1 files changed, 254 insertions, 0 deletions
diff --git a/Runtime/Camera/Light.h b/Runtime/Camera/Light.h
new file mode 100644
index 0000000..c14a59c
--- /dev/null
+++ b/Runtime/Camera/Light.h
@@ -0,0 +1,254 @@
+#ifndef LIGHT_H
+#define LIGHT_H
+
+#include "Lighting.h"
+#include "Flare.h"
+#include "ShadowSettings.h"
+#include "Runtime/GameCode/Behaviour.h"
+#include "Runtime/Math/Color.h"
+#include "Runtime/Math/Vector3.h"
+#include "Runtime/Geometry/AABB.h"
+#include "Runtime/GfxDevice/GfxDeviceObjects.h"
+#include "Runtime/GfxDevice/GfxDeviceConfigure.h"
+#include "Runtime/Utilities/LinkedList.h"
+#if UNITY_EDITOR
+#include "Editor/Src/LightmapVisualization.h"
+#endif
+#include "Runtime/Math/Rect.h"
+
+class Texture;
+class GfxDevice;
+
+class Light : public Behaviour, public ListElement
+{
+public:
+
+	REGISTER_DERIVED_CLASS   (Light, Behaviour)
+	DECLARE_OBJECT_SERIALIZE (Light)
+
+	Light (MemLabelId label, ObjectCreationMode mode);
+	// ~Light(); declared-by-macro
+
+	static void InitializeClass ();
+	static void CleanupClass ();
+	
+	// Tag class as sealed, this makes QueryComponent faster.
+	static bool IsSealedClass ()				{ return true; }
+	
+	virtual void Reset ();
+
+	// System interaction
+	virtual void AddToManager ();
+	virtual void RemoveFromManager ();
+	virtual void CheckConsistency ();
+	virtual void AwakeFromLoad(AwakeFromLoadMode mode);
+	
+	void TransformChanged ();
+	
+
+	LightType GetType() const { return static_cast<LightType>( m_Type ); }
+	void SetType (LightType type);
+
+
+	/// How to render this light.
+	enum RenderMode
+	{
+		kRenderAuto,			///< Automatic
+		kRenderImportant,		///< This light is important
+		kRenderNotImportant,	///< This light is not very important
+		kRenderModeCount // keep this last!
+	};
+	/// Get the render mode hint for this light
+	int GetRenderMode() const { return m_RenderMode; }
+	void SetRenderMode (int mode) 	{ m_RenderMode = mode; SetDirty(); m_GfxLightValid = false; }
+
+	enum Lightmapping
+	{
+		kLightmappingRealtimeOnly = 0, // light is not baked, realtime only
+		kLightmappingAuto = 1, // light is baked in the dual lightmap style
+		kLightmappingBakedOnly = 2 // light is fully baked, not rendering in realtime at all
+	};
+
+	void SetLightmapping (int mode) { m_Lightmapping = mode; SetDirty(); m_GfxLightValid = false; }
+	inline Lightmapping GetLightmappingForRender() const;
+	Lightmapping GetLightmappingForBake() const;
+
+	void SetActuallyLightmapped (bool v);
+	bool GetActuallyLightmapped() const { return m_ActuallyLightmapped; }
+
+	/// Get the full range of the light.
+	float GetRange() const 			{ return m_Range; }
+	void SetRange (float range) { m_Range = std::max(0.0F, range); SetDirty (); m_GfxLightValid = false; Precalc (); }
+
+	/// Get the spot angle in degrees.
