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610 lines
23 KiB
C++
610 lines
23 KiB
C++
#include "storage.hpp"
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#include <set>
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#include <osg/Image>
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#include <osg/Plane>
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#include <components/debug/debuglog.hpp>
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#include <components/misc/resourcehelpers.hpp>
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#include <components/misc/strings/algorithm.hpp>
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#include <components/vfs/manager.hpp>
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namespace ESMTerrain
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{
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class LandCache
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{
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public:
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typedef std::map<std::pair<int, int>, osg::ref_ptr<const LandObject>> Map;
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Map mMap;
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};
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LandObject::LandObject()
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: mLand(nullptr)
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, mLoadFlags(0)
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{
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}
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LandObject::LandObject(const ESM::Land* land, int loadFlags)
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: mLand(land)
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, mLoadFlags(loadFlags)
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{
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mLand->loadData(mLoadFlags, &mData);
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}
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LandObject::LandObject(const LandObject& copy, const osg::CopyOp& copyop)
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: mLand(nullptr)
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, mLoadFlags(0)
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{
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}
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LandObject::~LandObject() {}
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const float defaultHeight = ESM::Land::DEFAULT_HEIGHT;
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Storage::Storage(const VFS::Manager* vfs, const std::string& normalMapPattern,
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const std::string& normalHeightMapPattern, bool autoUseNormalMaps, const std::string& specularMapPattern,
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bool autoUseSpecularMaps)
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: mVFS(vfs)
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, mNormalMapPattern(normalMapPattern)
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, mNormalHeightMapPattern(normalHeightMapPattern)
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, mAutoUseNormalMaps(autoUseNormalMaps)
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, mSpecularMapPattern(specularMapPattern)
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, mAutoUseSpecularMaps(autoUseSpecularMaps)
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{
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}
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bool Storage::getMinMaxHeights(float size, const osg::Vec2f& center, float& min, float& max)
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{
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assert(size <= 1 && "Storage::getMinMaxHeights, chunk size should be <= 1 cell");
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osg::Vec2f origin = center - osg::Vec2f(size / 2.f, size / 2.f);
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int cellX = static_cast<int>(std::floor(origin.x()));
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int cellY = static_cast<int>(std::floor(origin.y()));
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int startRow = (origin.x() - cellX) * ESM::Land::LAND_SIZE;
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int startColumn = (origin.y() - cellY) * ESM::Land::LAND_SIZE;
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int endRow = startRow + size * (ESM::Land::LAND_SIZE - 1) + 1;
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int endColumn = startColumn + size * (ESM::Land::LAND_SIZE - 1) + 1;
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osg::ref_ptr<const LandObject> land = getLand(cellX, cellY);
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const ESM::Land::LandData* data = land ? land->getData(ESM::Land::DATA_VHGT) : nullptr;
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if (data)
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{
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min = std::numeric_limits<float>::max();
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max = -std::numeric_limits<float>::max();
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for (int row = startRow; row < endRow; ++row)
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{
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for (int col = startColumn; col < endColumn; ++col)
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{
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float h = data->mHeights[col * ESM::Land::LAND_SIZE + row];
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if (h > max)
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max = h;
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if (h < min)
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min = h;
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}
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}
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return true;
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}
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min = defaultHeight;
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max = defaultHeight;
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return false;
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}
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void Storage::fixNormal(osg::Vec3f& normal, int cellX, int cellY, int col, int row, LandCache& cache)
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{
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while (col >= ESM::Land::LAND_SIZE - 1)
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{
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++cellY;
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col -= ESM::Land::LAND_SIZE - 1;
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}
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while (row >= ESM::Land::LAND_SIZE - 1)
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{
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++cellX;
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row -= ESM::Land::LAND_SIZE - 1;
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}
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while (col < 0)
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{
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--cellY;
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col += ESM::Land::LAND_SIZE - 1;
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}
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while (row < 0)
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{
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--cellX;
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row += ESM::Land::LAND_SIZE - 1;
