380 lines
12 KiB
C++
380 lines
12 KiB
C++
#include <osg/Group>
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#include <osg/Geometry>
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#include <osg/Geode>
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#include <osg/Projection>
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#include <osg/MatrixTransform>
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#include <osg/BlendFunc>
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#include <osg/LightSource>
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#include <osgProducer/Viewer>
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#include <osgDB/ReadFile>
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#include <osgDB/WriteFile>
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#include <osgText/Text>
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#include <osgUtil/Optimizer>
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#include <osgGA/GUIEventAdapter>
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#include <osgGA/GUIActionAdapter>
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#include <osgFX/Registry>
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#include <osgFX/Effect>
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#include "Frame.h"
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#include <vector>
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#include <string>
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class RotateCallback: public osg::NodeCallback {
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public:
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RotateCallback(): osg::NodeCallback(), enabled_(true) {}
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void operator()(osg::Node *node, osg::NodeVisitor *nv)
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{
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osg::MatrixTransform *xform = dynamic_cast<osg::MatrixTransform *>(node);
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if (xform && enabled_) {
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double t = nv->getFrameStamp()->getReferenceTime();
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xform->setMatrix(osg::Matrix::rotate(t, osg::Vec3(0, 0, 1)));
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}
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traverse(node, nv);
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}
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bool enabled_;
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};
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// yes, I know global variables are not good things in C++
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// but in this case it is useful... :-P
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RotateCallback *rotate_cb;
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class EffectPanel: public Frame {
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public:
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class KeyboardHandler: public osgGA::GUIEventHandler {
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public:
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KeyboardHandler(EffectPanel *ep): ep_(ep) {}
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bool handle(const osgGA::GUIEventAdapter &ea, osgGA::GUIActionAdapter &)
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{
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if (ea.getEventType() == osgGA::GUIEventAdapter::KEYDOWN) {
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if (ea.getKey() == osgGA::GUIEventAdapter::KEY_Right) {
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ep_->setEffectIndex(ep_->getEffectIndex()+1);
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return true;
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}
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if (ea.getKey() == osgGA::GUIEventAdapter::KEY_Left) {
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ep_->setEffectIndex(ep_->getEffectIndex()-1);
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return true;
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}
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if (ea.getKey() == osgGA::GUIEventAdapter::KEY_Return) {
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ep_->setNodeMask(0xffffffff - ep_->getNodeMask());
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return true;
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}
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if (ea.getKey() == osgGA::GUIEventAdapter::KEY_Delete) {
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ep_->setEffectsEnabled(!ep_->getEffectsEnabled());
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return true;
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}
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if (ea.getKey() == 'x') {
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osgDB::writeNodeFile(*ep_->getRoot(), "osgfx_model.osg");
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std::cout << "written nodes to \"osgfx_model.osg\"\n";
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return true;
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}
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if (ea.getKey() == 'r') {
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rotate_cb->enabled_ = !rotate_cb->enabled_;
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return true;
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}
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}
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return false;
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}
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private:
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osg::ref_ptr<EffectPanel> ep_;
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};
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EffectPanel()
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: Frame(),
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selected_fx_(-1),
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fxen_(true),
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root_(new osg::Group),
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hints_color_(0.75f, 0.75f, 0.75f, 1.0f),
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name_color_(1, 1, 1, 1),
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desc_color_(1, 1, 0.7f, 1)
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{
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setBackgroundColor(osg::Vec4(0.3f, 0.1f, 0.15f, 0.75f));
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std::cout << "INFO: available osgFX effects:\n";
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osgFX::Registry::Effect_map emap = osgFX::Registry::instance()->getEffectMap();
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for (osgFX::Registry::Effect_map::const_iterator i=emap.begin(); i!=emap.end(); ++i) {
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std::cout << "INFO: \t" << i->first << "\n";
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osg::ref_ptr<osgFX::Effect> effect = static_cast<osgFX::Effect *>(i->second->cloneType());
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effects_.push_back(effect.get());
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}
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std::cout << "INFO: " << emap.size() << " effect(s) ready.\n";
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if (!effects_.empty()) {
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selected_fx_ = 0;
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}
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}
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inline osg::Group *getRoot() { return root_.get(); }
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inline void setRoot(osg::Group *node) { root_ = node; }
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inline osg::Node *getScene() { return scene_.get(); }
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inline void setScene(osg::Node *node) { scene_ = node; }
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inline bool getEffectsEnabled() const { return fxen_; }
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inline void setEffectsEnabled(bool v)
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{
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fxen_ = v;
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if (getSelectedEffect()) {
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getSelectedEffect()->setEnabled(fxen_);
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}
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}
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inline int getEffectIndex() const { return selected_fx_; }
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inline void setEffectIndex(int i)
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{
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if (i >= static_cast<int>(effects_.size())) i = 0;
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if (i < 0) i = static_cast<int>(effects_.size()-1);
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selected_fx_ = i;
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rebuild();
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}
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inline osgFX::Effect *getSelectedEffect()
