HoudiniRamp.h

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/*  Copyright (C) 2003-2021 Free Electron Organization
    Any use of this software requires a license.  If a valid license
    was not distributed with this file, visit freeelectron.org. */

/** @file */

#ifndef __houdini_HoudiniRamp_h__
#define __houdini_HoudiniRamp_h__

namespace fe
{
namespace ext
{

/**************************************************************************//**
    @brief Ramp in Houdini

    @ingroup houdini
*//***************************************************************************/
class FE_DL_EXPORT HoudiniRamp:
    public MetaRamp,
    public CastableAs<HoudiniRamp>
{
    public:
                    HoudiniRamp(void)                                       {}
virtual             ~HoudiniRamp(void)                                      {}

                    //* as RampI
virtual U32         entryCount(void) const
                    {   return m_ramp.getNodeCount(); }

virtual Vector2     entry(U32 a_index) const
                    {
                        const UT_ColorNode* pColorNode=m_ramp.getNode(a_index);
                        return Vector2(pColorNode->t,pColorNode->rgba.r);
                    }

virtual Real        eval(Real a_u) const
                    {
                        float values[4];
                        m_ramp.rampLookup(a_u,values);
                        return values[0];
                    }

        UT_Ramp&    nativeRamp(void)    { return m_ramp; }

    private:

        UT_Ramp     m_ramp;
};

} /* namespace ext */
} /* namespace fe */

#endif /* __houdini_HoudiniRamp_h__ */