fixed wireframe bug

QtMeshViewer/Source/GeometryEngine.cpp

@@ -195,7 +195,12 @@ void GeometryEngine::drawGeometry(QOpenGLShaderProgram *program, bool wireframe)
 		program->setUniformValue("b_transparent", tmp_transparent);
 
 		// Draw cube geometry using indices from VBO 1
-		glDrawElements(wireframe? GL_LINES : GL_TRIANGLES, it.size, GL_UNSIGNED_INT, (void*)(it.offset * sizeof(GLuint)));
+		if(wireframe)
+			glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+
+		glDrawElements(GL_TRIANGLES, it.size, GL_UNSIGNED_INT, (void*)(it.offset * sizeof(GLuint)));
+		
+		glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
 	}
 }