mirror of
https://github.com/OpenMW/openmw.git
synced 2025-10-25 20:56:40 +00:00
370 lines
12 KiB
C++
370 lines
12 KiB
C++
#include "loadland.hpp"
|
|
|
|
#include <algorithm>
|
|
#include <cstdint>
|
|
#include <limits>
|
|
#include <utility>
|
|
|
|
#include <components/esm/defs.hpp>
|
|
#include <components/misc/concepts.hpp>
|
|
|
|
#include "esmreader.hpp"
|
|
#include "esmwriter.hpp"
|
|
|
|
namespace ESM
|
|
{
|
|
namespace
|
|
{
|
|
struct VHGT
|
|
{
|
|
float mHeightOffset;
|
|
std::int8_t mHeightData[LandRecordData::sLandNumVerts];
|
|
};
|
|
|
|
template <Misc::SameAsWithoutCvref<VHGT> T>
|
|
void decompose(T&& v, const auto& f)
|
|
{
|
|
char padding[3] = { 0, 0, 0 };
|
|
f(v.mHeightOffset, v.mHeightData, padding);
|
|
}
|
|
|
|
void transposeTextureData(const std::uint16_t* in, std::uint16_t* out)
|
|
{
|
|
size_t readPos = 0; // bit ugly, but it works
|
|
for (size_t y1 = 0; y1 < 4; y1++)
|
|
for (size_t x1 = 0; x1 < 4; x1++)
|
|
for (size_t y2 = 0; y2 < 4; y2++)
|
|
for (size_t x2 = 0; x2 < 4; x2++)
|
|
out[(y1 * 4 + y2) * 16 + (x1 * 4 + x2)] = in[readPos++];
|
|
}
|
|
|
|
// Loads data and marks it as loaded. Return true if data is actually loaded from reader, false otherwise
|
|
// including the case when data is already loaded.
|
|
bool condLoad(ESMReader& reader, int flags, int& targetFlags, int dataFlag, auto& in)
|
|
{
|
|
if ((targetFlags & dataFlag) == 0 && (flags & dataFlag) != 0)
|
|
{
|
|
if constexpr (std::is_same_v<std::remove_cvref_t<decltype(in)>, VHGT>)
|
|
reader.getSubComposite(in);
|
|
else
|
|
reader.getHT(in);
|
|
targetFlags |= dataFlag;
|
|
return true;
|
|
}
|
|
reader.skipHSub();
|
|
return false;
|
|
}
|
|
}
|
|
|
|
void Land::load(ESMReader& esm, bool& isDeleted)
|
|
{
|
|
isDeleted = false;
|
|
|
|
bool hasLocation = false;
|
|
bool isLoaded = false;
|
|
while (!isLoaded && esm.hasMoreSubs())
|
|
{
|
|
esm.getSubName();
|
|
switch (esm.retSubName().toInt())
|
|
{
|
|
case fourCC("INTV"):
|
|
esm.getHT(mX, mY);
|
|
hasLocation = true;
|
|
break;
|
|
case fourCC("DATA"):
|
|
esm.getHT(mFlags);
|
|
break;
|
|
case SREC_DELE:
|
|
esm.skipHSub();
|
|
isDeleted = true;
|
|
break;
|
|
default:
|
|
esm.cacheSubName();
|
|
isLoaded = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!hasLocation)
|
|
esm.fail("Missing INTV subrecord");
|
|
|
|
mContext = esm.getContext();
|
|
|
|
mLandData = nullptr;
|
|
std::fill(std::begin(mWnam), std::end(mWnam), 0);
|
|
|
|
// Skip the land data here. Load it when the cell is loaded.