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}
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const LandObject* land = getLand(cellX, cellY, cache);
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const ESM::Land::LandData* data = land ? land->getData(ESM::Land::DATA_VNML) : nullptr;
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if (data)
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{
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normal.x() = data->mNormals[col * ESM::Land::LAND_SIZE * 3 + row * 3];
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normal.y() = data->mNormals[col * ESM::Land::LAND_SIZE * 3 + row * 3 + 1];
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normal.z() = data->mNormals[col * ESM::Land::LAND_SIZE * 3 + row * 3 + 2];
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normal.normalize();
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}
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else
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normal = osg::Vec3f(0, 0, 1);
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}
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void Storage::averageNormal(osg::Vec3f& normal, int cellX, int cellY, int col, int row, LandCache& cache)
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{
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osg::Vec3f n1, n2, n3, n4;
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fixNormal(n1, cellX, cellY, col + 1, row, cache);
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fixNormal(n2, cellX, cellY, col - 1, row, cache);
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fixNormal(n3, cellX, cellY, col, row + 1, cache);
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fixNormal(n4, cellX, cellY, col, row - 1, cache);
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normal = (n1 + n2 + n3 + n4);
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normal.normalize();
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}
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void Storage::fixColour(osg::Vec4ub& color, int cellX, int cellY, int col, int row, LandCache& cache)
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{
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if (col == ESM::Land::LAND_SIZE - 1)
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{
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++cellY;
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col = 0;
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}
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if (row == ESM::Land::LAND_SIZE - 1)
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{
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++cellX;
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row = 0;
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}
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const LandObject* land = getLand(cellX, cellY, cache);
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const ESM::Land::LandData* data = land ? land->getData(ESM::Land::DATA_VCLR) : nullptr;
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if (data)
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{
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color.r() = data->mColours[col * ESM::Land::LAND_SIZE * 3 + row * 3];
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color.g() = data->mColours[col * ESM::Land::LAND_SIZE * 3 + row * 3 + 1];
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color.b() = data->mColours[col * ESM::Land::LAND_SIZE * 3 + row * 3 + 2];
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}
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else
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{
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color.r() = 255;
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color.g() = 255;
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color.b() = 255;
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}
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}
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void Storage::fillVertexBuffers(int lodLevel, float size, const osg::Vec2f& center,
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osg::ref_ptr<osg::Vec3Array> positions, osg::ref_ptr<osg::Vec3Array> normals,
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osg::ref_ptr<osg::Vec4ubArray> colours)
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{
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// LOD level n means every 2^n-th vertex is kept
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size_t increment = static_cast<size_t>(1) << lodLevel;
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osg::Vec2f origin = center - osg::Vec2f(size / 2.f, size / 2.f);
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int startCellX = static_cast<int>(std::floor(origin.x()));
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int startCellY = static_cast<int>(std::floor(origin.y()));
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size_t numVerts = static_cast<size_t>(size * (ESM::Land::LAND_SIZE - 1) / increment + 1);
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positions->resize(numVerts * numVerts);
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normals->resize(numVerts * numVerts);
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colours->resize(numVerts * numVerts);
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osg::Vec3f normal;
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osg::Vec4ub color;
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float vertY = 0;
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float vertX = 0;
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LandCache cache;
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bool alteration = useAlteration();
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float vertY_ = 0; // of current cell corner
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for (int cellY = startCellY; cellY < startCellY + std::ceil(size); ++cellY)
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{
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float vertX_ = 0; // of current cell corner
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for (int cellX = startCellX; cellX < startCellX + std::ceil(size); ++cellX)
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{
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const LandObject* land = getLand(cellX, cellY, cache);
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const ESM::Land::LandData* heightData = nullptr;
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const ESM::Land::LandData* normalData = nullptr;
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const ESM::Land::LandData* colourData = nullptr;
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if (land)
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{
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heightData = land->getData(ESM::Land::DATA_VHGT);
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normalData = land->getData(ESM::Land::DATA_VNML);
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colourData = land->getData(ESM::Land::DATA_VCLR);
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}
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int rowStart = 0;
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int colStart = 0;
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// Skip the first row / column unless we're at a chunk edge,
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// since this row / column is already contained in a previous cell
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// This is only relevant if we're creating a chunk spanning multiple cells
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if (vertY_ != 0)
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colStart += increment;
