015b3a5d19
git-svn-id: http://mc-server.googlecode.com/svn/trunk@699 0a769ca7-a7f5-676a-18bf-c427514a06d6
944 lines
27 KiB
C++
944 lines
27 KiB
C++
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// Caves.cpp
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// Implements the various cave structure generators:
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// - cStructGenWormNestCaves
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// - cStructGenDualRidgeCaves
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// - cStructGenMarbleCaves
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// - cStructGenNetherCaves
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/*
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WormNestCave generator:
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Caves are generated in "nests" - groups of tunnels generated from a single point.
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For each chunk, all the nests that could intersect it are generated.
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For each nest, first the schematic structure is generated (tunnel from ... to ..., branch, tunnel2 from ... to ...)
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Then each tunnel is randomized by inserting points in between its ends.
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Finally each tunnel is smoothed and Bresenham-3D-ed so that it is a collection of spheres with their centers next to each other.
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When the tunnels are ready, they are simply carved into the chunk, one by one.
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To optimize, each tunnel keeps track of its bounding box, so that it can be skipped for chunks that don't intersect it.
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MarbleCaves generator:
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For each voxel a 3D noise function is evaluated, if the value crosses a boundary, the voxel is dug out, otherwise it is kept.
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Problem with this is the amount of CPU work needed for each chunk.
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Also the overall shape of the generated holes is unsatisfactory - there are whole "sheets" of holes in the ground.
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DualRidgeCaves generator:
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Instead of evaluating a single noise function, two different noise functions are multiplied. This produces
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regular tunnels instead of sheets. However due to the sheer amount of CPU work needed, the nosie functions need to be
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reduced in complexity in order for this generator to be useful, so the caves' shapes are "bubbly" at best.
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*/
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#include "Globals.h"
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#include "Caves.h"
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/// How many nests in each direction are generated for a given chunk. Must be an even number
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#define NEIGHBORHOOD_SIZE 8
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struct cDefPoint
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{
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int m_BlockX;
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int m_BlockY;
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int m_BlockZ;
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int m_Radius;
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cDefPoint(int a_BlockX, int a_BlockY, int a_BlockZ, int a_Radius) :
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m_BlockX(a_BlockX),
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m_BlockY(a_BlockY),
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m_BlockZ(a_BlockZ),
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m_Radius(a_Radius)
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{
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}
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} ;
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typedef std::vector<cDefPoint> cDefPoints;
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/// A single non-branching tunnel of a WormNestCave
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class cCaveTunnel
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{
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// The bounding box, including the radii around defpoints:
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int m_MinBlockX, m_MaxBlockX;
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int m_MinBlockY, m_MaxBlockY;
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int m_MinBlockZ, m_MaxBlockZ;
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/// Generates the shaping defpoints for the ravine, based on the ravine block coords and noise
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void Randomize(cNoise & a_Noise);
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/// Refines (adds and smooths) defpoints from a_Src into a_Dst; returns false if no refinement possible (segments too short)
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bool RefineDefPoints(const cDefPoints & a_Src, cDefPoints & a_Dst);
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/// Does rounds of smoothing, two passes of RefineDefPoints(), as long as they return true
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void Smooth(void);
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/// Linearly interpolates the points so that the maximum distance between two neighbors is max 1 block
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void FinishLinear(void);
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/// Calculates the bounding box of the points present
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void CalcBoundingBox(void);
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public:
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cDefPoints m_Points;
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cCaveTunnel(
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int a_BlockStartX, int a_BlockStartY, int a_BlockStartZ, int a_StartRadius,
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int a_BlockEndX, int a_BlockEndY, int a_BlockEndZ, int a_EndRadius,
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cNoise & a_Noise
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);
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/// Carves the tunnel into the chunk specified
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void ProcessChunk(
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int a_ChunkX, int a_ChunkZ,
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cChunkDef::BlockTypes & a_BlockTypes,
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cChunkDef::HeightMap & a_HeightMap
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);
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#ifdef _DEBUG
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AString ExportAsSVG(int a_Color, int a_OffsetX, int a_OffsetZ) const;
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#endif // _DEBUG
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} ;
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typedef std::vector<cCaveTunnel *> cCaveTunnels;
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/// A collection of connected tunnels, possibly branching.