+	float GetSpotAngle() const { return m_SpotAngle; }
+	void SetSpotAngle (float angle) { m_SpotAngle = angle; CheckConsistency(); SetDirty (); m_GfxLightValid = false; Precalc (); }
+	
+	float GetCookieSize() const { return m_CookieSize; }
+	void SetCookieSize (float size) { m_CookieSize = size; CheckConsistency(); SetDirty (); m_GfxLightValid = false; Precalc (); }
+	
+	// range * this value = end side length
+	float GetCotanHalfSpotAngle () const { return m_CotanHalfSpotAngle; }
+	// range * this value = diagonal side length
+	float GetInvCosHalfSpotAngle () const { return m_InvCosHalfSpotAngle; }
+
+	/// Get/set the cookie used for the light
+	void SetCookie (Texture *tex);
+	Texture *GetCookie () const { return m_Cookie; }
+	
+	/// Get/set the lens flare used
+	void SetFlare (Flare *flare);
+	Flare *GetFlare () { return m_Flare; }
+		
+	const ColorRGBAf& GetColor () const { return m_Color; }
+	void SetColor (const ColorRGBAf& c);
+	ColorRGBAf GetConvertedFinalColor() const { return m_ConvertedFinalColor; }
+	
+	float GetIntensity() const { return m_Intensity; }
+	void SetIntensity( float i );
+
+	float GetShadowStrength() const { return m_Shadows.m_Strength; }
+	void SetShadowStrength( float f ) { m_Shadows.m_Strength = f; SetDirty(); }
+	ShadowType GetShadows() const { return static_cast<ShadowType>(m_Shadows.m_Type); }
+	void SetShadows( int v );
+	int GetShadowResolution() const { return m_Shadows.m_Resolution; }
+	void SetShadowResolution( int v ) { m_Shadows.m_Resolution = v; SetDirty(); }
+	float GetShadowBias() const { return m_Shadows.m_Bias; }
+	void SetShadowBias( float v ) { m_Shadows.m_Bias = v; SetDirty(); }
+	float GetShadowSoftness() const { return m_Shadows.m_Softness; }
+	void SetShadowSoftness (float v) { m_Shadows.m_Softness = v; SetDirty(); }
+	float GetShadowSoftnessFade() const { return m_Shadows.m_SoftnessFade; }
+	void SetShadowSoftnessFade (float v) { m_Shadows.m_SoftnessFade = v; SetDirty(); }
+	
+	int GetFinalShadowResolution() const;
+
+	#if UNITY_EDITOR
+	int GetShadowSamples() const { return m_ShadowSamples; }
+	void SetShadowSamples (int samples) { m_ShadowSamples = samples; }
+	float GetShadowRadius() const { return m_ShadowRadius; }
+	void SetShadowRadius (float radius) { m_ShadowRadius = radius; }
+	float GetShadowAngle() const { return m_ShadowAngle; }
+	void SetShadowAngle (float angle) { m_ShadowAngle = angle; }
+	float GetIndirectIntensity() const { return m_IndirectIntensity; }
+	void SetIndirectIntensity (float intensity) { m_IndirectIntensity = intensity; }
+	Vector2f GetAreaSize() const { return m_AreaSize; }
+	void SetAreaSize(const Vector2f& areaSize) { m_AreaSize = areaSize; }
+	#endif
+
+	/// Calculate the quadratic attenuation factor for a light with a specified range
+	/// @param range the range of the light
+	/// @return the quadratic attenuation factor
+	static float CalcQuadFac (float range);
+
+	// Attenuation function: inverse quadratic. distSqr is over 0..1 range
+	static float AttenuateNormalized(float distSqr);
+
+	// Get the result of attenuation for a squared distance from the light
+	float AttenuateApprox (float sqrDist) const;
+
+	// Set up this light as GfxDevice fixed function per-vertex light.
+	// IMPORTANT: Assumes the modelview matrix has been set up to be the world2camera matrix.
+	void SetupVertexLight (int lightNo, float visibilityFade);
+
+	void SetLightKeyword();
+	void SetPropsToShaderLab (float blend) const;
+	
+
+	// Set up the halo for the light.
+	void SetupHalo ();
+	// Set up the flare for the light.
+	void SetupFlare ();
+	
+	void SetCullingMask (int mask) { m_CullingMask.m_Bits = mask; SetDirty(); }
+	int GetCullingMask () const { return m_CullingMask.m_Bits; }
+
+	// Precalc all non-changing shaderlab values.
