mirror of
https://github.com/Laupetin/OpenAssetTools.git
synced 2025-04-20 16:15:43 +00:00
698 lines
27 KiB
C++
698 lines
27 KiB
C++
#include "GltfLoader.h"
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#include "Internal/GltfAccessor.h"
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#include "Internal/GltfBuffer.h"
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#include "Internal/GltfBufferView.h"
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#pragma warning(push, 0)
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#include <Eigen>
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#pragma warning(pop)
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#include <deque>
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#include <exception>
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#include <format>
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#include <iostream>
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#include <limits>
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#include <nlohmann/json.hpp>
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#include <string>
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using namespace gltf;
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namespace
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{
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struct AccessorsForVertex
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{
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unsigned positionAccessor;
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std::optional<unsigned> normalAccessor;
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std::optional<unsigned> colorAccessor;
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std::optional<unsigned> uvAccessor;
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std::optional<unsigned> jointsAccessor;
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std::optional<unsigned> weightsAccessor;
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friend bool operator==(const AccessorsForVertex& lhs, const AccessorsForVertex& rhs)
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{
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return lhs.positionAccessor == rhs.positionAccessor && lhs.normalAccessor == rhs.normalAccessor && lhs.colorAccessor == rhs.colorAccessor
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&& lhs.uvAccessor == rhs.uvAccessor && lhs.jointsAccessor == rhs.jointsAccessor && lhs.weightsAccessor == rhs.weightsAccessor;
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}
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friend bool operator!=(const AccessorsForVertex& lhs, const AccessorsForVertex& rhs)
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{
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return !(lhs == rhs);
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}
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};
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} // namespace
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template<> struct std::hash<AccessorsForVertex>
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{
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std::size_t operator()(const AccessorsForVertex& v) const noexcept
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{
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std::size_t seed = 0x7E42C0E6;
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seed ^= (seed << 6) + (seed >> 2) + 0x47B15429 + static_cast<std::size_t>(v.positionAccessor);
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seed ^= (seed << 6) + (seed >> 2) + 0x66847B5C + std::hash<std::optional<unsigned>>()(v.normalAccessor);
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seed ^= (seed << 6) + (seed >> 2) + 0x77399D60 + std::hash<std::optional<unsigned>>()(v.colorAccessor);
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seed ^= (seed << 6) + (seed >> 2) + 0x477AF9AB + std::hash<std::optional<unsigned>>()(v.uvAccessor);
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seed ^= (seed << 6) + (seed >> 2) + 0x4421B4D9 + std::hash<std::optional<unsigned>>()(v.jointsAccessor);
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seed ^= (seed << 6) + (seed >> 2) + 0x13C2EBA1 + std::hash<std::optional<unsigned>>()(v.weightsAccessor);
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return seed;
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}
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};
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namespace
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{
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class GltfLoadException final : std::exception
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{
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public:
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explicit GltfLoadException(std::string message)
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: m_message(std::move(message))
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{
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}
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[[nodiscard]] const std::string& Str() const
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{
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return m_message;
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}
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[[nodiscard]] const char* what() const override
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{
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return m_message.c_str();
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}
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private:
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std::string m_message;
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};
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struct ObjectToLoad
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{
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unsigned meshIndex;
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std::optional<unsigned> skinIndex;
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ObjectToLoad(const unsigned meshIndex, const std::optional<unsigned> skinIndex)
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: meshIndex(meshIndex),
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skinIndex(skinIndex)
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{
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}
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};
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class GltfLoaderImpl final : public Loader