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class cStructGenWormNestCaves::cCaveSystem
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{
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public:
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// The generating block position; is read directly in cStructGenWormNestCaves::GetCavesForChunk()
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int m_BlockX;
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int m_BlockZ;
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cCaveSystem(int a_BlockX, int a_BlockZ, int a_MaxOffset, int a_Size, cNoise & a_Noise);
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~cCaveSystem();
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/// Carves the cave system into the chunk specified
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void ProcessChunk(
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int a_ChunkX, int a_ChunkZ,
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cChunkDef::BlockTypes & a_BlockTypes,
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cChunkDef::HeightMap & a_HeightMap
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);
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#ifdef _DEBUG
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AString ExportAsSVG(int a_Color, int a_OffsetX, int a_OffsetZ) const;
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#endif // _DEBUG
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protected:
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int m_Size;
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cCaveTunnels m_Tunnels;
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void Clear(void);
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/// Generates a_Segment successive tunnels, with possible branches. Generates the same output for the same [x, y, z, a_Segments]
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void GenerateTunnelsFromPoint(
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int a_OriginX, int a_OriginY, int a_OriginZ,
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cNoise & a_Noise, int a_Segments
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);
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} ;
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// cCaveTunnel:
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cCaveTunnel::cCaveTunnel(
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int a_BlockStartX, int a_BlockStartY, int a_BlockStartZ, int a_StartRadius,
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int a_BlockEndX, int a_BlockEndY, int a_BlockEndZ, int a_EndRadius,
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cNoise & a_Noise
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)
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{
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m_Points.push_back(cDefPoint(a_BlockStartX, a_BlockStartY, a_BlockStartZ, a_StartRadius));
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m_Points.push_back(cDefPoint(a_BlockEndX, a_BlockEndY, a_BlockEndZ, a_EndRadius));
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if ((a_BlockStartY <= 0) && (a_BlockEndY <= 0))
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{
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// Don't bother detailing this cave, it's under the world anyway
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return;
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}
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Randomize(a_Noise);
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Smooth();
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// We know that the linear finishing won't affect the bounding box, so let's calculate it now, as we have less data:
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CalcBoundingBox();
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FinishLinear();
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}
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void cCaveTunnel::Randomize(cNoise & a_Noise)
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{
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// Repeat 4 times:
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for (int i = 0; i < 4; i++)
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{
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// For each already present point, insert a point in between it and its predecessor, shifted randomly.
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int PrevX = m_Points.front().m_BlockX;
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int PrevY = m_Points.front().m_BlockY;
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int PrevZ = m_Points.front().m_BlockZ;
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int PrevR = m_Points.front().m_Radius;
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cDefPoints Pts;
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Pts.reserve(m_Points.size() * 2 + 1);
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Pts.push_back(m_Points.front());
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for (cDefPoints::const_iterator itr = m_Points.begin() + 1, end = m_Points.end(); itr != end; ++itr)
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{
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int Random = a_Noise.IntNoise3DInt(PrevX, PrevY, PrevZ + i) / 11;
