GAS/GAS_EnforceBoundary.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_EnforceBoundary.h ( GAS Library, C++)
 *
 * COMMENTS:
 */

#ifndef __GAS_EnforceBoundary__
#define __GAS_EnforceBoundary__

#include "GAS_API.h"

#include <UT/UT_ThreadedAlgorithm.h>
#include <GU/GU_Detail.h>

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

class GU_Detail;
class SIM_VectorField;
class SIM_IndexField;

class GAS_API GAS_EnforceBoundary : public GAS_SubSolver
{
public:
    GET_DATA_FUNC_S(GAS_NAME_FIELD, FieldName);
    GET_DATA_FUNC_S(GAS_NAME_COLLISION, CollisionName);
    GET_DATA_FUNC_S(GAS_NAME_COLLISIONVALUE, CollisionValueName);
    GET_DATA_FUNC_B("velocityenforce", VelocityEnforce);
    GET_DATA_FUNC_I("veltype", VelocityType);
    GET_DATA_FUNC_B("usephysparms", UsePhysParms);
    GET_DATA_FUNC_B("forbidinterference", ForbidInterference);

    /// Returns the friction of the system at the given world position.
    void                 calculatePhysParms(const UT_Vector3 &pos,
                                    fpreal &bounce, 
                                    fpreal &friction, fpreal &dynfriction);

    /// Returns the velocity of the collision object at the given
    /// world pos
    UT_Vector3           calculateVelocity(const UT_Vector3 &pos);

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

    /// Moves the fields given by FieldName by the given velocity
    /// field.  Moves the points given by GeometryName likewise.
    virtual bool         solveGasSubclass(SIM_Engine &engine,
                                SIM_Object *obj,
                                SIM_Time time,
                                SIM_Time timestep);

    void                 enforceVelBoundary(SIM_Engine &engine,
                                    SIM_Object *obj,
                                    SIM_VectorField *vectorfield,
                                    SIM_ScalarField *collision,
                                    SIM_IndexField *colindexfield);

private:
    static const SIM_DopDescription     *getDopDescription();

    bool                 myUsePhysParms;
    SIM_Object          *myObject;
    SIM_Engine          *myEngine;
    SIM_IndexField      *myCollisionIndex;
    bool                 myVelUseSDF, myVelUsePoint;

    DECLARE_STANDARD_GETCASTTOTYPE();
    DECLARE_DATAFACTORY(GAS_EnforceBoundary,
                        GAS_SubSolver,
                        "Gas Enforce Boundary",
                        getDopDescription());
};

#endif

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