void ParticleSystem::DrawParticle(particle *part, vec3_t &right, vec3_t &up)
{
float fSize = part->m_fSize;
vec3_t point1,point2,point3,point4;
vec3_t origin = part->origin;
// nothing to draw?
if (fSize == 0) return;
//frustrum visible check
if(!ParticleIsVisible(part)) return;
float fCosSize = CosLookup(part->m_fAngle)*fSize;
float fSinSize = SinLookup(part->m_fAngle)*fSize;
// calculate the four corners of the sprite
VectorMA (origin, fSinSize, up, point1);
VectorMA (point1, -fCosSize, right, point1);
VectorMA (origin, fCosSize, up, point2);
VectorMA (point2, fSinSize, right, point2);
VectorMA (origin, -fSinSize, up, point3);
VectorMA (point3, fCosSize, right, point3);
VectorMA (origin, -fCosSize, up, point4);
VectorMA (point4, -fSinSize, right, point4);
struct model_s * pModel;
int iContents = 0;
for (particle *pDraw = part; pDraw; pDraw = pDraw->m_pOverlay)
{
if (pDraw->pType->m_hSprite == 0)
continue;
if (pDraw->pType->m_iDrawCond)
{
if (iContents == 0)
iContents = gEngfuncs.PM_PointContents(origin, NULL);
if (iContents != pDraw->pType->m_iDrawCond)
continue;
}
pModel = (struct model_s *)gEngfuncs.GetSpritePointer( pDraw->pType->m_hSprite );
// if we've reached the end of the sprite's frames, loop back
while (pDraw->frame > pModel->numframes) pDraw->frame -= pModel->numframes;
while (pDraw->frame < 0) pDraw->frame += pModel->numframes;
if ( !gEngfuncs.pTriAPI->SpriteTexture( pModel, int(pDraw->frame) ))continue;
gEngfuncs.pTriAPI->RenderMode(pDraw->pType->m_iRenderMode);
gEngfuncs.pTriAPI->Color4f( pDraw->m_fRed, pDraw->m_fGreen, pDraw->m_fBlue, pDraw->m_fAlpha );
gEngfuncs.pTriAPI->Begin( TRI_QUADS );
gEngfuncs.pTriAPI->TexCoord2f (0, 0);
gEngfuncs.pTriAPI->Vertex3fv(point1);
gEngfuncs.pTriAPI->TexCoord2f (1, 0);
gEngfuncs.pTriAPI->Vertex3fv (point2);
gEngfuncs.pTriAPI->TexCoord2f (1, 1);
gEngfuncs.pTriAPI->Vertex3fv (point3);
gEngfuncs.pTriAPI->TexCoord2f (0, 1);
gEngfuncs.pTriAPI->Vertex3fv (point4);
gEngfuncs.pTriAPI->End();
}
}
bool ParticleSystem::UpdateParticle(particle *part, float frametime)
{
if (frametime == 0 ) return true;
part->age += frametime;
cl_entity_t *source = UTIL_GetClientEntityWithServerIndex( m_iEntIndex );
// is this particle bound to an entity?
if (part->m_iEntIndex)
{
if (enable)
{
if(m_iEntAttachment)
{
part->velocity = (source->attachment[m_iEntAttachment - 1] - part->origin)/frametime;
part->origin = source->attachment[m_iEntAttachment - 1];
}
else
{
part->velocity = (source->curstate.origin - part->origin)/frametime;
part->origin = source->curstate.origin;
}
}
else
{
// entity is switched off, die
return false;
}
}
else
{
// not tied to an entity, check whether it's time to die
if (part->age_death >= 0 && part->age > part->age_death)
return false;
// apply acceleration and velocity
vec3_t vecOldPos = part->origin;
if (part->m_fDrag)
VectorMA(part->velocity, -part->m_fDrag*frametime, part->velocity - part->m_vecWind, part->velocity);
VectorMA(part->velocity, frametime, part->accel, part->velocity);
VectorMA(part->origin, frametime, part->velocity, part->origin);
if (part->pType->m_bBouncing)
{
vec3_t vecTarget;
VectorMA(part->origin, frametime, part->velocity, vecTarget);
pmtrace_t *tr = gEngfuncs.PM_TraceLine( part->origin, vecTarget, PM_TRACELINE_PHYSENTSONLY, 2, -1 );
if (tr->fraction < 1)
{
part->origin = tr->endpos;
float bounceforce = DotProduct(tr->plane.normal, part->velocity);
float newspeed = (1 - part->pType->m_BounceFriction.GetInstance());
part->velocity = part->velocity * newspeed;
VectorMA(part->velocity, -bounceforce*(newspeed+part->pType->m_Bounce.GetInstance()), tr->plane.normal, part->velocity);