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if (vertX_ != 0)
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rowStart += increment;
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// Only relevant for chunks smaller than (contained in) one cell
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rowStart += (origin.x() - startCellX) * ESM::Land::LAND_SIZE;
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colStart += (origin.y() - startCellY) * ESM::Land::LAND_SIZE;
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int rowEnd = std::min(static_cast<int>(rowStart + std::min(1.f, size) * (ESM::Land::LAND_SIZE - 1) + 1),
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static_cast<int>(ESM::Land::LAND_SIZE));
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int colEnd = std::min(static_cast<int>(colStart + std::min(1.f, size) * (ESM::Land::LAND_SIZE - 1) + 1),
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static_cast<int>(ESM::Land::LAND_SIZE));
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vertY = vertY_;
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for (int col = colStart; col < colEnd; col += increment)
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{
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vertX = vertX_;
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for (int row = rowStart; row < rowEnd; row += increment)
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{
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int srcArrayIndex = col * ESM::Land::LAND_SIZE * 3 + row * 3;
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assert(row >= 0 && row < ESM::Land::LAND_SIZE);
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assert(col >= 0 && col < ESM::Land::LAND_SIZE);
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assert(vertX < numVerts);
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assert(vertY < numVerts);
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float height = defaultHeight;
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if (heightData)
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height = heightData->mHeights[col * ESM::Land::LAND_SIZE + row];
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if (alteration)
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height += getAlteredHeight(col, row);
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(*positions)[static_cast<unsigned int>(vertX * numVerts + vertY)]
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= osg::Vec3f((vertX / float(numVerts - 1) - 0.5f) * size * Constants::CellSizeInUnits,
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(vertY / float(numVerts - 1) - 0.5f) * size * Constants::CellSizeInUnits, height);
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if (normalData)
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{
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for (int i = 0; i < 3; ++i)
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normal[i] = normalData->mNormals[srcArrayIndex + i];
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normal.normalize();
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}
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else
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normal = osg::Vec3f(0, 0, 1);
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// Normals apparently don't connect seamlessly between cells
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if (col == ESM::Land::LAND_SIZE - 1 || row == ESM::Land::LAND_SIZE - 1)
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fixNormal(normal, cellX, cellY, col, row, cache);
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// some corner normals appear to be complete garbage (z < 0)
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if ((row == 0 || row == ESM::Land::LAND_SIZE - 1)
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&& (col == 0 || col == ESM::Land::LAND_SIZE - 1))
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averageNormal(normal, cellX, cellY, col, row, cache);
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assert(normal.z() > 0);
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(*normals)[static_cast<unsigned int>(vertX * numVerts + vertY)] = normal;
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if (colourData)
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{
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for (int i = 0; i < 3; ++i)
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color[i] = colourData->mColours[srcArrayIndex + i];
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}
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else
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{
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color.r() = 255;
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color.g() = 255;
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color.b() = 255;
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}
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if (alteration)
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adjustColor(col, row, heightData, color); // Does nothing by default, override in OpenMW-CS
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// Unlike normals, colors mostly connect seamlessly between cells, but not always...
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if (col == ESM::Land::LAND_SIZE - 1 || row == ESM::Land::LAND_SIZE - 1)
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fixColour(color, cellX, cellY, col, row, cache);
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color.a() = 255;
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(*colours)[static_cast<unsigned int>(vertX * numVerts + vertY)] = color;
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++vertX;
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}
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++vertY;
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}
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vertX_ = vertX;
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}
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vertY_ = vertY;
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assert(vertX_ == numVerts); // Ensure we covered whole area
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}
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assert(vertY_ == numVerts); // Ensure we covered whole area
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}
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Storage::UniqueTextureId Storage::getVtexIndexAt(int cellX, int cellY, int x, int y, LandCache& cache)
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{
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// For the first/last row/column, we need to get the texture from the neighbour cell
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// to get consistent blending at the borders
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--x;
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if (x < 0)
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{
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--cellX;
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x += ESM::Land::LAND_TEXTURE_SIZE;
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}
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while (x >= ESM::Land::LAND_TEXTURE_SIZE)
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{
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++cellX;
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x -= ESM::Land::LAND_TEXTURE_SIZE;
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}
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while (
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y >= ESM::Land::LAND_TEXTURE_SIZE) // Y appears to be wrapped from the other side because why the hell not?
