1 files changed, 135 insertions, 0 deletions
diff --git a/public/movieobjects/dmelight.h b/public/movieobjects/dmelight.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// A class representing a light
+//
+//=============================================================================
+
+#ifndef DMELIGHT_H
+#define DMELIGHT_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "movieobjects/dmedag.h"
+
+
+//-----------------------------------------------------------------------------
+// Forward declaration
+//-----------------------------------------------------------------------------
+struct LightDesc_t;
+
+
+//-----------------------------------------------------------------------------
+// A base class for lights
+//-----------------------------------------------------------------------------
+class CDmeLight : public CDmeDag
+{
+	DEFINE_ELEMENT( CDmeLight, CDmeDag );
+
+public:
+	// Sets the color and intensity
+	// NOTE: Color is specified 0-255 floating point.
+	void SetColor( const Color &color );
+	void SetIntensity( float flIntensity );
+
+	// Sets up render state in the material system for rendering
+	virtual void SetupRenderState( int nLightIndex );
+	virtual bool GetLightDesc( LightDesc_t *pDesc ) { return false; }
+
+protected:
+	// Sets up render state in the material system for rendering
+	void SetupRenderStateInternal( LightDesc_t &desc, float flAtten0, float flAtten1, float flAtten2 );
+
+	CDmaVar< Color > m_Color;
+	CDmaVar< float > m_flIntensity;
+};
+
+
+//-----------------------------------------------------------------------------
+// A directional light
+//-----------------------------------------------------------------------------
+class CDmeDirectionalLight : public CDmeLight
+{
+	DEFINE_ELEMENT( CDmeDirectionalLight, CDmeLight );
+
+public:
+	void SetDirection( const Vector &direction );
+	const Vector &GetDirection() const { return m_Direction; }
+
+	// Sets up render state in the material system for rendering
+	virtual bool GetLightDesc( LightDesc_t *pDesc );
+
+private:
+	CDmaVar<Vector> m_Direction;
+};
+
+
+//-----------------------------------------------------------------------------
+// A point light
+//-----------------------------------------------------------------------------
+class CDmePointLight : public CDmeLight
+{
+	DEFINE_ELEMENT( CDmePointLight, CDmeLight );
+
+public:
+	void SetPosition( const Vector &pos ) { m_Position = pos; }
+	const Vector &GetPosition() const { return m_Position; }
+
+	// Sets the attenuation factors
+	void SetAttenuation( float flConstant, float flLinear, float flQuadratic );
+
+	// Sets the maximum range
+	void SetMaxDistance( float flMaxDistance );
+
+	// Sets up render state in the material system for rendering
+	virtual bool GetLightDesc( LightDesc_t *pDesc );
+
+protected:
+	CDmaVar< Vector >	m_Position;
+	CDmaVar< float >	m_flAttenuation0;
+	CDmaVar< float >	m_flAttenuation1;
+	CDmaVar< float >	m_flAttenuation2;
+	CDmaVar< float >	m_flMaxDistance;
+};
+
+
+//-----------------------------------------------------------------------------
+// A spot light
+//-----------------------------------------------------------------------------
+class CDmeSpotLight : public CDmePointLight
+{
+	DEFINE_ELEMENT( CDmeSpotLight, CDmePointLight );
+
+public:
+	// Sets the spotlight direction
+	void SetDirection( const Vector &direction );
+
+	// Sets the spotlight angle factors
+	// Angles are specified in degrees, as full angles (as opposed to half-angles)
+	void SetAngles( float flInnerAngle, float flOuterAngle, float flAngularFalloff );
+
+	// Sets up render state in the material system for rendering
+	virtual bool GetLightDesc( LightDesc_t *pDesc );
+
+private:
+	CDmaVar<Vector> m_Direction;
+	CDmaVar<float>	m_flSpotInnerAngle;
+	CDmaVar<float>	m_flSpotOuterAngle;
+	CDmaVar<float>	m_flSpotAngularFalloff;
+};
+
+
+//-----------------------------------------------------------------------------
+// An ambient light
+//-----------------------------------------------------------------------------
+class CDmeAmbientLight : public CDmeLight
+{
+	DEFINE_ELEMENT( CDmeAmbientLight, CDmeLight );
+
+public:
+	// Sets up render state in the material system for rendering
+	virtual void SetupRenderState( int nLightIndex );
+};
+
+
+#endif // DMELIGHT_H