GAS/GAS_VelocityStretch.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.
 *
 * Produced by:
 *      Jeff Lait
 *      Side Effects Software Inc
 *      123 Front Street West, Suite 1401
 *      Toronto, Ontario
 *      Canada   M5J 2M2
 *      416-504-9876
 *
 * NAME:        GAS_VelocityStretch.h ( GAS Library, C++)
 *
 * COMMENTS:
 */

#ifndef __GAS_VelocityStretch__
#define __GAS_VelocityStretch__

#include "GAS_API.h"

#include <SIM/SIM_RawField.h>

#include "GAS_SubSolver.h"
#include "GAS_Utils.h"

class GAS_SPH;
class SIM_VectorField;
class SIM_ScalarField;
class SIM_MatrixField;

class GAS_API gas_VelInfo
{
public:
    const SIM_VectorField       *velocity;
    GAS_SPH             *sph;
    const GU_Detail     *gdp;
    fpreal               timestep;
};

class GAS_API GAS_VelocityStretch : public GAS_SubSolver
{
public:
    GET_DATA_FUNC_S(GAS_NAME_VELOCITY, VelocityName);
    GET_DATA_FUNC_S("vattrib", VelAttrib);

    GET_DATA_FUNC_S(GAS_NAME_FIELD, FieldName);
    GET_DATA_FUNC_S(GAS_NAME_GEOMETRY, GeometryName);
    GET_DATA_FUNC_S("attribs", Attributes);

    GET_DATA_FUNC_B("scalexforms", ScaleXforms);
    GET_DATA_FUNC_B("rotatexforms", RotateXforms);
    
    GET_DATA_FUNC_B(GAS_NAME_USETIMESTEP, UseTimeStep);
    GET_DATA_FUNC_F(GAS_NAME_TIMESCALE, TimeScale);

protected:
    explicit             GAS_VelocityStretch(const SIM_DataFactory *factory);
    virtual             ~GAS_VelocityStretch();

    /// Stretches the vorticle vorticities according to the velocity
    /// field
    virtual bool         solveGasSubclass(SIM_Engine &engine,
                                SIM_Object *obj,
                                SIM_Time time,
                                SIM_Time timestep);

    void                 stretchByVelocity(GU_Detail *vorticles,
                                    const gas_VelInfo &info);
    void                 stretchByVelocity(SIM_VectorField *field,
                                    const gas_VelInfo &info);
    void                 stretchByVelocity(SIM_MatrixField *field,
                                    const gas_VelInfo &info);

    THREADED_METHOD2(GAS_VelocityStretch, dst->shouldMultiThread(),
                        stretchScalarField,
                        SIM_RawField *, dst,
                        const gas_VelInfo &, velinfo)
    void                 stretchScalarFieldPartial(
                                SIM_RawField *dst,
                                const gas_VelInfo &velinfo,
                                const UT_JobInfo &info);

    THREADED_METHOD4(GAS_VelocityStretch, dst->shouldMultiThread(),
                        stretchVectorField,
                        SIM_RawField *, dst,
                        int, axis,
                        SIM_VectorField *, src,
                        const gas_VelInfo &, velinfo)
    void                 stretchVectorFieldPartial(
                                SIM_RawField *dst,
                                int axis,
                                const SIM_VectorField *src,
                                const gas_VelInfo &velinfo,
                                const UT_JobInfo &info);

    THREADED_METHOD5(GAS_VelocityStretch, dst->shouldMultiThread(),
                        stretchMatrixField,
                        SIM_RawField *, dst,
                        int, a1,
                        int, a2,
                        SIM_MatrixField *, src,
                        const gas_VelInfo &, velinfo)
    void                 stretchMatrixFieldPartial(
                                SIM_RawField *dst,
                                int a1, int a2,
                                const SIM_MatrixField *src,
                                const gas_VelInfo &velinfo,
                                const UT_JobInfo &info);

private:
    static const SIM_DopDescription     *getDopDescription();

    DECLARE_STANDARD_GETCASTTOTYPE();
    DECLARE_DATAFACTORY(GAS_VelocityStretch,
                        GAS_SubSolver,
                        "Gas Velocity Stretch",
                        getDopDescription());
};

#endif

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