Source

Coin / src / soscxml / SoScXMLStateMachine.cpp

Tom Fredrik Blen… f9fcec5 
Marius Kintel 3ba6b41 




























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Tom Fredrik Blen… 1cda217 
Tom Fredrik Blen… f9fcec5 




Tom Fredrik Blen… 1cda217 
Tom Fredrik Blen… f9fcec5 



Tom Fredrik Blen… 1cda217 
Tom Fredrik Blen… f9fcec5 



Tom Fredrik Blen… 1cda217 
Tom Fredrik Blen… f9fcec5 




Tom Fredrik Blen… 1cda217 
Tom Fredrik Blen… f9fcec5 



Tom Fredrik Blen… 1cda217 
Tom Fredrik Blen… f9fcec5 



Tom Fredrik Blen… 1cda217 
Tom Fredrik Blen… f9fcec5 




Tom Fredrik Blen… 1cda217 
Tom Fredrik Blen… f9fcec5 




Tom Fredrik Blen… 1cda217 
Tom Fredrik Blen… f9fcec5 




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Tom Fredrik Blen… 1cda217 
Tom Fredrik Blen… f9fcec5 






Tom Fredrik Blen… 1cda217 
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Tom Fredrik Blen… 1cda217 
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/**************************************************************************\
 * Copyright (c) Kongsberg Oil & Gas Technologies AS
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 
 * Neither the name of the copyright holder nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\**************************************************************************/

#include <Inventor/scxml/SoScXMLStateMachine.h>

/*!
  \class SoScXMLStateMachine SoScXMLStateMachine.h Inventor/scxml/SoScXMLStateMachine.h
  \brief Integration level for using Coin events with SCXML-based state machines.

  This class is part of integrating the Coin types with the SCXML
  subsystem.  SoScXMLStateMachines adds convenience for using SCXML
  state machines together with Coin events.

  \since Coin 3.0
  \ingroup soscxml
*/

#include <boost/scoped_ptr.hpp>
#include <boost/intrusive_ptr.hpp>

#include <Inventor/SbString.h>
#include <Inventor/SbViewportRegion.h>
#include <Inventor/errors/SoDebugError.h>
#include <Inventor/actions/SoRayPickAction.h>
#include <Inventor/SoPickedPoint.h>
#include <Inventor/nodes/SoCamera.h>
#include <Inventor/events/SoEvents.h>
#include <Inventor/scxml/ScXML.h>
#include <Inventor/scxml/SoScXMLEvent.h>
#include "base/coinString.h"
#include "scxml/SbStringConvert.h"
#include "SbBasicP.h"

// *************************************************************************

class SoScXMLStateMachine::PImpl {
public:
  PImpl(void)
    : scenegraphroot(NULL), activecamera(NULL), viewport(100, 100)
  { }
  ~PImpl(void) { }

  // hold a couple of custom non-SoEvent-based events
  boost::scoped_ptr<ScXMLEvent> preGLRenderEvent;
  boost::scoped_ptr<ScXMLEvent> postGLRenderEvent;

  boost::intrusive_ptr<SoNode> scenegraphroot;
  boost::intrusive_ptr<SoCamera> activecamera;
  SbViewportRegion viewport;

  mutable SbString varstring;
};

#define PRIVATE(obj) ((obj)->pimpl)

SCXML_OBJECT_SOURCE(SoScXMLStateMachine);

void
SoScXMLStateMachine::initClass(void)
{
  SCXML_OBJECT_INIT_CLASS(SoScXMLStateMachine, ScXMLStateMachine, "ScXMLStateMachine");
}

void
SoScXMLStateMachine::cleanClass(void)
{
  SoScXMLStateMachine::classTypeId = SoType::badType();
}

SoScXMLStateMachine::SoScXMLStateMachine(void)
{
  // initialize custom events
  PRIVATE(this)->preGLRenderEvent.reset(new ScXMLEvent);
  PRIVATE(this)->preGLRenderEvent->setEventName("sim.coin3d.coin.GLRender.PRE_RENDER");
  PRIVATE(this)->postGLRenderEvent.reset(new ScXMLEvent);
  PRIVATE(this)->postGLRenderEvent->setEventName("sim.coin3d.coin.GLRender.POST_RENDER");
}

SoScXMLStateMachine::~SoScXMLStateMachine(void)
{
}

void
SoScXMLStateMachine::setSceneGraphRoot(SoNode * root)
{
  PRIVATE(this)->scenegraphroot = root;
}

SoNode *
SoScXMLStateMachine::getSceneGraphRoot(void) const
{
  return PRIVATE(this)->scenegraphroot.get();
}

void
SoScXMLStateMachine::setActiveCamera(SoCamera * camera)
{
  PRIVATE(this)->activecamera = camera;
}