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{
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public:
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explicit GltfLoaderImpl(const Input* input)
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: m_input(input)
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{
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}
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static std::vector<unsigned> GetRootNodes(const JsonRoot& jRoot)
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{
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if (!jRoot.nodes || jRoot.nodes->empty())
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return {};
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const auto nodeCount = jRoot.nodes->size();
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std::vector<unsigned> rootNodes;
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std::vector<bool> isChild(nodeCount);
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for (const auto& node : jRoot.nodes.value())
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{
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if (!node.children)
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continue;
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for (const auto childIndex : node.children.value())
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{
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if (childIndex >= nodeCount)
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throw GltfLoadException("Illegal child index");
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if (isChild[childIndex])
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throw GltfLoadException("Node hierarchy is not a set of disjoint strict trees");
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isChild[childIndex] = true;
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}
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}
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for (auto nodeIndex = 0u; nodeIndex < nodeCount; nodeIndex++)
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{
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if (!isChild[nodeIndex])
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rootNodes.emplace_back(nodeIndex);
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}
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return rootNodes;
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}
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void TraverseNodes(const JsonRoot& jRoot)
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{
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// Make sure there are any nodes to traverse
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if (!jRoot.nodes || jRoot.nodes->empty())
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return;
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std::deque<unsigned> nodeQueue;
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std::vector<unsigned> rootNodes = GetRootNodes(jRoot);
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for (const auto rootNode : rootNodes)
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nodeQueue.emplace_back(rootNode);
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while (!nodeQueue.empty())
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{
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const auto& node = jRoot.nodes.value()[nodeQueue.front()];
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nodeQueue.pop_front();
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if (node.children)
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{
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for (const auto childIndex : *node.children)
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nodeQueue.emplace_back(childIndex);
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}
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if (node.mesh)
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m_load_objects.emplace_back(*node.mesh, node.skin);
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}
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}
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std::optional<Accessor*> GetAccessorForIndex(const char* attributeName,
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const std::optional<unsigned> index,
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std::initializer_list<JsonAccessorType> allowedAccessorTypes,
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std::initializer_list<JsonAccessorComponentType> allowedAccessorComponentTypes) const
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{
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if (!index)
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return std::nullopt;
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if (*index > m_accessors.size())
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throw GltfLoadException(std::format("Index for {} accessor out of bounds", attributeName));
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auto* accessor = m_accessors[*index].get();
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const auto maybeType = accessor->GetType();
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if (maybeType)
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{
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if (std::ranges::find(allowedAccessorTypes, *maybeType) == allowedAccessorTypes.end())
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throw GltfLoadException(std::format("Accessor for {} has unsupported type {}", attributeName, static_cast<unsigned>(*maybeType)));
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}
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const auto maybeComponentType = accessor->GetComponentType();
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if (maybeComponentType)
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{
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if (std::ranges::find(allowedAccessorComponentTypes, *maybeComponentType) == allowedAccessorComponentTypes.end())
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throw GltfLoadException(
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std::format("Accessor for {} has unsupported component type {}", attributeName, static_cast<unsigned>(*maybeComponentType)));
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}
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return accessor;
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}
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static void VerifyAccessorVertexCount(const char* accessorType, const Accessor* accessor, const size_t vertexCount)