|
|
while (esm.hasMoreSubs())
|
|
{
|
|
esm.getSubName();
|
|
switch (esm.retSubName().toInt())
|
|
{
|
|
case fourCC("VNML"):
|
|
esm.skipHSub();
|
|
mDataTypes |= DATA_VNML;
|
|
break;
|
|
case fourCC("VHGT"):
|
|
esm.skipHSub();
|
|
mDataTypes |= DATA_VHGT;
|
|
break;
|
|
case fourCC("WNAM"):
|
|
esm.getHT(mWnam);
|
|
mDataTypes |= DATA_WNAM;
|
|
break;
|
|
case fourCC("VCLR"):
|
|
esm.skipHSub();
|
|
mDataTypes |= DATA_VCLR;
|
|
break;
|
|
case fourCC("VTEX"):
|
|
esm.skipHSub();
|
|
mDataTypes |= DATA_VTEX;
|
|
break;
|
|
default:
|
|
esm.fail("Unknown subrecord");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void Land::save(ESMWriter& esm, bool isDeleted) const
|
|
{
|
|
esm.startSubRecord("INTV");
|
|
esm.writeT(mX);
|
|
esm.writeT(mY);
|
|
esm.endRecord("INTV");
|
|
|
|
esm.writeHNT("DATA", mFlags);
|
|
|
|
if (isDeleted)
|
|
{
|
|
esm.writeHNString("DELE", "", 3);
|
|
return;
|
|
}
|
|
|
|
if (mLandData)
|
|
{
|
|
if (mDataTypes & Land::DATA_VNML)
|
|
{
|
|
esm.writeHNT("VNML", mLandData->mNormals);
|
|
}
|
|
if (mDataTypes & Land::DATA_VHGT)
|
|
{
|
|
VHGT offsets;
|
|
offsets.mHeightOffset = mLandData->mHeights[0] / HEIGHT_SCALE;
|
|
|
|
float prevY = mLandData->mHeights[0];
|
|
size_t number = 0; // avoid multiplication
|
|
for (unsigned i = 0; i < LandRecordData::sLandSize; ++i)
|
|
{
|
|
float diff = (mLandData->mHeights[number] - prevY) / HEIGHT_SCALE;
|
|
offsets.mHeightData[number]
|
|
= diff >= 0 ? static_cast<std::int8_t>(diff + 0.5) : static_cast<std::int8_t>(diff - 0.5);
|
|
|
|
float prevX = prevY = mLandData->mHeights[number];
|
|
++number;
|
|
|
|
for (unsigned j = 1; j < LandRecordData::sLandSize; ++j)
|
|
{
|
|
diff = (mLandData->mHeights[number] - prevX) / HEIGHT_SCALE;
|
|
offsets.mHeightData[number]
|
|
= diff >= 0 ? static_cast<std::int8_t>(diff + 0.5) : static_cast<std::int8_t>(diff - 0.5);
|
|
|
|
prevX = mLandData->mHeights[number];
|
|
++number;
|
|
}
|
|
}
|
|
esm.writeNamedComposite("VHGT", offsets);
|
|
}
|
|
if (mDataTypes & Land::DATA_WNAM)
|
|
{
|
|
// Generate WNAM record
|
|
std::int8_t wnam[LAND_GLOBAL_MAP_LOD_SIZE];
|
|
constexpr float max = std::numeric_limits<std::int8_t>::max();
|
|
constexpr float min = std::numeric_limits<std::int8_t>::min();
|
|
constexpr float vertMult
|
|
= static_cast<float>(LandRecordData::sLandSize - 1) / LAND_GLOBAL_MAP_LOD_SIZE_SQRT;
|
|
for (unsigned row = 0; row < LAND_GLOBAL_MAP_LOD_SIZE_SQRT; ++row)
|
|
{
|
|
for (unsigned col = 0; col < LAND_GLOBAL_MAP_LOD_SIZE_SQRT; ++col)
|
|
{
|
|
float height
|
|
= mLandData->mHeights[static_cast<size_t>(row * vertMult) * LandRecordData::sLandSize
|
|
+ static_cast<size_t>(col * vertMult)];
|
|
height /= height > 0 ? 128.f : 16.f;
|
|
height = std::clamp(height, min, max);
|
|
wnam[row * LAND_GLOBAL_MAP_LOD_SIZE_SQRT + col] = static_cast<std::int8_t>(height);
|
|
}
|
|
}
|
|
esm.writeHNT("WNAM", wnam);
|
|
}
|
|
if (mDataTypes & Land::DATA_VCLR)
|
|
{
|
|
esm.writeHNT("VCLR", mLandData->mColours);
|
|
}
|
|
if (mDataTypes & Land::DATA_VTEX)
|
|
{
|
|
uint16_t vtex[LandRecordData::sLandNumTextures];
|
|
transposeTextureData(mLandData->mTextures.data(), vtex);
|
|
esm.writeHNT("VTEX", vtex);
|
|
}
|
|
}
|
|
}
|
|
|
|
void Land::blank()
|
|
{
|
|
setPlugin(0);
|
|
|
|
mWnam.fill(0);
|
|
|
|
if (mLandData == nullptr)
|
|
mLandData = std::make_unique<LandData>();
|
|
|
|
mLandData->mHeightOffset = 0;
|
|
mLandData->mHeights.fill(0);
|
|
mLandData->mMinHeight = 0;
|
|
mLandData->mMaxHeight = 0;
|
|
for (size_t i = 0; i < LandRecordData::sLandNumVerts; ++i)
|
|
{
|
|
mLandData->mNormals[i * 3 + 0] = 0;
|
|
mLandData->mNormals[i * 3 + 1] = 0;
|
|
mLandData->mNormals[i * 3 + 2] = 127;
|
|
}
|
|
mLandData->mTextures.fill(0);
|
|
mLandData->mColours.fill(255);
|
|
mLandData->mDataLoaded
|
|
= Land::DATA_VNML | Land::DATA_VHGT | Land::DATA_WNAM | Land::DATA_VCLR | Land::DATA_VTEX;
|
|
mDataTypes = mLandData->mDataLoaded;
|
|
|
|
// No file associated with the land now
|
|
mContext.filename.clear();
|
|
}
|
|
|
|
void Land::loadData(int flags) const
|
|
{
|
|
if (mLandData == nullptr)
|
|
mLandData = std::make_unique<LandData>();
|
|
|
|
loadData(flags, *mLandData);
|
|
}
|
|
|
|
void Land::loadData(int flags, LandData& data) const
|
|
{
|
|
// Try to load only available data
|
|
flags = flags & mDataTypes;
|
|
// Return if all required data is loaded
|
|
if ((data.mDataLoaded & flags) == flags)
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (mContext.filename.empty())
|
|
{
|
|
// Make sure there is data, and that it doesn't point to the same object.
