Gabriele Cosmo
398 lines
15 KiB
C++
398 lines
15 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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// John Allison 6th October 2019
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#if defined (G4VIS_BUILD_TOOLSSG_DRIVER) || defined (G4VIS_USE_TOOLSSG)
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#ifndef G4TOOLSSGVIEWER_HH
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#define G4TOOLSSGVIEWER_HH
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#include "G4VViewer.hh"
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#include "G4ToolsSGSceneHandler.hh"
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#include "G4Scene.hh"
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#include <tools/sg/device_interactor>
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#include <tools/sg/separator>
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#include <tools/sg/head_light>
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#include <tools/sg/ortho>
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#include <tools/sg/perspective>
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#include <tools/sg/blend>
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#include <tools/sg/noderef>
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#include <tools/sg/keys>
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template <class SG_SESSION,class SG_VIEWER>
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class G4ToolsSGViewer : public G4VViewer, tools::sg::device_interactor {
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typedef G4VViewer parent;
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typedef tools::sg::device_interactor parent_interactor;
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public: //tools::sg::device_interactor interface.
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virtual void key_press(const tools::sg::key_down_event& a_event) {
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fKeyPressed = true;
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fKeyShift = a_event.key() == tools::sg::key_shift()?true:false;
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}
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virtual void key_release(const tools::sg::key_up_event&) {fKeyPressed = false;}
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virtual void mouse_press(const tools::sg::mouse_down_event& a_event) {
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fMousePressed = true;
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fMousePressedX = a_event.x();
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fMousePressedY = a_event.y();
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}
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virtual void mouse_release(const tools::sg::mouse_up_event&) {fMousePressed = false;}
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virtual void mouse_move(const tools::sg::mouse_move_event& a_event) {
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G4double x = a_event.x();
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G4double y = a_event.y();
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G4double dx = x-fMousePressedX;
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G4double dy = y-fMousePressedY;
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fMousePressedX = x;
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fMousePressedY = y;
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if (fMousePressed) {
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if (fKeyPressed && fKeyShift) { // Translation (pan)
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const G4double sceneRadius = fSGSceneHandler.GetScene()->GetExtent().GetExtentRadius();
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const G4double scale = 300; // Roughly pixels per window, empirically chosen
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const G4double dxScene = dx*sceneRadius/scale;
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const G4double dyScene = dy*sceneRadius/scale;
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fVP.IncrementPan(-dxScene,dyScene);
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} else { // Rotation
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// Simple ad-hoc algorithms
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const G4Vector3D& x_prime = fVP.GetViewpointDirection().cross(fVP.GetUpVector());
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const G4Vector3D& y_prime = x_prime.cross(fVP.GetViewpointDirection());
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const G4double scale = 200; // Roughly pixels per window, empirically chosen
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G4Vector3D newViewpointDirection = fVP.GetViewpointDirection();
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newViewpointDirection += dx*x_prime/scale;
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newViewpointDirection += dy*y_prime/scale;
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fVP.SetViewpointDirection(newViewpointDirection.unit());
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if (fVP.GetRotationStyle() == G4ViewParameters::freeRotation) {
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G4Vector3D newUpVector = fVP.GetUpVector();
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newUpVector += dx*x_prime/scale;
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newUpVector += dy*y_prime/scale;
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fVP.SetUpVector(newUpVector.unit());
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}
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}
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}
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SetView();
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DrawView();
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}
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virtual void wheel_rotate(const tools::sg::wheel_rotate_event& a_event) {
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const G4double angleY = a_event.angle();
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if (fVP.GetFieldHalfAngle() == 0.) { // Orthographic projection
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const G4double scale = 500; // Empirically chosen
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fVP.MultiplyZoomFactor(1.+angleY/scale);
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} else { // Perspective projection
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const G4double scale = fVP.GetFieldHalfAngle()/(10.*CLHEP::deg); // Empirical
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fVP.SetDolly(fVP.GetDolly()+angleY/scale);
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}
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SetView();
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DrawView();
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}
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public:
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G4ToolsSGViewer(SG_SESSION& a_session,G4ToolsSGSceneHandler& a_scene_handler, const G4String& a_name)
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:parent(a_scene_handler,a_scene_handler.IncrementViewCount(),a_name)
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,fSGSession(a_session)
