CHOP_Blend.h

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/*
 * Copyright (c) 2024
 *      Side Effects Software Inc.  All rights reserved.
 *
 * Redistribution and use of Houdini Development Kit samples in source and
 * binary forms, with or without modification, are permitted provided that the
 * following conditions are met:
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. The name of Side Effects Software may not be used to endorse or
 *    promote products derived from this software without specific prior
 *    written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY SIDE EFFECTS SOFTWARE `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 SIDE EFFECTS SOFTWARE 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.
 *
 *----------------------------------------------------------------------------
 *     Blends inputs 2,3,4... using the weights in input 1.
 */

#ifndef __CHOP_Blend__
#define __CHOP_Blend__

#include <CHOP/CHOP_Node.h>
#include <UT/UT_VectorTypes.h>

#define  ARG_BLEND_DIFFERENCE   (myParmBase +0)
#define  ARG_BLEND_FIRST_WEIGHT (myParmBase +1)

namespace HDK_Sample {

class CHOP_Blend : public CHOP_Node
{
public:


    static OP_Node              *myConstructor(OP_Network*, const char *,
                                                            OP_Operator *);
    static OP_TemplatePair       myTemplatePair;
    static OP_VariablePair       myVariablePair;
    static PRM_Template          myTemplateList[];
    static CH_LocalVariable      myVariableList[];

    OP_ERROR                     cookMyChop(OP_Context &context) override;
    bool                         updateParmsFlags() override;

protected:

                                 CHOP_Blend(OP_Network   *net, 
                                             const char *name,
                                             OP_Operator *op);
                                ~CHOP_Blend() override;

private:

    int         GETDIFFERENCE()
                { return evalInt(ARG_BLEND_DIFFERENCE,0,0); }

    int         FIRST_WEIGHT()
                { return evalInt(ARG_BLEND_FIRST_WEIGHT,0,0); }
    
    int         findFirstAvailableTracks(OP_Context &context);
    int         findInputClips(OP_Context &context, const CL_Clip *blendclip);

    const CL_Clip                       *getCacheInputClip(int j);


    UT_IntArray                         myAvailableTracks;
    UT_FprealArray                      myTotalArray;
    UT_ValArray<const CL_Clip *>        myInputClip;

};

} // End HDK_Sample namespace
   
#endif