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{
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++cellY;
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y -= ESM::Land::LAND_TEXTURE_SIZE;
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}
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assert(x < ESM::Land::LAND_TEXTURE_SIZE);
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assert(y < ESM::Land::LAND_TEXTURE_SIZE);
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const LandObject* land = getLand(cellX, cellY, cache);
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const ESM::Land::LandData* data = land ? land->getData(ESM::Land::DATA_VTEX) : nullptr;
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if (data)
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{
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int tex = data->mTextures[y * ESM::Land::LAND_TEXTURE_SIZE + x];
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if (tex == 0)
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return std::make_pair(0, 0); // vtex 0 is always the base texture, regardless of plugin
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return std::make_pair(tex, land->getPlugin());
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}
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return std::make_pair(0, 0);
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}
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std::string Storage::getTextureName(UniqueTextureId id)
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{
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static constexpr char defaultTexture[] = "textures\\_land_default.dds";
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if (id.first == 0)
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return defaultTexture; // Not sure if the default texture really is hardcoded?
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// NB: All vtex ids are +1 compared to the ltex ids
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const ESM::LandTexture* ltex = getLandTexture(id.first - 1, id.second);
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if (!ltex)
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{
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Log(Debug::Warning) << "Warning: Unable to find land texture index " << id.first - 1 << " in plugin "
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<< id.second << ", using default texture instead";
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return defaultTexture;
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}
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// this is needed due to MWs messed up texture handling
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std::string texture = Misc::ResourceHelpers::correctTexturePath(ltex->mTexture, mVFS);
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return texture;
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}
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void Storage::getBlendmaps(float chunkSize, const osg::Vec2f& chunkCenter, ImageVector& blendmaps,
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std::vector<Terrain::LayerInfo>& layerList)
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{
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osg::Vec2f origin = chunkCenter - osg::Vec2f(chunkSize / 2.f, chunkSize / 2.f);
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int cellX = static_cast<int>(std::floor(origin.x()));
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int cellY = static_cast<int>(std::floor(origin.y()));
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int realTextureSize = ESM::Land::LAND_TEXTURE_SIZE + 1; // add 1 to wrap around next cell
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int rowStart = (origin.x() - cellX) * realTextureSize;
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int colStart = (origin.y() - cellY) * realTextureSize;
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const int blendmapSize = (realTextureSize - 1) * chunkSize + 1;
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// We need to upscale the blendmap 2x with nearest neighbor sampling to look like Vanilla
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const int imageScaleFactor = 2;
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const int blendmapImageSize = blendmapSize * imageScaleFactor;
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LandCache cache;
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std::map<UniqueTextureId, unsigned int> textureIndicesMap;
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for (int y = 0; y < blendmapSize; y++)
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{