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,fSGSceneHandler(a_scene_handler)
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,fSGViewer(nullptr)
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,fKeyPressed(false)
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,fKeyShift(false)
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,fMousePressed(false)
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,fMousePressedX(0)
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,fMousePressedY(0)
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{
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//::printf("debug : G4ToolsSGViewer::G4ToolsSGViewer.\n");
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}
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virtual ~G4ToolsSGViewer() {
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delete fSGViewer;
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//::printf("debug : G4ToolsSGViewer::~G4ToolsSGViewer.\n");
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}
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protected:
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G4ToolsSGViewer(const G4ToolsSGViewer& a_from)
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:parent(a_from)
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,parent_interactor(a_from)
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,fSGSession(a_from.fSGSession)
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,fSGSceneHandler(a_from.fSGSceneHandler)
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,fSGViewer(nullptr)
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,fKeyPressed(false)
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,fKeyShift(false)
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,fMousePressed(false)
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,fMousePressedX(0)
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,fMousePressedY(0)
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{}
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G4ToolsSGViewer& operator=(const G4ToolsSGViewer&) {return *this;}
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public:
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virtual void Initialise() {
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if(fSGViewer) return; //done.
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fVP.SetAutoRefresh(true);
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fDefaultVP.SetAutoRefresh(true);
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//::printf("debug : G4ToolsSGViewer::Initialise\n");
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//////////////////////////////////////////////////////////
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/// create the viewer, set the scene graph ///////////////
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//////////////////////////////////////////////////////////
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fSGViewer = new SG_VIEWER(fSGSession
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,fVP.GetWindowAbsoluteLocationHintX(1440)
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,fVP.GetWindowAbsoluteLocationHintY(900)
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,fVP.GetWindowSizeHintX()
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,fVP.GetWindowSizeHintY()
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,fName);
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if(!fSGViewer->has_window()) {
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fViewId = -1; // This flags an error.
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G4cerr << "G4ToolsSGViewer::Initialise : SG_VIEWER::has_window() failed." << G4endl;
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return;
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}
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fSGViewer->set_clear_color(0.3,0.3,0.3,1);
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fSGViewer->set_device_interactor(this);
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}
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virtual void SetView() {
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//::printf("debug : G4ToolsSGViewer::SetView\n");
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if(!fSceneHandler.GetScene()) {
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fSGViewer->set_clear_color(0.3,0.3,0.3,1); //some grey color to signal the user that something is wrong.
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G4cerr << "G4ToolsSGViewer::SetView : no G4Scene.." << G4endl;
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return;
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}
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//////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////
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// Get radius of scene, etc.
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// Note that this procedure properly takes into account zoom, dolly and pan.
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const G4Point3D targetPoint
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= fSceneHandler.GetScene()->GetStandardTargetPoint() + fVP.GetCurrentTargetPoint ();
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G4double radius = fSceneHandler.GetScene()->GetExtent().GetExtentRadius();
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if(radius<=0.) radius = 1.;
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const G4double cameraDistance = fVP.GetCameraDistance (radius);
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const G4Point3D cameraPosition = targetPoint + cameraDistance * fVP.GetViewpointDirection().unit();
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const G4Normal3D& up = fVP.GetUpVector ();
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const G4double pnear = fVP.GetNearDistance (cameraDistance, radius);
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const G4double pfar = fVP.GetFarDistance (cameraDistance, pnear, radius);
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//const G4double right = fVP.GetFrontHalfHeight (pnear, radius);
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//const G4double left = -right;
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const G4double top = fVP.GetFrontHalfHeight (pnear, radius);
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const G4double bottom = -top;
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// sanity check :
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tools::vec3f dir(float(targetPoint.x()-cameraPosition.x()),
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float(targetPoint.y()-cameraPosition.y()),
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float(targetPoint.z()-cameraPosition.z()));
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if(!dir.length()) {
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fSGViewer->set_clear_color(0.3,0.3,0.3,1);
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G4cerr << "G4ToolsSGViewer::SetView : null size viewer area." << G4endl;
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return;
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}
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//::printf("debug : GB : SetView : 1-001 : %g %g %g : %g %g %g : h %g : %g %g\n",
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// targetPoint.x(),targetPoint.y(),targetPoint.z(),
