00001 /********************************************************************* 00002 * lescegra * 00003 * * 00004 * http://geeky.kicks-ass.org/projects/lescegra.html * 00005 * * 00006 * Copyright 2003 by Enno Cramer <uebergeek@web.de> * 00007 * * 00008 * This library is free software; you can redistribute it and/or * 00009 * modify it under the terms of the GNU Library General Public * 00010 * License as published by the Free Software Foundation; either * 00011 * version 2 of the License, or (at your option) any later version. * 00012 * * 00013 * This library is distributed in the hope that it will be useful, * 00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of * 00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * 00016 * Library General Public License for more details. * 00017 * * 00018 * You should have received a copy of the GNU Library General Public * 00019 * License along with this library; if not, write to the Free * 00020 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * 00021 *********************************************************************/ 00022 00023 #ifndef LSG_FOG_H 00024 #define LSG_FOG_H 1 00025 00026 /** 00027 * \file fog.h 00028 * \brief Fog effect 00029 */ 00030 00031 #include <lescegra/sg/group.h> 00032 00033 enum LsgFogType { 00034 FOG_LINEAR, 00035 FOG_EXP, 00036 FOG_EXP2 00037 }; 00038 00039 /** 00040 * \ingroup scene 00041 * \brief Fog effect 00042 * 00043 * Node defining a fogging effect with color and fog function. 00044 */ 00045 typedef struct { 00046 LsgGroup super; 00047 int type; 00048 float color[4]; 00049 float start; 00050 float end; 00051 float density; 00052 } LsgFog; 00053 00054 LsgFog* LsgFog_create(enum LsgFogType type); 00055 void LsgFog_init(LsgFog* self, enum LsgFogType type); 00056 void LsgFog_display(LsgFog* self, LsgFrustum* frust); 00057 00058 #define LsgFog_clean(self) LsgGroup_clean(&(self)->super) 00059 #define LsgFog_update(self, now) LsgGroup_update(&(self)->super, now) 00060 #define LsgFog_destroy(self) LsgGroup_destroy(&(self)->super) 00061 00062 #endif