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{
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if (accessor->GetCount() != vertexCount)
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throw GltfLoadException(std::format("Element count of {} accessor does not match expected vertex count of {}", accessorType, vertexCount));
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}
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unsigned CreateVertices(XModelCommon& common, const AccessorsForVertex& accessorsForVertex)
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{
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// clang-format off
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auto* positionAccessor = GetAccessorForIndex(
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"POSITION",
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accessorsForVertex.positionAccessor,
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{JsonAccessorType::VEC3},
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{JsonAccessorComponentType::FLOAT}
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).value_or(nullptr);
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// clang-format on
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const auto vertexCount = positionAccessor->GetCount();
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NullAccessor nullAccessor(vertexCount);
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// clang-format off
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auto* normalAccessor = GetAccessorForIndex(
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"NORMAL",
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accessorsForVertex.normalAccessor,
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{JsonAccessorType::VEC3},
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{JsonAccessorComponentType::FLOAT}
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).value_or(&nullAccessor);
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VerifyAccessorVertexCount("NORMAL", normalAccessor, vertexCount);
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auto* uvAccessor = GetAccessorForIndex(
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"TEXCOORD_0",
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accessorsForVertex.uvAccessor,
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{JsonAccessorType::VEC2},
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{JsonAccessorComponentType::FLOAT, JsonAccessorComponentType::UNSIGNED_BYTE, JsonAccessorComponentType::UNSIGNED_SHORT}
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).value_or(&nullAccessor);
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VerifyAccessorVertexCount("TEXCOORD_0", uvAccessor, vertexCount);
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auto* colorAccessor = GetAccessorForIndex(
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"COLOR_0",
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accessorsForVertex.colorAccessor,
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{JsonAccessorType::VEC3, JsonAccessorType::VEC4},
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{JsonAccessorComponentType::FLOAT, JsonAccessorComponentType::UNSIGNED_BYTE, JsonAccessorComponentType::UNSIGNED_SHORT}
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).value_or(&nullAccessor);
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VerifyAccessorVertexCount("COLOR_0", colorAccessor, vertexCount);
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auto* jointsAccessor = GetAccessorForIndex(
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"JOINTS_0",
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accessorsForVertex.jointsAccessor,
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{JsonAccessorType::VEC4},
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{JsonAccessorComponentType::UNSIGNED_BYTE, JsonAccessorComponentType::UNSIGNED_SHORT}
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).value_or(&nullAccessor);
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VerifyAccessorVertexCount("JOINTS_0", jointsAccessor, vertexCount);
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auto* weightsAccessor = GetAccessorForIndex(
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"WEIGHTS_0",
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accessorsForVertex.weightsAccessor,
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{JsonAccessorType::VEC4},
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{JsonAccessorComponentType::FLOAT, JsonAccessorComponentType::UNSIGNED_BYTE, JsonAccessorComponentType::UNSIGNED_SHORT}
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).value_or(&nullAccessor);
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VerifyAccessorVertexCount("WEIGHTS_0", weightsAccessor, vertexCount);
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// clang-format on
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const auto vertexOffset = common.m_vertices.size();
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common.m_vertices.reserve(vertexOffset + vertexCount);
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common.m_vertex_bone_weights.reserve(vertexOffset + vertexCount);
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for (auto vertexIndex = 0u; vertexIndex < vertexCount; vertexIndex++)
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{
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XModelVertex vertex;
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unsigned joints[4];
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float weights[4];
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float coordinates[3];
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float normal[3];
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if (!positionAccessor->GetFloatVec3(vertexIndex, coordinates) || !normalAccessor->GetFloatVec3(vertexIndex, normal)
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|| !colorAccessor->GetFloatVec4(vertexIndex, vertex.color) || !colorAccessor->GetFloatVec2(vertexIndex, vertex.uv)
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|| !jointsAccessor->GetUnsignedVec4(vertexIndex, joints) || !weightsAccessor->GetFloatVec4(vertexIndex, weights))
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{
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return false;
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}
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vertex.coordinates[0] = coordinates[0];
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vertex.coordinates[1] = -coordinates[2];
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vertex.coordinates[2] = coordinates[1];
