SoCalculator.h

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#ifndef COIN_SOCALCULATOR_H
#define COIN_SOCALCULATOR_H

#include <Inventor/engines/SoSubEngine.h>
#include <Inventor/engines/SoEngineOutput.h>
#include <Inventor/fields/SoMFFloat.h>
#include <Inventor/fields/SoMFVec3f.h>
#include <Inventor/fields/SoMFString.h>
#include <Inventor/lists/SbList.h>

class SoCalculatorP;

class COIN_DLL_API SoCalculator : public SoEngine {
  typedef SoEngine inherited;

  SO_ENGINE_HEADER(SoCalculator);

public:
  // inputs
  SoMFFloat a, b, c, d, e, f, g, h;
  SoMFVec3f A, B, C, D, E, F, G, H;
  SoMFString expression;

  // outputs
  SoEngineOutput oa, ob, oc, od; // (SoMFFloat)
  SoEngineOutput oA, oB, oC, oD; // (SoMFVec3f)

  SoCalculator(void);

  static void initClass(void);

protected:
  virtual ~SoCalculator(void);

  virtual void inputChanged(SoField * which);

private:
  virtual void evaluate(void);

  static void readfieldcb(const char *name, float *data, void *cbdata);
  static void writefieldcb(const char *name, float *data, int comp, void *cbdata);

  void evaluateExpression(struct so_eval_node *node, const int fieldidx);
  void findUsed(struct so_eval_node *node, char *inused, char *outused);

  SoCalculatorP * pimpl;
};

#endif // !COIN_SOCALCULATOR_H