ParticleEmitter.hpp

// Copyright (C) 2017 Jérôme Leclercq
// This file is part of the "Nazara Engine - Graphics module"
// For conditions of distribution and use, see copyright notice in Config.hpp

#pragma once

#ifndef NAZARA_PARTICLEEMITTER_HPP
#define NAZARA_PARTICLEEMITTER_HPP

#include <Nazara/Prerequesites.hpp>
#include <Nazara/Core/Signal.hpp>
#include <Nazara/Graphics/Config.hpp>

namespace Nz
{
    class ParticleMapper;
    class ParticleGroup;

    class NAZARA_GRAPHICS_API ParticleEmitter
    {
        public:
            ParticleEmitter();
            ParticleEmitter(const ParticleEmitter& emitter);
            ParticleEmitter(ParticleEmitter&& emitter);
            virtual ~ParticleEmitter();

            virtual void Emit(ParticleGroup& system, float elapsedTime) const;

            void EnableLagCompensation(bool enable);

            std::size_t GetEmissionCount() const;
            float GetEmissionRate() const;

            bool IsLagCompensationEnabled() const;

            void SetEmissionCount(std::size_t count);
            void SetEmissionRate(float rate);

            ParticleEmitter& operator=(const ParticleEmitter& emitter) = default;
            ParticleEmitter& operator=(ParticleEmitter&& emitter);

            // Signals:
            NazaraSignal(OnParticleEmitterMove, ParticleEmitter* /*oldParticleEmitter*/, ParticleEmitter* /*newParticleEmitter*/);
            NazaraSignal(OnParticleEmitterRelease, const ParticleEmitter* /*particleEmitter*/);

        private:
            virtual void SetupParticles(ParticleMapper& mapper, unsigned int count) const = 0;

            bool m_lagCompensationEnabled;
            mutable float m_emissionAccumulator;
            float m_emissionRate;
            std::size_t m_emissionCount;
    };
}

#endif // NAZARA_PARTICLEEMITTER_HPP