I made sample code using the imGUI & VTK in visual studio 2019.
refference sites : https://github.com/trlsmax/imgui-vtk & https://github.com/ocornut/imgui
VTK version : 9.2(latest version)
I'm doing with VTK viewer in imGUI. But, I faced on the problems as below.
====== code
#pragma once
////#include <vtkAutoInit.h>
////
////#define vtkRederingCore_AUTOINIT 3(vtkRenderingOpenGL2, vtkInteractionStyle, vtkRenderingFreeType)
////#define vtkRenderingContext2D_AUTOINIT 1(vtkRenderingContextOpenGL2)
#include <vtkAutoInit.h>
#define vtkRenderingCore_AUTOINIT 3(vtkRenderingOpenGL2,vtkInteractionStyle, vtkRenderingFreeType)
#define vtkRenderingContext2D_AUTOINIT 1(vtkRenderingContextOpenGL2)
#include <vtkActor.h>
#include <vtkCylinderSource.h>
#include <vtkSmartPointer.h>
#include <vtkContourFilter.h>
#include <vtkMath.h>
#include <vtkNamedColors.h>
#include <vtkPointData.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkShortArray.h>
#include <vtkStructuredPoints.h>
static vtkSmartPointer<vtkActor> SetupDemoCylinder()
{
auto colors = vtkSmartPointer<vtkNamedColors>::New();
// Set the background color.
std::array<unsigned char, 4> bkg{ {26, 51, 102, 255} };
colors->SetColor("BkgColor", bkg.data());
// This creates a polygonal cylinder model with eight circumferential facets
// (i.e, in practice an octagonal prism).
auto cylinder = vtkSmartPointer<vtkCylinderSource>::New();
cylinder->SetResolution(8);
// The mapper is responsible for pushing the geometry into the graphics
// library. It may also do color mapping, if scalars or other attributes are
// defined.
auto cylinderMapper = vtkSmartPointer<vtkPolyDataMapper>::New();
cylinderMapper->SetInputConnection(cylinder->GetOutputPort());
// The actor is a grouping mechanism: besides the geometry (mapper), it
// also has a property, transformation matrix, and/or texture map.
// Here we set its color and rotate it around the X and Y axes.
auto cylinderActor = vtkSmartPointer<vtkActor>::New();
cylinderActor->SetMapper(cylinderMapper);
cylinderActor->GetProperty()->SetColor(colors->GetColor4d("Tomato").GetData());
cylinderActor->RotateX(30.0);
cylinderActor->RotateY(-45.0);
return cylinderActor;
}
main.cpp
auto actor = SetupDemoCylinder();
// Setup window
glfwSetErrorCallback(glfw_error_callback);
if (!glfwInit()) {
return 1;
}
// Use GL 3.2 (All Platforms)
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
// Decide GLSL version
#ifdef __APPLE__
// GLSL 150
const char* glsl_version = "#version 150";
#else
// GLSL 130
const char* glsl_version = "#version 130";
#endif
// Create window with graphics context
GLFWwindow* window = glfwCreateWindow(1280, 720, "Dear ImGui VTKViewer Example", NULL, NULL);
if (window == NULL) {
return 1;
}
glfwMakeContextCurrent(window);
glfwSwapInterval(1); // Enable vsync
// Initialize OpenGL loader
if (gl3wInit() != 0) {
fprintf(stderr, "Failed to initialize OpenGL loader!\n");
return 1;
}
// Setup Dear ImGui context
IMGUI_CHECKVERSION();
ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO(); (void)io;
io.ConfigFlags |= ImGuiConfigFlags_DockingEnable; // Enable Docking
io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable; // Enable Multi-Viewport / Platform Windows'
// Setup Dear ImGui style
ImGui::StyleColorsDark();
// Setup Platform/Renderer backends
ImGui_ImplGlfw_InitForOpenGL(window, true);
ImGui_ImplOpenGL3_Init(glsl_version);
// Initialize VtkViewer objects
VtkViewer vtkViewer1;
vtkViewer1.addActor(actor);
VtkViewer vtkViewer2;
vtkViewer2.addActor(actor);
vtkViewer2.getRenderer()->SetBackground(0, 0, 0); // Black background
// Our state
bool show_demo_window = true;
bool show_another_window = false;
bool vtk_2_open = true;
ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// Main loop while (!glfwWindowShouldClose(window)) {
// 4. Show a simple VtkViewer Instance (Always Open)
ImGui::SetNextWindowSize(ImVec2(360, 240), ImGuiCond_FirstUseEver);
ImGui::Begin("Vtk Viewer 1", nullptr, VtkViewer::NoScrollFlags());
vtkViewer1.render(); // default render size = ImGui::GetContentRegionAvail()
ImGui::End();
// 5. Show a more complex VtkViewer Instance (Closable, Widgets in Window)
ImGui::SetNextWindowSize(ImVec2(720, 480), ImGuiCond_FirstUseEver);
if (vtk_2_open) {
ImGui::Begin("Vtk Viewer 2", &vtk_2_open, VtkViewer::NoScrollFlags());
// Other widgets can be placed in the same window as the VTKViewer
// However, since the VTKViewer is rendered to size ImGui::GetContentRegionAvail(),
// it is best to put all widgets first (i.e., render the VTKViewer last).
// If you want the VTKViewer to be at the top of a window, you can manually calculate
// and define its size, accounting for the space taken up by other widgets
auto renderer = vtkViewer2.getRenderer();
if (ImGui::Button("VTK Background: Black")) {
renderer->SetBackground(0, 0, 0);
}
ImGui::SameLine();
if (ImGui::Button("VTK Background: Red")) {
renderer->SetBackground(1, 0, 0);
}
ImGui::SameLine();
if (ImGui::Button("VTK Background: Green")) {
renderer->SetBackground(0, 1, 0);
}
ImGui::SameLine();
if (ImGui::Button("VTK Background: Blue")) {
renderer->SetBackground(0, 0, 1);
}
static float vtk2BkgAlpha = 0.2f;
ImGui::SliderFloat("Background Alpha", &vtk2BkgAlpha, 0.0f, 1.0f);
renderer->SetBackgroundAlpha(vtk2BkgAlpha);
vtkViewer2.render();
ImGui::End();
}
ImGui::Render();
int display_w, display_h;
glfwGetFramebufferSize(window, &display_w, &display_h);
glViewport(0, 0, display_w, display_h);
glClear(GL_COLOR_BUFFER_BIT);
ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
// Update and Render additional Platform Windows
if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
{
GLFWwindow* backup_current_context = glfwGetCurrentContext();
ImGui::UpdatePlatformWindows();
ImGui::RenderPlatformWindowsDefault();
glfwMakeContextCurrent(backup_current_context);
}
glfwSwapBuffers(window);
}
====== I attaced the code
I want to solve the ploblem.