}
}
}
// spray children
if (part->age_spray && part->age > part->age_spray)
{
part->age_spray = part->age + 1/part->pType->m_SprayRate.GetInstance();
//particle *pChild = ActivateParticle();
if (part->pType->m_pSprayType)
{
particle *pChild = part->pType->m_pSprayType->CreateParticle(this);
if (pChild)
{
pChild->origin = part->origin;
float fSprayForce = part->pType->m_SprayForce.GetInstance();
pChild->velocity = part->velocity;
if (fSprayForce)
{
float fSprayPitch = part->pType->m_SprayPitch.GetInstance() - source->curstate.angles.x;
float fSprayYaw = part->pType->m_SprayYaw.GetInstance() - source->curstate.angles.y;
float fSprayRoll = source->curstate.angles.z;
float fForceCosPitch = fSprayForce*CosLookup(fSprayPitch);
pChild->velocity.x += CosLookup(fSprayYaw) * fForceCosPitch;
pChild->velocity.y += SinLookup(fSprayYaw) * fForceCosPitch + SinLookup(fSprayYaw) * fSprayForce * SinLookup(fSprayRoll);
pChild->velocity.z -= SinLookup(fSprayPitch) * fSprayForce * CosLookup(fSprayRoll);
}
}
}
}
part->m_fSize += part->m_fSizeStep * frametime;
part->m_fAlpha += part->m_fAlphaStep * frametime;
part->m_fRed += part->m_fRedStep * frametime;
part->m_fGreen += part->m_fGreenStep * frametime;
part->m_fBlue += part->m_fBlueStep * frametime;
part->frame += part->m_fFrameStep * frametime;
if (part->m_fAngleStep)
{
part->m_fAngle += part->m_fAngleStep * frametime;
while (part->m_fAngle < 0) part->m_fAngle += 360;
while (part->m_fAngle > 360) part->m_fAngle -= 360;
}
return true;
}
bool ParticleSystem::UpdateParticle( particle *part, float frametime )
{
if( frametime == 0 ) return true;
part->age += frametime;
edict_t *source = GetEntityByIndex( m_iEntIndex );
if( !source ) return false; // total paranoia :)
// is this particle bound to an entity?
if( part->m_iEntIndex )
{
if ( enable )
{
if( m_iEntAttachment )
{
Vector pos = Vector( 0, 0, 0 );
GET_ATTACHMENT( source, m_iEntAttachment, pos, NULL );
if( pos == Vector( 0, 0, 0 )) pos = source->v.origin; // missed attachment
part->velocity = (pos - part->origin ) / frametime;
part->origin = pos;
}
else
{
part->velocity = ( source->v.origin - part->origin ) / frametime;
part->origin = source->v.origin;
}
}
else
{
// entity is switched off, die
return false;
}
}
else
{
// not tied to an entity, check whether it's time to die
if( part->age_death >= 0 && part->age > part->age_death )
return false;
// apply acceleration and velocity
Vector vecOldPos = part->origin;
if ( part->m_fDrag )
part->velocity = part->velocity + (-part->m_fDrag * frametime) * ( part->velocity - part->m_vecWind );
part->velocity = part->velocity + frametime * part->accel;
part->origin = part->origin + frametime * part->velocity;
if( part->pType->m_bBouncing )
{
Vector vecTarget = part->origin + frametime * part->velocity;
TraceResult tr;
TRACE_LINE( part->origin, vecTarget, true, source, &tr );
if( tr.flFraction < 1.0f )
{
part->origin = tr.vecEndPos;
float bounceforce = DotProduct( tr.vecPlaneNormal, part->velocity );
float newspeed = (1.0f - part->pType->m_BounceFriction.GetInstance());
part->velocity = part->velocity * newspeed;
part->velocity = part->velocity + (-bounceforce * ( newspeed + part->pType->m_Bounce.GetInstance())) * tr.vecPlaneNormal;
}
}
}
// spray children
if ( part->age_spray && part->age > part->age_spray )
{
part->age_spray = part->age + 1/part->pType->m_SprayRate.GetInstance();
// particle *pChild = ActivateParticle();
if (part->pType->m_pSprayType)
{
particle *pChild = part->pType->m_pSprayType->CreateParticle(this);
if (pChild)
{