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int len = (PrevX - itr->m_BlockX) * (PrevX - itr->m_BlockX);
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len += (PrevY - itr->m_BlockY) * (PrevY - itr->m_BlockY);
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len += (PrevZ - itr->m_BlockZ) * (PrevZ - itr->m_BlockZ);
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len = 3 * (int)sqrt((double)len) / 4;
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int Rad = (PrevR + itr->m_Radius) / 2 + (Random % 3) - 1;
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Random /= 4;
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int x = (itr->m_BlockX + PrevX) / 2 + (Random % (len + 1) - len / 2);
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Random /= 256;
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int y = (itr->m_BlockY + PrevY) / 2 + (Random % (len / 2 + 1) - len / 4);
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Random /= 256;
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int z = (itr->m_BlockZ + PrevZ) / 2 + (Random % (len + 1) - len / 2);
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Pts.push_back(cDefPoint(x, y, z, Rad));
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Pts.push_back(*itr);
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PrevX = itr->m_BlockX;
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PrevY = itr->m_BlockY;
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PrevZ = itr->m_BlockZ;
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PrevR = itr->m_Radius;
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}
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std::swap(Pts, m_Points);
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}
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}
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bool cCaveTunnel::RefineDefPoints(const cDefPoints & a_Src, cDefPoints & a_Dst)
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{
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// Smoothing: for each line segment, add points on its 1/4 lengths
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bool res = false;
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int Num = a_Src.size() - 2; // this many intermediary points
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a_Dst.clear();
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a_Dst.reserve(Num * 2 + 2);
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cDefPoints::const_iterator itr = a_Src.begin() + 1;
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a_Dst.push_back(a_Src.front());
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int PrevX = a_Src.front().m_BlockX;
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int PrevY = a_Src.front().m_BlockY;
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int PrevZ = a_Src.front().m_BlockZ;
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int PrevR = a_Src.front().m_Radius;
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for (int i = 0; i <= Num; ++i, ++itr)
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{
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int dx = itr->m_BlockX - PrevX;
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int dy = itr->m_BlockY - PrevY;
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int dz = itr->m_BlockZ - PrevZ;
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if (abs(dx) + abs(dz) + abs(dy) < 6)
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{
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// Too short a segment to smooth-subdivide into quarters
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PrevX = itr->m_BlockX;
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PrevY = itr->m_BlockY;
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PrevZ = itr->m_BlockZ;
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PrevR = itr->m_Radius;
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continue;
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}
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int dr = itr->m_Radius - PrevR;
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int Rad1 = std::max(PrevR + 1 * dr / 4, 1);
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int Rad2 = std::max(PrevR + 3 * dr / 4, 1);
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a_Dst.push_back(cDefPoint(PrevX + 1 * dx / 4, PrevY + 1 * dy / 4, PrevZ + 1 * dz / 4, Rad1));
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a_Dst.push_back(cDefPoint(PrevX + 3 * dx / 4, PrevY + 3 * dy / 4, PrevZ + 3 * dz / 4, Rad2));
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PrevX = itr->m_BlockX;
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PrevY = itr->m_BlockY;
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PrevZ = itr->m_BlockZ;
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PrevR = itr->m_Radius;
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res = true;
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}
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a_Dst.push_back(a_Src.back());
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return res && (a_Src.size() < a_Dst.size());
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}
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void cCaveTunnel::Smooth(void)
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{
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cDefPoints Pts;
