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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/
*
*/
// -*- C++ -*-
/*
* Copyright (C) 1990,91 Silicon Graphics, Inc.
*
_______________________________________________________________________
______________ S I L I C O N G R A P H I C S I N C . ____________
|
| $Revision: 1.1.1.1 $
|
| Description:
| This file defines the SoSpotLight node class.
|
| Author(s) : Paul S. Strauss
|
______________ S I L I C O N G R A P H I C S I N C . ____________
_______________________________________________________________________
*/
#ifndef _SO_SPOT_LIGHT_
#define _SO_SPOT_LIGHT_
#include <Inventor/fields/SoSFVec3f.h>
#include <Inventor/nodes/SoLight.h>
//////////////////////////////////////////////////////////////////////////////
//
// Class: SoSpotLight
//
// Spot light source node. A spot light illuminates from a point in
// space along a primary direction. The illumination is within a cone
// whose angle is given by the cutOffAngle field. The intensity of
// the source may vary as the illumination direction diverges from
// the primary direction, as specified in the dropOffRate field.
//
//////////////////////////////////////////////////////////////////////////////
// C-api: prefix=SoSpotLt
// C-api: public=on, intensity, color
// C-api: public=location, direction, dropOffRate, cutOffAngle
class SoSpotLight : public SoLight {
SO_NODE_HEADER(SoSpotLight);
public:
// Fields (in addition to those in SoLight):
SoSFVec3f location; // Source location
SoSFVec3f direction; // Primary direction of illumination
SoSFFloat dropOffRate; // Rate of intensity drop-off from primary
// direction: 0 = constant intensity,
// 1 = sharp drop-off
SoSFFloat cutOffAngle; // Angle (in radians) outside of which
// intensity is zero, measured from
// edge of cone to other edge
// Constructor
SoSpotLight();
SoEXTENDER public:
// Creates a light source during rendering
virtual void GLRender(SoGLRenderAction *action);
SoINTERNAL public:
static void initClass();
protected:
virtual ~SoSpotLight();
};
#endif /* _SO_SPOT_LIGHT_ */
|
