GEO/GEO_Rolloff.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * Produced by:
 *      Cristin Barghiel
 *      Side Effects
 *      477 Richmond Street West
 *      Toronto, Ontario
 *      Canada   M5V 3E7
 *      416-504-9876
 *
 * NAME:        GEO Library (C++)
 *
 * COMMENTS:  Rolloff class for proportional modeling
 *             
 */

#ifndef __GEO_Rolloff_h__
#define __GEO_Rolloff_h__

#include "GEO_API.h"
// This must match PRM_Shared::prmSoftTypes in order...

enum GEO_RolloffType {
    GEO_ROLLOFF_LINEAR,
    GEO_ROLLOFF_QUADRATIC,
    GEO_ROLLOFF_SMOOTH,
    GEO_ROLLOFF_META
};

class TS_MetaKernel;


class GEO_API GEO_Rolloff
{
public:
    GEO_Rolloff(GEO_RolloffType t = GEO_ROLLOFF_SMOOTH,
                float r = 1.0f, bool c = true, 
                float tdeg0 = 0.0f, float tdeg1 = 0.0f,
                TS_MetaKernel *kernel = 0);

      // Not all rolloff functions require a fsqrted distance, so
      // avoid it if necessary.
      float     apply(float dist2, bool normalize = true) const;

      void      radius(float r)         { 
                                          myRadius  = (r >= 0.0f ? r : 0.0f); 
                                          myRadius2 = myRadius * myRadius;
                                        }
      float     radius(void) const      { return myRadius; }
      float     radius2(void) const     { return myRadius2; }

      void      connected(bool c)       { myConnected = c;    }
      bool      connected(void) const   { return myConnected; }

      void      type(GEO_RolloffType t) { myType = t; }


private:
    GEO_RolloffType     myType;
    float               myRadius; // normalized 
    float               myRadius2;  // myRadius squared cached for speed
    bool                myConnected;

    float               myTanRad0;      // Angle of tangent slope
    float               myTanRad1;      
    TS_MetaKernel       *myKernel;      // My meta kernel
};

#endif

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