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authormadmaxoft@gmail.com <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6>2012-09-23 22:14:04 +0200
committermadmaxoft@gmail.com <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6>2012-09-23 22:14:04 +0200
commit881ad8d8dbed920c00ea750fb809797456e0b4fc (patch)
treea24d6e094842a952e5ad5b8739fba52ceb36ba7d /source/Generating/HeiGen.cpp
parentSource files cleanup: Protocol-related files in a separate subfolder (diff)
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Diffstat (limited to 'source/Generating/HeiGen.cpp')
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diff --git a/source/Generating/HeiGen.cpp b/source/Generating/HeiGen.cpp
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+
+// HeiGen.cpp
+
+// Implements the various terrain height generators
+
+#include "Globals.h"
+#include "HeiGen.h"
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cHeiGenFlat:
+
+void cHeiGenFlat::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap)
+{
+ for (int i = 0; i < ARRAYCOUNT(a_HeightMap); i++)
+ {
+ a_HeightMap[i] = m_Height;
+ }
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cHeiGenCache:
+
+cHeiGenCache::cHeiGenCache(cTerrainHeightGen * a_HeiGenToCache, int a_CacheSize) :
+ m_HeiGenToCache(a_HeiGenToCache),
+ 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;
+ }
+}
+
+
+
+
+
+cHeiGenCache::~cHeiGenCache()
+{
+ delete m_CacheData;
+ delete m_CacheOrder;
+ delete m_HeiGenToCache;
+}
+
+
+
+
+
+void cHeiGenCache::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap)
+{
+ if (((m_NumHits + m_NumMisses) % 1024) == 10)
+ {
+ LOGD("HeiGenCache: %d hits, %d misses, saved %.2f %%", m_NumHits, m_NumMisses, 100.0 * m_NumHits / (m_NumHits + m_NumMisses));
+ LOGD("HeiGenCache: 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_HeightMap, m_CacheData[Idx].m_HeightMap, sizeof(a_HeightMap));
+
+ m_NumHits++;
+ m_TotalChain += i;
+ return;
+ } // for i - cache
+
+ // Not in the cache:
+ m_NumMisses++;
+ m_HeiGenToCache->GenHeightMap(a_ChunkX, a_ChunkZ, a_HeightMap);
+
+ // 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_HeightMap, a_HeightMap, sizeof(a_HeightMap));
+ m_CacheData[Idx].m_ChunkX = a_ChunkX;
+ m_CacheData[Idx].m_ChunkZ = a_ChunkZ;
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cHeiGenClassic:
+
+cHeiGenClassic::cHeiGenClassic(int a_Seed, float a_HeightFreq1, float a_HeightAmp1, float a_HeightFreq2, float a_HeightAmp2, float a_HeightFreq3, float a_HeightAmp3) :
+ m_Seed(a_Seed),
+ m_Noise(a_Seed),
+ m_HeightFreq1(a_HeightFreq1),
+ m_HeightAmp1 (a_HeightAmp1),
+ m_HeightFreq2(a_HeightFreq2),
+ m_HeightAmp2 (a_HeightAmp2),
+ m_HeightFreq3(a_HeightFreq3),
+ m_HeightAmp3 (a_HeightAmp3)
+{
+ // Nothing needed yet
+}
+
+
+
+
+
+float cHeiGenClassic::GetNoise(float x, float y)
+{