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while (true)
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{
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if (!RefineDefPoints(m_Points, Pts))
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{
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std::swap(Pts, m_Points);
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return;
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}
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if (!RefineDefPoints(Pts, m_Points))
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{
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return;
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}
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}
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}
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void cCaveTunnel::FinishLinear(void)
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{
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// For each segment, use Bresenham's 3D line algorithm to draw a "line" of defpoints
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cDefPoints Pts;
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std::swap(Pts, m_Points);
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m_Points.reserve(Pts.size() * 3);
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int PrevX = Pts.front().m_BlockX;
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int PrevY = Pts.front().m_BlockY;
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int PrevZ = Pts.front().m_BlockZ;
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for (cDefPoints::const_iterator itr = Pts.begin() + 1, end = Pts.end(); itr != end; ++itr)
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{
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int x1 = itr->m_BlockX;
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int y1 = itr->m_BlockY;
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int z1 = itr->m_BlockZ;
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int dx = abs(x1 - PrevX);
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int dy = abs(y1 - PrevY);
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int dz = abs(z1 - PrevZ);
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int sx = (PrevX < x1) ? 1 : -1;
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int sy = (PrevY < y1) ? 1 : -1;
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int sz = (PrevZ < z1) ? 1 : -1;
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int err = dx - dz;
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int R = itr->m_Radius;
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if (dx >= std::max(dy, dz)) // x dominant
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{
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int yd = dy - dx / 2;
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int zd = dz - dx / 2;
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while (true)
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{
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m_Points.push_back(cDefPoint(PrevX, PrevY, PrevZ, R));
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if (PrevX == x1)
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{
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break;
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}
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if (yd >= 0) // move along y
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{
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PrevY += sy;
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yd -= dx;
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}
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if (zd >= 0) // move along z
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{
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PrevZ += sz;
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zd -= dx;
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}
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// move along x
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PrevX += sx;
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yd += dy;
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zd += dz;
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}
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}
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else if (dy >= std::max(dx, dz)) // y dominant
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{
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int xd = dx - dy / 2;
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int zd = dz - dy / 2;
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while (true)
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{
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m_Points.push_back(cDefPoint(PrevX, PrevY, PrevZ, R));
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if (PrevY == y1)
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{
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break;
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}
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if (xd >= 0) // move along x
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{
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PrevX += sx;
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xd -= dy;
