SIM/SIM_ForceVex.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
 */

#ifndef __SIM_ForceVex_h__
#define __SIM_ForceVex_h__

#include "SIM_API.h"
#include "SIM_Force.h"
#include "SIM_OptionsUser.h"

/// A simple drag force that opposes velocities in the normal direction.
class SIM_API SIM_ForceVex : public SIM_Force,
                              public SIM_OptionsUser
{
public:
    GETSET_DATA_FUNCS_S("vexscript", VexScript);
    /// Whether to sample by point, circle, or sphere.
    GETSET_DATA_FUNCS_I(SIM_NAME_SAMPLEMODE, SampleMode);

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

    /// Override the surface force calculation. The drag force opposes
    /// velocities.
    virtual void         getForceSubclass(const SIM_Object &object,
                                        const UT_Vector3 &position,
                                        const UT_Vector3 &velocity,
                                        const UT_Vector3 &angvel,
                                        const fpreal mass,
                                        UT_Vector3 &force,
                                        UT_Vector3 &torque) const;
    virtual bool         getForceSetSubclass(const SIM_Object &object,
                                        const UT_Vector3Array &positions,
                                        const UT_Vector3Array &velocities,
                                        const UT_Vector3Array &angvelocities,
                                        const UT_FloatArray &masses,
                                        UT_Vector3Array &forces,
                                        UT_Vector3Array &torques) const;

    virtual SIM_ForceSample     getOptimalForceSamplingSubclass() const;

private:
    /// Get the Automatic DOP description for creating a drag dop.
    static const SIM_DopDescription     *getForceVexDopDescription();

    DECLARE_STANDARD_GETCASTTOTYPE();
    DECLARE_DATAFACTORY(SIM_ForceVex,
                        SIM_Force,
                        "Vex Force",
                        getForceVexDopDescription());
};

#endif

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