[vtk-developers] Use GLFW as VTK window manager ?

[Elvis Stansvik]

Den 11 feb. 2017 5:39 em skrev "Utkarsh Ayachit" <
utkarsh.ayachit at kitware.com>:
>
> Abel,
>
> You may want to look into using vtkGenericOpenGLRenderWindow. See the
newly added QVTKOpenGLWidget [1] in VTK/master as an example. There's too
we're letting QOpenGLWidget create the OpenGL context and VTK manage the
rendering.

Sorry for hijacking with a question of my own: I hadn't heard of this new
QVTKOpenGLWidget, do you know if it'll be part of 7.2.0?

Elvis

>
> Utkarsh
>
> [1]
https://gitlab.kitware.com/vtk/vtk/blob/master/GUISupport/Qt/QVTKOpenGLWidget.cxx
>
>
> On Fri, Feb 10, 2017 at 5:29 PM, huabel <hu.ds.abel at icloud.com> wrote:
>>
>> Hi,
>> I am try to use GLFW as window manager, get this result:
>>
>>
>>
>> It create two independent window, how can I let the vtk renderwindow
show in glfw window?
>>
>> The code demo1.cpp:
>>
>> #include "vtkConeSource.h"
>> #include "vtkPolyDataMapper.h"
>> #include "vtkRenderWindow.h"
>> #include "vtkRenderWindowInteractor.h"
>> #include "vtkCamera.h"
>> #include "vtkActor.h"
>> #include "vtkRenderer.h"
>> #include "vtkCommand.h"
>> #include "vtkBoxWidget.h"
>> #include "vtkTransform.h"
>> #include "vtkInteractorStyleTrackballCamera.h"
>> #include <GLFW/glfw3.h>
>>
>> #define SCREEN_WIDTH 800
>> #define SCREEN_HEIGHT 600
>>
>> class vtkMyCallback : public vtkCommand
>> {
>> public:
>> static vtkMyCallback *New()
>>   { return new vtkMyCallback; }
>> void Execute(vtkObject *caller, unsigned long, void*) VTK_OVERRIDE
>> {
>>     vtkTransform *t = vtkTransform::New();
>>     vtkBoxWidget *widget = reinterpret_cast<vtkBoxWidget*>(caller);
>>     widget->GetTransform(t);
>>     widget->GetProp3D()->SetUserTransform(t);
>>     t->Delete();
>> }
>> };
>>
>> static void error_cb(int error, const char* description) {
>> fprintf(stderr, "Error: %s\n", description);
>> }
>>
>> void drawScene(void) {
>> glClear(GL_COLOR_BUFFER_BIT);
>> vtkConeSource *cone = vtkConeSource::New();
>> cone->SetHeight( 3.0 );
>> cone->SetRadius( 1.0 );
>> cone->SetResolution( 10 );
>>
>> vtkPolyDataMapper *coneMapper = vtkPolyDataMapper::New();
>> coneMapper->SetInputConnection( cone->GetOutputPort() );
>>
>> vtkActor *coneActor = vtkActor::New();
>> coneActor->SetMapper( coneMapper );
>>
>> vtkRenderer *ren1= vtkRenderer::New();
>> ren1->AddActor( coneActor );
>> ren1->SetBackground( 0.1, 0.2, 0.4 );
>>
>> vtkRenderWindow *renWin = vtkRenderWindow::New();
>> renWin->AddRenderer( ren1 );
>> renWin->SetSize( 300, 300 );
>>
>> vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
>> iren->SetRenderWindow(renWin);
>>
>> vtkInteractorStyleTrackballCamera *style =
vtkInteractorStyleTrackballCamera::New();
>> iren->SetInteractorStyle(style);
>>
>> vtkBoxWidget *boxWidget = vtkBoxWidget::New();
>> boxWidget->SetInteractor(iren);
>> boxWidget->SetPlaceFactor(1.25);
>>
>> boxWidget->SetProp3D(coneActor);
>> boxWidget->PlaceWidget();