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}
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if (zd >= 0) // move along z
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{
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PrevZ += sz;
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zd -= dy;
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}
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// move along y
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PrevY += sy;
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xd += dx;
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zd += dz;
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}
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}
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else
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{
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// z dominant
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ASSERT(dz >= std::max(dx, dy));
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int xd = dx - dz / 2;
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int yd = dy - dz / 2;
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while (true)
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{
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m_Points.push_back(cDefPoint(PrevX, PrevY, PrevZ, R));
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if (PrevZ == z1)
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{
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break;
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}
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if (xd >= 0) // move along x
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{
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PrevX += sx;
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xd -= dz;
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}
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if (yd >= 0) // move along y
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{
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PrevY += sy;
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yd -= dz;
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}
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// move along z
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PrevZ += sz;
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xd += dx;
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yd += dy;
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}
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} // if (which dimension is dominant)
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} // for itr
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}
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void cCaveTunnel::CalcBoundingBox(void)
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{
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m_MinBlockX = m_MaxBlockX = m_Points.front().m_BlockX;
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m_MinBlockY = m_MaxBlockY = m_Points.front().m_BlockY;
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m_MinBlockZ = m_MaxBlockZ = m_Points.front().m_BlockZ;
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for (cDefPoints::const_iterator itr = m_Points.begin() + 1, end = m_Points.end(); itr != end; ++itr)
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{
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m_MinBlockX = std::min(m_MinBlockX, itr->m_BlockX - itr->m_Radius);
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m_MaxBlockX = std::max(m_MaxBlockX, itr->m_BlockX + itr->m_Radius);
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m_MinBlockY = std::min(m_MinBlockY, itr->m_BlockY - itr->m_Radius);
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m_MaxBlockY = std::max(m_MaxBlockY, itr->m_BlockY + itr->m_Radius);
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m_MinBlockZ = std::min(m_MinBlockZ, itr->m_BlockZ - itr->m_Radius);
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m_MaxBlockZ = std::max(m_MaxBlockZ, itr->m_BlockZ + itr->m_Radius);
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} // for itr - m_Points[]
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}
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void cCaveTunnel::ProcessChunk(
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int a_ChunkX, int a_ChunkZ,
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cChunkDef::BlockTypes & a_BlockTypes,
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cChunkDef::HeightMap & a_HeightMap
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)
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{
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int BaseX = a_ChunkX * cChunkDef::Width;
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int BaseZ = a_ChunkZ * cChunkDef::Width;
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if (
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(BaseX > m_MaxBlockX) || (BaseX + cChunkDef::Width < m_MinBlockX) ||
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(BaseX > m_MaxBlockX) || (BaseX + cChunkDef::Width < m_MinBlockX)
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)
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{
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// Tunnel does not intersect the chunk at all, bail out