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for (int x = 0; x < blendmapSize; x++)
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{
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UniqueTextureId id = getVtexIndexAt(cellX, cellY, x + rowStart, y + colStart, cache);
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std::map<UniqueTextureId, unsigned int>::iterator found = textureIndicesMap.find(id);
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if (found == textureIndicesMap.end())
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{
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unsigned int layerIndex = layerList.size();
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Terrain::LayerInfo info = getLayerInfo(getTextureName(id));
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// look for existing diffuse map, which may be present when several plugins use the same texture
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for (unsigned int i = 0; i < layerList.size(); ++i)
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{
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if (layerList[i].mDiffuseMap == info.mDiffuseMap)
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{
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layerIndex = i;
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break;
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}
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}
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found = textureIndicesMap.emplace(id, layerIndex).first;
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if (layerIndex >= layerList.size())
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{
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osg::ref_ptr<osg::Image> image(new osg::Image);
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image->allocateImage(blendmapImageSize, blendmapImageSize, 1, GL_ALPHA, GL_UNSIGNED_BYTE);
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unsigned char* pData = image->data();
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memset(pData, 0, image->getTotalDataSize());
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blendmaps.emplace_back(image);
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layerList.emplace_back(info);
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}
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}
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unsigned int layerIndex = found->second;
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unsigned char* pData = blendmaps[layerIndex]->data();
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int realY = (blendmapSize - y - 1) * imageScaleFactor;
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int realX = x * imageScaleFactor;
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pData[((realY + 0) * blendmapImageSize + realX + 0)] = 255;
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pData[((realY + 1) * blendmapImageSize + realX + 0)] = 255;
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pData[((realY + 0) * blendmapImageSize + realX + 1)] = 255;
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pData[((realY + 1) * blendmapImageSize + realX + 1)] = 255;
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}
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}
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if (blendmaps.size() == 1)
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blendmaps.clear(); // If a single texture fills the whole terrain, there is no need to blend
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}
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float Storage::getHeightAt(const osg::Vec3f& worldPos)
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{
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int cellX = static_cast<int>(std::floor(worldPos.x() / float(Constants::CellSizeInUnits)));
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int cellY = static_cast<int>(std::floor(worldPos.y() / float(Constants::CellSizeInUnits)));
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osg::ref_ptr<const LandObject> land = getLand(cellX, cellY);
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if (!land)
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return defaultHeight;
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const ESM::Land::LandData* data = land->getData(ESM::Land::DATA_VHGT);
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if (!data)
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return defaultHeight;
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// Mostly lifted from Ogre::Terrain::getHeightAtTerrainPosition
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// Normalized position in the cell