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vertex.normal[0] = normal[0];
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vertex.normal[1] = -normal[2];
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vertex.normal[2] = normal[1];
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common.m_vertices.emplace_back(vertex);
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XModelVertexBoneWeights vertexWeights{common.m_bone_weight_data.weights.size(), 0u};
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for (auto i = 0u; i < std::extent_v<decltype(joints)>; i++)
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{
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if (std::abs(weights[i]) < std::numeric_limits<float>::epsilon())
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continue;
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common.m_bone_weight_data.weights.emplace_back(joints[i], weights[i]);
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vertexWeights.weightCount++;
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}
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common.m_vertex_bone_weights.emplace_back(vertexWeights);
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}
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m_vertex_offset_for_accessors.emplace(accessorsForVertex, vertexOffset);
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return vertexOffset;
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}
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bool ConvertObject(const JsonRoot& jRoot, const JsonMeshPrimitives& primitives, XModelCommon& common, XModelObject& object)
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{
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if (!primitives.indices)
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throw GltfLoadException("Requires primitives indices");
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if (!primitives.material)
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throw GltfLoadException("Requires primitives material");
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if (primitives.mode.value_or(JsonMeshPrimitivesMode::TRIANGLES) != JsonMeshPrimitivesMode::TRIANGLES)
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throw GltfLoadException("Only triangles are supported");
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if (!primitives.attributes.POSITION)
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throw GltfLoadException("Requires primitives attribute POSITION");
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AccessorsForVertex accessorsForVertex{
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*primitives.attributes.POSITION,
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primitives.attributes.NORMAL,
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primitives.attributes.COLOR_0,
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primitives.attributes.TEXCOORD_0,
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primitives.attributes.JOINTS_0,
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primitives.attributes.WEIGHTS_0,
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};
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const auto existingVertices = m_vertex_offset_for_accessors.find(accessorsForVertex);
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const auto vertexOffset =
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existingVertices == m_vertex_offset_for_accessors.end() ? CreateVertices(common, accessorsForVertex) : existingVertices->second;
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// clang-format off
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auto* indexAccessor = GetAccessorForIndex(
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"INDICES",
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primitives.indices,
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{JsonAccessorType::SCALAR},
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{JsonAccessorComponentType::UNSIGNED_BYTE, JsonAccessorComponentType::UNSIGNED_SHORT, JsonAccessorComponentType::UNSIGNED_INT}
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).value_or(nullptr);
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// clang-format on
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const auto indexCount = indexAccessor->GetCount();
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if (indexCount % 3 != 0)
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throw GltfLoadException("Index count must be dividable by 3 for triangles");
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const auto faceCount = indexCount / 3u;
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object.m_faces.reserve(faceCount);
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for (auto faceIndex = 0u; faceIndex < faceCount; faceIndex++)
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{
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unsigned indices[3];
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if (!indexAccessor->GetUnsigned(faceIndex * 3u + 0u, indices[0]) || !indexAccessor->GetUnsigned(faceIndex * 3u + 1u, indices[1])
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|| !indexAccessor->GetUnsigned(faceIndex * 3u + 2u, indices[2]))
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{
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return false;
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}
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object.m_faces.emplace_back(XModelFace{
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vertexOffset + indices[0],
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vertexOffset + indices[1],
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vertexOffset + indices[2],
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});
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}
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if (!jRoot.materials || *primitives.material >= jRoot.materials->size())
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throw GltfLoadException("Invalid material index");
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object.materialIndex = static_cast<int>(*primitives.material);
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return true;
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}
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static std::optional<unsigned> GetRootNodeForSkin(const JsonRoot& jRoot, const JsonSkin& skin)
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{
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if (!jRoot.nodes || skin.joints.empty())