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// cameraPosition.x(),cameraPosition.y(),cameraPosition.z(),top-bottom,pnear,pfar);
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//////////////////////////////////////////////////////////
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/// create scene graph ///////////////////////////////////
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//////////////////////////////////////////////////////////
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// Set projection, then create the tools::sg camera node :
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tools::sg::base_camera* _camera = nullptr;
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if (fVP.GetFieldHalfAngle() <= 0.) {
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if((top-bottom)<=0) {
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fSGViewer->set_clear_color(0.3,0.3,0.3,1);
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G4cerr << "G4ToolsSGViewer::SetView : for ortho camera, (top-bottom)<=0." << G4endl;
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return;
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}
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tools::sg::ortho* ortho_camera = new tools::sg::ortho;
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ortho_camera->height.value(float(top-bottom));
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_camera = ortho_camera;
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} else {
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tools::sg::perspective* perspective_camera = new tools::sg::perspective;
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perspective_camera->height_angle.value(float(2*fVP.GetFieldHalfAngle()));
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_camera = perspective_camera;
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}
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_camera->position.value
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(tools::vec3f(float(cameraPosition.x()),
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float(cameraPosition.y()),
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float(cameraPosition.z())));
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_camera->znear.value(float(pnear));
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_camera->zfar.value(float(pfar));
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_camera->look_at(dir,tools::vec3f(up.x(),up.y(),up.z())); //same logic as in G4OpenInventorViewer.
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tools::sg::separator* sep = new tools::sg::separator;
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sep->add(_camera);
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{tools::sg::head_light* light = new tools::sg::head_light;
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//light->direction = tools::vec3f(1,-1,-10);
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light->direction = tools::vec3f(0,0,-1);
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light->on = true;
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sep->add(light);}
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{tools::sg::blend* blend = new tools::sg::blend;
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blend->on = true; //to handle transparency.
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sep->add(blend);}
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sep->add(new tools::sg::noderef(*fSGSceneHandler.ToolsSGScene()));
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fSGViewer->sg().clear();
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fSGViewer->sg().add(sep); //give sep ownership to the viewer.
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{G4Color background = fVP.GetBackgroundColour ();
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fSGViewer->set_clear_color(float(background.GetRed()),float(background.GetBlue()),float(background.GetBlue()),1);}
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}
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virtual void ClearView() {}
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virtual void DrawView() {
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if (!fNeedKernelVisit) KernelVisitDecision();
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G4bool kernelVisitWasNeeded = fNeedKernelVisit; // Keep (ProcessView resets).
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fLastVP = fVP;
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ProcessView(); // Clears store and processes scene only if necessary.
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if (kernelVisitWasNeeded) {
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// We might need to do something if the kernel was visited.
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} else {
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}
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FinishView (); // Flush streams and/or swap buffers.
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}
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virtual void ShowView() {
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if(!fSGViewer) return;
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fSGViewer->show();
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fSGViewer->win_render();
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fSGSession.sync();
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}
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virtual void FinishView() {
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if(!fSGViewer) return;
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fSGViewer->show();
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fSGViewer->win_render();
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fSGSession.sync();
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}
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#ifdef G4MULTITHREADED
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virtual void SwitchToVisSubThread() {}
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virtual void SwitchToMasterThread() {
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if (G4Threading::IsMultithreadedApplication()) {
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// I have not figured out how to draw during a run.
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//
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// Setting fNeedKernelVisit=true causes scene deletion and a complete rebuild,
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// including trajectories, hits, etc. from kept events.
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//
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// Clearly this is a limitation because even if you run 1000 events you only
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// get those kept (default 100), and even worse, if end-if-event-action is
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// "refresh", you only get one event (the last I think).
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//
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// Also, strictly, there is no need to rebuid run-duration models (detector),
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// but a complete rebuild is the easiest way (already imeplemented).
