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fahhh
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watrabi
@@ -0,0 +1,205 @@
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#pragma once
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#include "util/Vector3int32.h"
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#include <vector>
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namespace RBX { namespace Voxel2 {
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class Cell
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{
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public:
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enum Material
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{
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Material_Air = 0,
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Material_Water = 1,
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Material_Bits = 6,
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Material_Max = (1 << Material_Bits) - 1
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};
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enum Occupancy
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{
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Occupancy_Bits = 8,
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Occupancy_Max = (1 << Occupancy_Bits) - 1
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};
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Cell()
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{
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// we rely on Air being 0 since we use memset elsewhere
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BOOST_STATIC_ASSERT(Material_Air == 0);
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this->material = 0;
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this->occupancy = 0;
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}
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Cell(unsigned char material, unsigned char occupancy)
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{
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RBXASSERT_VERY_FAST(material <= Material_Max && occupancy <= Occupancy_Max);
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// make sure occupancy is always 0 for Air material (0)
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this->material = material;
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this->occupancy = occupancy & (-static_cast<int>(material) >> 31);
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}
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unsigned char getMaterial() const { return material; }
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unsigned char getOccupancy() const { return occupancy; }
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bool operator==(const Cell& other) const { return material == other.material && occupancy == other.occupancy; }
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bool operator!=(const Cell& other) const { return !(*this == other); }
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private:
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unsigned char material;
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unsigned char occupancy;
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};
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class Region
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{
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public:
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Region(const Vector3int32& begin, const Vector3int32& end)
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: begin_(begin)
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, end_(end)
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{
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RBXASSERT_VERY_FAST(begin.x <= end.x && begin.y <= end.y && begin.z <= end.z);
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}
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Region(const Vector3int32& begin, unsigned int size)
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: begin_(begin)
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, end_(begin + Vector3int32(size, size, size))
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{
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}
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static Region fromChunk(const Vector3int32& id, unsigned int chunkSizeLog2)
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{
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return Region(id << chunkSizeLog2, 1 << chunkSizeLog2);
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}
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static Region fromExtents(const Vector3& min, const Vector3& max);
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const Vector3int32& begin() const { return begin_; }
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const Vector3int32& end() const { return end_; }
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Vector3int32 size() const { return end_ - begin_; }
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bool empty() const { return begin_.x == end_.x || begin_.y == end_.y || begin_.z == end_.z; }
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bool operator==(const Region& other) const { return begin_ == other.begin_ && end_ == other.end_; }
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bool operator!=(const Region& other) const { return begin_ != other.begin_ || end_ != other.end_; }
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bool aligned(unsigned int size) const;
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bool inside(const Region& other) const;
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Region intersect(const Region& other) const;
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Region expand(unsigned int size) const;
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Region expandToGrid(unsigned int size) const;
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Region offset(const Vector3int32& offset) const;
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Region downsample(unsigned int lod) const;
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std::vector<Vector3int32> getChunkIds(unsigned int chunkSizeLog2) const;
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unsigned long long getChunkCount(unsigned int chunkSizeLog2) const;
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private:
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Vector3int32 begin_;
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Vector3int32 end_;
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};
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class Box
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{
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public:
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Box();
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Box(int sizeX, int sizeY, int sizeZ);
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const Cell& get(int x, int y, int z) const
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{
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RBXASSERT_VERY_FAST(static_cast<unsigned>(x) < static_cast<unsigned>(sizeX) && static_cast<unsigned>(y) < static_cast<unsigned>(sizeY) && static_cast<unsigned>(z) < static_cast<unsigned>(sizeZ));
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return data.get() ? data[x + sizeX * z + sliceXZ * y] : emptyCell;
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}
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void set(int x, int y, int z, const Cell& cell)
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{
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RBXASSERT_VERY_FAST(static_cast<unsigned>(x) < static_cast<unsigned>(sizeX) && static_cast<unsigned>(y) < static_cast<unsigned>(sizeY) && static_cast<unsigned>(z) < static_cast<unsigned>(sizeZ));
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if (!data) allocate();
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data[x + sizeX * z + sliceXZ * y] = cell;
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}
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const Cell* readRow(int x, int y, int z) const
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{
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RBXASSERT_VERY_FAST(static_cast<unsigned>(x) < static_cast<unsigned>(sizeX) && static_cast<unsigned>(y) < static_cast<unsigned>(sizeY) && static_cast<unsigned>(z) < static_cast<unsigned>(sizeZ));
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RBXASSERT_VERY_FAST(data.get());
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return &data[x + sizeX * z + sliceXZ * y];
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}
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Cell* writeRow(int x, int y, int z)
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{
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RBXASSERT_VERY_FAST(static_cast<unsigned>(x) < static_cast<unsigned>(sizeX) && static_cast<unsigned>(y) < static_cast<unsigned>(sizeY) && static_cast<unsigned>(z) < static_cast<unsigned>(sizeZ));
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if (!data) allocate();
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return &data[x + sizeX * z + sliceXZ * y];
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}
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int getSizeX() const { return sizeX; }
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int getSizeY() const { return sizeY; }
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int getSizeZ() const { return sizeZ; }
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Vector3int32 getSize() const { return Vector3int32(sizeX, sizeY, sizeZ); }
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bool isEmpty() const { return !data; }
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Box clone() const;
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private:
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int sizeX;
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int sizeY;
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int sizeZ;
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int sliceXZ;
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boost::shared_ptr<Cell[]> data;
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static const Cell emptyCell;
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void allocate();
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};
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class GridListener;
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class Grid
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{
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public:
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Grid();
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void connectListener(GridListener* listener);
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void disconnectListener(GridListener* listener);
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Box read(const Region& region, int lod = 0) const;
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void write(const Region& region, const Box& box);
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Cell getCell(int x, int y, int z) const;
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std::vector<Region> getNonEmptyRegions() const;
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std::vector<Region> getNonEmptyRegionsInside(const Region& region) const;
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unsigned int getNonEmptyCellCountApprox() const;
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bool isAllocated() const { return !chunks.empty(); }
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void serialize(std::string& result) const;
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void deserialize(const std::string& result);
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private:
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enum { kChunkMips = 4 };
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struct Chunk
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{
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Box data[kChunkMips];
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unsigned int volume;
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Chunk();
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bool isEmpty() const;
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};
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boost::unordered_map<Vector3int32, Chunk> chunks;
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unsigned int chunksVolume;
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std::vector<GridListener*> listeners;
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};
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} }
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