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{
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if (selected_fx_ >= 0 && selected_fx_ < static_cast<int>(effects_.size())) {
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return effects_[selected_fx_].get();
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}
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return 0;
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}
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protected:
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void rebuild_client_area(const Rect &client_rect)
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{
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osg::ref_ptr<osgText::Font> arial = osgText::readFontFile("fonts/arial.ttf");
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osg::ref_ptr<osgText::Text> hints = new osgText::Text;
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hints->setFont(arial.get());
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hints->setColor(hints_color_);
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hints->setAlignment(osgText::Text::CENTER_BOTTOM);
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hints->setCharacterSize(13);
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hints->setFontResolution(13, 13);
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hints->setPosition(osg::Vec3((client_rect.x0+client_rect.x1)/2, client_rect.y0 + 4, 0.1f));
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hints->setText("<RETURN> show/hide this panel <LEFT> previous effect <RIGHT> next effect <DEL> enable/disable effects 'x' save to file 'r' rotate/stop");
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addDrawable(hints.get());
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std::string effect_name = "No Effect Selected";
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std::string effect_description = "";
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if (selected_fx_ >= 0 && selected_fx_ < static_cast<int>(effects_.size())) {
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effect_name = effects_[selected_fx_]->effectName();
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std::string author_name = effects_[selected_fx_]->effectAuthor();
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if (!author_name.empty()) {
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effect_description = author_name = "AUTHOR: " + std::string(effects_[selected_fx_]->effectAuthor()) + std::string("\n\n");
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}
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effect_description += "DESCRIPTION:\n" + std::string(effects_[selected_fx_]->effectDescription());
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if (scene_.valid() && root_.valid()) {
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root_->removeChild(0, root_->getNumChildren());
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osg::ref_ptr<osgFX::Effect> effect = effects_[selected_fx_].get();
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effect->setEnabled(fxen_);
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effect->removeChild(0, effect->getNumChildren());
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effect->addChild(scene_.get());
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effect->setUpDemo();
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root_->addChild(effect.get());
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}
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}
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osg::ref_ptr<osgText::Text> ename = new osgText::Text;
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ename->setFont(arial.get());
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ename->setColor(name_color_);
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ename->setAlignment(osgText::Text::CENTER_TOP);
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ename->setCharacterSize(32);
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ename->setFontResolution(32, 32);
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ename->setPosition(osg::Vec3((client_rect.x0 + client_rect.x1) / 2, client_rect.y1 - 22, 0.1f));
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ename->setText(effect_name);
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addDrawable(ename.get());
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osg::ref_ptr<osgText::Text> edesc = new osgText::Text;
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edesc->setMaximumWidth(client_rect.width() - 16);
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edesc->setFont(arial.get());
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edesc->setColor(desc_color_);
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edesc->setAlignment(osgText::Text::LEFT_TOP);
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edesc->setCharacterSize(16);
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edesc->setFontResolution(16, 16);
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edesc->setPosition(osg::Vec3(client_rect.x0 + 8, client_rect.y1 - 60, 0.1f));
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edesc->setText(effect_description);
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addDrawable(edesc.get());
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}
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private:
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int selected_fx_;
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typedef std::vector<osg::ref_ptr<osgFX::Effect> > Effect_list;
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Effect_list effects_;
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bool fxen_;
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osg::ref_ptr<osg::Group> root_;
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osg::ref_ptr<osg::Node> scene_;
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osg::Vec4 hints_color_;
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osg::Vec4 name_color_;
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osg::Vec4 desc_color_;
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};
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osg::Group *build_hud_base(osg::Group *root)
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{
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osg::ref_ptr<osg::Projection> proj = new osg::Projection(osg::Matrix::ortho2D(0, 1024, 0, 768));
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proj->setCullingActive(false);
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root->addChild(proj.get());
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osg::ref_ptr<osg::MatrixTransform> xform = new osg::MatrixTransform(osg::Matrix::identity());
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xform->setReferenceFrame(osg::Transform::RELATIVE_TO_ABSOLUTE);
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proj->addChild(xform.get());
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osg::StateSet *ss = xform->getOrCreateStateSet();
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ss->setRenderBinDetails(100, "RenderBin");
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ss->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
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ss->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
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osg::ref_ptr<osg::BlendFunc> bf = new osg::BlendFunc;
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ss->setAttributeAndModes(bf.get());
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return xform.take();
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}
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EffectPanel *build_gui(osg::Group *root)
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{
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osg::ref_ptr<osg::Group> hud = build_hud_base(root);
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osg::ref_ptr<EffectPanel> effect_panel = new EffectPanel;
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effect_panel->setCaption("osgFX Effect Browser");
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effect_panel->setRect(Rect(20, 20, 1000, 280));
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hud->addChild(effect_panel.get());
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return effect_panel.take();
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}
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void build_world(osg::Group *root, osg::Node *scene, osgProducer::Viewer &viewer)
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{
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osg::ref_ptr<EffectPanel> effect_panel = build_gui(root);
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effect_panel->setScene(scene);
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effect_panel->rebuild();
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viewer.getEventHandlerList().push_front(new EffectPanel::KeyboardHandler(effect_panel.get()));
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root->addChild(effect_panel->getRoot());
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}
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int main(int argc, char *argv[])
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{
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// use an ArgumentParser object to manage the program arguments.
