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/**
* $Id$
*
* ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version. The Blender
* Foundation also sells licenses for use in proprietary software under
* the Blender License. See http://www.blender.org/BL/ for information
* about this.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL/BL DUAL LICENSE BLOCK *****
*/
#ifndef SHADOWBUFFER_H
#define SHADOWBUFFER_H
#ifdef __cplusplus
extern "C" {
#endif
#ifndef RE_SHADOWBUFFERHANDLE
#define RE_SHADOWBUFFERHANDLE
#define RE_DECLARE_HANDLE(name) typedef struct name##__ { int unused; } *name
RE_DECLARE_HANDLE(RE_ShadowBufferHandle);
#endif
struct ShadBuf;
struct LampRen;
/**
* Calculates shadowbuffers for a vector of shadow-giving lamps
* @param lar The vector of lamps
* @returns a handle to the buffer
*/
extern void RE_buildShadowBuffer(RE_ShadowBufferHandle dsbh,
struct LampRen *lar);
/**
* Determines the shadow factor for a face and lamp. There is some
* communication with global variables here? Should be made explicit...
* @param shadres The RGB shadow factors: 1.0 for no shadow, 0.0 for complete
* shadow. There must be a float[3] to write the result to.
* @param shb The shadowbuffer to find the shadow factor in.
* @param inp The inproduct between viewvector and ?
*
*/
void RE_testshadowbuf(RE_ShadowBufferHandle dsbh,
struct ShadBuf* shbp,
float inp,
float* shadres);
/**
* Determines a shadow factor for halo-shadows.
*/
#ifdef __cplusplus
}
#endif
#endif /* SHADOWBUFFER_H */
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