/**************************************************************************\
 * Copyright (c) Kongsberg Oil & Gas Technologies AS
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 
 * Neither the name of the copyright holder nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\**************************************************************************/

#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