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fNeedKernelVisit = true;
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DrawView(); // Draw trajectories, etc., from kept events
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}
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}
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#endif
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//SG_VIEWER* sg_viewer() {return fSGViewer;}
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protected:
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void KernelVisitDecision () {
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if (CompareForKernelVisit(fLastVP)) {
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NeedKernelVisit (); // Sets fNeedKernelVisit.
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}
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}
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G4bool CompareForKernelVisit(G4ViewParameters& lastVP) {
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// Typical comparison. Taken from OpenGL.
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if (
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(lastVP.GetDrawingStyle () != fVP.GetDrawingStyle ()) ||
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(lastVP.GetNumberOfCloudPoints() != fVP.GetNumberOfCloudPoints()) ||
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(lastVP.IsAuxEdgeVisible () != fVP.IsAuxEdgeVisible ()) ||
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(lastVP.IsCulling () != fVP.IsCulling ()) ||
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(lastVP.IsCullingInvisible () != fVP.IsCullingInvisible ()) ||
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(lastVP.IsDensityCulling () != fVP.IsDensityCulling ()) ||
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(lastVP.IsCullingCovered () != fVP.IsCullingCovered ()) ||
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(lastVP.GetCBDAlgorithmNumber() !=
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fVP.GetCBDAlgorithmNumber()) ||
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(lastVP.IsSection () != fVP.IsSection ()) ||
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(lastVP.IsCutaway () != fVP.IsCutaway ()) ||
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(lastVP.IsExplode () != fVP.IsExplode ()) ||
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(lastVP.GetNoOfSides () != fVP.GetNoOfSides ()) ||
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(lastVP.GetGlobalMarkerScale() != fVP.GetGlobalMarkerScale()) ||
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(lastVP.GetGlobalLineWidthScale() != fVP.GetGlobalLineWidthScale()) ||
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(lastVP.IsMarkerNotHidden () != fVP.IsMarkerNotHidden ()) ||
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(lastVP.GetDefaultVisAttributes()->GetColour() !=
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fVP.GetDefaultVisAttributes()->GetColour()) ||
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(lastVP.GetDefaultTextVisAttributes()->GetColour() !=
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fVP.GetDefaultTextVisAttributes()->GetColour()) ||
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(lastVP.GetBackgroundColour ()!= fVP.GetBackgroundColour ())||
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(lastVP.IsPicking () != fVP.IsPicking ()) ||
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(lastVP.GetVisAttributesModifiers() !=
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fVP.GetVisAttributesModifiers()) ||
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(lastVP.IsSpecialMeshRendering() !=
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fVP.IsSpecialMeshRendering())
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) {
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return true;
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}
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if (lastVP.IsDensityCulling () &&
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(lastVP.GetVisibleDensity () != fVP.GetVisibleDensity ())) return true;
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if (lastVP.GetCBDAlgorithmNumber() > 0) {
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if (lastVP.GetCBDParameters().size() != fVP.GetCBDParameters().size()) return true;
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else if (lastVP.GetCBDParameters() != fVP.GetCBDParameters()) return true;
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}
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if (lastVP.IsExplode () &&
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(lastVP.GetExplodeFactor () != fVP.GetExplodeFactor ()))
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return true;
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if (lastVP.IsSpecialMeshRendering() &&
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(lastVP.GetSpecialMeshVolumes() != fVP.GetSpecialMeshVolumes()))
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return true;
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return false;
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}
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// void keyPressEvent (KeyEvent*);
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// void keyReleaseEvent (KeyEvent*);
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// void mouseDoubleClickEvent(MouseEvent*);
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// void mouseMoveEvent (MouseEvent*);
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// void mousePressEvent (MouseEvent*);
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// void mouseReleaseEvent (MouseEvent*);
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// void wheelEvent (WheelEvent*);
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protected:
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SG_SESSION& fSGSession;
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G4ToolsSGSceneHandler& fSGSceneHandler;
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SG_VIEWER* fSGViewer;
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G4ViewParameters fLastVP; // Memory for making kernel visit decisions.
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G4bool fKeyPressed;
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G4bool fKeyShift;
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G4bool fMousePressed;
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G4double fMousePressedX, fMousePressedY;
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};
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#endif
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#endif
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