SoInterpolate.h

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/*
 *
 *  Copyright (C) 2000 Silicon Graphics, Inc.  All Rights Reserved. 
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  Further, this software is distributed without any warranty that it is
 *  free of the rightful claim of any third person regarding infringement
 *  or the like.  Any license provided herein, whether implied or
 *  otherwise, applies only to this software file.  Patent licenses, if
 *  any, provided herein do not apply to combinations of this program with
 *  other software, or any other product whatsoever.
 * 
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 *  Mountain View, CA  94043, or:
 * 
 *  http://www.sgi.com 
 * 
 *  For further information regarding this notice, see: 
 * 
 *  http://oss.sgi.com/projects/GenInfo/NoticeExplan/
 *
 */
 
 
/*
 * Copyright (C) 1990,91   Silicon Graphics, Inc.
 *
 _______________________________________________________________________
 ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
 |
 |   $Revision: 1.1.1.1 $
 |
 |   Description:
 |      This file defines the abstract SoInterpolate class and
 |      macros used to derive classes from it, as well as the
 |      derived classes themselves.
 |
 |   Macros:
 |      SO_INTERPOLATE_HEADER
 |      SO_INTERPOLATE_SOURCE
 |      SO_INTERPOLATE_INITCLASS
 |
 |   Classes:
 |      
 |      SoInterpolate   (abstract base class)
 |      SoInterpolateFloat
 |      SoInterpolateRotation
 |      SoInterpolateVec2f
 |      SoInterpolateVec3f
 |      SoInterpolateVec4f
 |
 |   Author(s)          : Ronen Barzel
 |
 ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
 _______________________________________________________________________
 */
 
#ifndef  _SO_INTERPOLATE_
#define  _SO_INTERPOLATE_
 
#include <Inventor/system/SbSystem.h>
#include <Inventor/SoDB.h>
#include <Inventor/engines/SoSubEngine.h>
#include <Inventor/fields/SoSFFloat.h>
#include <Inventor/fields/SoMFFloat.h>
#include <Inventor/fields/SoMFRotation.h>
#include <Inventor/fields/SoMFVec2f.h>
#include <Inventor/fields/SoMFVec3f.h>
#include <Inventor/fields/SoMFVec4f.h>
 
 
 
 
class INVENTOR_API SoInterpolate : public SoEngine {
 
    SO_ENGINE_ABSTRACT_HEADER(SoInterpolate);
 
  public:
 
 
    SoSFFloat           alpha;
 
 
 
 
    SoEngineOutput      output;
 
 
  SoINTERNAL public:
    static void         initClass();
    static void         initClasses();  
 
  protected:
    SoInterpolate();
    static int max(int a, int b) { return (a > b) ? a : b; }
    static int clamp(int i, int n) { return (i < n) ? i : n-1; }
 
    ~SoInterpolate();
};
 
 
 
#define SO_INTERPOLATE_HEADER(className)                                \
                                                                        \
    SO_ENGINE_HEADER(className);                                        \
                                                                        \
  private:                                                              \
    ~className();                                                       \
    virtual void        evaluate();                                     \
                                                                        \
  SoINTERNAL public:                                                    \
    static void         initClass();                                    \
                                                                        \
  public:                                                               \
    className()
 
 
#define SO_INTERPOLATE_SOURCE(className, type,                          \
                        valType, defaultVal0, defaultVal1, interpVal)   \
                                                                        \
SO_ENGINE_SOURCE(className);                                            \
                                                                        \
className::className()                                                  \
{                                                                       \
    SO_ENGINE_CONSTRUCTOR(className);                                   \
    SO_ENGINE_ADD_INPUT(alpha, (0.0));                                  \
    SO_ENGINE_ADD_INPUT(input0, defaultVal0);                           \
    SO_ENGINE_ADD_INPUT(input1, defaultVal1);                           \
    SO_ENGINE_ADD_OUTPUT(output, type);                                 \
    isBuiltIn = TRUE;                                                   \
}                                                                       \
                                                                        \
className::~className()                                                 \
{                                                                       \
}                                                                       \
                                                                        \
void                                                                    \
className::evaluate()                                                   \
{                                                                       \
    int n0 = input0.getNum();                                           \
    int n1 = input1.getNum();                                           \
    float a = alpha.getValue();                                         \
    for (int i=max(n0,n1)-1; i>=0; i--) {                               \
        valType v0 = input0[clamp(i,n0)];                               \
        valType v1 = input1[clamp(i,n1)];                               \
        SO_ENGINE_OUTPUT(output, type, set1Value(i, interpVal));        \
    }                                                                   \
}
 
 
#define SO_INTERPOLATE_INITCLASS(className, classPrintName)             \
                                                                        \
void                                                                    \
className::initClass()                                                  \
{                                                                       \
    SO__ENGINE_INIT_CLASS(className, classPrintName, SoInterpolate);    \
}
 
 
 
class INVENTOR_API SoInterpolateFloat : public SoInterpolate {
    SO_INTERPOLATE_HEADER(SoInterpolateFloat);
public:
 
 
    SoMFFloat           input0;
 
    SoMFFloat           input1;
 
 
};
 
 
 
class INVENTOR_API SoInterpolateRotation : public SoInterpolate {
    SO_INTERPOLATE_HEADER(SoInterpolateRotation);
public:
 
 
    SoMFRotation        input0;
 
    SoMFRotation        input1;
 
 
};
 
 
 
class INVENTOR_API SoInterpolateVec2f : public SoInterpolate {
    SO_INTERPOLATE_HEADER(SoInterpolateVec2f);
public:
 
 
    SoMFVec2f           input0;
 
    SoMFVec2f           input1;
 
 
};
 
 
 
class INVENTOR_API SoInterpolateVec3f : public SoInterpolate {
    SO_INTERPOLATE_HEADER(SoInterpolateVec3f);
public:
 
 
    SoMFVec3f           input0;
 
    SoMFVec3f           input1;
 
 
};
 
 
 
class INVENTOR_API SoInterpolateVec4f : public SoInterpolate {
    SO_INTERPOLATE_HEADER(SoInterpolateVec4f);
public:
 
 
    SoMFVec4f           input0;
 
    SoMFVec4f           input1;
 
 
};
 
#endif /* _SO_INTERPOLATE_ */