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return std::nullopt;
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const auto jointCount = skin.joints.size();
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auto rootCount = jointCount;
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std::vector<bool> isRoot(jointCount, true);
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for (const auto joint : skin.joints)
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{
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if (jRoot.nodes->size() <= joint)
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throw GltfLoadException("Invalid joint index");
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const auto& node = jRoot.nodes.value()[joint];
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if (node.children)
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{
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for (const auto child : *node.children)
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{
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const auto foundChildJoint = std::ranges::find(skin.joints, child);
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if (foundChildJoint != skin.joints.end())
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{
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const auto foundChildJointIndex = std::distance(skin.joints.begin(), foundChildJoint);
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if (isRoot[foundChildJointIndex])
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{
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isRoot[foundChildJointIndex] = false;
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rootCount--;
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}
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}
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}
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}
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}
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if (rootCount != 1)
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throw GltfLoadException("Skins must have exactly one common root node");
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for (auto index = 0u; index < jointCount; index++)
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{
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if (isRoot[index])
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return skin.joints[index];
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}
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return std::nullopt;
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}
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static bool ConvertJoint(const JsonRoot& jRoot,
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XModelCommon& common,
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const unsigned nodeIndex,
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const std::optional<unsigned> parentIndex,
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const float (&parentOffset)[3],
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const XModelQuaternion& parentRotation,
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const float (&parentScale)[3])
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{
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if (!jRoot.nodes || nodeIndex >= jRoot.nodes->size())
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return false;
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const auto& node = jRoot.nodes.value()[nodeIndex];
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XModelBone bone;
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bone.name = node.name.value_or(std::string());
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bone.parentIndex = parentIndex;
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if (node.scale)
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{
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bone.scale[0] = parentScale[0] * (*node.scale)[0];
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bone.scale[1] = parentScale[1] * (*node.scale)[1];
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bone.scale[2] = parentScale[2] * (*node.scale)[2];
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}
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else
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{
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bone.scale[0] = parentScale[0];
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bone.scale[1] = parentScale[1];
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bone.scale[2] = parentScale[2];
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}
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if (node.translation)
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{
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bone.localOffset[0] = (*node.translation)[0];
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bone.localOffset[1] = -(*node.translation)[2];
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bone.localOffset[2] = (*node.translation)[1];
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}
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else
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{
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bone.localOffset[0] = 0.0f;
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bone.localOffset[1] = 0.0f;
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bone.localOffset[2] = 0.0f;
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}
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bone.globalOffset[0] = bone.localOffset[0] + parentOffset[0];
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bone.globalOffset[1] = bone.localOffset[1] + parentOffset[1];
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bone.globalOffset[2] = bone.localOffset[2] + parentOffset[2];
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if (node.rotation)
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{
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bone.localRotation.x = (*node.rotation)[0];
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bone.localRotation.y = (*node.rotation)[2];
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bone.localRotation.z = -(*node.rotation)[1];
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bone.localRotation.w = (*node.rotation)[3];
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}
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else
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{
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bone.localRotation.x = 0.0f;
