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mo
bc0a786444
Model loading used binormals as tangents and derived handedness from the binormal's X component. Use the calculated tangent and basis orientation
66 lines
3.3 KiB
C++
66 lines
3.3 KiB
C++
#include "Game/IW4/CommonIW4.h"
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#include "Gdt/GdtLookup.h"
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#include "IObjLoader.h"
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#include "SearchPath/MockSearchPath.h"
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#include "XModel/Gltf/GltfBinOutput.h"
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#include "XModel/Gltf/GltfWriter.h"
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#include "XModel/XModelCommon.h"
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#include <catch2/catch_test_macros.hpp>
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#include <catch2/generators/catch_generators.hpp>
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#include <catch2/matchers/catch_matchers_floating_point.hpp>
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#include <nlohmann/json.hpp>
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#include <sstream>
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namespace
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{
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TEST_CASE("IW4 model loading preserves tangent axes and mirrored UV handedness", "[iw4][system][xmodel]")
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{
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const auto mirrored = GENERATE(false, true);
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XModelCommon common;
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common.m_name = "triangle";
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common.m_vertices = {
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{.coordinates = {0, 0, 0}, .normal = {0, 0, 1}, .color = {1, 1, 1, 1}, .uv = {0, 0} },
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{.coordinates = {1, 0, 0}, .normal = {0, 0, 1}, .color = {1, 1, 1, 1}, .uv = {1, 0} },
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{.coordinates = {0, 1, 0}, .normal = {0, 0, 1}, .color = {1, 1, 1, 1}, .uv = {0, mirrored ? -1.0f : 1.0f}},
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};
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XModelMaterial material{};
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material.ApplyDefaults();
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material.name = "material";
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common.m_materials.push_back(material);
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common.m_objects.push_back({.name = "triangle", .materialIndex = 0, .m_faces = {XModelFace{{0, 1, 2}}}});
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std::ostringstream modelData(std::ios::binary);
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const gltf::BinOutput modelOutput(modelData);
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gltf::Writer::CreateWriter(&modelOutput, "iw4", "test")->Write(common);
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const nlohmann::json metadata{
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{"_game", "iw4" },
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{"_type", "xmodel" },
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{"_version", 2 },
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{"flags", 0 },
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{"lods", {{{"file", "triangle.glb"}, {"distance", 100}}}},
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};
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MockSearchPath searchPath;
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searchPath.AddFileData("triangle.glb", modelData.str());
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searchPath.AddFileData("xmodel/triangle.json", metadata.dump());
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searchPath.AddFileData("partclassification.csv", "");
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Zone zone("tangents", 0, GameId::IW4, GamePlatform::PC);
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AssetCreatorCollection creators(zone);
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GdtLookup gdt;
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IObjLoader::GetObjLoaderForGame(GameId::IW4)->ConfigureCreatorCollection(creators, zone, searchPath, gdt);
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IgnoredAssetLookup ignored;
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ignored.m_ignored_asset_lookup.emplace("material", IW4::ASSET_TYPE_MATERIAL);
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AssetCreationContext context(zone, &creators, &ignored);
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REQUIRE(creators.CreateAsset(IW4::ASSET_TYPE_XMODEL, "triangle", context).HasBeenSuccessful());
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for (auto i = 0u; i < 3u; ++i)
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{
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float tangent[3];
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const auto& vertex = zone.m_pools.GetAsset<IW4::AssetXModel>("triangle")->Asset()->lodInfo[0].modelSurfs->surfs[0].verts0[i];
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IW4::Common::Vec3UnpackUnitVec(vertex.tangent, tangent);
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CHECK_THAT(tangent[0], Catch::Matchers::WithinAbs(1.0f, 0.01f));
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CHECK_THAT(tangent[1], Catch::Matchers::WithinAbs(0.0f, 0.01f));
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CHECK_THAT(tangent[2], Catch::Matchers::WithinAbs(0.0f, 0.01f));
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CHECK(vertex.binormalSign == (mirrored ? -1.0f : 1.0f));
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}
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}
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} // namespace
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