+ float oct1 = m_Noise.CubicNoise2D(x * m_HeightFreq1, y * m_HeightFreq1) * m_HeightAmp1;
+ float oct2 = m_Noise.CubicNoise2D(x * m_HeightFreq2, y * m_HeightFreq2) * m_HeightAmp2;
+ float oct3 = m_Noise.CubicNoise2D(x * m_HeightFreq3, y * m_HeightFreq3) * m_HeightAmp3;
+
+ float height = m_Noise.CubicNoise2D(x * 0.1f, y * 0.1f ) * 2;
+
+ float flatness = ((m_Noise.CubicNoise2D(x * 0.5f, y * 0.5f) + 1.f) * 0.5f) * 1.1f; // 0 ... 1.5
+ flatness *= flatness * flatness;
+
+ return (oct1 + oct2 + oct3) * flatness + height;
+}
+
+
+
+
+
+void cHeiGenClassic::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap)
+{
+ for (int z = 0; z < cChunkDef::Width; z++)
+ {
+ const float zz = (float)(a_ChunkZ * cChunkDef::Width + z);
+ for (int x = 0; x < cChunkDef::Width; x++)
+ {
+ const float xx = (float)(a_ChunkX * cChunkDef::Width + x);
+
+ int hei = 64 + (int)(GetNoise(xx * 0.05f, zz * 0.05f) * 16);
+ if (hei < 10)
+ {
+ hei = 10;
+ }
+ if (hei > 250)
+ {
+ hei = 250;
+ }
+ cChunkDef::SetHeight(a_HeightMap, x , z, hei);
+ } // for x
+ } // for z
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cHeiGenBiomal:
+
+const cHeiGenBiomal::sGenParam cHeiGenBiomal::m_GenParam[biNumBiomes] =
+{
+ /* Fast-changing | Middle-changing | Slow-changing |*/
+ /* Biome | Freq1 | Amp1 | Freq2 | Amp2 | Freq3 | Amp3 | BaseHeight */
+ /* biOcean */ { 0.1f, 2.0f, 0.05f, 12.0f, 0.01f, 10.0f, 40}, // done
+ /* biPlains */ { 0.1f, 1.0f, 0.05f, 1.5f, 0.01f, 4.0f, 68}, // done
+ /* biDesert */ { 0.1f, 1.0f, 0.05f, 1.5f, 0.01f, 4.0f, 68}, // done
+ /* biExtremeHills */ { 0.2f, 4.0f, 0.05f, 20.0f, 0.01f, 16.0f, 100}, // done
+ /* biForest */ { 0.1f, 1.0f, 0.05f, 2.0f, 0.01f, 4.0f, 70}, // done
+ /* biTaiga */ { 0.1f, 1.0f, 0.05f, 2.0f, 0.01f, 4.0f, 70}, // done
+ /* biSwampland */ { 0.1f, 1.1f, 0.05f, 1.5f, 0.02f, 2.5f, 61.5}, // done
+ /* biRiver */ { 0.2f, 3.0f, 0.05f, 1.0f, 0.01f, 1.0f, 56}, // done
+ /* biNether */ { 0.1f, 0.0f, 0.01f, 0.0f, 0.01f, 0.0f, 0}, // Unused, but must be here due to indexing
+ /* biSky */ { 0.1f, 0.0f, 0.01f, 0.0f, 0.01f, 0.0f, 0}, // Unused, but must be here due to indexing
+ /* biFrozenOcean */ { 0.1f, 2.0f, 0.05f, 12.0f, 0.01f, 10.0f, 40}, // done
+ /* biFrozenRiver */ { 0.2f, 3.0f, 0.05f, 1.0f, 0.01f, 1.0f, 56}, // done
+ /* biIcePlains */ { 0.1f, 1.0f, 0.05f, 1.5f, 0.01f, 4.0f, 68}, // done
+ /* biIceMountains */ { 0.2f, 2.0f, 0.05f, 10.0f, 0.01f, 8.0f, 80}, // done
+ /* biMushroomIsland */ { 0.1f, 2.0f, 0.05f, 8.0f, 0.01f, 6.0f, 80}, // done
+ /* biMushroomShore */ { 0.1f, 1.0f, 0.05f, 2.0f, 0.01f, 4.0f, 64}, // done
+ /* biBeach */ { 0.1f, 0.5f, 0.05f, 1.0f, 0.01f, 1.0f, 64}, // done
+ /* biDesertHills */ { 0.2f, 2.0f, 0.05f, 5.0f, 0.01f, 4.0f, 75}, // done
+ /* biForestHills */ { 0.2f, 2.0f, 0.05f, 12.0f, 0.01f, 10.0f, 80}, // done
+ /* biTaigaHills */ { 0.2f, 2.0f, 0.05f, 12.0f, 0.01f, 10.0f, 80}, // done
+ /* biExtremeHillsEdge */ { 0.2f, 3.0f, 0.05f, 16.0f, 0.01f, 12.0f, 80}, // done
