diff options
Diffstat (limited to '')
| -rw-r--r-- | source/BioGen.cpp | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/source/BioGen.cpp b/source/BioGen.cpp index 51e508700..e897e229d 100644 --- a/source/BioGen.cpp +++ b/source/BioGen.cpp @@ -26,6 +26,96 @@ void cBioGenConstant::GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cBioGenCache:
+
+cBioGenCache::cBioGenCache(cBiomeGen * a_BioGenToCache, int a_CacheSize) :
+ m_BioGenToCache(a_BioGenToCache),
+ m_CacheSize(a_CacheSize),
+ m_CacheOrder(new int[a_CacheSize]),
+ m_CacheData(new sCacheData[a_CacheSize]),
+ m_NumHits(0),
+ m_NumMisses(0),
+ m_TotalChain(0)
+{
+ for (int i = 0; i < m_CacheSize; i++)
+ {
+ m_CacheOrder[i] = i;
+ m_CacheData[i].m_ChunkX = 0x7fffffff;
+ m_CacheData[i].m_ChunkZ = 0x7fffffff;
+ }
+}
+
+
+
+
+
+cBioGenCache::~cBioGenCache()
+{
+ delete m_CacheData;
+ delete m_CacheOrder;
+ delete m_BioGenToCache;
+}
+
+
+
+
+
+void cBioGenCache::GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap)
+{
+ if (((m_NumHits + m_NumMisses) % 1024) == 10)
+ {
+ LOGD("BioGenCache: %d hits, %d misses, saved %.2f %%", m_NumHits, m_NumMisses, 100.0 * m_NumHits / (m_NumHits + m_NumMisses));
+ LOGD("BioGenCache: Avg cache chain length: %.2f", (float)m_TotalChain / m_NumHits);
+ }
+
+ for (int i = 0; i < m_CacheSize; i++)
+ {
+ if (
+ (m_CacheData[m_CacheOrder[i]].m_ChunkX != a_ChunkX) ||
+ (m_CacheData[m_CacheOrder[i]].m_ChunkZ != a_ChunkZ)
+ )
+ {
+ continue;
+ }
+ // Found it in the cache
+ int Idx = m_CacheOrder[i];
+
+ // Move to front:
+ for (int j = i; j > 0; j--)
+ {
+ m_CacheOrder[j] = m_CacheOrder[j - 1];
+ }
+ m_CacheOrder[0] = Idx;
+
+ // Use the cached data:
+ memcpy(a_BiomeMap, m_CacheData[Idx].m_BiomeMap, sizeof(a_BiomeMap));
+
+ m_NumHits++;
+ m_TotalChain += i;
+ return;
+ } // for i - cache
+
+ // Not in the cache:
+ m_NumMisses++;
+ m_BioGenToCache->GenBiomes(a_ChunkX, a_ChunkZ, a_BiomeMap);
+
+ // Insert it as the first item in the MRU order:
+ int Idx = m_CacheOrder[m_CacheSize - 1];
+ for (int i = m_CacheSize - 1; i > 0; i--)
+ {
+ m_CacheOrder[i] = m_CacheOrder[i - 1];
+ } // for i - m_CacheOrder[]
+ m_CacheOrder[0] = Idx;
+ memcpy(m_CacheData[Idx].m_BiomeMap, a_BiomeMap, sizeof(a_BiomeMap));
+ m_CacheData[Idx].m_ChunkX = a_ChunkX;
+ m_CacheData[Idx].m_ChunkZ = a_ChunkZ;
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cBiomeGenList:
void cBiomeGenList::InitializeBiomes(const AString & a_Biomes)
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