00001 /*======================================================================= 00002 * Copyright 1991-1996, Silicon Graphics, Inc. 00003 * ALL RIGHTS RESERVED 00004 * 00005 * UNPUBLISHED -- Rights reserved under the copyright laws of the United 00006 * States. Use of a copyright notice is precautionary only and does not 00007 * imply publication or disclosure. 00008 * 00009 * U.S. GOVERNMENT RESTRICTED RIGHTS LEGEND: 00010 * Use, duplication or disclosure by the Government is subject to restrictions 00011 * as set forth in FAR 52.227.19(c)(2) or subparagraph (c)(1)(ii) of the Rights 00012 * in Technical Data and Computer Software clause at DFARS 252.227-7013 and/or 00013 * in similar or successor clauses in the FAR, or the DOD or NASA FAR 00014 * Supplement. Contractor/manufacturer is Silicon Graphics, Inc., 00015 * 2011 N. Shoreline Blvd. Mountain View, CA 94039-7311. 00016 * 00017 * THE CONTENT OF THIS WORK CONTAINS CONFIDENTIAL AND PROPRIETARY 00018 * INFORMATION OF SILICON GRAPHICS, INC. ANY DUPLICATION, MODIFICATION, 00019 * DISTRIBUTION, OR DISCLOSURE IN ANY FORM, IN WHOLE, OR IN PART, IS STRICTLY 00020 * PROHIBITED WITHOUT THE PRIOR EXPRESS WRITTEN PERMISSION OF SILICON 00021 * GRAPHICS, INC. 00022 **=======================================================================*/ 00023 /*======================================================================= 00024 ** Author : Paul S. Strauss (MMM yyyy) 00025 **=======================================================================*/ 00026 /*======================================================================= 00027 *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.), *** 00028 *** AND IS DISTRIBUTED UNDER A LICENSE AGREEMENT. *** 00029 *** *** 00030 *** REPRODUCTION, DISCLOSURE, OR USE, IN WHOLE OR IN PART, OTHER THAN AS *** 00031 *** SPECIFIED IN THE LICENSE ARE NOT TO BE UNDERTAKEN EXCEPT WITH PRIOR *** 00032 *** WRITTEN AUTHORIZATION OF FEI S.A.S. *** 00033 *** *** 00034 *** RESTRICTED RIGHTS LEGEND *** 00035 *** USE, DUPLICATION, OR DISCLOSURE BY THE GOVERNMENT OF THE CONTENT OF THIS *** 00036 *** WORK OR RELATED DOCUMENTATION IS SUBJECT TO RESTRICTIONS AS SET FORTH IN *** 00037 *** SUBPARAGRAPH (C)(1) OF THE COMMERCIAL COMPUTER SOFTWARE RESTRICTED RIGHT *** 00038 *** CLAUSE AT FAR 52.227-19 OR SUBPARAGRAPH (C)(1)(II) OF THE RIGHTS IN *** 00039 *** TECHNICAL DATA AND COMPUTER SOFTWARE CLAUSE AT DFARS 52.227-7013. *** 00040 *** *** 00041 *** COPYRIGHT (C) 1996-2021 BY FEI S.A.S, *** 00042 *** BORDEAUX, FRANCE *** 00043 *** ALL RIGHTS RESERVED *** 00044 **=======================================================================*/ 00045 /*======================================================================= 00046 ** Modified by : VSG (MMM YYYY) 00047 **=======================================================================*/ 00048 00049 00050 #ifndef _SO_ENVIRONMENT_ 00051 #define _SO_ENVIRONMENT_ 00052 00053 #include <Inventor/fields/SoSFBool.h> 00054 #include <Inventor/fields/SoSFColor.h> 00055 #include <Inventor/fields/SoSFEnum.h> 00056 #include <Inventor/fields/SoSFFloat.h> 00057 #include <Inventor/fields/SoSFVec3f.h> 00058 #include <Inventor/fields/SoSFBool.h> 00059 #include <Inventor/nodes/SoNode.h> 00060 00062 // 00063 // Class: SoEnvironment 00064 // 00065 // Node that describes global environmental attributes such as 00066 // ambient lighting, light attenuation, and fog. 00067 // 00068 // Ambient lighting is the amount of extra light impinging on each 00069 // surface point when computing Phong lighting. 00070 // 00071 // Light attenuation affects all subsequent lights in a scene. It is 00072 // a quadratic function of distance from a light source to a surface 00073 // point. The three coefficients are specified in the attenuation 00074 // field. Attenuation works only for light sources with a fixed 00075 // location, such as point and spot lights. 00076 // 00077 // Fog has one of four types, each of which blends each surface point 00078 // with the specified fog color. Each type interprets the visibility 00079 // field to be the distance at which fog totally obscures objects. A 00080 // visibility value of 0 (the default) causes the SoEnvironment node 00081 // to set up fog so that the visibility is the distance to the far 00082 // clipping plane of the current camera. 00083 // 00084 // Note that this node has effect only during rendering, and that it 00085 // does not inherit field values from other SoEnvironment nodes. 00086 // 00088 00163 class SoEnvironment : public SoNode { 00164 00165 SO_NODE_HEADER(SoEnvironment); 00166 00167 public: 00169 enum FogType { 00173 NONE, 00177 HAZE, 00181 FOG, 00185 SMOKE 00186 }; 00187 00188 // Fields 00189 00194 SoSFFloat ambientIntensity; 00199 SoSFColor ambientColor; 00200 00211 SoSFVec3f attenuation; 00212 00223 SoSFBool ambientOcclusion; 00224 00236 SoSFFloat ambientOcclusionIntensity; 00237 00249 SoSFFloat ambientOcclusionRadius; 00250 00255 SoSFEnum fogType; 00259 SoSFColor fogColor; 00266 SoSFFloat fogStart; 00273 SoSFFloat fogVisibility; 00274 00278 SoEnvironment(); 00279 00284 inline virtual void setOverride(const SbBool state) 00285 { override.setValue(state); } 00286 00290 inline virtual SbBool isOverride() const 00291 { return override.getValue(); } 00292 00293 private: 00294 // Only rendering is implemented, since this node has no other effects 00295 virtual void GLRender(SoGLRenderAction *action); 00296 virtual void callback(SoCallbackAction *action); 00297 virtual void doAction(SoAction *action); 00298 00299 private: 00300 static void initClass(); 00301 static void exitClass(); 00302 00303 SoSFBool override; 00304 00305 private: 00306 virtual ~SoEnvironment(); 00307 00308 }; 00309 00310 #endif /* _SO_ENVIRONMENT_ */ 00311 00312