+ /* biJungle */ { 0.1f, 3.0f, 0.05f, 6.0f, 0.01f, 6.0f, 70}, // done
+ /* biJungleHills */ { 0.2f, 3.0f, 0.05f, 12.0f, 0.01f, 10.0f, 80}, // done
+} ;
+
+
+
+
+
+void cHeiGenBiomal::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap)
+{
+ // Generate a 3x3 chunk area of biomes around this chunk:
+ BiomeNeighbors Biomes;
+ for (int z = -1; z <= 1; z++)
+ {
+ for (int x = -1; x <= 1; x++)
+ {
+ m_BiomeGen.GenBiomes(a_ChunkX + x, a_ChunkZ + z, Biomes[x + 1][z + 1]);
+ } // for x
+ } // for z
+
+ // For each height, go through neighboring biomes and add up their idea of height:
+ for (int z = 0; z < cChunkDef::Width; z++)
+ {
+ for (int x = 0; x < cChunkDef::Width; x++)
+ {
+ cChunkDef::SetHeight(a_HeightMap, x, z, GetHeightAt(x, z, a_ChunkX, a_ChunkZ, Biomes));
+ } // for x
+ }
+}
+
+
+
+
+
+HEIGHTTYPE cHeiGenBiomal::GetHeightAt(int a_RelX, int a_RelZ, int a_ChunkX, int a_ChunkZ, const cHeiGenBiomal::BiomeNeighbors & a_BiomeNeighbors)
+{
+ // Sum up how many biomes of each type there are in the neighborhood:
+ int BiomeCounts[biNumBiomes];
+ memset(BiomeCounts, 0, sizeof(BiomeCounts));
+ int Sum = 0;
+ for (int z = -8; z <= 8; z++)
+ {
+ int FinalZ = a_RelZ + z + cChunkDef::Width;
+ int IdxZ = FinalZ / cChunkDef::Width;
+ int ModZ = FinalZ % cChunkDef::Width;
+ int WeightZ = 9 - abs(z);
+ for (int x = -8; x <= 8; x++)
+ {
+ int FinalX = a_RelX + x + cChunkDef::Width;
+ int IdxX = FinalX / cChunkDef::Width;
+ int ModX = FinalX % cChunkDef::Width;
+ EMCSBiome Biome = cChunkDef::GetBiome(a_BiomeNeighbors[IdxX][IdxZ], ModX, ModZ);
+ if ((Biome < 0) || (Biome >= ARRAYCOUNT(BiomeCounts)))
+ {
+ continue;
+ }
+ int WeightX = 9 - abs(x);
+ BiomeCounts[Biome] += WeightX + WeightZ;
+ Sum += WeightX + WeightZ;
+ } // for x
+ } // for z
+
+ // For each biome type that has a nonzero count, calc its height and add it:
+ if (Sum > 0)
+ {
+ int Height = 0;
+ int BlockX = a_ChunkX * cChunkDef::Width + a_RelX;
+ int BlockZ = a_ChunkZ * cChunkDef::Width + a_RelZ;
+ for (int i = 0; i < ARRAYCOUNT(BiomeCounts); i++)
+ {
+ if (BiomeCounts[i] == 0)
+ {
+ continue;
+ }
+ float oct1 = m_Noise.CubicNoise2D(BlockX * m_GenParam[i].m_HeightFreq1, BlockZ * m_GenParam[i].m_HeightFreq1) * m_GenParam[i].m_HeightAmp1;
+ float oct2 = m_Noise.CubicNoise2D(BlockX * m_GenParam[i].m_HeightFreq2, BlockZ * m_GenParam[i].m_HeightFreq2) * m_GenParam[i].m_HeightAmp2;
+ float oct3 = m_Noise.CubicNoise2D(BlockX * m_GenParam[i].m_HeightFreq3, BlockZ * m_GenParam[i].m_HeightFreq3) * m_GenParam[i].m_HeightAmp3;
+ Height += BiomeCounts[i] * (int)(m_GenParam[i].m_BaseHeight + oct1 + oct2 + oct3);
+ }
+ int res = (HEIGHTTYPE)(Height / Sum);
+ return std::min(250, std::max(res, 5));
+ }
+
+ // No known biome around? Weird. Return a bogus value:
+ ASSERT(!"cHeiGenBiomal: Biome sum failed, no known biome around");
+ return 5;
+}
+
+
+
+
+