>> vtkMyCallback *callback = vtkMyCallback::New();
>> boxWidget->AddObserver(vtkCommand::InteractionEvent, callback);
>>
>> boxWidget->On();
>>
>> iren->Initialize();
>> iren->Start();
>>
>> cone->Delete();
>> coneMapper->Delete();
>> coneActor->Delete();
>> callback->Delete();
>> boxWidget->Delete();
>> ren1->Delete();
>> renWin->Delete();
>> iren->Delete();
>> style->Delete();
>> }
>>
>> void setup(void) {
>> glClearColor(0.2, 0.2, 0.2, 0.0);
>>
>> glShadeModel(GL_FLAT);
>> }
>>
>> void reshape(GLFWwindow* window) {
>> glViewport(0.0f, 0.0f, SCREEN_WIDTH, SCREEN_HEIGHT);
>> glMatrixMode(GL_PROJECTION);
>> glLoadIdentity();
>> glOrtho(0, SCREEN_WIDTH, 0, SCREEN_HEIGHT, 0, 1);
>> glMatrixMode(GL_MODELVIEW);
>> glLoadIdentity();
>> }
>>
>> static void key_cb(GLFWwindow* window, int key, int s, int action, int
mods) {
>> if (action != GLFW_PRESS) return;
>>
>> switch (key) {
>>   case GLFW_KEY_ESCAPE:
>>     glfwSetWindowShouldClose(window, 1);
>>     break;
>> }
>> }
>> int main()
>> {
>> GLFWwindow* window;
>>
>> glfwSetErrorCallback(error_cb);
>>
>> if (!glfwInit()) exit(EXIT_FAILURE);
>>
>> window = glfwCreateWindow(SCREEN_WIDTH, SCREEN_HEIGHT, "demo1", NULL,
NULL);
>> if (!window) {
>>   glfwTerminate();
>>   exit(EXIT_FAILURE);
>> }
>>
>> glfwMakeContextCurrent(window);
>> glfwSwapInterval(1);
>>
>> glfwSetKeyCallback(window, key_cb);
>>
>> setup();
>>
>> while (!glfwWindowShouldClose(window)) {
>>   reshape(window);
>>   drawScene();
>>   glfwSwapBuffers(window);
>>   glfwWaitEvents();
>> }
>>
>> glfwTerminate();
>> exit(EXIT_SUCCESS);
>> return 0;
>> }
>>
>> The CMakeLists.txt
>>
>> cmake_minimum_required(VERSION 3.4)
>>
>> project(examples)
>>
>> include_directories(${CMAKE_CURRENT_BINARY_DIR}
${CMAKE_CURRENT_SOURCE_DIR})
>>
>> find_package(VTK REQUIRED)
>> include(${VTK_USE_FILE})
>>
>> #set(glfw3_DIR "/opt/glfw/lib/cmake/glfw3")
>> find_package(glfw3 REQUIRED)
>> find_package(OpenGL REQUIRED)
>> find_package(GLEW REQUIRED)
>>
>> include_directories(${OPENGL_INCLUDE_DIR})
>> include_directories(${GLEW_INCLUDE_DIR})
>> include_directories(${GLFW_INCLUDE_DIR})
>>
>> if(CMAKE_HOST_SYSTEM MATCHES Linux)
>> message("---> ${CMAKE_HOST_SYSTEM}")
>> set(libs ${OPENGL_LIBRARIES} ${GLEW_LIBRARIES} glfw m)
>> endif()
>>
>> if(CMAKE_HOST_SYSTEM MATCHES Darwin)
>> message("---> ${CMAKE_HOST_SYSTEM}")
>> set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -framework OpenGL")
>> set(libs ${OPENGL_LIBRARIES} ${GLEW_LIBRARIES} glfw m)
>> endif()
>>
>> set(lib ${VTK_LIBRARIES} ${ITK_LIBRARIES})
>>
>> set(EXAMPLES_SRCS
>> demo1
>> )
>>
>> foreach(name ${EXAMPLES_SRCS})
>> add_executable(${name} ${name}.cpp)
>> target_link_libraries(${name} ${VTK_LIBRARIES} ${libs})
>> #target_link_libraries(${name} ${VTK_LIBRARIES})
>> endforeach()
>>
>>
>>
>> Thanks!
>> Abel
>>
>>
>>
>>
>>
>>
>>
>>
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>
>
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