// Just reuse next decal in list
// A decal that spans multiple surfaces will use multiple decal_t pool entries,
// as each surface needs it's own.
static decal_t *R_DecalAlloc( decal_t *pdecal )
{
int limit = MAX_RENDER_DECALS;
if( r_decals->integer < limit )
limit = r_decals->integer;
if( !limit ) return NULL;
if( !pdecal )
{
int count = 0;
// check for the odd possiblity of infinte loop
do
{
if( gDecalCount >= limit )
gDecalCount = 0;
pdecal = &gDecalPool[gDecalCount]; // reuse next decal
gDecalCount++;
count++;
} while(( pdecal->flags & FDECAL_PERMANENT ) && count < limit );
}
// if decal is already linked to a surface, unlink it.
R_DecalUnlink( pdecal );
return pdecal;
}
/*
===============
R_EntityRemoveDecals
remove all decals from specified entity
===============
*/
void R_EntityRemoveDecals( model_t *mod )
{
msurface_t *psurf;
decal_t *p;
int i;
if( !mod || mod->type != mod_brush )
return;
psurf = &mod->surfaces[mod->firstmodelsurface];
for( i = 0; i < mod->nummodelsurfaces; i++, psurf++ )
{
for( p = psurf->pdecals; p; p = p->pnext )
R_DecalUnlink( p );
}
}
/*
===============
R_ClearAllDecals
remove all decals from anything
used for full decals restart
===============
*/
void R_ClearAllDecals( void )
{
decal_t *pdecal;
int i;
// because gDecalCount may be zeroed after recach the decal limit
for( i = 0; i < MAX_RENDER_DECALS; i++ )
{
pdecal = &gDecalPool[i];
R_DecalUnlink( pdecal );
}
if( clgame.drawFuncs.R_ClearStudioDecals )
{
clgame.drawFuncs.R_ClearStudioDecals();
}
}
static void R_DecalCreate( decalinfo_t *decalinfo, msurface_t *surf, float x, float y )
{
decal_t *pdecal, *pold;
int count, vertCount;
if( !surf )
{
MsgDev( D_ERROR, "psurface NULL in R_DecalCreate!\n" );
return;
}
pold = R_DecalIntersect( decalinfo, surf, &count );
if( count < MAX_OVERLAP_DECALS ) pold = NULL;
pdecal = R_DecalAlloc( pold );
if( !pdecal ) return; // r_decals == 0 ???
pdecal->flags = decalinfo->m_Flags;
VectorCopy( decalinfo->m_Position, pdecal->position );
if( pdecal->flags & FDECAL_USESAXIS )
VectorCopy( decalinfo->m_SAxis, pdecal->saxis );
pdecal->dx = x;
pdecal->dy = y;
pdecal->texture = decalinfo->m_iTexture;
// set scaling
pdecal->scale = decalinfo->m_scale;
pdecal->entityIndex = decalinfo->m_Entity;
// check to see if the decal actually intersects the surface
// if not, then remove the decal
R_DecalVertsClip( pdecal, surf, decalinfo->m_iTexture, &vertCount );
if( !vertCount )
{
R_DecalUnlink( pdecal );
return;
}
// add to the surface's list
R_AddDecalToSurface( pdecal, surf, decalinfo );
}
/*
===============
R_DecalRemoveAll
remove all decals with specified texture
===============
*/
void R_DecalRemoveAll( int textureIndex )
{
decal_t *pdecal;
int i;
if( textureIndex < 0 || textureIndex >= MAX_TEXTURES )
{
MsgDev( D_ERROR, "Decal has invalid texture!\n" );
return;
}
for( i = 0; i < gDecalCount; i++ )
{
pdecal = &gDecalPool[i];
if( !textureIndex || pdecal->texture == textureIndex )
R_DecalUnlink( pdecal );
}
}