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/*
*
* Copyright (C) 2000 Silicon Graphics, Inc. All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/NoticeExplan/
*
*/
////////////////////////////////////////////////////////////////////////
//
// Description:
// This is the include file for the SoSpotLightDragger.
// This is a composite dragger which allows independent rotation,
// translation, and beam spread editting of a spot light.
//
// It is composed of an SoRotateSphericalDragger (for rotation),
// an SoDragPointDragger (for translation), and it creates its own projector
// handles mouse events for doing it's own dragging of the beam angle.
//
// The beam is editted by behaving like an SoRotateDiscDragger, but the
// plane of the disc is re-defined every time a drag is initiated.
// The plane always passes through the z axis and the selected point.
// When the rotation angle is determined, however, the beam is not rotated,
// but scaled so it looks like an opening or closing umbrella. This is done
// by scaling evenly in x and y, and a different amount in z, so the distance
// between the selected point and the origin remains constant.
//
// NOTE TO DEVELOPERS:
// For info about the structure of SoSpotLightDragger:
// [1] compile: /usr/share/src/Inventor/samples/ivNodeKitStructure
// [2] type: ivNodeKitStructure SoSpotLightDragger.
// [3] The program prints a diagram of the scene graph and a table with
// information about each part.
//
//
// The following parts in this dragger are created at construction time.
// 'ResourceName' corresponds to the name of the default geometry for the
// part. The dragger's constructor gets the scene graph for 'ResourceName'
// by querying the global dictionary ( SoDB::getByName("ResourceName"); ).
//
// Resource Name: Part Name:
//
// spotLightOverallMaterial - material
//
// spotLightTranslatorLineTranslator -
// - translator.xTranslator.translator
// - translator.yTranslator.translator
// - translator.zTranslator.translator
// spotLightTranslatorLineTranslatorActive -
// - translator.xTranslator.translatorActive
// - translator.yTranslator.translatorActive
// - translator.zTranslator.translatorActive
//
// spotLightTranslatorPlaneTranslator-
// - translator.yzTranslator.translator
// - translator.xzTranslator.translator
// - translator.xyTranslator.translator
// spotLightTranslatorPlaneTranslatorActive -
// - translator.yzTranslator.translatorActive
// - translator.xzTranslator.translatorActive
// - translator.xyTranslator.translatorActive
//
// spotLightRotatorRotator - rotator.rotator
// spotLightRotatorRotatorActive - rotator.rotatorActive
// spotLightRotatorFeedback - rotator.feedback
// spotLightRotatorFeedbackActive - rotator.feedbackActive
//
// spotLightBeam - beam
// spotLightBeamActive - beamActive
//
// NOTE: This is a translation node that
// moves the beam origin relative
// to the rest of the dragger.
// spotLightBeamPlacement - beamPlacement
//
////////////////////////////////////////////////////////////////////////
#ifndef _SO_SPOT_LIGHT_DRAGGER_
#define _SO_SPOT_LIGHT_DRAGGER_
#include <Inventor/SbLinear.h>
#include <Inventor/draggers/SoDragger.h>
#include <Inventor/fields/SoSFVec3f.h>
#include <Inventor/fields/SoSFFloat.h>
#include <Inventor/fields/SoSFRotation.h>
#include <Inventor/sensors/SoSensor.h>
class SoFieldSensor;
class SbPlaneProjector;
// C-api: prefix=SoSpotLtDrag
// C-api: public=rotation,translation,angle
class SoSpotLightDragger : public SoDragger
{
SO_KIT_HEADER(SoSpotLightDragger);
// This gives the dragger an overall material. It is edited by lightManips
// to make its dragger match the color of the light. Any materials within
// other parts will override this one.
SO_KIT_CATALOG_ENTRY_HEADER(material);
// The translator is kept under a separator along with a
// rotation that is maintained as the inverse to the rotation of the
// light. This means that using the rotator does not rotate the
// coordinate system that we translate the base of the dragger in.
SO_KIT_CATALOG_ENTRY_HEADER(translatorSep);
SO_KIT_CATALOG_ENTRY_HEADER(translatorRotInv);
SO_KIT_CATALOG_ENTRY_HEADER(translator);
SO_KIT_CATALOG_ENTRY_HEADER(rotator);
// Beneath a separator, the beamPlacement part places the beam's local
// space relative to the other parts.
// The beamSwitch is flipped when the beam is dragged.
SO_KIT_CATALOG_ENTRY_HEADER(beamSep);
SO_KIT_CATALOG_ENTRY_HEADER(beamPlacement);
SO_KIT_CATALOG_ENTRY_HEADER(beamScale);
SO_KIT_CATALOG_ENTRY_HEADER(beamSwitch);
SO_KIT_CATALOG_ENTRY_HEADER(beam);
SO_KIT_CATALOG_ENTRY_HEADER(beamActive);
public:
// Constructors
SoSpotLightDragger();
SoSFRotation rotation;
SoSFVec3f translation;
SoSFFloat angle;
SoINTERNAL public:
static void initClass(); // Initialize the class.
protected:
SbPlaneProjector *planeProj; // used during interaciton with beam
static void startCB( void *, SoDragger * );
static void motionCB( void *, SoDragger * );
static void doneCB( void *, SoDragger * );
void dragStart();
void drag();
void dragFinish();
SoFieldSensor *rotFieldSensor;
SoFieldSensor *translFieldSensor;
SoFieldSensor *angleFieldSensor;
static void fieldSensorCB( void *, SoSensor * );
static void valueChangedCB( void *, SoDragger * );
// Returns scaleFactor for beamScale part to display beamAngle.
void setBeamScaleFromAngle(float beamAngle);
// detach/attach any sensors, callbacks, and/or field connections.
// Also set geometry of childDraggers to be our default instead of their
// regular default, using our resources.
// Called by: start/end of SoBaseKit::readInstance
// and on new copy by: start/end of SoBaseKit::copy.
// Classes that redefine must call setUpConnections(TRUE,TRUE)
// at end of constructor.
// Returns the state of the node when this was called.
virtual SbBool setUpConnections( SbBool onOff, SbBool doItAlways = FALSE );
virtual void setDefaultOnNonWritingFields();
virtual ~SoSpotLightDragger();
private:
static const unsigned char geomBuffer[];
};
#endif /* _SO_SPOT_LIGHT_DRAGGER_ */
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