RAY_DemoSprite.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.
 *
 *----------------------------------------------------------------------------
 * This is a sample procedural DSO which creates sprites on point geometry.
 */

#ifndef __RAY_DemoSprite__
#define __RAY_DemoSprite__

#include <RAY/RAY_Procedural.h>
#include <GU/GU_Detail.h>
#include <UT/UT_BoundingBox.h>
#include <UT/UT_IntArray.h>

namespace HDK_Sample {

class ray_SpriteAttribMap;

class RAY_DemoSpriteParms {
public:
    // Data which is uniform for all splits
    const GU_Detail             *myGdp;
    GA_ROHandleV3                myVelH;
    GA_ROHandleV2                mySpriteScaleH;
    GA_ROHandleF                 mySpriteRotH;
    GA_ROHandleS                 mySpriteShopH;
    GA_ROHandleV3                mySpriteTexH;
    int                          myChunkSize;
    int                          mySpriteLimit;
    float                        myTimeScale;
    int                          myRefCount;
    UT_Matrix3                   myViewRotation;
    ray_SpriteAttribMap *myAttribMap;
};

class RAY_DemoSprite : public RAY_Procedural {
public:
             RAY_DemoSprite();
            ~RAY_DemoSprite() override;

    const char          *className() const override;
    int                  initialize(const UT_BoundingBox *box) override;
    int                  initChild(RAY_DemoSprite *sprite,
                                    const UT_BoundingBox &box);
    void                 getBoundingBox(UT_BoundingBox &box) override;
    void                 render() override;

private:
    const GU_Detail     *getPointGdp() const    { return myParms->myGdp; }
    fpreal               getTime() const        { return myParms->myTimeScale; }
    int                  getChunk() const       { return myParms->myChunkSize; }

    RAY_DemoSpriteParms *myParms;

    // Data which is unique per procedural
    UT_BoundingBox       myBox;
    UT_BoundingBox       myVelBox;
    UT_IntArray          myPointList;
};

}       // End HDK_Sample namespace

#endif