123 lines
3.2 KiB
C++
123 lines
3.2 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
|
|
//
|
|
// Purpose:
|
|
//
|
|
// $NoKeywords: $
|
|
//=============================================================================//
|
|
|
|
#include "cbase.h"
|
|
#include "c_baseentity.h"
|
|
#include "soundinfo.h"
|
|
|
|
// memdbgon must be the last include file in a .cpp file!!!
|
|
#include "tier0/memdbgon.h"
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// An entity which emits other entities at points
|
|
//-----------------------------------------------------------------------------
|
|
class C_FuncTrackTrain : public C_BaseEntity
|
|
{
|
|
public:
|
|
DECLARE_CLASS( C_FuncTrackTrain, C_BaseEntity );
|
|
DECLARE_CLIENTCLASS();
|
|
|
|
public:
|
|
virtual void OnDataChanged( DataUpdateType_t updateType );
|
|
virtual bool GetSoundSpatialization( SpatializationInfo_t& info );
|
|
|
|
virtual bool IsBaseTrain( void ) const { return true; }
|
|
|
|
|
|
private:
|
|
int m_nLongAxis;
|
|
float m_flRadius;
|
|
float m_flLineLength;
|
|
};
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Datatable
|
|
//-----------------------------------------------------------------------------
|
|
IMPLEMENT_CLIENTCLASS_DT( C_FuncTrackTrain, DT_FuncTrackTrain, CFuncTrackTrain )
|
|
END_RECV_TABLE()
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Sound spatialization
|
|
//-----------------------------------------------------------------------------
|
|
void C_FuncTrackTrain::OnDataChanged( DataUpdateType_t updateType )
|
|
{
|
|
BaseClass::OnDataChanged( updateType );
|
|
|
|
if (updateType == DATA_UPDATE_CREATED)
|
|
{
|
|
// Compute the cross-sectional area and dimension and length of the line segment
|
|
int nIndex1, nIndex2;
|
|
const Vector &vecOBBSize = CollisionProp()->OBBSize();
|
|
if ( ( vecOBBSize.x > vecOBBSize.y ) && ( vecOBBSize.x > vecOBBSize.z ) )
|
|
{
|
|
m_nLongAxis = 0;
|
|
nIndex1 = 1; nIndex2 = 2;
|
|
}
|
|
else if ( vecOBBSize.y > vecOBBSize.z )
|
|
{
|
|
m_nLongAxis = 1;
|
|
nIndex1 = 0; nIndex2 = 2;
|
|
}
|
|
else
|
|
{
|
|
m_nLongAxis = 2;
|
|
nIndex1 = 0; nIndex2 = 1;
|
|
}
|
|
|
|
m_flRadius = sqrt( vecOBBSize[nIndex1] * vecOBBSize[nIndex1] + vecOBBSize[nIndex2] * vecOBBSize[nIndex2] ) * 0.5f;
|
|
m_flLineLength = vecOBBSize[m_nLongAxis];
|
|
}
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Sound spatialization
|
|
//-----------------------------------------------------------------------------
|
|
bool C_FuncTrackTrain::GetSoundSpatialization( SpatializationInfo_t& info )
|
|
{
|
|
// Out of PVS
|
|
if ( IsDormant() )
|
|
return false;
|
|
|
|
if ( info.pflRadius )
|
|
{
|
|
*info.pflRadius = m_flRadius;
|
|
}
|
|
|
|
if ( info.pOrigin )
|
|
{
|
|
Vector vecStart, vecEnd, vecWorldDir;
|
|
Vector vecDir = vec3_origin;
|
|
vecDir[m_nLongAxis] = 1.0f;
|
|
VectorRotate( vecDir, EntityToWorldTransform(), vecWorldDir );
|
|
VectorMA( WorldSpaceCenter(), -0.5f * m_flLineLength, vecWorldDir, vecStart );
|
|
VectorMA( vecStart, m_flLineLength, vecWorldDir, vecEnd );
|
|
|
|
float t;
|
|
CalcClosestPointOnLine( info.info.vListenerOrigin, vecStart, vecEnd, *info.pOrigin, &t );
|
|
if ( t < 0.0f )
|
|
{
|
|
*info.pOrigin = vecStart;
|
|
}
|
|
else if ( t > 1.0f )
|
|
{
|
|
*info.pOrigin = vecEnd;
|
|
}
|
|
}
|
|
|
|
if ( info.pAngles )
|
|
{
|
|
VectorCopy( CollisionProp()->GetCollisionAngles(), *info.pAngles );
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|