diff options
Diffstat (limited to 'source/Ravines.cpp')
| -rw-r--r-- | source/Ravines.cpp | 71 |
1 files changed, 60 insertions, 11 deletions
diff --git a/source/Ravines.cpp b/source/Ravines.cpp index 1474c5e8d..332cf0889 100644 --- a/source/Ravines.cpp +++ b/source/Ravines.cpp @@ -9,8 +9,10 @@ +/// How many ravines in each direction are generated for a given chunk. Must be an even number
+static const int NEIGHBORHOOD_SIZE = 8;
-static const int NUM_RAVINE_POINTS = 4; // Should be an odd number
+static const int NUM_RAVINE_POINTS = 4;
@@ -138,12 +140,6 @@ void cStructGenRavines::GenStructures( void cStructGenRavines::GetRavinesForChunk(int a_ChunkX, int a_ChunkZ, cStructGenRavines::cRavines & a_Ravines)
{
- // TODO: Implement proper caching
- // - don't destroy ravines that are reusable
- // - don't create ravines that are already in the cache
-
- ClearCache();
-
int BaseX = a_ChunkX * cChunkDef::Width / m_Size;
int BaseZ = a_ChunkZ * cChunkDef::Width / m_Size;
if (BaseX < 0)
@@ -156,16 +152,69 @@ void cStructGenRavines::GetRavinesForChunk(int a_ChunkX, int a_ChunkZ, cStructGe }
BaseX -= 4;
BaseZ -= 4;
- for (int x = 0; x < 8; x++)
+
+ // Walk the cache, move each ravine that we want into a_Ravines:
+ int StartX = BaseX * m_Size;
+ int EndX = (BaseX + NEIGHBORHOOD_SIZE + 1) * m_Size;
+ int StartZ = BaseZ * m_Size;
+ int EndZ = (BaseZ + NEIGHBORHOOD_SIZE + 1) * m_Size;
+ for (cRavines::iterator itr = m_Cache.begin(), end = m_Cache.end(); itr != end;)
+ {
+ if (
+ ((*itr)->m_BlockX >= StartX) && ((*itr)->m_BlockX < EndX) &&
+ ((*itr)->m_BlockZ >= StartZ) && ((*itr)->m_BlockZ < EndZ)
+ )
+ {
+ // want
+ a_Ravines.push_back(*itr);
+ itr = m_Cache.erase(itr);
+ }
+ else
+ {
+ // don't want
+ ++itr;
+ }
+ } // for itr - m_Cache[]
+
+ for (int x = 0; x < NEIGHBORHOOD_SIZE; x++)
{
int RealX = (BaseX + x) * m_Size;
- for (int z = 0; z < 8; z++)
+ for (int z = 0; z < NEIGHBORHOOD_SIZE; z++)
{
int RealZ = (BaseZ + z) * m_Size;
- m_Cache.push_back(new cRavine(RealX, RealZ, m_Size, m_Noise));
+ bool Found = false;
+ for (cRavines::const_iterator itr = a_Ravines.begin(), end = a_Ravines.end(); itr != end; ++itr)
+ {
+ if (((*itr)->m_BlockX == RealX) && ((*itr)->m_BlockZ == RealZ))
+ {
+ Found = true;
+ break;
+ }
+ }
+ if (!Found)
+ {
+ a_Ravines.push_back(new cRavine(RealX, RealZ, m_Size, m_Noise));
+ }
+ }
+ }
+
+ // Copy a_Ravines into m_Cache to the beginning:
+ cRavines RavinesCopy(a_Ravines);
+ m_Cache.splice(m_Cache.begin(), RavinesCopy, RavinesCopy.begin(), RavinesCopy.end());
+
+ // Trim the cache if it's too long:
+ if (m_Cache.size() > 100)
+ {
+ cRavines::iterator itr = m_Cache.begin();
+ std::advance(itr, 100);
+ for (cRavines::iterator end = m_Cache.end(); itr != end; ++itr)
+ {
+ delete *itr;
}
+ itr = m_Cache.begin();
+ std::advance(itr, 100);
+ m_Cache.erase(itr, m_Cache.end());
}
- a_Ravines = m_Cache;
/*
#ifdef _DEBUG
|