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return;
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}
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int BlockStartX = a_ChunkX * cChunkDef::Width;
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int BlockStartZ = a_ChunkZ * cChunkDef::Width;
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int BlockEndX = BlockStartX + cChunkDef::Width;
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int BlockEndZ = BlockStartZ + cChunkDef::Width;
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for (cDefPoints::const_iterator itr = m_Points.begin(), end = m_Points.end(); itr != end; ++itr)
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{
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if (
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(itr->m_BlockX + itr->m_Radius < BlockStartX) ||
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(itr->m_BlockX - itr->m_Radius > BlockEndX) ||
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(itr->m_BlockZ + itr->m_Radius < BlockStartZ) ||
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(itr->m_BlockZ - itr->m_Radius > BlockEndZ)
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)
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{
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// Cannot intersect, bail out early
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continue;
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}
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// Carve out a sphere around the xyz point, m_Radius in diameter:
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int DifX = itr->m_BlockX - BlockStartX; // substitution for faster calc
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int DifY = itr->m_BlockY;
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int DifZ = itr->m_BlockZ - BlockStartZ; // substitution for faster calc
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int Bottom = std::max(itr->m_BlockY - itr->m_Radius, 1);
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int Top = std::min(itr->m_BlockY + itr->m_Radius, (int)(cChunkDef::Height)); // Stupid gcc needs int cast
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int SqRad = itr->m_Radius * itr->m_Radius;
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for (int z = 0; z < cChunkDef::Width; z++) for (int x = 0; x < cChunkDef::Width; x++)
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{
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for (int y = Bottom; y <= Top; y++)
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{
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int SqDist = (DifX - x) * (DifX - x) + (DifY - y) * (DifY - y) + (DifZ - z) * (DifZ - z);
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if (6 * SqDist <= SqRad)
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{
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cChunkDef::SetBlock(a_BlockTypes, x, y, z, E_BLOCK_AIR);
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}
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} // for y
|
|
} // for x, z
|
|
} // for itr - m_Points[]
|
|
|
|
/*
|
|
#ifdef _DEBUG
|
|
// For debugging purposes, outline the shape of the cave using glowstone, *after* carving the entire cave:
|
|
for (cDefPoints::const_iterator itr = m_Points.begin(), end = m_Points.end(); itr != end; ++itr)
|
|
{
|
|
int DifX = itr->m_BlockX - BlockStartX; // substitution for faster calc
|
|
int DifZ = itr->m_BlockZ - BlockStartZ; // substitution for faster calc
|
|
if (
|
|
(DifX >= 0) && (DifX < cChunkDef::Width) &&
|
|
(itr->m_BlockY > 0) && (itr->m_BlockY < cChunkDef::Height) &&
|
|
(DifZ >= 0) && (DifZ < cChunkDef::Width)
|
|
)
|
|
{
|
|
cChunkDef::SetBlock(a_BlockTypes, DifX, itr->m_BlockY, DifZ, E_BLOCK_GLOWSTONE);
|
|
}
|
|
} // for itr - m_Points[]
|
|
#endif // _DEBUG
|
|
//*/
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
#ifdef _DEBUG
|
|
AString cCaveTunnel::ExportAsSVG(int a_Color, int a_OffsetX, int a_OffsetZ) const
|
|
{
|
|
AString SVG;
|
|
SVG.reserve(m_Points.size() * 20 + 200);
|
|
AppendPrintf(SVG, "<path style=\"fill:none;stroke:#%06x;stroke-width:1px;\"\nd=\"", a_Color);
|
|
char Prefix = 'M'; // The first point needs "M" prefix, all the others need "L"
|
|
for (cDefPoints::const_iterator itr = m_Points.begin(); itr != m_Points.end(); ++itr)
|
|
{
|
|
AppendPrintf(SVG, "%c %d,%d ", Prefix, a_OffsetX + itr->m_BlockX, a_OffsetZ + itr->m_BlockZ);
|
|
Prefix = 'L';
|
|
}
|
|
SVG.append("\"/>\n");
|
|
return SVG;
|
|
}
|
|
#endif // _DEBUG
|
|
|
|
|
|
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// cStructGenWormNestCaves::cCaveSystem:
|
|
|
|
cStructGenWormNestCaves::cCaveSystem::cCaveSystem(int a_BlockX, int a_BlockZ, int a_MaxOffset, int a_Size, cNoise & a_Noise) :
|
|
m_BlockX(a_BlockX),
|
|
m_BlockZ(a_BlockZ),
|
|
m_Size(a_Size)
|
|
{
|
|
int Num = 1 + a_Noise.IntNoise2DInt(a_BlockX, a_BlockZ) % 3;
|
|
for (int i = 0; i < Num; i++)
|
|
{
|
|
int OriginX = a_BlockX + (a_Noise.IntNoise3DInt(13 * a_BlockX, 17 * a_BlockZ, 11 * i) / 19) % a_MaxOffset;
|
|
int OriginZ = a_BlockZ + (a_Noise.IntNoise3DInt(17 * a_BlockX, 13 * a_BlockZ, 11 * i) / 23) % a_MaxOffset;
|
|
int OriginY = 20 + (a_Noise.IntNoise3DInt(19 * a_BlockX, 13 * a_BlockZ, 11 * i) / 17) % 20;
|
|
|
|
// Generate three branches from the origin point:
|
|
// The tunnels generated depend on X, Y, Z and Branches,
