mirror of
https://github.com/alliedmodders/hl2sdk.git
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119 lines
3.3 KiB
C++
119 lines
3.3 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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// $NoKeywords: $
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//===========================================================================//
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#include "cbase.h"
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#include "view_shared.h"
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// memdbgon must be the last include file in a .cpp file!!!
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#include "tier0/memdbgon.h"
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class C_FuncReflectiveGlass : public C_BaseEntity
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{
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public:
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DECLARE_CLASS( C_FuncReflectiveGlass, C_BaseEntity );
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DECLARE_CLIENTCLASS();
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// C_BaseEntity.
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public:
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C_FuncReflectiveGlass();
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virtual ~C_FuncReflectiveGlass();
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virtual bool ShouldDraw();
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C_FuncReflectiveGlass *m_pNext;
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};
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IMPLEMENT_CLIENTCLASS_DT( C_FuncReflectiveGlass, DT_FuncReflectiveGlass, CFuncReflectiveGlass )
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END_RECV_TABLE()
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//-----------------------------------------------------------------------------
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// Globals
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//-----------------------------------------------------------------------------
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C_EntityClassList<C_FuncReflectiveGlass> g_ReflectiveGlassList;
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template<> C_FuncReflectiveGlass *C_EntityClassList<C_FuncReflectiveGlass>::m_pClassList = NULL;
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C_FuncReflectiveGlass* GetReflectiveGlassList()
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{
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return g_ReflectiveGlassList.m_pClassList;
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}
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//-----------------------------------------------------------------------------
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// Constructor, destructor
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//-----------------------------------------------------------------------------
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C_FuncReflectiveGlass::C_FuncReflectiveGlass()
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{
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g_ReflectiveGlassList.Insert( this );
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}
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C_FuncReflectiveGlass::~C_FuncReflectiveGlass()
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{
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g_ReflectiveGlassList.Remove( this );
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}
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bool C_FuncReflectiveGlass::ShouldDraw()
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{
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return true;
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}
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//-----------------------------------------------------------------------------
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// Do we have reflective glass in view?
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//-----------------------------------------------------------------------------
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bool IsReflectiveGlassInView( const CViewSetup& view, cplane_t &plane )
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{
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// Early out if no cameras
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C_FuncReflectiveGlass *pReflectiveGlass = GetReflectiveGlassList();
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if ( !pReflectiveGlass )
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return false;
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Frustum_t frustum;
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GeneratePerspectiveFrustum( view.origin, view.angles, view.zNear, view.zFar, view.fov, view.m_flAspectRatio, frustum );
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cplane_t localPlane;
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Vector vecOrigin, vecWorld, vecDelta, vecForward;
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AngleVectors( view.angles, &vecForward, NULL, NULL );
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for ( ; pReflectiveGlass != NULL; pReflectiveGlass = pReflectiveGlass->m_pNext )
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{
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if ( pReflectiveGlass->IsDormant() )
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continue;
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Vector vecMins, vecMaxs;
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pReflectiveGlass->GetRenderBoundsWorldspace( vecMins, vecMaxs );
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if ( R_CullBox( vecMins, vecMaxs, frustum ) )
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continue;
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const model_t *pModel = pReflectiveGlass->GetModel();
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const matrix3x4_t& mat = pReflectiveGlass->EntityToWorldTransform();
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int nCount = modelinfo->GetBrushModelPlaneCount( pModel );
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for ( int i = 0; i < nCount; ++i )
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{
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modelinfo->GetBrushModelPlane( pModel, i, localPlane, &vecOrigin );
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MatrixTransformPlane( mat, localPlane, plane ); // Transform to world space
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VectorTransform( vecOrigin, mat, vecWorld );
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if ( view.origin.Dot( plane.normal ) <= plane.dist ) // Check for view behind plane
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continue;
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VectorSubtract( vecWorld, view.origin, vecDelta ); // Backface cull
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if ( vecDelta.Dot( plane.normal ) >= 0 )
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continue;
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return true;
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}
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}
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return false;
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}
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