diff options
| -rw-r--r-- | src/VoronoiMap.cpp | 35 | ||||
| -rw-r--r-- | src/VoronoiMap.h | 31 |
2 files changed, 55 insertions, 11 deletions
diff --git a/src/VoronoiMap.cpp b/src/VoronoiMap.cpp index 5efd09c01..68147ebfc 100644 --- a/src/VoronoiMap.cpp +++ b/src/VoronoiMap.cpp @@ -10,11 +10,13 @@ -cVoronoiMap::cVoronoiMap(int a_Seed, int a_CellSize) : +cVoronoiMap::cVoronoiMap(int a_Seed, int a_CellSize, int a_JitterSize) : m_Noise1(a_Seed + 1), m_Noise2(a_Seed + 2), m_Noise3(a_Seed + 3), - m_CellSize(a_CellSize), + m_CellSize(std::max(a_CellSize, 2)), + m_JitterSize(Clamp(a_JitterSize, 1, a_CellSize)), + m_OddRowOffset(0), m_CurrentCellX(9999999), // Cell coords that are definitely out of the range for normal generator, so that the first query will overwrite them m_CurrentCellZ(9999999) { @@ -26,7 +28,29 @@ cVoronoiMap::cVoronoiMap(int a_Seed, int a_CellSize) : void cVoronoiMap::SetCellSize(int a_CellSize) { + a_CellSize = std::max(a_CellSize, 2); // Cell size must be at least 2 m_CellSize = a_CellSize; + + // For compatibility with previous version, which didn't have the jitter, we set jitter here as well. + m_JitterSize = a_CellSize; +} + + + + + +void cVoronoiMap::SetJitterSize(int a_JitterSize) +{ + m_JitterSize = Clamp(a_JitterSize, 1, m_CellSize); +} + + + + + +void cVoronoiMap::SetOddRowOffset(int a_OddRowOffset) +{ + m_OddRowOffset = Clamp(a_OddRowOffset, -m_CellSize, m_CellSize); } @@ -111,12 +135,13 @@ void cVoronoiMap::UpdateCell(int a_CellX, int a_CellZ) for (int x = 0; x < 5; x++) { int BaseX = (NoiseBaseX + x) * m_CellSize; + int OddRowOffset = ((NoiseBaseX + x) & 0x01) * m_OddRowOffset; for (int z = 0; z < 5; z++) { - int OffsetX = (m_Noise1.IntNoise2DInt(NoiseBaseX + x, NoiseBaseZ + z) / 8) % m_CellSize; - int OffsetZ = (m_Noise2.IntNoise2DInt(NoiseBaseX + x, NoiseBaseZ + z) / 8) % m_CellSize; + int OffsetX = (m_Noise1.IntNoise2DInt(NoiseBaseX + x, NoiseBaseZ + z) / 8) % m_JitterSize; + int OffsetZ = (m_Noise2.IntNoise2DInt(NoiseBaseX + x, NoiseBaseZ + z) / 8) % m_JitterSize; m_SeedX[x][z] = BaseX + OffsetX; - m_SeedZ[x][z] = (NoiseBaseZ + z) * m_CellSize + OffsetZ; + m_SeedZ[x][z] = (NoiseBaseZ + z) * m_CellSize + OddRowOffset + OffsetZ; } // for z } // for x m_CurrentCellX = a_CellX; diff --git a/src/VoronoiMap.h b/src/VoronoiMap.h index 84cf206e9..49f6c1da1 100644 --- a/src/VoronoiMap.h +++ b/src/VoronoiMap.h @@ -18,18 +18,28 @@ class cVoronoiMap { public: - cVoronoiMap(int a_Seed, int a_CellSize = 128); + cVoronoiMap(int a_Seed, int a_CellSize = 128, int a_JitterSize = 128); - /// Sets the cell size used for generating the Voronoi seeds + /** Sets both the cell size and jitter size used for generating the Voronoi seeds. */ void SetCellSize(int a_CellSize); + + /** Sets the jitter size. Clamps it to current cell size. */ + void SetJitterSize(int a_JitterSize); + + /** Sets the offset that is added to each odd row of cells. + This offset makes the voronoi cells align to a non-grid. + Clamps the value to [-m_CellSize, +m_CellSize]. */ + void SetOddRowOffset(int a_OddRowOffset); - /// Returns the value in the cell into which the specified point lies + /** Returns the value in the cell into which the specified point lies. */ int GetValueAt(int a_X, int a_Y); - /// Returns the value in the cell into which the specified point lies, and the distance to the nearest Voronoi seed + /** Returns the value in the cell into which the specified point lies, + and the distance to the nearest Voronoi seed. */ int GetValueAt(int a_X, int a_Y, int & a_MinDistance); - /// Returns the value in the cell into which the specified point lies, and the distances to the 2 nearest Voronoi seeds. Uses a cache + /** Returns the value in the cell into which the specified point lies, + and the distances to the 2 nearest Voronoi seeds. Uses a cache. */ int GetValueAt(int a_X, int a_Y, int & a_MinDistance1, int & a_MinDistance2); protected: @@ -38,8 +48,17 @@ protected: cNoise m_Noise2; cNoise m_Noise3; - /// Size of the Voronoi cells (avg X/Y distance between the seeds) + /** Size of the Voronoi cells (avg X/Y distance between the seeds). Expected to be at least 2. */ int m_CellSize; + + /** The amount that the cell seeds may be offset from the grid. + Expected to be at least 1 and less than m_CellSize. */ + int m_JitterSize; + + /** The constant amount that the cell seeds of every odd row will be offset from the grid. + This allows us to have non-rectangular grids. + Expected to be between -m_CellSize and +m_CellSize. */ + int m_OddRowOffset; /** The X coordinate of the currently cached cell neighborhood */ int m_CurrentCellX; |