SoCamera *
SoScXMLStateMachine::getActiveCamera(void) const
{
  return PRIVATE(this)->activecamera.get();
}

void
SoScXMLStateMachine::setViewportRegion(const SbViewportRegion & vp)
{
  PRIVATE(this)->viewport = vp;
}

const SbViewportRegion &
SoScXMLStateMachine::getViewportRegion(void) const
{
  return PRIVATE(this)->viewport;
}

void
SoScXMLStateMachine::preGLRender(void)
{
  this->queueEvent(PRIVATE(this)->preGLRenderEvent.get());
  this->processEventQueue();
}

void
SoScXMLStateMachine::postGLRender(void)
{
  this->queueEvent(PRIVATE(this)->postGLRenderEvent.get());
  this->processEventQueue();
}

/*!
  This function makes the state machine process an SoEvent.
*/
SbBool
SoScXMLStateMachine::processSoEvent(const SoEvent * event)
{
  // FIXME: Not sure if this check should be here and not somewhere else,
  // but removing this again makes us crash on NULL scenegraphs. kintel 20080729.
  if (PRIVATE(this)->scenegraphroot.get()) {
    boost::scoped_ptr<SoScXMLEvent> wrapperevent;
    wrapperevent.reset(new SoScXMLEvent);
    wrapperevent->setSoEvent(event);
    wrapperevent->setUpIdentifier();
    this->queueEvent(wrapperevent.get());
    return this->processEventQueue();
  }
  else {
    return false;
  }
}

/*!
  The string returned from this function is only valid until the next variable is
  requested.
*/
const char *
SoScXMLStateMachine::getVariable(const char * key) const
{
  if (strncmp(key, "_event.", 7) == 0) {
    // printf("scan for key '%s'\n", key);
    const char * subkey = key + 7;
    const ScXMLEvent * ev = this->getCurrentEvent();
    if (ev->isOfType(SoScXMLEvent::getClassTypeId())) {
      const SoScXMLEvent * soev = static_cast<const SoScXMLEvent *>(ev);
      const SoEvent * coinev = soev->getSoEvent();

      if (strcmp(subkey, "getTime()") == 0) {
        SbTime timeval = coinev->getTime();
        double doubletime = timeval.getValue();
        PRIVATE(this)->varstring = SbStringConvert::toString(doubletime);
        return PRIVATE(this)->varstring.getString();
      }

      else if (strcmp(subkey, "getPosition().x") == 0) {
        SbVec2s pos = coinev->getPosition();
        PRIVATE(this)->varstring = SbStringConvert::toString(static_cast<double>(pos[0]));
        return PRIVATE(this)->varstring.getString();
      }
      else if (strcmp(subkey, "getPosition().y") == 0) {
        SbVec2s pos = coinev->getPosition();
        PRIVATE(this)->varstring = SbStringConvert::toString(static_cast<double>(pos[1]));
        return PRIVATE(this)->varstring.getString();
      }
      else if (strcmp(subkey, "getPosition()") == 0) {
        SbVec2s pos = coinev->getPosition();
        PRIVATE(this)->varstring = SbStringConvert::toString(pos);
        return PRIVATE(this)->varstring.getString();
      }

      else if (strcmp(subkey, "getNormalizedPosition().x") == 0) {
        SbVec2f pos = coinev->getNormalizedPosition(this->getViewportRegion());
        PRIVATE(this)->varstring = SbStringConvert::toString(static_cast<double>(pos[0]));
        return PRIVATE(this)->varstring.getString();
      }
      else if (strcmp(subkey, "getNormalizedPosition().y") == 0) {
        SbVec2f pos = coinev->getNormalizedPosition(this->getViewportRegion());
        PRIVATE(this)->varstring = SbStringConvert::toString(static_cast<double>(pos[1]));
        return PRIVATE(this)->varstring.getString();
      }
      else if (strcmp(subkey, "getNormalizedPosition()") == 0) {
        SbVec2f pos = coinev->getNormalizedPosition(this->getViewportRegion());
        PRIVATE(this)->varstring = SbStringConvert::toString(pos);
        return PRIVATE(this)->varstring.getString();
      }

      else if (strcmp(subkey, "wasShiftDown()") == 0) {
        SbBool wasdown = coinev->wasShiftDown();
        PRIVATE(this)->varstring = SbStringConvert::toString<bool>(wasdown);
        return PRIVATE(this)->varstring.getString();
      }

      else if (strcmp(subkey, "wasCtrlDown()") == 0) {
        SbBool wasdown = coinev->wasCtrlDown();
        PRIVATE(this)->varstring = SbStringConvert::toString<bool>(wasdown);
        return PRIVATE(this)->varstring.getString();
      }

      else if (strcmp(subkey, "wasAltDown()") == 0) {
        SbBool wasdown = coinev->wasAltDown();
        PRIVATE(this)->varstring = SbStringConvert::toString<bool>(wasdown);
        return PRIVATE(this)->varstring.getString();
      }

