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122 lines
3.2 KiB
122 lines
3.2 KiB
//========= Copyright © 1996-2005, 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 "c_baseentity.h"
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#include "soundinfo.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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//-----------------------------------------------------------------------------
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// An entity which emits other entities at points
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//-----------------------------------------------------------------------------
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class C_FuncTrackTrain : public C_BaseEntity
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{
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public:
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DECLARE_CLASS( C_FuncTrackTrain, C_BaseEntity );
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DECLARE_CLIENTCLASS();
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public:
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virtual void OnDataChanged( DataUpdateType_t updateType );
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virtual bool GetSoundSpatialization( SpatializationInfo_t& info );
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virtual bool IsBaseTrain( void ) const { return true; }
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private:
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int m_nLongAxis;
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float m_flRadius;
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float m_flLineLength;
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};
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//-----------------------------------------------------------------------------
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// Datatable
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//-----------------------------------------------------------------------------
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IMPLEMENT_CLIENTCLASS_DT( C_FuncTrackTrain, DT_FuncTrackTrain, CFuncTrackTrain )
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END_RECV_TABLE()
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//-----------------------------------------------------------------------------
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// Sound spatialization
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//-----------------------------------------------------------------------------
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void C_FuncTrackTrain::OnDataChanged( DataUpdateType_t updateType )
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{
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BaseClass::OnDataChanged( updateType );
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if (updateType == DATA_UPDATE_CREATED)
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{
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// Compute the cross-sectional area and dimension and length of the line segment
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int nIndex1, nIndex2;
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const Vector &vecOBBSize = CollisionProp()->OBBSize();
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if ( ( vecOBBSize.x > vecOBBSize.y ) && ( vecOBBSize.x > vecOBBSize.z ) )
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{
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m_nLongAxis = 0;
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nIndex1 = 1; nIndex2 = 2;
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}
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else if ( vecOBBSize.y > vecOBBSize.z )
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{
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m_nLongAxis = 1;
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nIndex1 = 0; nIndex2 = 2;
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}
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else
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{
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m_nLongAxis = 2;
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nIndex1 = 0; nIndex2 = 1;
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}
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m_flRadius = sqrt( vecOBBSize[nIndex1] * vecOBBSize[nIndex1] + vecOBBSize[nIndex2] * vecOBBSize[nIndex2] ) * 0.5f;
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m_flLineLength = vecOBBSize[m_nLongAxis];
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}
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}
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//-----------------------------------------------------------------------------
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// Sound spatialization
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//-----------------------------------------------------------------------------
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bool C_FuncTrackTrain::GetSoundSpatialization( SpatializationInfo_t& info )
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{
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// Out of PVS
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if ( IsDormant() )
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return false;
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if ( info.pflRadius )
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{
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*info.pflRadius = m_flRadius;
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}
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if ( info.pOrigin )
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{
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Vector vecStart, vecEnd, vecWorldDir;
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Vector vecDir = vec3_origin;
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vecDir[m_nLongAxis] = 1.0f;
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VectorRotate( vecDir, EntityToWorldTransform(), vecWorldDir );
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VectorMA( WorldSpaceCenter(), -0.5f * m_flLineLength, vecWorldDir, vecStart );
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VectorMA( vecStart, m_flLineLength, vecWorldDir, vecEnd );
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float t;
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CalcClosestPointOnLine( info.info.vListenerOrigin, vecStart, vecEnd, *info.pOrigin, &t );
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if ( t < 0.0f )
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{
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*info.pOrigin = vecStart;
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}
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else if ( t > 1.0f )
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{
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*info.pOrigin = vecEnd;
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}
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}
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if ( info.pAngles )
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{
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VectorCopy( CollisionProp()->GetCollisionAngles(), *info.pAngles );
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}
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return true;
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}
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