textures</string>
-            </property>
-           </widget>
-          </item>
          </layout>
         </widget>
        </widget>