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SoCalculator.h

00001 /**************************************************************************\
00002  *
00003  *  This file is part of the Coin 3D visualization library.
00004  *  Copyright (C) 1998-2002 by Systems in Motion. All rights reserved.
00005  *
00006  *  This library is free software; you can redistribute it and/or
00007  *  modify it under the terms of the GNU Lesser General Public License
00008  *  version 2.1 as published by the Free Software Foundation. See the
00009  *  file LICENSE.LGPL at the root directory of the distribution for
00010  *  more details.
00011  *
00012  *  If you want to use Coin for applications not compatible with the
00013  *  LGPL, please contact SIM to acquire a Professional Edition license.
00014  *
00015  *  Systems in Motion, Prof Brochs gate 6, 7030 Trondheim, NORWAY
00016  *  http://www.sim.no support@sim.no Voice: +47 22114160 Fax: +47 22207097
00017  *
00018 \**************************************************************************/
00019 
00020 #ifndef COIN_SOCALCULATOR_H
00021 #define COIN_SOCALCULATOR_H
00022 
00023 #include <Inventor/engines/SoSubEngine.h>
00024 #include <Inventor/engines/SoEngineOutput.h>
00025 #include <Inventor/fields/SoMFFloat.h>
00026 #include <Inventor/fields/SoMFVec3f.h>
00027 #include <Inventor/fields/SoMFString.h>
00028 #include <Inventor/lists/SbList.h>
00029 
00030 struct so_eval_node;
00031 
00032 class COIN_DLL_API SoCalculator : public SoEngine {
00033   typedef SoEngine inherited;
00034 
00035   SO_ENGINE_HEADER(SoCalculator);
00036 
00037 public:
00038   // inputs
00039   SoMFFloat a, b, c, d, e, f, g, h;
00040   SoMFVec3f A, B, C, D, E, F, G, H;
00041   SoMFString expression;
00042 
00043   // outputs
00044   SoEngineOutput oa, ob, oc, od; // (SoMFFloat)
00045   SoEngineOutput oA, oB, oC, oD; // (SoMFVec3f)
00046 
00047   SoCalculator(void);
00048 
00049   static void initClass(void);
00050 
00051 protected:
00052   ~SoCalculator(void);
00053 
00054   virtual void inputChanged(SoField * which);
00055 
00056 private:
00057   virtual void evaluate(void);
00058   SbList <struct so_eval_node*> evaluatorList;
00059 
00060   static void readfieldcb(const char *name, float *data, void *cbdata);
00061   static void writefieldcb(const char *name, float *data, int comp, void *cbdata);
00062 
00063   void evaluateExpression(struct so_eval_node *node, const int fieldidx);
00064   void findUsed(struct so_eval_node *node, char *inused, char *outused);
00065 
00066   float ta_th[8];
00067   SbVec3f tA_tH[8];
00068 
00069   float a_h[8];
00070   SbVec3f A_H[8];
00071   float oa_od[4];
00072   SbVec3f oA_oD[4];
00073 };
00074 
00075 #endif // !COIN_SOCALCULATOR_H

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