Tutorial - Setup Horde with Gtkmm

Here is a small example on how to use Horde with Gtkmm. This is a small tutorial on how to setup Horde with Gtk+ using Gtkmm and Gtkglextmm. This one is setup with the knight example. I leave the adjusting of the camera to you :) cHordeWidget.hpp #ifndef CHORDEWIDGET_HPP_INCLUDED #define CHORDEWIDGET_HPP_INCLUDED #include <iostream> #include <Horde3D.h> #include <Horde3DUtils.h> #include <cstdlib> #include <gtkmm.h> #include <gtkglmm.h> #include <sstream> #include <math.h> #include <iomanip> using namespace std; class cHordeWidget : public Gtk::GL::DrawingArea{ public: cHordeWidget(); virtual ~cHordeWidget(); bool on_timeout(); protected: virtual void on_realize(); virtual bool on_configure_event(GdkEventConfigure* event); virtual bool on_expose_event(GdkEventExpose* event); void init_hordeScene(); void setup_hordeViewport(); void render_hordeScene(); void update_hordeScene(); private: ResHandle _pipeRes, _fontMatRes, _logoMatRes, _hdrPipeRes, _forwardPipeRes; NodeHandle _cam, _knight, _particleSys; float _x, _y, _z, _rx, _ry; // Viewer position and orientation float _velocity; // Velocity for movement float _curFPS, _timer; stringstream _fpsText; bool _freeze, _showFPS, _debugViewMode, _wireframeMode; float _animTime, _weight; }; #endif // CHORDEWIDGET_HPP_INCLUDED Now for the cHordeWidget.cpp *Read the comments* cHordeWidget.cpp #include "../include/cHordeWidget.hpp" NodeHandle model = 0, cam = 0; cHordeWidget::cHordeWidget(){ Glib::RefPtr<Gdk::GL::Config> glconfig; //Pick are opengl options glconfig = Gdk::GL::Config::create(Gdk::GL::MODE_RGB | Gdk::GL::MODE_DEPTH | Gdk::GL::MODE_DOUBLE); //set the opengl options set_gl_capability(glconfig); //add are idle signal. Glib::signal_timeout().connect( sigc::mem_fun(*this, &cHordeWidget::on_timeout), 20 ); } cHordeWidget::~cHordeWidget(){ Horde3D::release(); } void cHordeWidget::on_realize(){ Gtk::GL::DrawingArea::on_realize(); //get gl::window Glib::RefPtr<Gdk::GL::Window> glwindow = get_gl_window(); //begin gl commands glwindow->gl_begin(get_gl_context()); //init horde init_hordeScene(); /end gl commands glwindow->gl_end(); } bool cHordeWidget::on_configure_event(GdkEventConfigure* event){ Glib::RefPtr<Gdk::GL::Window> glwindow = get_gl_window(); glwindow->gl_begin(get_gl_context()); //setup the viewport setup_hordeViewport(); glwindow->gl_end(); return true; } bool cHordeWidget::on_expose_event(GdkEventExpose* event){ Glib::RefPtr<Gdk::GL::Window> glwindow = get_gl_window(); glwindow->gl_begin(get_gl_context()); //render the horde scene render_hordeScene(); //swap are gl buffers use glflush if you use only one buffer glwindow->swap_buffers(); glwindow->gl_end(); return true; } bool cHordeWidget::on_timeout(){ //update the horde scee update_hordeScene(); return true; } void cHordeWidget::init_hordeScene(){ Horde3DUtils::setResourcePath( ResourceTypes::SceneGraph, "models" ); Horde3DUtils::setResourcePath( ResourceTypes::Geometry, "models" ); Horde3DUtils::setResourcePath( ResourceTypes::Animation, "models" ); Horde3DUtils::setResourcePath( ResourceTypes::Material, "materials" ); Horde3DUtils::setResourcePath( ResourceTypes::Code, "shaders" ); Horde3DUtils::setResourcePath( ResourceTypes::Shader, "shaders" ); Horde3DUtils::setResourcePath( ResourceTypes::Texture2D, "textures" ); Horde3DUtils::setResourcePath( ResourceTypes::TextureCube, "textures" ); Horde3DUtils::setResourcePath( ResourceTypes::Effect, "effects" ); Horde3DUtils::setResourcePath( ResourceTypes::Pipeline, "pipelines" ); // Set