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147 lines
4.3 KiB
C++
147 lines
4.3 KiB
C++
#ifndef OPENMW_ESM_LAND_H
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#define OPENMW_ESM_LAND_H
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#include <array>
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#include <cstdint>
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#include <memory>
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#include <components/misc/constants.hpp>
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#include "components/esm/defs.hpp"
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#include "components/esm/esmcommon.hpp"
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#include "landrecorddata.hpp"
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namespace ESM
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{
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class ESMReader;
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class ESMWriter;
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/*
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* Landscape data.
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*/
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struct Land
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{
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constexpr static RecNameInts sRecordId = REC_LAND;
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/// Return a string descriptor for this record type. Currently used for debugging / error logs only.
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static std::string_view getRecordType() { return "Land"; }
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Land() = default;
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Land(const Land& land);
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Land(Land&& other) = default;
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Land& operator=(const Land& land);
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Land& operator=(Land&& land) = default;
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// Only first four bits seem to be used, don't know what they mean.
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std::uint32_t mFlags = 0;
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// Map coordinates.
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std::int32_t mX = 0;
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std::int32_t mY = 0;
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// Plugin index, used to reference the correct material palette.
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int getPlugin() const { return mContext.index; }
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void setPlugin(int index) { mContext.index = index; }
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// File context. This allows the ESM reader to be 'reset' to this
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// location later when we are ready to load the full data set.
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// In the editor, there may not be a file associated with the Land,
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// in which case the filename will be empty.
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ESM_Context mContext;
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int mDataTypes = 0;
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enum
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{
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DATA_VNML = 1,
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DATA_VHGT = 2,
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DATA_WNAM = 4,
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DATA_VCLR = 8,
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DATA_VTEX = 16
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};
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enum Flags
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{
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Flag_HeightsNormals = 0x1,
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Flag_Colors = 0x2,
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Flag_Textures = 0x4
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};
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// default height to use in case there is no Land record
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static constexpr int DEFAULT_HEIGHT = -2048;
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// number of vertices per side
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static constexpr int LAND_SIZE = LandRecordData::sLandSize;
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// cell terrain size in world coords
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static constexpr int REAL_SIZE = Constants::CellSizeInUnits;
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// total number of vertices
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static constexpr int LAND_NUM_VERTS = LandRecordData::sLandNumVerts;
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static constexpr int sHeightScale = 8;
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// number of textures per side of land
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static constexpr int LAND_TEXTURE_SIZE = LandRecordData::sLandTextureSize;
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// total number of textures per land
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static constexpr int LAND_NUM_TEXTURES = LandRecordData::sLandNumTextures;
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static constexpr std::size_t sGlobalMapLodSizeSqrt = 9;
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static constexpr std::size_t sGlobalMapLodSize = sGlobalMapLodSizeSqrt * sGlobalMapLodSizeSqrt;
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using LandData = ESM::LandRecordData;
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// low-LOD heightmap (used for rendering the global map)
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std::array<std::int8_t, sGlobalMapLodSize> mWnam;
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mutable std::unique_ptr<LandData> mLandData;
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void load(ESMReader& esm, bool& isDeleted);
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void save(ESMWriter& esm, bool isDeleted = false) const;
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void blank();
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void loadData(int dataTypes) const;
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void loadData(int dataTypes, LandData& data) const;
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/**
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* Frees memory allocated for mLandData
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*/
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void unloadData();
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/// Check if given data type is loaded
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bool isDataLoaded(int flags) const;
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/// Return land data with at least the data types specified in \a flags loaded (if they
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/// are available). Will return a 0-pointer if there is no data for any of the
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/// specified types.
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const LandData* getLandData(int flags) const;
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/// Return land data without loading first anything. Can return a 0-pointer.
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const LandData* getLandData() const { return mLandData.get(); }
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/// Return land data without loading first anything. Can return a 0-pointer.
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LandData* getLandData() { return mLandData.get(); }
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/// \attention Must not be called on objects that aren't fully loaded.
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///
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/// \note Added data fields will be uninitialised
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void add(int flags);
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};
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void loadLandRecordData(int dataTypes, ESMReader& reader, LandRecordData& data);
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void generateWnam(const std::array<float, LandRecordData::sLandNumVerts>& heights,
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std::array<std::int8_t, Land::sGlobalMapLodSize>& wnam);
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}
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#endif
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