GU_PrimVolume.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.
 *
 * NAME:        GU_PrimVolume.h ( GU Library, C++)
 *
 * COMMENTS:
 */

#ifndef __GU_PrimVolume__
#define __GU_PrimVolume__

#include "GU_API.h"

#include <GEO/GEO_PrimVolume.h>
#include <UT/UT_ThreadedAlgorithm.h>

#include "GU_Detail.h"

class GEO_ConvertParms;
class GU_PrimVolumeCache;
class GU_PrimVolumeCacheParms;
class IMX_Layer;
class UT_MemoryCounter;

class GU_API GU_PrimVolume: public GEO_PrimVolume
{
protected:
    /// NOTE: Primitives should not be deleted directly.  They are managed
    ///       by the GA_PrimitiveList and the stash.
    ~GU_PrimVolume() override {}

public:
    /// NOTE: This constructor should only be called via GU_PrimitiveFactory.
    GU_PrimVolume(GU_Detail *gdp, GA_Offset offset=GA_INVALID_OFFSET)
        : GEO_PrimVolume(gdp, offset)
    {}

    const GA_PrimitiveDefinition &getTypeDef() const override
    {
        UT_ASSERT(theDefinition);
        return *theDefinition;
    }

    /// Report approximate memory usage.
    int64 getMemoryUsage() const override;

    /// Count memory usage using a UT_MemoryCounter in order to count
    /// shared memory correctly.
    /// NOTE: This should always include sizeof(*this).
    void countMemory(UT_MemoryCounter &counter) const override;

    // Conversion Methods
    GEO_Primitive       *convert(GEO_ConvertParms &parms,
                                 GA_PointGroup *usedpts = 0) override;
    GEO_Primitive       *convertNew(GEO_ConvertParms &parms) override;

    void                 normal(NormalComp &output) const override {}
    void                 normal(NormalCompD &output) const override {}

    // NOTE:  For static member functions please call in the following
    //        manner.  <ptrvalue> = GU_PrimSphere::<functname>
    //        i.e.      sphereptr = GU_PrimSphere::sphereBuild(params...);

    // Optional Build Method 
    static GEO_PrimVolume       *build(GU_Detail *gdp, bool integers = false,
                                       int comps = 1);

    // Builds a GU_PrimVolume attached to the given gdp with values
    // initialized from the callback function.  This is intentionally similar
    // to the GU_Detail::polyIsoSurface method.
    // Note that sampling is done at centers of voxels!
    static GEO_PrimVolume       *buildFromFunction(GU_Detail *gdp, 
                                    float (*valAtPoint)(const UT_Vector3 &,
                                                        void *data),
                                    void *data,
                                    const UT_BoundingBox &bbox,
                                    int xres, int yres, int zres);

    // Builds a two-dimensional GU_PrimVolume attached to the given gdp from the
    // provided layer.
    static GEO_PrimVolume       *buildFromLayer(GU_Detail *gdp,
                                    const IMX_Layer& layer);

    // A threadable version.  This should be preferred as you can
    // avoid using static data for callbacks.
    // The jobinfo you receive can be queried to find how many
    // threads and which one you are being called from.
    // Setting allowthreading to false avoids threading.
    static GEO_PrimVolume       *buildFromFunction(GU_Detail *gdp, 
                                    float (*valAtPoint)(const UT_Vector3 &,
                                                        void *,
                                                        const UT_JobInfo &),
                                    void *data,
                                    const UT_BoundingBox &bbox,
                                    int xres, int yres, int zres,
                                    bool allowthreading = true);

    typedef float (*VolumeSampler)(const UT_Vector3 &, void *, const UT_JobInfo &);
protected:

    THREADED_METHOD5(GU_PrimVolume, vox->numTiles() > 1,
                buildFromFunctionInternal,
                UT_VoxelArrayF *, vox,
                const UT_Matrix3 &, xform,
                const UT_Vector3 &, center,
                VolumeSampler, valAtPoint,
                void *, data)

    void        buildFromFunctionInternalPartial(UT_VoxelArrayF *vox, 
                            const UT_Matrix3 &xform, 
                            const UT_Vector3 &center, 
                            VolumeSampler valAtPoint,
                            void *data, 
                            const UT_JobInfo &info);

private:
    static GA_PrimitiveDefinition       *theDefinition;
    friend class                         GU_PrimitiveFactory;

// Don't warn about overriding deprecated virtual methods
SYS_DEPRECATED_PUSH_DISABLE()
};
SYS_DEPRECATED_POP_DISABLE()

#endif