change background when the light is on

QtMeshViewer/Header/OglViewerWidget.h

@@ -44,6 +44,8 @@ private:
 		float ambientCoefficient = 0.005f;
 	} m_light;
 
+	QVector4D m_backgroundColor = {0.5f, 0.8f, 1.0f, 1.0f};
+
 	QOpenGLShaderProgram m_program;
 	GeometryEngine *m_dataEngine;
 

QtMeshViewer/Source/MainWindow.cpp

@@ -188,6 +188,7 @@ void MainWindow::setFileInfo(QString name, QVector<Material>* materials, int ver
 
 	int count(0);
 	//TODO: mark not opened textures
+	//TODO: add more information
 	for (auto& it : *materials)
 	{
 		m_fileInfo += "Material ";

QtMeshViewer/Source/OglViewerWidget.cpp

@@ -184,7 +184,7 @@ void OglViewerWidget::initializeGL()
 {
 	initializeOpenGLFunctions();
 
-	glClearColor(0.5000f, 0.8000f, 1.0000f, 0.0000f);
+	//glClearColor(0.5000f, 0.8000f, 1.0000f, 0.0000f);
 
 	initShaders();
 
@@ -222,6 +222,12 @@ void OglViewerWidget::paintGL()
 	// Clear color and depth buffer
 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
+	if (m_backgroundColor[3] == 1.0)
+	{
+		glClearColor(m_backgroundColor[0], m_backgroundColor[1], m_backgroundColor[2], 0.0000f);
+		m_backgroundColor[3] = 0.0;
+	}
+
 	// Calculate model view transformation
 	QMatrix4x4 view;
 	view.translate(m_translation);
@@ -330,13 +336,13 @@ void OglViewerWidget::toggleLight()
 
 	if (m_lightOn)
 	{
-		glClearColor(m_light.intensities.x() / 100, m_light.intensities.y() / 100, m_light.intensities.z() / 100, 0.0000f);
+		m_backgroundColor = { m_light.intensities.x() / 100, m_light.intensities.y() / 100, m_light.intensities.z() / 100, 1.0 };
 
 		updateLightPosition();
 	}
 	else
 	{
-		glClearColor(0.5000f, 0.8000f, 1.0000f, 0.0000f);
+		m_backgroundColor = { 0.5f, 0.8f, 1.0f, 1.0 };
 	}
 
 	update();