      else if (strcmp(subkey, "getState()") == 0 && coinev->isOfType(SoButtonEvent::getClassTypeId())) {
        const SoButtonEvent * bevent = coin_assert_cast<const SoButtonEvent *>(coinev);
        SbString enumname;
        SoButtonEvent::enumToString(bevent->getState(), enumname);
        PRIVATE(this)->varstring.sprintf("'%s'", enumname.getString());
        return PRIVATE(this)->varstring.getString();
      }

      else if (strcmp(subkey, "getKey()") == 0 && coinev->isOfType(SoKeyboardEvent::getClassTypeId())) {
        const SoKeyboardEvent * kbevent = coin_assert_cast<const SoKeyboardEvent *>(coinev);
        SbString enumname;
        SoKeyboardEvent::enumToString(kbevent->getKey(), enumname);
        PRIVATE(this)->varstring.sprintf("'%s'", enumname.getString());
        return PRIVATE(this)->varstring.getString();
      }

      else if (strcmp(subkey, "getPrintableCharacter()") == 0 && coinev->isOfType(SoKeyboardEvent::getClassTypeId())) {
        const SoKeyboardEvent * kbevent = coin_assert_cast<const SoKeyboardEvent *>(coinev);
        char printable = kbevent->getPrintableCharacter();
        PRIVATE(this)->varstring.sprintf("'%c'", printable);
        return PRIVATE(this)->varstring.getString();
      }

      else if (strcmp(subkey, "getButton()") == 0 && coinev->isOfType(SoMouseButtonEvent::getClassTypeId())) {
        const SoMouseButtonEvent * mbevent = coin_assert_cast<const SoMouseButtonEvent *>(coinev);
        SbString enumname;
        SoMouseButtonEvent::enumToString(mbevent->getButton(), enumname);
        PRIVATE(this)->varstring.sprintf("'%s'", enumname.getString());
        return PRIVATE(this)->varstring.getString();
      }

      else if (strcmp(subkey, "getButton()") == 0 && coinev->isOfType(SoSpaceballButtonEvent::getClassTypeId())) {
        const SoSpaceballButtonEvent * mbevent = coin_assert_cast<const SoSpaceballButtonEvent *>(coinev);
        SbString enumname;
        SoSpaceballButtonEvent::enumToString(mbevent->getButton(), enumname);
        PRIVATE(this)->varstring.sprintf("'%s'", enumname.getString());
        return PRIVATE(this)->varstring.getString();
      }

      // FIXME: x., .y, .z
      else if (strcmp(subkey, "getTranslation()") == 0 && coinev->isOfType(SoMotion3Event::getClassTypeId())) {
        const SoMotion3Event * m3event = coin_assert_cast<const SoMotion3Event *>(coinev);
        SbVec3f translation = m3event->getTranslation();
        PRIVATE(this)->varstring = SbStringConvert::toString(translation);
        return PRIVATE(this)->varstring.getString();
      }

      // FIXME: .angle, .axis
      else if (strcmp(subkey, "getRotation()") == 0 && coinev->isOfType(SoMotion3Event::getClassTypeId())) {
        const SoMotion3Event * m3event = coin_assert_cast<const SoMotion3Event *>(coinev);
        SbRotation rotation = m3event->getRotation();
        PRIVATE(this)->varstring = SbStringConvert::toString(rotation);
        return PRIVATE(this)->varstring.getString();
      }

      // FIXME: make this into a evaluator-level RayPick(SbVec2f) function instead
      else if (strcmp(key + 7, "pickposition3") == 0) {
        SbVec2s location2 = coinev->getPosition();
        SoRayPickAction rpa(this->getViewportRegion());
        rpa.setPoint(location2);
        rpa.apply(this->getSceneGraphRoot());
        SoPickedPoint * pp = rpa.getPickedPoint();
        if (pp) {
          SbVec3f pickpos = pp->getPoint();
          PRIVATE(this)->varstring = SbStringConvert::toString(pickpos);
        } else {
          PRIVATE(this)->varstring.sprintf("FALSE"); // need a valid undefined-value
        }
        return PRIVATE(this)->varstring.getString();
      }
    }
  }

  else if (strncmp(key, "coin:", 5) == 0) {
    const char * subkey = key + 5;
    if (strncmp(subkey, "camera.", 7) == 0) {
      SoCamera * camera = this->getActiveCamera();
      if (!camera) {
        SoDebugError::post("SoScXMLStateMachine::getVariable",
                           "queried for camera, but no camera is set.");
        return NULL;
      }
      const char * detail = subkey + 7;
      if (strcmp(detail, "getTypeId()") == 0) {
        PRIVATE(this)->varstring.sprintf("'%s'", camera->getTypeId().getName().getString());
        return PRIVATE(this)->varstring.getString();
      }
    }

    // get generic field access working and intercept for more So-specific stuff
    // coin:viewport
    // coin:camera
    // coin:scene
  }

  //else {
  //}

  // couldn't resolve the symbol - try parent class to get '_data' and other '_event'
  // locations resolved
  return inherited::getVariable(key);
}

#undef PRIVATE
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