Light.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_LIGHT_HPP
#define NAZARA_LIGHT_HPP

#include <Nazara/Prerequesites.hpp>
#include <Nazara/Core/Color.hpp>
#include <Nazara/Graphics/Enums.hpp>
#include <Nazara/Graphics/Renderable.hpp>
#include <Nazara/Renderer/Texture.hpp>

namespace Nz
{
    class NAZARA_GRAPHICS_API Light : public Renderable
    {
        public:
            Light(LightType type = LightType_Point);
            inline Light(const Light& light);
            Light(Light&& light) = default;
            ~Light() = default;

            void AddToRenderQueue(AbstractRenderQueue* renderQueue, const Matrix4f& transformMatrix) const override;

            Light* Clone() const;
            Light* Create() const;

            bool Cull(const Frustumf& frustum, const Matrix4f& transformMatrix) const override;

            inline void EnableShadowCasting(bool castShadows);

            inline void EnsureShadowMapUpdate() const;

            inline float GetAmbientFactor() const;
            inline float GetAttenuation() const;
            inline Color GetColor() const;
            inline float GetDiffuseFactor() const;
            inline float GetInnerAngle() const;
            inline float GetInnerAngleCosine() const;
            inline float GetInvRadius() const;
            inline LightType GetLightType() const;
            inline float GetOuterAngle() const;
            inline float GetOuterAngleCosine() const;
            inline float GetOuterAngleTangent() const;
            inline float GetRadius() const;
            inline TextureRef GetShadowMap() const;
            inline PixelFormatType GetShadowMapFormat() const;
            inline const Vector2ui& GetShadowMapSize() const;

            inline bool IsShadowCastingEnabled() const;

            inline void SetAmbientFactor(float factor);
            inline void SetAttenuation(float attenuation);
            inline void SetColor(const Color& color);
            inline void SetDiffuseFactor(float factor);
            inline void SetInnerAngle(float innerAngle);
            inline void SetLightType(LightType type);
            inline void SetOuterAngle(float outerAngle);
            inline void SetRadius(float radius);
            inline void SetShadowMapFormat(PixelFormatType shadowFormat);
            inline void SetShadowMapSize(const Vector2ui& size);

            void UpdateBoundingVolume(const Matrix4f& transformMatrix) override;

            Light& operator=(const Light& light);
            Light& operator=(Light&& light) = default;

        private:
            void MakeBoundingVolume() const override;
            inline void InvalidateShadowMap();
            void UpdateShadowMap() const;

            Color m_color;
            LightType m_type;
            PixelFormatType m_shadowMapFormat;
            Vector2ui m_shadowMapSize;
            mutable TextureRef m_shadowMap;
            bool m_shadowCastingEnabled;
            mutable bool m_shadowMapUpdated;
            float m_ambientFactor;
            float m_attenuation;
            float m_diffuseFactor;
            float m_innerAngle;
            float m_innerAngleCosine;
            float m_invRadius;
            float m_outerAngle;
            float m_outerAngleCosine;
            float m_outerAngleTangent;
            float m_radius;
    };

    struct LightUniforms
    {
        struct UniformLocations
        {
            int type;
            int color;
            int factors;
            int lightViewProjMatrix;
            int parameters1;
            int parameters2;
            int parameters3;
            int shadowMapping;
        };

        bool ubo;

        union
        {
            UniformLocations locations;
            int blockLocation;
        };
    };
}

#include <Nazara/Graphics/Light.inl>

#endif // NAZARA_LIGHT_HPP