void DispInfo_DrawDecals( CDispInfo *visibleDisps[MAX_MAP_DISPINFO], int nVisibleDisps )
{
#ifndef SWDS
VPROF("DispInfo_DrawDecals");
if( !nVisibleDisps )
return;
int nTrisDrawn = 0;
// FIXME: We should bucket all decals (displacement + otherwise)
// and sort them by material enum id + lightmap
// To do this, we need to associate a sort index from 0-n for all
// decals we've seen this level. Then we add those decals to the
// appropriate search list, (sorted by lightmap id)?
for( int i=0; i < nVisibleDisps; i++ )
{
CDispInfo *pDisp = visibleDisps[i];
// Don't bother if there's no decals
if( pDisp->m_FirstDecal == DISP_DECAL_HANDLE_INVALID )
continue;
materialSystemInterface->BindLightmapPage( pDisp->m_pMesh->m_pGroup->m_LightmapPageID );
// At the moment, all decals in a single displacement are sorted by material
// so we get a little batching at least
DispDecalHandle_t d = pDisp->m_FirstDecal;
while( d != DISP_DECAL_HANDLE_INVALID )
{
CDispDecal& decal = s_DispDecals[d];
// Compute decal fragments if we haven't already....
if ((decal.m_Flags & CDispDecalBase::FRAGMENTS_COMPUTED) == 0)
{
pDisp->GenerateDecalFragments( pDisp->m_pPowerInfo->m_RootNode, 0, d, &decal );
}
// Don't draw if there's no triangles
if (decal.m_nTris == 0)
{
d = s_DispDecals.Next(d);
continue;
}
// Now draw all the fragments with this material.
IMaterial* pMaterial = decal.m_pDecal->material;
IMesh *pMesh = materialSystemInterface->GetDynamicMesh( true, NULL, NULL, pMaterial );
CMeshBuilder meshBuilder;
meshBuilder.Begin( pMesh, MATERIAL_TRIANGLES, decal.m_nVerts, decal.m_nTris * 3 );
int baseIndex = 0;
DispDecalFragmentHandle_t f = decal.m_FirstFragment;
while (f != DISP_DECAL_FRAGMENT_HANDLE_INVALID)
{
CDispDecalFragment& fragment = s_DispDecalFragments[f];
int v;
for ( v = 0; v < fragment.m_nVerts - 2; ++v)
{
meshBuilder.Position3fv( fragment.m_pVerts[v].m_vPos.Base() );
meshBuilder.TexCoord2fv( 0, fragment.m_pVerts[v].m_tCoords.Base() );
meshBuilder.TexCoord2fv( 1, fragment.m_pVerts[v].m_LMCoords.Base() );
meshBuilder.AdvanceVertex();
meshBuilder.Index( baseIndex );
meshBuilder.AdvanceIndex();
meshBuilder.Index( v + baseIndex + 1 );
meshBuilder.AdvanceIndex();
meshBuilder.Index( v + baseIndex + 2 );
meshBuilder.AdvanceIndex();
}
meshBuilder.Position3fv( fragment.m_pVerts[v].m_vPos.Base() );
meshBuilder.TexCoord2fv( 0, fragment.m_pVerts[v].m_tCoords.Base() );
meshBuilder.TexCoord2fv( 1, fragment.m_pVerts[v].m_LMCoords.Base() );
meshBuilder.AdvanceVertex();
++v;
meshBuilder.Position3fv( fragment.m_pVerts[v].m_vPos.Base() );
meshBuilder.TexCoord2fv( 0, fragment.m_pVerts[v].m_tCoords.Base() );
meshBuilder.TexCoord2fv( 1, fragment.m_pVerts[v].m_LMCoords.Base() );
meshBuilder.AdvanceVertex();
baseIndex += fragment.m_nVerts;
f = s_DispDecalFragments.Next(f);
}
meshBuilder.End( false, true );
nTrisDrawn += decal.m_nTris * pMaterial->GetNumPasses();
d = s_DispDecals.Next(d);
}
}
g_EngineStats.IncrementCountedStat( ENGINE_STATS_DECAL_TRIANGLES, nTrisDrawn );
#endif
}
