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engine/render.h

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//
+//===========================================================================//
+
+#ifndef RENDER_H
+#define RENDER_H
+
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "mathlib/vector.h"
+
+// render.h -- public interface to refresh functions
+
+extern float r_blend; // Global blending factor for the current entity
+extern float r_colormod[3]; // Global color modulation for the current entity
+extern bool g_bIsBlendingOrModulating;
+
+
+//-----------------------------------------------------------------------------
+// Current view
+//-----------------------------------------------------------------------------
+inline const Vector &CurrentViewOrigin()
+{
+#ifdef DBGFLAG_ASSERT
+	extern bool g_bCanAccessCurrentView;
+#endif
+	extern Vector g_CurrentViewOrigin;
+	Assert( g_bCanAccessCurrentView );
+	return g_CurrentViewOrigin;
+}
+
+inline const Vector &CurrentViewForward()
+{
+#ifdef DBGFLAG_ASSERT
+	extern bool g_bCanAccessCurrentView;
+#endif
+	extern Vector g_CurrentViewForward;
+	Assert( g_bCanAccessCurrentView );
+	return g_CurrentViewForward;
+}
+
+inline const Vector &CurrentViewRight()
+{
+#ifdef DBGFLAG_ASSERT
+	extern bool g_bCanAccessCurrentView;
+#endif
+	extern Vector g_CurrentViewRight;
+	Assert( g_bCanAccessCurrentView );
+	return g_CurrentViewRight;
+}
+
+inline const Vector &CurrentViewUp()
+{
+#ifdef DBGFLAG_ASSERT
+	extern bool g_bCanAccessCurrentView;
+#endif
+	extern Vector g_CurrentViewUp;
+	Assert( g_bCanAccessCurrentView );
+	return g_CurrentViewUp;
+}
+
+
+//-----------------------------------------------------------------------------
+// Main view
+//-----------------------------------------------------------------------------
+inline const Vector &MainViewOrigin()
+{
+	extern Vector g_MainViewOrigin;
+	return g_MainViewOrigin;
+}
+
+inline const Vector &MainViewForward()
+{
+	extern Vector g_MainViewForward;
+	return g_MainViewForward;
+}
+
+inline const Vector &MainViewRight()
+{
+	extern Vector g_MainViewRight;
+	return g_MainViewRight;
+}
+
+inline const Vector &MainViewUp()
+{
+	extern Vector g_MainViewUp;
+	return g_MainViewUp;
+}
+
+
+void R_Init (void);
+void R_LevelInit(void);
+void R_LevelShutdown(void);
+
+// Loads world geometry. Called when map changes or dx level changes
+void R_LoadWorldGeometry( bool bDXChange = false );
+
+#include "view_shared.h"
+#include "ivrenderview.h"
+
+class VMatrix;
+
+abstract_class IRender
+{
+public:
+	virtual void	FrameBegin( void ) = 0;
+	virtual void	FrameEnd( void ) = 0;
+	
+	virtual void	ViewSetupVis( bool novis, int numorigins, const Vector origin[] ) = 0;
+
+	virtual void	ViewDrawFade( byte *color, IMaterial* pFadeMaterial ) = 0;
+
+	virtual void	DrawSceneBegin( void ) = 0;
+	virtual void	DrawSceneEnd( void ) = 0;
+
+	virtual IWorldRenderList * CreateWorldList() = 0;
+	virtual void	BuildWorldLists( IWorldRenderList *pList, WorldListInfo_t* pInfo, int iForceViewLeaf, const VisOverrideData_t* pVisData, bool bShadowDepth, float *pReflectionWaterHeight ) = 0;
+	virtual void	DrawWorldLists( IWorldRenderList *pList, unsigned long flags, float waterZAdjust ) = 0;
+
+	// UNDONE: these are temporary functions that will end up on the other
+	// side of this interface
+	// accessors
+//	virtual const Vector& UnreflectedViewOrigin() = 0;
+	virtual const Vector& ViewOrigin( void ) = 0;
+	virtual const QAngle& ViewAngles( void ) = 0;
+	virtual CViewSetup const &ViewGetCurrent( void ) = 0;
+	virtual const VMatrix& ViewMatrix( void ) = 0;
+	virtual const VMatrix& WorldToScreenMatrix( void ) = 0;
+	virtual float	GetFramerate( void ) = 0;
+	virtual float	GetZNear( void ) = 0;
+	virtual float	GetZFar( void ) = 0;
+
+	// Query current fov and view model fov
+	virtual float	GetFov( void ) = 0;
+	virtual float	GetFovY( void ) = 0;
+	virtual float	GetFovViewmodel( void ) = 0;
+
+
+	// Compute the clip-space coordinates of a point in 3D
+	// Clip-space is normalized screen coordinates (-1 to 1 in x and y)
+	// Returns true if the point is behind the camera
+	virtual bool	ClipTransformWithProjection ( const VMatrix& worldToScreen, const Vector& point, Vector* pClip ) = 0;
+	// Same, using the current engine's matrices.
+	virtual bool	ClipTransform( Vector const& point, Vector* pClip ) = 0;
+
+	// Compute the screen-space coordinates of a point in 3D
+	// This returns actual pixels
+	// Returns true if the point is behind the camera
+	virtual bool ScreenTransform( Vector const& point, Vector* pScreen ) = 0;
+
+	virtual void Push3DView( const CViewSetup &view, int nFlags, ITexture* pRenderTarget, Frustum frustumPlanes ) = 0;
+	virtual void Push3DView( const CViewSetup &view, int nFlags, ITexture* pRenderTarget, Frustum frustumPlanes, ITexture* pDepthTexture ) = 0;
+	virtual void Push2DView( const CViewSetup &view, int nFlags, ITexture* pRenderTarget, Frustum frustumPlanes ) = 0;
+	virtual void PopView( Frustum frustumPlanes ) = 0;
+	virtual void SetMainView( const Vector &vecOrigin, const QAngle &angles ) = 0;
+	virtual void ViewSetupVisEx( bool novis, int numorigins, const Vector origin[], unsigned int &returnFlags ) = 0;
+	virtual void OverrideViewFrustum( Frustum custom ) = 0;
+	virtual void UpdateBrushModelLightmap( model_t *model, IClientRenderable *Renderable ) = 0;
+	virtual void BeginUpdateLightmaps( void ) = 0;
+	virtual void EndUpdateLightmaps( void ) = 0;
+	virtual bool InLightmapUpdate( void ) const = 0;
+};
+
+void R_PushDlights (void);
+
+// UNDONE Remove this - pass this around to functions/systems that need it.
+extern IRender *g_EngineRenderer;
+#endif			// RENDER_H