|
|
// for the same set of numbers it generates the same offsets!
|
|
// That's why we add a +1 to X in the third line
|
|
GenerateTunnelsFromPoint(OriginX, OriginY, OriginZ, a_Noise, 3);
|
|
GenerateTunnelsFromPoint(OriginX, OriginY, OriginZ, a_Noise, 2);
|
|
GenerateTunnelsFromPoint(OriginX + 1, OriginY, OriginZ, a_Noise, 3);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
cStructGenWormNestCaves::cCaveSystem::~cCaveSystem()
|
|
{
|
|
Clear();
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
void cStructGenWormNestCaves::cCaveSystem::ProcessChunk(
|
|
int a_ChunkX, int a_ChunkZ,
|
|
cChunkDef::BlockTypes & a_BlockTypes,
|
|
cChunkDef::HeightMap & a_HeightMap
|
|
)
|
|
{
|
|
for (cCaveTunnels::const_iterator itr = m_Tunnels.begin(), end = m_Tunnels.end(); itr != end; ++itr)
|
|
{
|
|
(*itr)->ProcessChunk(a_ChunkX, a_ChunkZ, a_BlockTypes, a_HeightMap);
|
|
} // for itr - m_Tunnels[]
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
#ifdef _DEBUG
|
|
AString cStructGenWormNestCaves::cCaveSystem::ExportAsSVG(int a_Color, int a_OffsetX, int a_OffsetZ) const
|
|
{
|
|
AString SVG;
|
|
SVG.reserve(512 * 1024);
|
|
for (cCaveTunnels::const_iterator itr = m_Tunnels.begin(), end = m_Tunnels.end(); itr != end; ++itr)
|
|
{
|
|
SVG.append((*itr)->ExportAsSVG(a_Color, a_OffsetX, a_OffsetZ));
|
|
} // for itr - m_Tunnels[]
|
|
|
|
// Base point highlight:
|
|
AppendPrintf(SVG, "<path style=\"fill:none;stroke:#ff0000;stroke-width:1px;\"\nd=\"M %d,%d L %d,%d\"/>\n",
|
|
a_OffsetX + m_BlockX - 5, a_OffsetZ + m_BlockZ, a_OffsetX + m_BlockX + 5, a_OffsetZ + m_BlockZ
|
|
);
|
|
AppendPrintf(SVG, "<path style=\"fill:none;stroke:#ff0000;stroke-width:1px;\"\nd=\"M %d,%d L %d,%d\"/>\n",
|
|
a_OffsetX + m_BlockX, a_OffsetZ + m_BlockZ - 5, a_OffsetX + m_BlockX, a_OffsetZ + m_BlockZ + 5
|
|
);
|
|
|
|
// A gray line from the base point to the first point of the ravine, for identification:
|
|
AppendPrintf(SVG, "<path style=\"fill:none;stroke:#cfcfcf;stroke-width:1px;\"\nd=\"M %d,%d L %d,%d\"/>\n",
|
|
a_OffsetX + m_BlockX, a_OffsetZ + m_BlockZ,
|
|
a_OffsetX + m_Tunnels.front()->m_Points.front().m_BlockX,
|
|
a_OffsetZ + m_Tunnels.front()->m_Points.front().m_BlockZ
|
|
);
|
|
|
|
// Offset guides:
|
|
if (a_OffsetX > 0)
|
|
{
|
|
AppendPrintf(SVG, "<path style=\"fill:none;stroke:#0000ff;stroke-width:1px;\"\nd=\"M %d,0 L %d,1024\"/>\n",
|
|
a_OffsetX, a_OffsetX
|
|
);
|
|
}
|
|
if (a_OffsetZ > 0)
|
|
{
|
|
AppendPrintf(SVG, "<path style=\"fill:none;stroke:#0000ff;stroke-width:1px;\"\nd=\"M 0,%d L 1024,%d\"/>\n",
|
|
a_OffsetZ, a_OffsetZ
|
|
);
|
|
}
|
|
|
|
return SVG;
|
|
}
|
|
#endif // _DEBUG
|
|
|
|
|
|
|
|
|
|
|
|
void cStructGenWormNestCaves::cCaveSystem::Clear(void)
|
|
{
|
|
for (cCaveTunnels::const_iterator itr = m_Tunnels.begin(), end = m_Tunnels.end(); itr != end; ++itr)
|
|
{
|
|
delete *itr;
|
|
}
|
|
m_Tunnels.clear();
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void cStructGenWormNestCaves::cCaveSystem::GenerateTunnelsFromPoint(
|
|
int a_OriginX, int a_OriginY, int a_OriginZ,
|
|
cNoise & a_Noise, int a_NumSegments
|
|
)
|
|
{
|
|
int DoubleSize = m_Size * 2;
|
|
int Radius = 2 + (a_Noise.IntNoise3DInt(a_OriginX + a_OriginY, a_OriginY + a_OriginZ, a_OriginZ + a_OriginX) / 11) % 10;
|
|
for (int i = a_NumSegments - 1; i >= 0; --i)
|
|
{
|
|
int EndX = a_OriginX + (((a_Noise.IntNoise3DInt(a_OriginX, a_OriginY, a_OriginZ + 11 * a_NumSegments) / 7) % DoubleSize) - m_Size) / 2;
|
|
int EndY = a_OriginY + (((a_Noise.IntNoise3DInt(a_OriginY, 13 * a_NumSegments, a_OriginZ + a_OriginX) / 7) % DoubleSize) - m_Size) / 4;
|
|
int EndZ = a_OriginZ + (((a_Noise.IntNoise3DInt(a_OriginZ + 17 * a_NumSegments, a_OriginX, a_OriginY) / 7) % DoubleSize) - m_Size) / 2;
|
|
int EndR = 2 + (a_Noise.IntNoise3DInt(a_OriginX + 7 * i, a_OriginY + 11 * i, a_OriginZ + a_OriginX) / 11) % 10;
|
|
m_Tunnels.push_back(new cCaveTunnel(a_OriginX, a_OriginY, a_OriginZ, Radius, EndX, EndY, EndZ, EndR, a_Noise));
|
|
GenerateTunnelsFromPoint(EndX, EndY, EndZ, a_Noise, i);
|
|
a_OriginX = EndX;
|
|
a_OriginY = EndY;
|
|
a_OriginZ = EndZ;
|
|
Radius = EndR;
|
|
} // for i - a_NumSegments
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// cStructGenWormNestCaves:
|
|
|
|
cStructGenWormNestCaves::~cStructGenWormNestCaves()
|
|
{
|
|
ClearCache();
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void cStructGenWormNestCaves::ClearCache(void)
|
|
{
|
|
for (cCaveSystems::const_iterator itr = m_Cache.begin(), end = m_Cache.end(); itr != end; ++itr)
|
|
{
|
|
delete *itr;
|
|
} // for itr - m_Cache[]
|
|
m_Cache.clear();
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void cStructGenWormNestCaves::GenStructures(
|
|
int a_ChunkX, int a_ChunkZ,
|
|
cChunkDef::BlockTypes & a_BlockTypes, // Block types to read and change
|
|
cChunkDef::BlockNibbles & a_BlockMeta, // Block meta to read and change
|
|
cChunkDef::HeightMap & a_HeightMap, // Height map to read and change by the current data
|
|
cEntityList & a_Entities, // Entities may be added or deleted
|
|
cBlockEntityList & a_BlockEntities // Block entities may be added or deleted
|
|
)
|
|
{
|
|
cCaveSystems Caves;
|
|
GetCavesForChunk(a_ChunkX, a_ChunkZ, Caves);
|
|
for (cCaveSystems::const_iterator itr = Caves.begin(); itr != Caves.end(); ++itr)
|
|
{
|
|
(*itr)->ProcessChunk(a_ChunkX, a_ChunkZ, a_BlockTypes, a_HeightMap);
|
|
} // for itr - Caves[]
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void cStructGenWormNestCaves::GetCavesForChunk(int a_ChunkX, int a_ChunkZ, cStructGenWormNestCaves::cCaveSystems & a_Caves)
