/*
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-- Description : Particles system
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-- Creation date : 12 jun 1997               Author : FPI
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*/
#ifndef D_THROW_PRT
 
#include "acp_base.h"
#include "MTH.h"
#include "RND.h"
#include "MEC.h"
#include "GMT.h"
#include "GEO.h"
#include "GLI.h"
#include "COL.h"
 
#include "PRT/PrtSrc.h"
 
/*
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-- Description : Global variables
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*/
 
MTH_tdxReal PRT_g_xNbParticlesFactor = MTH_C_ONE;
 
/*
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-- Description : Particles source creation
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-- Creation date : 15 jun 1997               Author : FPI
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*/
void PRT_fn_vCreateParticlesSource ( PRT_tdstParticlesSource **_p_pstParticlesSource )
{
	GEO_M_CPAMalloc 
		( 
			*_p_pstParticlesSource,
            PRT_tdstParticlesSource *,
            sizeof ( PRT_tdstParticlesSource ),
            E_uwGEONotEnoughtMemory 
		);
  (*_p_pstParticlesSource)->ucLifeMode = PRT_C_ucNoLifeTime;
}
 
/*
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-- Description : Particles source destruction
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-- Creation date : 15 jun 1997               Author : FPI
--------------------------------------------------------------------------------
*/
 
#ifndef _FIRE_DEADCODE_U64_ /* Added by RUC */
void PRT_fn_vDestructParticlesSource ( PRT_tdstParticlesSource *_p_stParticlesSource )
{
	GEO_M_CPAFree ( _p_stParticlesSource );
}
#endif /* _FIRE_DEADCODE_U64_ */ /* Added by RUC */
 
 
/*
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-- Description : 
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-- Creation date : 12 jun 1997               Author : FPI
--------------------------------------------------------------------------------
*/
void PRT_fn_vSetQuadParticlesSource 
	( 
		PRT_tdstParticlesSource *_p_stParticlesSource,
        MTH3D_tdstVector *_p_stVertex1,
        MTH3D_tdstVector *_p_stVertex2,
        MTH3D_tdstVector *_p_stVertex3 
	)
{
	MTH3D_tdstVector stEdge12;
	MTH3D_tdstVector stEdge13;
 
	MTH3D_M_vCopyVector ( &(_p_stParticlesSource->stVertex1), _p_stVertex1 );
	MTH3D_M_vCopyVector ( &(_p_stParticlesSource->stVertex2), _p_stVertex2 );
	MTH3D_M_vCopyVector ( &(_p_stParticlesSource->stVertex3), _p_stVertex3 );
 
	MTH3D_M_vSubVector ( &stEdge12, _p_stVertex2, _p_stVertex1 );
	MTH3D_M_vSubVector ( &stEdge13, _p_stVertex3, _p_stVertex1 );
 
	MTH3D_M_vCrossProductVectorWithoutBuffer ( &(_p_stParticlesSource->stNormal) , &stEdge12 , &stEdge13 );
 
	MTH3D_M_vNormalizeVector ( &(_p_stParticlesSource->stNormal), &(_p_stParticlesSource->stNormal) );
}
 
/*
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-- Description : 
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-- Creation date : 12 jun 1997               Author : FPI
--------------------------------------------------------------------------------
*/
 
#ifndef _FIRE_DEADCODE_U64_ /* Added by RUC */
void PRT_fn_vSetPointParticlesSource( PRT_tdstParticlesSource *_p_stParticlesSource,MTH3D_tdstVector *_p_stVertex )
{
	MTH3D_M_vCopyVector( &(_p_stParticlesSource->stVertex1), _p_stVertex );
	MTH3D_M_vNullVector( &(_p_stParticlesSource->stNormal) );
}
#endif /* _FIRE_DEADCODE_U64_ */ /* Added by RUC */
 
 
 
/*
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-- Description : 
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-- Creation date : 12 jun 1997               Author : FPI
--------------------------------------------------------------------------------
*/
 
ACP_tdxBool PRT_fn_bComputeParticlesGeneration ( PRT_tdstParticlesSource *_p_stParticlesSource )
{
	/* continuous generation */
	if ( _p_stParticlesSource->ucGenerationMode == PRT_C_ucContinousGeneration )
		return TRUE;
 
	/* probabilist generattion */
	if ( _p_stParticlesSource->ucGenerationMode == PRT_C_ucProbabilistGeneration )
    {
		if ( _p_stParticlesSource->xGenerationProbability > RND_fn_xGetRealRandomValue ( 0, MTH_C_ZERO, MTH_C_ONE ) )
			return TRUE;
		return FALSE;
    }
 
	/* Crenel generation */
	if ( _p_stParticlesSource->ucGenerationMode == PRT_C_ucCrenelGeneration )
    {
		if ( _p_stParticlesSource->xFramesCounter < _p_stParticlesSource->xNbFramesNoGeneration )
        {
			_p_stParticlesSource->xFramesCounter ++;
            return FALSE;
        }
        _p_stParticlesSource->xFramesCounter = (_p_stParticlesSource->xFramesCounter+1)%_p_stParticlesSource->xNbFramesTotal;
        return TRUE;
	}
 
	/* bad generation code or no generation */
	return FALSE;
}
 
/*
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-- Description : 
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-- Creation date : 12 jun 1997               Author : FPI
--------------------------------------------------------------------------------
*/
ACP_tdxIndex PRT_fn_xComputeNbParticlesToInject ( PRT_tdstParticlesSource *_p_stParticlesSource )
{
	if ( _p_stParticlesSource->ucNbParticlesToGenerateMode == PRT_C_ucConstantNb )
		return _p_stParticlesSource->xNbParticlesToGenerate;
 
	if ( _p_stParticlesSource->ucNbParticlesToGenerateMode == PRT_C_ucProbabilistNb )
		return (ACP_tdxIndex) RND_fn_ulGetUnsignedLongRandomValue ( 0, _p_stParticlesSource->xNbMin, _p_stParticlesSource->xNbMax );
 
	return 0;
}
 
 
/*
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-- Description : 
--------------------------------------------------------------------------------
-- Creation date : 12 jun 1997               Author : FPI
--------------------------------------------------------------------------------
*/
 
#ifndef _FIRE_DEADCODE_U64_ /* Added by RUC */
void PRT_fn_vSetNbParticlesFactor ( MTH_tdxReal _xNbParticlesFactor )
{
	PRT_g_xNbParticlesFactor = _xNbParticlesFactor;
}
#endif /* _FIRE_DEADCODE_U64_ */ /* Added by RUC */
 
#endif /* D_THROW_PRT */