packedsphere/GU_PackedSphere.h

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#ifndef __GU_PackedSphere__
#define __GU_PackedSphere__

#include <GU/GU_PackedImpl.h>

class GU_PrimPacked;

namespace HDK_Sample
{

/// Example of a simple packed primitive
///
/// The packed primitive created references a GU_Detail containing a polysoup
/// of a sphere.  The primitive has a single parameter:
/// - LOD @n
///   The level of detail (i.e. the level of refinement of the icosahedron)
///
/// Each sphere primitive shares its geometry with other spheres of the same LOD
class GU_PackedSphere : public GU_PackedImpl
{
public:
    GU_PackedSphere();
    GU_PackedSphere(const GU_PackedSphere &src);
    ~GU_PackedSphere() override;

    static void install(GA_PrimitiveFactory *factory);

    /// Get the type ID for the GU_PackedSphere primitive type.
    static const GA_PrimitiveTypeId &typeId()
    {
        return theTypeId;
    }

    /// @{
    /// Virtual interface from GU_PackedImpl interface
    GU_PackedFactory   *getFactory() const override;
    GU_PackedImpl      *copy() const override;
    void                clearData() override;

    bool                isValid() const override;
    bool                load(GU_PrimPacked *prim, const UT_Options &options,
                             const GA_LoadMap &) override
                        {
                            // Loading the sphere is simple, we can just update
                            // the parameters.
                            updateFrom(prim, options);
                            return true;
                        }
    bool                supportsJSONLoad() const override { return true; }
    bool                loadFromJSON(
                                GU_PrimPacked *prim,
                                const UT_JSONValueMap &options,
                                const GA_LoadMap &) override
                        {
                            updateFrom(prim, options);
                            return true;
                        }
    void                update(GU_PrimPacked *prim,
                               const UT_Options &options) override
                        {
                            updateFrom(prim, options);
                        }
    bool                save(UT_Options &options,
                             const GA_SaveMap &map) const override;
    bool                getBounds(UT_BoundingBox &box) const override;
    bool                getRenderingBounds(UT_BoundingBox &box) const override;
    void                getVelocityRange(
                                UT_Vector3 &min,
                                UT_Vector3 &max) const override;
    void                getWidthRange(fpreal &min, fpreal &max) const override;
    bool                unpack(GU_Detail &destgdp,
                               const UT_Matrix4D *transform) const override;
    GU_ConstDetailHandle getPackedDetail(
                                GU_PackedContext *context = 0) const override;

    /// Report memory usage (includes all shared memory)
    int64       getMemoryUsage(bool inclusive) const override;

    /// Count memory usage using a UT_MemoryCounter in order to count
    /// shared memory correctly.
    void        countMemory(UT_MemoryCounter &counter,
                            bool inclusive) const override;
    /// @}

    /// @{
    /// Member data accessors for intrinsics
    exint       lod() const { return myLOD; }
    exint       intrinsicLod(const GU_PrimPacked *prim) const { return lod(); }
    void        setLOD(GU_PrimPacked *prim, exint l);
    const GU_ConstDetailHandle  &detail() const         { return myDetail; }
    void        setDetail(const GU_ConstDetailHandle &h) { myDetail = h; }
    /// @}

protected:
    /// updateFrom() will update from either UT_Options or UT_JSONValueMap
    template <typename T>
    void        updateFrom(GU_PrimPacked *prim, const T &options);

private:
    void                        clearSphere();

    GU_ConstDetailHandle        myDetail;
    exint                       myLOD;

    static GA_PrimitiveTypeId theTypeId;
};

}       // End namespace

#endif