/******************************************************************************
 * Copyright 2020 NVIDIA Corporation. All rights reserved.
 *****************************************************************************/
/// \file
/// \brief Base class representing clock pulses and time mapping vor time varying data.

#ifndef NVIDIA_INDEX_ITIME_MAPPING_H
#define NVIDIA_INDEX_ITIME_MAPPING_H

#include <mi/base/interface_declare.h>
#include <mi/dice.h>

#include <mi/base/types.h>

#include <nv/index/iattribute.h>

namespace nv
{
namespace index
{

/// The interface class \c IClock_pulse_generator generates the time for playing animations.
///
/// The user has the ability to specify and implement a custom clock pulse generator to steer the
/// time-dependent visualization of large-scale data.
///
/// \ingroup nv_index_scene_description_attribute
///
class IClock_pulse_generator :
        public mi::base::Interface_declare<0xaaf6c278,0xf36f,0x4d00,0x83,0xd6,0xff,0x9e,0x4a,0xb3,0x2d,0x57>
{
public:
    /// The point in time.
    ///
    /// \return     Returns the absolute point in time defined within the set interval.
    ///
    virtual mi::Float64 get_tick() = 0;

    /// The start point of the time internal in which a time-dependent visualization is defined.
    ///
    /// \return     Returns the start time of the time interval.
    ///
    virtual mi::Float64 get_start() const = 0;

    /// The end point of the time internal in which a time-dependent visualization is defined.
    ///
    /// \return     Returns the end time of the time interval.
    ///
    virtual mi::Float64 get_end() const = 0;
};

/// The interface class \c ITime_step_assignment maps absolute time to time steps (or key frames).
///
/// The attribute defines how many time steps shall be imported for a large-scale dataset in the scene.
/// The attribute also allows deriving various/custom mapping techniques.
///
/// \ingroup nv_index_scene_description_attribute
///
class ITime_step_assignment :
        public mi::base::Interface_declare<0x9202feb1,0x4c0f,0x442a,0xfd,0x34,0x4d,0x1b,0x30,0x3d,0xa1,0xad,
                                           nv::index::IAttribute>
{
public:
    /// The number of time steps (or key frames) a distributed large-scale dataset shall provide.
    ///
    /// \return     Returns the number of time steps.
    ///
    virtual mi::Uint64 get_nb_time_steps() const = 0;
    virtual void set_nb_time_steps(mi::Uint64) = 0;

    /// Maps a absolute point in time to a time step.
    ///
    /// \param[in] current  The absolute point in time that maps to a time stamp. 
    /// \param[in] start    The start time of the global time interval. 
    /// \param[in] end      The end time of the global time interval. 
    /// 
    /// \return             Returns the time step for the given time stamp.
    ///
    virtual mi::Uint64 get_time_step(
        mi::Float64 current,
        mi::Float64 start,
        mi::Float64 end) const = 0;
};

}} // namespace index / nv

#endif // NVIDIA_INDEX_ITIME_MAPPING_H