pChild->origin = part->origin;
float fSprayForce = part->pType->m_SprayForce.GetInstance();
pChild->velocity = part->velocity;
if (fSprayForce)
{
float fSprayPitch = part->pType->m_SprayPitch.GetInstance() - source->v.angles.x;
float fSprayYaw = part->pType->m_SprayYaw.GetInstance() - source->v.angles.y;
float fSprayRoll = source->v.angles.z;
float fForceCosPitch = fSprayForce*CosLookup(fSprayPitch);
pChild->velocity.x += CosLookup(fSprayYaw) * fForceCosPitch;
pChild->velocity.y += SinLookup(fSprayYaw) * fForceCosPitch + SinLookup(fSprayYaw) * fSprayForce * SinLookup(fSprayRoll);
pChild->velocity.z -= SinLookup(fSprayPitch) * fSprayForce * CosLookup(fSprayRoll);
}
}
}
}
part->m_fSize += part->m_fSizeStep * frametime;
part->m_fAlpha += part->m_fAlphaStep * frametime;
part->m_fRed += part->m_fRedStep * frametime;
part->m_fGreen += part->m_fGreenStep * frametime;
part->m_fBlue += part->m_fBlueStep * frametime;
part->frame += part->m_fFrameStep * frametime;
if ( part->m_fAngleStep )
{
part->m_fAngle += part->m_fAngleStep * frametime;
while ( part->m_fAngle < 0 ) part->m_fAngle += 360;
while ( part->m_fAngle > 360 ) part->m_fAngle -= 360;
}
return true;
}
void ParticleSystem::DrawParticle( particle *part, Vector &right, Vector &up )
{
float fSize = part->m_fSize;
Vector point1, point2, point3, point4;
Vector origin = part->origin;
// nothing to draw?
if ( fSize == 0 ) return;
// frustrum visible check
if( !ParticleIsVisible( part )) return;
float fCosSize = CosLookup( part->m_fAngle ) * fSize;
float fSinSize = SinLookup( part->m_fAngle ) * fSize;
// calculate the four corners of the sprite
point1 = origin + fSinSize * up;
point1 = point1 + (-fCosSize) * right;
point2 = origin + fCosSize * up;
point2 = point2 + fSinSize * right;
point3 = origin + (-fSinSize) * up;
point3 = point3 + fCosSize * right;
point4 = origin + (-fCosSize) * up;
point4 = point4 + (-fSinSize) * right;
int iContents = 0;
g_engfuncs.pTriAPI->Enable( TRI_SHADER );
for ( particle *pDraw = part; pDraw; pDraw = pDraw->m_pOverlay )
{
if( pDraw->pType->m_SpriteIndex == 0 )
continue;
if ( pDraw->pType->m_iDrawCond )
{
if ( iContents == 0 )
iContents = POINT_CONTENTS( origin );
if ( iContents != pDraw->pType->m_iDrawCond )
continue;
}
int numFrames = GetModelFrames( pDraw->pType->m_SpriteIndex );
// ALERT( at_console, "UpdParticle %d: age %f, life %f, R:%f G:%f, B, %f \n", pDraw->pType->m_hSprite, part->age, part->age_death, pDraw->m_fRed, pDraw->m_fGreen, pDraw->m_fBlue);
// if we've reached the end of the sprite's frames, loop back
while ( pDraw->frame > numFrames )
pDraw->frame -= numFrames;
while ( pDraw->frame < 0 )
pDraw->frame += numFrames;
HSPRITE m_hSprite;
m_hSprite = g_engfuncs.pTriAPI->GetSpriteTexture( pDraw->pType->m_SpriteIndex, int( pDraw->frame ));
g_engfuncs.pTriAPI->RenderMode( pDraw->pType->m_iRenderMode );
g_engfuncs.pTriAPI->Color4f( pDraw->m_fRed, pDraw->m_fGreen, pDraw->m_fBlue, pDraw->m_fAlpha );
g_engfuncs.pTriAPI->Bind( m_hSprite, int( pDraw->frame ));
g_engfuncs.pTriAPI->Begin( TRI_QUADS );
g_engfuncs.pTriAPI->TexCoord2f ( 0, 0 );
g_engfuncs.pTriAPI->Vertex3fv( point1 );
g_engfuncs.pTriAPI->TexCoord2f ( 1, 0 );
g_engfuncs.pTriAPI->Vertex3fv ( point2 );
g_engfuncs.pTriAPI->TexCoord2f ( 1, 1 );
g_engfuncs.pTriAPI->Vertex3fv ( point3 );
g_engfuncs.pTriAPI->TexCoord2f ( 0, 1 );
g_engfuncs.pTriAPI->Vertex3fv ( point4 );
g_engfuncs.pTriAPI->End();
}
g_engfuncs.pTriAPI->Disable( TRI_SHADER );
}
void CParticleSystem :: DrawParticle( CParticle *part, Vector &right, Vector &up )
{
float fSize = part->m_fSize;
// nothing to draw?