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osg::ArgumentParser arguments(&argc, argv);
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// set up the usage document, in case we need to print out how to use this program.
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arguments.getApplicationUsage()->setApplicationName(arguments.getApplicationName());
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arguments.getApplicationUsage()->setDescription(arguments.getApplicationName() + " is a simple browser that allows you to apply osgFX effects to models interactively.");
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arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName() + " [options] filename ...");
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arguments.getApplicationUsage()->addCommandLineOption("-h or --help", "Display this information");
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arguments.getApplicationUsage()->addKeyboardMouseBinding("Left", "Apply previous effect");
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arguments.getApplicationUsage()->addKeyboardMouseBinding("Right", "Apply next effect");
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arguments.getApplicationUsage()->addKeyboardMouseBinding("Del", "Enable or disable osgFX");
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arguments.getApplicationUsage()->addKeyboardMouseBinding("Return", "Show or hide the effect information panel");
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arguments.getApplicationUsage()->addKeyboardMouseBinding("x", "Save the scene graph with current effect applied");
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// construct the viewer.
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osgProducer::Viewer viewer(arguments);
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// set up the value with sensible default event handlers.
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viewer.setUpViewer(osgProducer::Viewer::STANDARD_SETTINGS);
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// get details on keyboard and mouse bindings used by the viewer.
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viewer.getUsage(*arguments.getApplicationUsage());
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// if user request help write it out to cout.
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if (arguments.read("-h") || arguments.read("--help")) {
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arguments.getApplicationUsage()->write(std::cout);
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return 1;
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}
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// any option left unread are converted into errors to write out later.
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arguments.reportRemainingOptionsAsUnrecognized();
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// report any errors if they have occured when parsing the program aguments.
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if (arguments.errors()) {
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arguments.writeErrorMessages(std::cout);
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return 1;
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}
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if (arguments.argc() <= 1) {
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arguments.getApplicationUsage()->write(std::cout, osg::ApplicationUsage::COMMAND_LINE_OPTION);
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return 1;
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}
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osg::Timer timer;
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osg::Timer_t start_tick = timer.tick();
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// read the scene from the list of file specified commandline args.
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osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFiles(arguments);
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// if no model has been successfully loaded report failure.
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if (!loadedModel) {
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std::cout << arguments.getApplicationName() << ": No data loaded" << std::endl;
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return 1;
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}
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osg::Timer_t end_tick = timer.tick();
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std::cout << "Time to load = " << timer.delta_s(start_tick,end_tick) << std::endl;
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// optimize the scene graph, remove rendundent nodes and state etc.
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osgUtil::Optimizer optimizer;
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optimizer.optimize(loadedModel.get());
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// set up a transform to rotate the model
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osg::ref_ptr<osg::MatrixTransform> xform = new osg::MatrixTransform;
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rotate_cb = new RotateCallback;
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xform->setUpdateCallback(rotate_cb);
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xform->addChild(loadedModel.get());
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osg::ref_ptr<osg::Light> light = new osg::Light;
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light->setLightNum(0);
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light->setDiffuse(osg::Vec4(1, 1, 1, 1));
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light->setSpecular(osg::Vec4(1, 1, 0.8f, 1));
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light->setAmbient(osg::Vec4(0.2f, 0.2f, 0.2f, 0.2f));
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light->setPosition(osg::Vec4(1, -1, 1, 0));
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osg::ref_ptr<osg::LightSource> root = new osg::LightSource;
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root->setLight(light.get());
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root->setLocalStateSetModes();
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build_world(root.get(), xform.get(), viewer);
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// set the scene to render
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viewer.setSceneData(root.get());
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// create the windows and run the threads.
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viewer.realize();
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while(!viewer.done())
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{
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// wait for all cull and draw threads to complete.
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viewer.sync();
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// update the scene by traversing it with the the update visitor which will
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// call all node update callbacks and animations.
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viewer.update();
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// fire off the cull and draw traversals of the scene.
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viewer.frame();
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}
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// wait for all cull and draw threads to complete before exit.
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viewer.sync();
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return 0;
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}
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