mirror of
https://github.com/alliedmodders/hl2sdk.git
synced 2024-12-22 17:47:38 +08:00
135 lines
3.9 KiB
C++
135 lines
3.9 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
|
|
//
|
|
// Purpose:
|
|
//
|
|
// $Workfile: $
|
|
// $NoKeywords: $
|
|
//=============================================================================//
|
|
#include "cbase.h"
|
|
#include "particle_simple3d.h"
|
|
#include "view.h"
|
|
|
|
// memdbgon must be the last include file in a .cpp file!!!
|
|
#include "tier0/memdbgon.h"
|
|
|
|
// Defined in pm_math.c
|
|
float anglemod( float a );
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Purpose :
|
|
// Input :
|
|
// Output :
|
|
//------------------------------------------------------------------------------
|
|
CSmartPtr<CSimple3DEmitter> CSimple3DEmitter::Create( const char *pDebugName )
|
|
{
|
|
CSimple3DEmitter* pSimple3DEmitter = new CSimple3DEmitter( pDebugName );
|
|
|
|
// Do in world space
|
|
pSimple3DEmitter->m_ParticleEffect.SetEffectCameraSpace( false );
|
|
return pSimple3DEmitter;
|
|
}
|
|
|
|
|
|
void CSimple3DEmitter::SimulateParticles( CParticleSimulateIterator *pIterator )
|
|
{
|
|
Particle3D *pParticle = (Particle3D*)pIterator->GetFirst();
|
|
while ( pParticle )
|
|
{
|
|
const float timeDelta = pIterator->GetTimeDelta();
|
|
|
|
//Should this particle die?
|
|
pParticle->m_flLifeRemaining -= timeDelta;
|
|
|
|
if ( pParticle->IsDead() )
|
|
{
|
|
pIterator->RemoveParticle( pParticle );
|
|
}
|
|
else
|
|
{
|
|
// Angular rotation
|
|
pParticle->m_vAngles.x += pParticle->m_flAngSpeed * timeDelta;
|
|
pParticle->m_vAngles.y += pParticle->m_flAngSpeed * timeDelta;
|
|
pParticle->m_vAngles.z += pParticle->m_flAngSpeed * timeDelta;
|
|
|
|
//Simulate the movement with collision
|
|
trace_t trace;
|
|
m_ParticleCollision.MoveParticle( pParticle->m_Pos, pParticle->m_vecVelocity, &pParticle->m_flAngSpeed, timeDelta, &trace );
|
|
|
|
// ---------------------------------------
|
|
// Decay towards flat
|
|
// ---------------------------------------
|
|
if (pParticle->m_flAngSpeed == 0 || trace.fraction != 1.0)
|
|
{
|
|
pParticle->m_vAngles.x = anglemod(pParticle->m_vAngles.x);
|
|
if (pParticle->m_vAngles.x < 180)
|
|
{
|
|
if (fabs(pParticle->m_vAngles.x - 90) > 0.5)
|
|
{
|
|
pParticle->m_vAngles.x = 0.5*pParticle->m_vAngles.x + 46;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (fabs(pParticle->m_vAngles.x - 270) > 0.5)
|
|
{
|
|
pParticle->m_vAngles.x = 0.5*pParticle->m_vAngles.x + 135;
|
|
}
|
|
}
|
|
|
|
pParticle->m_vAngles.y = anglemod(pParticle->m_vAngles.y);
|
|
if (fabs(pParticle->m_vAngles.y) > 0.5)
|
|
{
|
|
pParticle->m_vAngles.y = 0.5*pParticle->m_vAngles.z;
|
|
}
|
|
}
|
|
}
|
|
|
|
pParticle = (Particle3D*)pIterator->GetNext();
|
|
}
|
|
}
|
|
|
|
|
|
void CSimple3DEmitter::RenderParticles( CParticleRenderIterator *pIterator )
|
|
{
|
|
const Particle3D *pParticle = (const Particle3D *)pIterator->GetFirst();
|
|
while ( pParticle )
|
|
{
|
|
float sortKey = CurrentViewForward().Dot( CurrentViewOrigin() - pParticle->m_Pos );
|
|
|
|
// -------------------------------------------------------
|
|
// Set color based on direction towards camera
|
|
// -------------------------------------------------------
|
|
Vector color;
|
|
Vector vFaceNorm;
|
|
Vector vCameraToFace = (pParticle->m_Pos - CurrentViewOrigin());
|
|
AngleVectors(pParticle->m_vAngles,&vFaceNorm);
|
|
float flFacing = DotProduct(vCameraToFace,vFaceNorm);
|
|
|
|
if (flFacing <= 0)
|
|
{
|
|
color[0] = pParticle->m_uchFrontColor[0] / 255.0f;
|
|
color[1] = pParticle->m_uchFrontColor[1] / 255.0f;
|
|
color[2] = pParticle->m_uchFrontColor[2] / 255.0f;
|
|
}
|
|
else
|
|
{
|
|
color[0] = pParticle->m_uchBackColor[0] / 255.0f;
|
|
color[1] = pParticle->m_uchBackColor[1] / 255.0f;
|
|
color[2] = pParticle->m_uchBackColor[2] / 255.0f;
|
|
}
|
|
|
|
//Render it in world space
|
|
RenderParticle_ColorSizeAngles(
|
|
pIterator->GetParticleDraw(),
|
|
pParticle->m_Pos,
|
|
color,
|
|
pParticle->GetFadeFraction(),
|
|
pParticle->m_uchSize,
|
|
pParticle->m_vAngles);
|
|
|
|
pParticle = (const Particle3D *)pIterator->GetNext( sortKey );
|
|
}
|
|
}
|
|
|
|
|