options Horde3D::setOption( EngineOptions::LoadTextures, 1 ); Horde3D::setOption( EngineOptions::TexCompression, 0 ); Horde3D::setOption( EngineOptions::FastAnimation, 0 ); Horde3D::setOption( EngineOptions::AnisotropyFactor, 8 ); Horde3D::setOption( EngineOptions::ShadowMapSize, 2048 ); // Add resources // Pipelines _hdrPipeRes = Horde3D::addResource( ResourceTypes::Pipeline, "hdr.pipeline.xml", 0 ); _forwardPipeRes = Horde3D::addResource( ResourceTypes::Pipeline, "forward.pipeline.xml", 0 ); // Font _fontMatRes = Horde3D::addResource( ResourceTypes::Material, "font.material.xml", 0 ); // Logo _logoMatRes = Horde3D::addResource( ResourceTypes::Material, "logo.material.xml", 0 ); // Environment ResHandle envRes = Horde3D::addResource( ResourceTypes::SceneGraph, "sphere.scene.xml", 0 ); // Knight ResHandle knightRes = Horde3D::addResource( ResourceTypes::SceneGraph, "knight.scene.xml", 0 ); ResHandle knightAnim1Res = Horde3D::addResource( ResourceTypes::Animation, "knight_order.anim", 0 ); ResHandle knightAnim2Res = Horde3D::addResource( ResourceTypes::Animation, "knight_attack.anim", 0 ); // Particle system ResHandle particleSysRes = Horde3D::addResource( ResourceTypes::SceneGraph, "particleSys1.scene.xml", 0 ); // Load resources Horde3DUtils::loadResourcesFromDisk( "media" ); // Add scene nodes // Add camera _cam = Horde3D::addCameraNode( RootNode, "Camera", _hdrPipeRes ); //Horde3D::setNodeParami( _cam, CameraNodeParams::OcclusionCulling, 1 ); // Add environment NodeHandle env = Horde3D::addNodes( RootNode, envRes ); Horde3D::setNodeTransform( env, 0, -20, 0, 0, 0, 0, 20, 20, 20 ); // Add knight _knight = Horde3D::addNodes( RootNode, knightRes ); Horde3D::setNodeTransform( _knight, 0, 0, 0, 0, 180, 0, 0.1f, 0.1f, 0.1f ); Horde3D::setupModelAnimStage( _knight, 0, knightAnim1Res, "", false ); Horde3D::setupModelAnimStage( _knight, 1, knightAnim2Res, "", false ); // Attach particle system to hand joint Horde3D::findNodes( _knight, "Bip01_R_Hand", SceneNodeTypes::Joint ); NodeHandle hand = Horde3D::getNodeFindResult( 0 ); _particleSys = Horde3D::addNodes( hand, particleSysRes ); Horde3D::setNodeTransform( _particleSys, 0, 40, 0, 90, 0, 0, 1, 1, 1 ); // Add light source NodeHandle light = Horde3D::addLightNode( RootNode, "Light1", 0, "LIGHTING", "SHADOWMAP" ); Horde3D::setNodeTransform( light, 0, 15, 10, -60, 0, 0, 1, 1, 1 ); Horde3D::setNodeParamf( light, LightNodeParams::Radius, 30 ); Horde3D::setNodeParamf( light, LightNodeParams::FOV, 90 ); Horde3D::setNodeParami( light, LightNodeParams::ShadowMapCount, 1 ); Horde3D::setNodeParamf( light, LightNodeParams::ShadowMapBias, 0.01f ); Horde3D::setNodeParamf( light, LightNodeParams::Col_R, 1.0f ); Horde3D::setNodeParamf( light, LightNodeParams::Col_G, 0.8f ); Horde3D::setNodeParamf( light, LightNodeParams::Col_B, 0.7f ); // Customize post processing effects NodeHandle matRes = Horde3D::findResource( ResourceTypes::Material, "postHDR.material.xml" ); // hdrParams: exposure, brightpass threshold, brightpass offset (see shader for description) Horde3D::setMaterialUniform( matRes, "hdrParams", 2.5f, 0.5f, 0.08f, 0 ); } void cHordeWidget::setup_hordeViewport(){ //We have to init horde here becuase this is the first thing gtkmm calls when the widget is created. //This is also called everytime the window is expanded the boolean is there just so nothing bad happens when initing horde over and over. bool hinit = false; if(hinit == false){ Horde3D::init(); hinit = true;} Horde3D::resize(0,0,get_width(),get_height()); Horde3D::setupCameraView(cam,45.0f,(float)get_width()/get_height(),0.1f,1000.0f); } void cHordeWidget::render_hordeScene(){ float fps = 60; _curFPS = fps; _timer += 1 / fps; Horde3D::setOption( EngineOptions::DebugViewMode, _debugViewMode ? 