+	void Precalc ();
+
+	const Vector3f& GetWorldPosition() const { return m_WorldPosition; }
+	const Matrix4x4f& GetWorldToLocalMatrix() const { return m_World2Local; }
+
+	enum AttenuationMode
+	{
+		kSpotCookie,		// 2D cookie projected in spot light's cone
+		kPointFalloff,		// Attenuation for a point light
+		kDirectionalCookie,	// Cookie projected from a directional light
+		kUnused				// The attenuation texture is not used
+	};
+	void GetMatrix (const Matrix4x4f* __restrict object2light, Matrix4x4f* __restrict outMatrix) const;
+
+	bool IsValidToRender() const;
+
+private:
+	void UpdateSpotAngleValues ()
+	{
+		float halfSpotRad = Deg2Rad(m_SpotAngle * 0.5f);
+		float cs = cosf(halfSpotRad);
+		float ss = sinf(halfSpotRad);
+		m_CotanHalfSpotAngle = cs / ss;
+		m_InvCosHalfSpotAngle = 1.0f / cs;
+	}
+
+	void ComputeGfxLight (GfxVertexLight& gfxLight) const;
+
+private:
+	Matrix4x4f		m_World2Local;
+	Vector3f		m_WorldPosition;
+	ShadowSettings	m_Shadows;			///< Shadow settings.
+	
+	ColorRGBAf m_Color;
+	ColorRGBAf m_ConvertedFinalColor;
+	
+	PPtr<Flare> m_Flare;				///< Does the light have a flare?
+	PPtr<Texture> m_Cookie;				///< Custom cookie (optional). 
+	BitField  m_CullingMask;            ///< The mask used for selectively lighting objects in the scene.
+	float	m_Intensity;				///< Light intensity range {0.0, 8.0}
+	float	m_Range; 					///< Light range
+	float	m_SpotAngle;				///< Angle of the spotlight cone.
+	float	m_CookieSize;				///< Cookie size for directional lights.
+	float	m_CotanHalfSpotAngle; // cotangent of half of the spot angle
+	float	m_InvCosHalfSpotAngle; // 1/cos of half of the spot angle
+	int		m_RenderMode;				///< enum { Auto, Important, Not Important } Rendering mode for the light.
+	int		m_Lightmapping;				///< enum { RealtimeOnly, Auto, BakedOnly } Is light baked into lightmaps?
+	int		m_Type;						///< enum { Spot, Directional, Point, Area (baked only) } Light type
+	bool    m_DrawHalo;					///< Does the light have a halo?
+	bool	m_ActuallyLightmapped; // Is it actually lightmapped already?
+	#if UNITY_EDITOR
+	int		m_ShadowSamples;			// number of samples for lightmapper shadow calculations
+	float	m_ShadowRadius;				// radius of the light source for lightmapper shadow calculations (point and spot lights)
+	float	m_ShadowAngle;				// angle of the cone for lightmapper shadow rays (directional lights)
+	float	m_IndirectIntensity;		// aka bounce intensity - a multiplier for the indirect light
+	Vector2f m_AreaSize;				// size of area light's rectangle
+	#endif
+	
+	PPtr<Texture>	m_AttenuationTexture;
+	AttenuationMode m_AttenuationMode;
+	LightKeywordMode	m_KeywordMode; // The current keyword used by the light
+		
+	int m_HaloHandle, m_FlareHandle;
+	
+	GfxVertexLight m_CachedGfxLight;
+	bool	m_GfxLightValid;
+};
+
+void SetupVertexLights(const std::vector<Light*>& lights);
+void SetLightScissorRect (const Rectf& lightRect, const Rectf& viewPort, bool intoRT, GfxDevice& device);
+void ClearScissorRect (bool oldScissor, const int oldRect[4], GfxDevice& device);
+
+
+// Inline this; called a lot in light culling.
+inline Light::Lightmapping Light::GetLightmappingForRender() const 
+{
+	if (m_Type == kLightArea)
+		return kLightmappingBakedOnly;
+
+	// all lights behave as realtime only if no lightmaps have been baked yet or if lightmaps are disabled
+	return m_ActuallyLightmapped
+		#if UNITY_EDITOR
+		&& GetLightmapVisualization().GetUseLightmapsForRendering()
+		#endif
+		? static_cast<Lightmapping>(m_Lightmapping) : kLightmappingRealtimeOnly; 
+}
+
+
+#endif