|
|
if (mLandData != nullptr && mLandData.get() != &data)
|
|
data = *mLandData;
|
|
|
|
return;
|
|
}
|
|
|
|
ESMReader reader;
|
|
reader.restoreContext(mContext);
|
|
|
|
if (reader.isNextSub("VNML"))
|
|
{
|
|
condLoad(reader, flags, data.mDataLoaded, DATA_VNML, data.mNormals);
|
|
}
|
|
|
|
if (reader.isNextSub("VHGT"))
|
|
{
|
|
VHGT vhgt;
|
|
if (condLoad(reader, flags, data.mDataLoaded, DATA_VHGT, vhgt))
|
|
{
|
|
data.mMinHeight = std::numeric_limits<float>::max();
|
|
data.mMaxHeight = -std::numeric_limits<float>::max();
|
|
float rowOffset = vhgt.mHeightOffset;
|
|
for (unsigned y = 0; y < LandRecordData::sLandSize; y++)
|
|
{
|
|
rowOffset += vhgt.mHeightData[y * LandRecordData::sLandSize];
|
|
|
|
data.mHeights[y * LandRecordData::sLandSize] = rowOffset * HEIGHT_SCALE;
|
|
if (rowOffset * HEIGHT_SCALE > data.mMaxHeight)
|
|
data.mMaxHeight = rowOffset * HEIGHT_SCALE;
|
|
if (rowOffset * HEIGHT_SCALE < data.mMinHeight)
|
|
data.mMinHeight = rowOffset * HEIGHT_SCALE;
|
|
|
|
float colOffset = rowOffset;
|
|
for (unsigned x = 1; x < LandRecordData::sLandSize; x++)
|
|
{
|
|
colOffset += vhgt.mHeightData[y * LandRecordData::sLandSize + x];
|
|
data.mHeights[x + y * LandRecordData::sLandSize] = colOffset * HEIGHT_SCALE;
|
|
|
|
if (colOffset * HEIGHT_SCALE > data.mMaxHeight)
|
|
data.mMaxHeight = colOffset * HEIGHT_SCALE;
|
|
if (colOffset * HEIGHT_SCALE < data.mMinHeight)
|
|
data.mMinHeight = colOffset * HEIGHT_SCALE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (reader.isNextSub("WNAM"))
|
|
reader.skipHSub();
|
|
|
|
if (reader.isNextSub("VCLR"))
|
|
condLoad(reader, flags, data.mDataLoaded, DATA_VCLR, data.mColours);
|
|
if (reader.isNextSub("VTEX"))
|
|
{
|
|
uint16_t vtex[LandRecordData::sLandNumTextures];
|
|
if (condLoad(reader, flags, data.mDataLoaded, DATA_VTEX, vtex))
|
|
{
|
|
transposeTextureData(vtex, data.mTextures.data());
|
|
}
|
|
}
|
|
}
|
|
|
|
void Land::unloadData()
|
|
{
|
|
mLandData = nullptr;
|
|
}
|
|
|
|
bool Land::isDataLoaded(int flags) const
|
|
{
|
|
return mLandData && (mLandData->mDataLoaded & flags) == flags;
|
|
}
|
|
|
|
Land::Land(const Land& land)
|
|
: mFlags(land.mFlags)
|
|
, mX(land.mX)
|
|
, mY(land.mY)
|
|
, mContext(land.mContext)
|
|
, mDataTypes(land.mDataTypes)
|
|
, mWnam(land.mWnam)
|
|
, mLandData(land.mLandData != nullptr ? std::make_unique<LandData>(*land.mLandData) : nullptr)
|
|
{
|
|
}
|
|
|
|
Land& Land::operator=(const Land& land)
|
|
{
|
|
Land copy(land);
|
|
*this = std::move(copy);
|
|
return *this;
|
|
}
|
|
|
|
const Land::LandData* Land::getLandData(int flags) const
|
|
{
|
|
if (!(flags & mDataTypes))
|
|
return nullptr;
|
|
|
|
loadData(flags);
|
|
return mLandData.get();
|
|
}
|
|
|
|
void Land::add(int flags)
|
|
{
|
|
if (mLandData == nullptr)
|
|
mLandData = std::make_unique<LandData>();
|
|
|
|
mDataTypes |= flags;
|
|
mLandData->mDataLoaded |= flags;
|
|
}
|
|
}
|