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float nX = (worldPos.x() - (cellX * Constants::CellSizeInUnits)) / float(Constants::CellSizeInUnits);
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float nY = (worldPos.y() - (cellY * Constants::CellSizeInUnits)) / float(Constants::CellSizeInUnits);
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// get left / bottom points (rounded down)
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float factor = ESM::Land::LAND_SIZE - 1.0f;
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float invFactor = 1.0f / factor;
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int startX = static_cast<int>(nX * factor);
|
|
int startY = static_cast<int>(nY * factor);
|
|
int endX = startX + 1;
|
|
int endY = startY + 1;
|
|
|
|
endX = std::min(endX, ESM::Land::LAND_SIZE - 1);
|
|
endY = std::min(endY, ESM::Land::LAND_SIZE - 1);
|
|
|
|
// now get points in terrain space (effectively rounding them to boundaries)
|
|
float startXTS = startX * invFactor;
|
|
float startYTS = startY * invFactor;
|
|
float endXTS = endX * invFactor;
|
|
float endYTS = endY * invFactor;
|
|
|
|
// get parametric from start coord to next point
|
|
float xParam = (nX - startXTS) * factor;
|
|
float yParam = (nY - startYTS) * factor;
|
|
|
|
/* For even / odd tri strip rows, triangles are this shape:
|
|
even odd
|
|
3---2 3---2
|
|
| / | | \ |
|
|
0---1 0---1
|
|
*/
|
|
|
|
// Build all 4 positions in normalized cell space, using point-sampled height
|
|
osg::Vec3f v0(startXTS, startYTS, getVertexHeight(data, startX, startY) / float(Constants::CellSizeInUnits));
|
|
osg::Vec3f v1(endXTS, startYTS, getVertexHeight(data, endX, startY) / float(Constants::CellSizeInUnits));
|
|
osg::Vec3f v2(endXTS, endYTS, getVertexHeight(data, endX, endY) / float(Constants::CellSizeInUnits));
|
|
osg::Vec3f v3(startXTS, endYTS, getVertexHeight(data, startX, endY) / float(Constants::CellSizeInUnits));
|
|
// define this plane in terrain space
|
|
osg::Plane plane;
|
|
// FIXME: deal with differing triangle alignment
|
|
if (true)
|
|
{
|
|
// odd row
|
|
bool secondTri = ((1.0 - yParam) > xParam);
|
|
if (secondTri)
|
|
plane = osg::Plane(v0, v1, v3);
|
|
else
|
|
plane = osg::Plane(v1, v2, v3);
|
|
}
|
|
/*
|
|
else
|
|
{
|
|
// even row
|
|
bool secondTri = (yParam > xParam);
|
|
if (secondTri)
|
|
plane.redefine(v0, v2, v3);
|
|
else
|
|
plane.redefine(v0, v1, v2);
|
|
}
|
|
*/
|
|
|
|
// Solve plane equation for z
|
|
return (-plane.getNormal().x() * nX - plane.getNormal().y() * nY - plane[3]) / plane.getNormal().z()
|
|
* Constants::CellSizeInUnits;
|
|
}
|
|
|
|
const LandObject* Storage::getLand(int cellX, int cellY, LandCache& cache)
|
|
{
|
|
LandCache::Map::iterator found = cache.mMap.find(std::make_pair(cellX, cellY));
|
|
if (found != cache.mMap.end())
|
|
return found->second;
|
|
else
|
|
{
|
|
found = cache.mMap.insert(std::make_pair(std::make_pair(cellX, cellY), getLand(cellX, cellY))).first;
|
|
return found->second;
|
|
}
|
|
}
|
|
|
|
void Storage::adjustColor(int col, int row, const ESM::Land::LandData* heightData, osg::Vec4ub& color) const {}
|
|
|
|
float Storage::getAlteredHeight(int col, int row) const
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
Terrain::LayerInfo Storage::getLayerInfo(const std::string& texture)
|
|
{
|
|
std::lock_guard<std::mutex> lock(mLayerInfoMutex);
|
|
|
|
// Already have this cached?
|
|
std::map<std::string, Terrain::LayerInfo>::iterator found = mLayerInfoMap.find(texture);
|
|
if (found != mLayerInfoMap.end())
|
|
return found->second;
|
|
|
|
Terrain::LayerInfo info;
|
|
info.mParallax = false;
|
|
info.mSpecular = false;
|
|
info.mDiffuseMap = texture;
|
|
|
|
if (mAutoUseNormalMaps)
|
|
{
|
|
std::string texture_ = texture;
|
|
Misc::StringUtils::replaceLast(texture_, ".", mNormalHeightMapPattern + ".");
|
|
if (mVFS->exists(texture_))
|
|
{
|
|
info.mNormalMap = texture_;
|
|
info.mParallax = true;
|
|
}
|
|
else
|
|
{
|
|
texture_ = texture;
|
|
Misc::StringUtils::replaceLast(texture_, ".", mNormalMapPattern + ".");
|
|
if (mVFS->exists(texture_))
|
|
info.mNormalMap = texture_;
|
|
}
|
|
}
|
|
|
|
if (mAutoUseSpecularMaps)
|
|
{
|
|
std::string texture_ = texture;
|
|
Misc::StringUtils::replaceLast(texture_, ".", mSpecularMapPattern + ".");
|
|
if (mVFS->exists(texture_))
|
|
{
|
|
info.mDiffuseMap = texture_;
|
|
info.mSpecular = true;
|
|
}
|
|
}
|
|
|
|
mLayerInfoMap[texture] = info;
|
|
|
|
return info;
|
|
}
|
|
|
|
float Storage::getCellWorldSize()
|
|
{
|
|
return static_cast<float>(ESM::Land::REAL_SIZE);
|
|
}
|
|
|
|
int Storage::getCellVertices()
|
|
{
|
|
return ESM::Land::LAND_SIZE;
|
|
}
|
|
|
|
int Storage::getBlendmapScale(float chunkSize)
|
|
{
|
|
return ESM::Land::LAND_TEXTURE_SIZE * chunkSize;
|
|
}
|
|
|
|
}
|