1.0f : 0.0f ); Horde3D::setOption( EngineOptions::WireframeMode, _wireframeMode ? 1.0f : 0.0f ); _animTime += 1.0f / _curFPS; // Do animation blending Horde3D::setModelAnimParams( _knight, 0, _animTime * 24.0f, _weight ); Horde3D::setModelAnimParams( _knight, 1, _animTime * 24.0f, 1.0f - _weight ); // Animate particle systems (several emitters in a group node) unsigned int cnt = cnt = Horde3D::findNodes( _particleSys, "", SceneNodeTypes::Emitter ); for( unsigned int i = 0; i < cnt; ++i ) Horde3D::advanceEmitterTime( Horde3D::getNodeFindResult( i ), 1.0f / _curFPS ); // Set camera parameters Horde3D::setNodeTransform( _cam, _x, _y, _z, _rx ,_ry, 0, 1, 1, 1 ); // Show logo Horde3D::showOverlay( 0.75f, 0, 0, 0, 1, 0, 1, 0, 1, 0.2f, 1, 1, 0.75f, 0.2f, 0, 1, 7, _logoMatRes ); // Render scene Horde3D::render( _cam ); // Remove all overlays Horde3D::clearOverlays(); } void cHordeWidget::update_hordeScene(){ //This is to update the screen when it goes idle you can use this has a extra update function. Glib::RefPtr<Gdk::Window> win = get_window(); Gdk::Rectangle r(0, 0,get_width(),get_height()); Gtk::Widget::queue_draw(); } Now for the window widget. cWindow.hpp #ifndef CWINDOW_HPP_INCLUDED #define CWINDOW_HPP_INCLUDED #include <gtkmm.h> #include "cHordeWidget.hpp" class cWindow : public Gtk::Window{ public: cWindow(); virtual ~cWindow(); protected: virtual bool on_key_press_event(GdkEventKey* event); private: Gtk::VBox m_vBox; cHordeWidget m_hordeWidget; }; #endif // CWINDOW_HPP_INCLUDED Now the window widgets cpp cWindow.cpp #include "../include/cWindow.hpp" cWindow::cWindow(){ //set the windows title set_title("Horde with gtkmm"); //makes the window update if it is expanded etc. set_reallocate_redraws(true); //adds a box to place the hordewidget and other widgets into add(m_vBox); //sets the minimum and default size for our window m_hordeWidget.set_size_request(800,600); //makes the widget expand when the window is expanded m_vBox.pack_start(m_hordeWidget); //shows all widgets. by default all widgets are invisible. show_all(); } cWindow::~cWindow(){ } bool cWindow::on_key_press_event(GdkEventKey* event){ switch (event->keyval) { case GDK_a: std::cout<<"test"; break; case GDK_Escape: //ends our app Gtk::Main::quit(); break; default: return true; } return true; } Finnaly the main.cpp *Read the Comments* main.cpp #include <gtkmm.h> //Include are custom widget #include "include/cHordeWidget.hpp" int main(int argc, char *argv[]){ //Init Gtk+ Gtk::Main init (argc, argv); //Init Gtk+ opengl Gtk::GL::init (argc, argv); //Create our Window object Gtk::Window window; //Set our window title window.set_title ("Horde3D In Gtk+ Window"); //Create our cHordeWidget cHordeWidget drawing; //Set the cHordeWidgets size drawing.set_size_request(800, 600); //Add the cHordeWidget to our window window.add (drawing); //Show our cHordeWidget. All widgets are invisible by default. window.show_all (); //Run our window Gtk::Main::run (window); //Just a return statement return EXIT_SUCCESS; } --Rj 23:21, 8 August 2008 (CEST)

Horde With Gtkmm This tutorial introduces the use of Horde3D with Gtkmm Version: 1.0 Compatible with Horde3D: 1.0 beta Release date: 2008-07-8 Author(s): Raynaldo Rivera