if( fSize <= 0 ) return;
// frustrum visible check
if( !ParticleIsVisible( part ))
return;
Vector point1, point2, point3, point4;
Vector origin = part->origin;
float fCosSize = CosLookup( part->m_fAngle ) * fSize;
float fSinSize = SinLookup( part->m_fAngle ) * fSize;
// calculate the four corners of the sprite
point1 = origin + up * fSinSize + right * -fCosSize;
point2 = origin + up * fCosSize + right * fSinSize;
point3 = origin + up * -fSinSize + right * fCosSize;
point4 = origin + up * -fCosSize + right * -fSinSize;
int iContents = CONTENTS_NONE;
model_t *pModel;
for( CParticle *pDraw = part; pDraw; pDraw = pDraw->m_pOverlay )
{
if( !pDraw->pType->m_hSprite )
continue;
if( pDraw->pType->m_iDrawCond )
{
if( pDraw->pType->m_iDrawCond == CONTENT_SPOTLIGHT )
{
if( !R_CountPlights( ))
continue; // fast reject
for( int i = 0; i < MAX_PLIGHTS; i++ )
{
plight_t *pl = &cl_plights[i];
if( pl->die < GET_CLIENT_TIME() || !pl->radius )
continue;
if( !R_CullSphereExt( pl->frustum, part->origin, part->m_fSize + 1, pl->clipflags ))
break; // cone intersected with particle
}
if( i == MAX_PLIGHTS )
continue; // no intersection
}
else
{
if( iContents == CONTENTS_NONE )
iContents = POINT_CONTENTS( origin );
if( iContents != pDraw->pType->m_iDrawCond )
continue;
}
}
pModel = (model_t *)gEngfuncs.GetSpritePointer( pDraw->pType->m_hSprite );
// if we've reached the end of the sprite's frames, loop back
while (pDraw->frame > pModel->numframes)
pDraw->frame -= pModel->numframes;
while (pDraw->frame < 0)
pDraw->frame += pModel->numframes;
if( !TriSpriteTexture( pModel, (int)pDraw->frame ))
continue;
gEngfuncs.pTriAPI->RenderMode( pDraw->pType->m_iRenderMode );
if( m_iLightingModel >= 1 )
{
color24 lightColor;
Vector lightingColor;
if( m_iLightingModel == 1 )
R_LightForPoint( part->origin, &lightColor, false, true, fSize + 1 );
else R_LightForPoint( part->origin, &lightColor, false, true, 0.0f );
// FIXME: this code is totally wrong.
// We need a fake lightmap here like in sprite implementation
lightingColor.x = pDraw->m_fRed * lightColor.r * (1.0f / 255.0f);
lightingColor.y = pDraw->m_fGreen * lightColor.g * (1.0f / 255.0f);
lightingColor.z = pDraw->m_fBlue * lightColor.b * (1.0f / 255.0f);
pglColor4f( lightingColor.x, lightingColor.y, lightingColor.z, pDraw->m_fAlpha );
}
else pglColor4f( pDraw->m_fRed, pDraw->m_fGreen, pDraw->m_fBlue, pDraw->m_fAlpha );
pglBegin( GL_QUADS );
pglTexCoord2f( 0.0f, 0.0f );
pglVertex3fv( point1 );
pglTexCoord2f( 1.0f, 0.0f );
pglVertex3fv( point2 );
pglTexCoord2f( 1.0f, 1.0f );
pglVertex3fv( point3 );
pglTexCoord2f( 0.0f, 1.0f );
pglVertex3fv( point4 );
pglEnd();
if( m_iLightingModel >=2 && R_CountPlights( ))
{
for( int i = 0; i < MAX_PLIGHTS; i++ )
{
plight_t *pl = &cl_plights[i];
if( pl->die < GET_CLIENT_TIME() || !pl->radius )
continue;
if( R_CullSphereExt( pl->frustum, part->origin, part->m_fSize + 1, pl->clipflags ))
continue;
R_BeginDrawProjection( pl );
pglBegin( GL_QUADS );
pglVertex3fv( point1 );
pglVertex3fv( point2 );
pglVertex3fv( point3 );
pglVertex3fv( point4 );
pglEnd();
R_EndDrawProjection();
}
}
}
}
