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OpenMW is an open implementation of the Morrowind engine
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225/* Copyright (C) 2015 - 2024 cc9cii
This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software.
Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. 3. This notice may not be removed or altered from any source distribution.
cc9cii cc9cii@hotmail.com
Much of the information on the data structures are based on the information from Tes4Mod:Mod_File_Format and Tes5Mod:File_Formats but also refined by trial & error. See http://en.uesp.net/wiki for details.
*/#include "loadland.hpp"
#include <cassert>#include <cstdint>#include <stdexcept>
#include <components/debug/debuglog.hpp>
#include "reader.hpp"
namespace{ void assignDefaultTextures(ESM4::Land& land, ESM4::Reader& reader) { std::uint32_t esmVer = reader.esmVersion();
// Note: in games after TES4 it can be configured in ini file (sDefaultLandDiffuseTexture) if (!reader.hasFormVersion() && (esmVer == ESM::VER_080 || esmVer == ESM::VER_100)) // TES4 { land.mDefaultDiffuseMap = VFS::Path::NormalizedView("textures/landscape/terrainhddirt01.dds"); land.mDefaultNormalMap = VFS::Path::NormalizedView("textures/landscape/terrainhddirt01_n.dds"); } else if (reader.hasFormVersion() && reader.formVersion() >= 16 && (esmVer == ESM::VER_094 || esmVer == ESM::VER_170 || esmVer == ESM::VER_171)) // TES5 { land.mDefaultDiffuseMap = VFS::Path::NormalizedView("textures/landscape/dirt02.dds"); land.mDefaultNormalMap = VFS::Path::NormalizedView("textures/landscape/dirt02_n.dds"); } else if (esmVer == ESM::VER_095 || esmVer == ESM::VER_100) // FO4 { land.mDefaultDiffuseMap = VFS::Path::NormalizedView("textures/landscape/ground/commonwealthdefault01_d.dds"); land.mDefaultNormalMap = VFS::Path::NormalizedView("textures/landscape/ground/commonwealthdefault01_n.dds"); } else if (esmVer == ESM::VER_094 || esmVer == ESM::VER_132 || esmVer == ESM::VER_133 || esmVer == ESM::VER_134) { // FO3, FONV land.mDefaultDiffuseMap = VFS::Path::NormalizedView("textures/landscape/dirtwasteland01.dds"); land.mDefaultNormalMap = VFS::Path::NormalizedView("textures/landscape/dirtwasteland01_n.dds"); } else { // Nothing especially bad happens if default texture is not set (except of the missing texture of course), // but we throw an error because this case is unexpected and detection logic needs to be updated. throw std::runtime_error("ESM4::Land unknown ESM version"); } }}
// overlap north//// 32// 31// 30// overlap .// west .// .// 2// 1// 0// 0 1 2 ... 30 31 32//// overlap south//void ESM4::Land::load(ESM4::Reader& reader){ mId = reader.getFormIdFromHeader(); mFlags = reader.hdr().record.flags;
mDataTypes = 0; mCell = reader.currCell(); TxtLayer layer; std::int8_t currentAddQuad = -1; // for VTXT following ATXT assignDefaultTextures(*this, reader);
layer.texture.formId = 0; for (int i = 0; i < 4; ++i) mTextures[i].base.formId = 0;
while (reader.getSubRecordHeader()) { const ESM4::SubRecordHeader& subHdr = reader.subRecordHeader(); switch (subHdr.typeId) { case ESM::fourCC("DATA"): { reader.get(mLandFlags); break; } case ESM::fourCC("VNML"): // vertex normals, 33x33x(1+1+1) = 3267 { reader.get(mVertNorm); mDataTypes |= LAND_VNML; break; } case ESM::fourCC("VHGT"): // vertex height gradient, 4+33x33+3 = 4+1089+3 = 1096 { reader.get(mHeightMap); mDataTypes |= LAND_VHGT; break; } case ESM::fourCC("VCLR"): // vertex colours, 24bit RGB, 33x33x(1+1+1) = 3267 { reader.get(mVertColr); mDataTypes |= LAND_VCLR; break; } case ESM::fourCC("BTXT"): { BTXT base; if (reader.getExact(base)) { if (base.quadrant >= 4) throw std::runtime_error("base texture quadrant index error");
if (base.formId != 0) reader.adjustFormId(base.formId); mTextures[base.quadrant].base = base; } break; } case ESM::fourCC("ATXT"): { if (currentAddQuad != -1) { // NOTE: sometimes there are no VTXT following an ATXT layer.data.resize(1); // just one spot layer.data.back().position = 0; // this corner layer.data.back().opacity = 0.f; // transparent
if (layer.texture.layerIndex != mTextures[currentAddQuad].layers.size()) throw std::runtime_error("ESM4::LAND additional texture skipping layer");
mTextures[currentAddQuad].layers.push_back(layer); }
reader.get(layer.texture); if (layer.texture.formId != 0) reader.adjustFormId(layer.texture.formId); if (layer.texture.quadrant >= 4) throw std::runtime_error("ESM4::LAND additional texture quadrant index error");
currentAddQuad = layer.texture.quadrant; break; } case ESM::fourCC("VTXT"): { if (currentAddQuad == -1) throw std::runtime_error("VTXT without ATXT found");
const std::uint16_t count = reader.subRecordHeader().dataSize / sizeof(ESM4::Land::VTXT); if ((reader.subRecordHeader().dataSize % sizeof(ESM4::Land::VTXT)) != 0) throw std::runtime_error("ESM4::LAND VTXT data size error");
if (count) { layer.data.resize(count); for (ESM4::Land::VTXT& vtxt : layer.data) reader.get(vtxt); }
if (layer.texture.layerIndex != mTextures[currentAddQuad].layers.size()) throw std::runtime_error("ESM4::LAND additional texture skipping layer");
mTextures[currentAddQuad].layers.push_back(layer);
currentAddQuad = -1; layer.data.clear(); break; } case ESM::fourCC("VTEX"): // only in Oblivion? { const std::uint16_t count = reader.subRecordHeader().dataSize / sizeof(ESM::FormId32); if ((reader.subRecordHeader().dataSize % sizeof(ESM::FormId32)) != 0) throw std::runtime_error("ESM4::LAND VTEX data size error");
if (count) { mIds.resize(count); for (ESM::FormId& id : mIds) reader.getFormId(id); } break; } case ESM::fourCC("MPCD"): // FO4 reader.skipSubRecordData(); break; default: throw std::runtime_error("ESM4::LAND - Unknown subrecord " + ESM::printName(subHdr.typeId)); } }
if (currentAddQuad != -1) { // not sure if it happens here as well, if so just ignore Log(Debug::Verbose) << "ESM4::Land VTXT empty layer " << layer.texture.layerIndex << " quad " << static_cast<unsigned>(layer.texture.quadrant); }}