|
|
{
|
|
int BaseX = a_ChunkX * cChunkDef::Width / m_Grid;
|
|
int BaseZ = a_ChunkZ * cChunkDef::Width / m_Grid;
|
|
if (BaseX < 0)
|
|
{
|
|
--BaseX;
|
|
}
|
|
if (BaseZ < 0)
|
|
{
|
|
--BaseZ;
|
|
}
|
|
BaseX -= NEIGHBORHOOD_SIZE / 2;
|
|
BaseZ -= NEIGHBORHOOD_SIZE / 2;
|
|
|
|
// Walk the cache, move each cave system that we want into a_Caves:
|
|
int StartX = BaseX * m_Grid;
|
|
int EndX = (BaseX + NEIGHBORHOOD_SIZE + 1) * m_Grid;
|
|
int StartZ = BaseZ * m_Grid;
|
|
int EndZ = (BaseZ + NEIGHBORHOOD_SIZE + 1) * m_Grid;
|
|
for (cCaveSystems::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_Caves.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_Grid;
|
|
for (int z = 0; z < NEIGHBORHOOD_SIZE; z++)
|
|
{
|
|
int RealZ = (BaseZ + z) * m_Grid;
|
|
bool Found = false;
|
|
for (cCaveSystems::const_iterator itr = a_Caves.begin(), end = a_Caves.end(); itr != end; ++itr)
|
|
{
|
|
if (((*itr)->m_BlockX == RealX) && ((*itr)->m_BlockZ == RealZ))
|
|
{
|
|
Found = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!Found)
|
|
{
|
|
a_Caves.push_back(new cCaveSystem(RealX, RealZ, m_MaxOffset, m_Size, m_Noise));
|
|
}
|
|
}
|
|
}
|
|
|
|
// Copy a_Caves into m_Cache to the beginning:
|
|
cCaveSystems CavesCopy(a_Caves);
|
|
m_Cache.splice(m_Cache.begin(), CavesCopy, CavesCopy.begin(), CavesCopy.end());
|
|
|
|
// Trim the cache if it's too long:
|
|
if (m_Cache.size() > 100)
|
|
{
|
|
cCaveSystems::iterator itr = m_Cache.begin();
|
|
std::advance(itr, 100);
|
|
for (cCaveSystems::const_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());
|
|
}
|
|
|
|
/*
|
|
// Uncomment this block for debugging the caves' shapes in 2D using an SVG export
|
|
#ifdef _DEBUG
|
|
AString SVG;
|
|
SVG.append("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"1024\" height = \"1024\">\n");
|
|
SVG.reserve(2 * 1024 * 1024);
|
|
for (cCaveSystems::const_iterator itr = a_Caves.begin(), end = a_Caves.end(); itr != end; ++itr)
|
|
{
|
|
int Color = 0x10 * abs((*itr)->m_BlockX / m_Grid);
|
|
Color |= 0x1000 * abs((*itr)->m_BlockZ / m_Grid);
|
|
SVG.append((*itr)->ExportAsSVG(Color, 512, 512));
|
|
}
|
|
SVG.append("</svg>\n");
|
|
|
|
AString fnam;
|
|
Printf(fnam, "wnc\\%03d_%03d.svg", a_ChunkX, a_ChunkZ);
|
|
cFile File(fnam, cFile::fmWrite);
|
|
File.Write(SVG.c_str(), SVG.size());
|
|
#endif // _DEBUG
|
|
//*/
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// cStructGenMarbleCaves:
|
|
|
|
static float GetMarbleNoise( float x, float y, float z, cNoise & a_Noise )
|
|
{
|
|
static const float PI_2 = 1.57079633f;
|
|
float oct1 = (a_Noise.CubicNoise3D(x * 0.1f, y * 0.1f, z * 0.1f )) * 4;
|
|
|
|
oct1 = oct1 * oct1 * oct1;
|
|
if (oct1 < 0.f) oct1 = PI_2;
|
|
if (oct1 > PI_2) oct1 = PI_2;
|
|
|
|
return oct1;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void cStructGenMarbleCaves::GenStructures(
|
|
int a_ChunkX, int a_ChunkZ,
|
|
cChunkDef::BlockTypes & a_BlockTypes, // Block types to read and change
|
|
cChunkDef::BlockNibbles & a_BlockMeta, // Block meta to read and change
|
|
cChunkDef::HeightMap & a_HeightMap, // Height map to read and change by the current data
|
|
cEntityList & a_Entities, // Entities may be added or deleted
|
|
cBlockEntityList & a_BlockEntities // Block entities may be added or deleted
|
|
)
|
|
{
|
|
cNoise Noise(m_Seed);
|
|
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 Top = cChunkDef::GetHeight(a_HeightMap, x, z);
|
|
for (int y = 1; y < Top; ++y )
|
|
{
|
|
if (cChunkDef::GetBlock(a_BlockTypes, x, y, z) != E_BLOCK_STONE)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
const float yy = (float)y;
|
|
const float WaveNoise = 1;
|
|
if (cosf(GetMarbleNoise(xx, yy * 0.5f, zz, Noise)) * fabs(cosf(yy * 0.2f + WaveNoise * 2) * 0.75f + WaveNoise) > 0.0005f)
|
|
{
|
|
cChunkDef::SetBlock(a_BlockTypes, x, y, z, E_BLOCK_AIR);
|
|
}
|
|
} // for y
|
|
} // for x
|
|
} // for z
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// cStructGenDualRidgeCaves:
|
|
|
|
void cStructGenDualRidgeCaves::GenStructures(
|
|
int a_ChunkX, int a_ChunkZ,
|
|
cChunkDef::BlockTypes & a_BlockTypes, // Block types to read and change
|
|
cChunkDef::BlockNibbles & a_BlockMeta, // Block meta to read and change
|
|
cChunkDef::HeightMap & a_HeightMap, // Height map to read and change by the current data
|
|
cEntityList & a_Entities, // Entities may be added or deleted
|
|
cBlockEntityList & a_BlockEntities // Block entities may be added or deleted
|
|
)
|
|
{
|
|
cNoise Noise1(m_Seed);
|
|
cNoise Noise2(2 * m_Seed + 19999);
|
|
for (int z = 0; z < cChunkDef::Width; z++)
|
|
{
|
|
const float zz = (float)(a_ChunkZ * cChunkDef::Width + z) / 10;
|
|
for (int x = 0; x < cChunkDef::Width; x++)
|
|
{
|
|
const float xx = (float)(a_ChunkX * cChunkDef::Width + x) / 10;
|
|
|
|
int Top = cChunkDef::GetHeight(a_HeightMap, x, z);
|
|
for (int y = 1; y <= Top; ++y)
|
|
{
|
|
/*
|
|
if (cChunkDef::GetBlock(a_BlockTypes, x, y, z) != E_BLOCK_STONE)
|
|
{
|
|
continue;
|
|
}
|
|
*/
|
|
|
|
const float yy = (float)y / 10;
|
|
const float WaveNoise = 1;
|
|
float n1 = Noise1.CubicNoise3D(xx, yy, zz);
|
|
float n2 = Noise2.CubicNoise3D(xx, yy, zz);
|
|
float n3 = Noise1.CubicNoise3D(xx * 4, yy * 4, zz * 4) / 4;
|
|
float n4 = Noise2.CubicNoise3D(xx * 4, yy * 4, zz * 4) / 4;
|
|
if ((abs(n1 + n3) * abs(n2 + n4)) > m_Threshold)
|
|
{
|
|
cChunkDef::SetBlock(a_BlockTypes, x, y, z, E_BLOCK_AIR);
|
|
}
|
|
} // for y
|
|
} // for x
|
|
} // for z
|
|
}
|
|
|
|
|
|
|
|
|