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bone.localRotation.y = 0.0f;
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bone.localRotation.z = 0.0f;
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bone.localRotation.w = 1.0f;
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}
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const auto localRotationEigen = Eigen::Quaternionf(bone.localRotation.w, bone.localRotation.x, bone.localRotation.y, bone.localRotation.z);
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const auto parentRotationEigen = Eigen::Quaternionf(parentRotation.w, parentRotation.x, parentRotation.y, parentRotation.z);
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const auto globalRotationEigen = localRotationEigen * parentRotationEigen;
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bone.globalRotation.x = globalRotationEigen.x();
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bone.globalRotation.y = globalRotationEigen.y();
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bone.globalRotation.z = globalRotationEigen.z();
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bone.globalRotation.w = globalRotationEigen.w();
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const auto commonIndex = common.m_bones.size();
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common.m_bones.emplace_back(std::move(bone));
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if (node.children)
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{
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for (const auto childIndex : *node.children)
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{
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if (!ConvertJoint(jRoot, common, childIndex, commonIndex, bone.globalOffset, bone.globalRotation, bone.scale))
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return false;
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}
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}
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return true;
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}
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static bool ConvertSkin(const JsonRoot& jRoot, const JsonSkin& skin, XModelCommon& common)
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{
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if (skin.joints.empty())
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return true;
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if (!jRoot.nodes)
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return false;
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if (!common.m_bones.empty())
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throw GltfLoadException("Only scenes with at most one skin are supported");
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const auto rootNode = GetRootNodeForSkin(jRoot, skin).value_or(skin.joints[0]);
|
|
|
|
constexpr float defaultTranslation[3]{0.0f, 0.0f, 0.0f};
|
|
constexpr XModelQuaternion defaultRotation{0.0f, 0.0f, 0.0f, 1.0f};
|
|
constexpr float defaultScale[3]{1.0f, 1.0f, 1.0f};
|
|
|
|
return ConvertJoint(jRoot, common, rootNode, std::nullopt, defaultTranslation, defaultRotation, defaultScale);
|
|
}
|
|
|
|
void ConvertObjects(const JsonRoot& jRoot, XModelCommon& common)
|
|
{
|
|
if (!jRoot.meshes)
|
|
return;
|
|
|
|
for (const auto& loadObject : m_load_objects)
|
|
{
|
|
if (loadObject.skinIndex && jRoot.skins)
|
|
{
|
|
const auto& skin = jRoot.skins.value()[*loadObject.skinIndex];
|
|
if (!ConvertSkin(jRoot, skin, common))
|
|
return;
|
|
}
|
|
|
|
const auto& mesh = jRoot.meshes.value()[loadObject.meshIndex];
|
|
|
|
common.m_objects.reserve(common.m_objects.size() + mesh.primitives.size());
|
|
for (const auto& primitives : mesh.primitives)
|
|
{
|
|
XModelObject object;
|
|
if (!ConvertObject(jRoot, primitives, common, object))
|
|
return;
|
|
|
|
common.m_objects.emplace_back(std::move(object));
|
|
}
|
|
}
|
|
}
|
|
|
|
static void ConvertMaterials(const JsonRoot& jRoot, XModelCommon& common)
|
|
{
|
|
if (!jRoot.materials)
|
|
return;
|
|
|
|
common.m_materials.reserve(jRoot.materials->size());
|
|
for (const auto& jMaterial : *jRoot.materials)
|
|
{
|
|
XModelMaterial material;
|
|
material.ApplyDefaults();
|
|
|
|
if (jMaterial.name)
|
|
material.name = *jMaterial.name;
|
|
else
|
|
throw GltfLoadException("Materials must have a name");
|
|
|
|
common.m_materials.emplace_back(std::move(material));
|
|
}
|
|
}
|
|
|
|
void CreateBuffers(const JsonRoot& jRoot)
|
|
{
|
|
if (!jRoot.buffers)
|
|
return;
|
|
|
|
m_buffers.reserve(jRoot.buffers->size());
|
|
for (const auto& jBuffer : *jRoot.buffers)
|
|
{
|
|
if (!jBuffer.uri)
|
|
{
|
|
const void* embeddedBufferPtr = nullptr;
|
|
size_t embeddedBufferSize = 0u;
|
|
if (!m_input->GetEmbeddedBuffer(embeddedBufferPtr, embeddedBufferSize) || embeddedBufferSize == 0u)
|
|
throw GltfLoadException("Buffer tried to access embedded data when there is none");
|
|
|
|
m_buffers.emplace_back(std::make_unique<EmbeddedBuffer>(embeddedBufferPtr, embeddedBufferSize));
|
|
}
|
|
else if (DataUriBuffer::IsDataUri(*jBuffer.uri))
|
|
{
|
|
auto dataUriBuffer = std::make_unique<DataUriBuffer>();
|
|
if (!dataUriBuffer->ReadDataFromUri(*jBuffer.uri))
|
|
throw GltfLoadException("Buffer has invalid data uri");
|
|
|
|
m_buffers.emplace_back(std::move(dataUriBuffer));
|
|
}
|
|
else
|
|
{
|
|
throw GltfLoadException("File buffers are not supported");
|
|
}
|
|
}
|
|
}
|
|
|
|
void CreateBufferViews(const JsonRoot& jRoot)
|
|
{
|
|
if (!jRoot.bufferViews)
|
|
return;
|
|
|
|
m_buffer_views.reserve(jRoot.bufferViews->size());
|
|
for (const auto& jBufferView : *jRoot.bufferViews)
|
|
{
|
|
if (jBufferView.buffer >= m_buffers.size())
|
|
throw GltfLoadException("Buffer view references invalid buffer");
|
|
|
|
const auto* buffer = m_buffers[jBufferView.buffer].get();
|
|
const auto offset = jBufferView.byteOffset.value_or(0u);
|
|
const auto length = jBufferView.byteLength;
|
|
const auto stride = jBufferView.byteStride.value_or(0u);
|
|
|
|
if (offset + length > buffer->GetSize())
|
|
throw GltfLoadException("Buffer view is defined larger as underlying buffer");
|
|
|
|
m_buffer_views.emplace_back(std::make_unique<BufferView>(buffer, offset, length, stride));
|
|
}
|
|
}
|
|
|
|
void CreateAccessors(const JsonRoot& jRoot)
|
|
{
|
|
if (!jRoot.accessors)
|
|
return;
|
|
|
|
m_accessors.reserve(jRoot.accessors->size());
|
|
for (const auto& jAccessor : *jRoot.accessors)
|
|
{
|
|
if (!jAccessor.bufferView)
|
|
{
|
|
m_accessors.emplace_back(std::make_unique<NullAccessor>(jAccessor.count));
|
|
continue;
|
|
}
|
|
|
|
if (*jAccessor.bufferView >= m_buffer_views.size())
|
|
throw GltfLoadException("Accessor references invalid buffer view");
|
|
|
|
const auto* bufferView = m_buffer_views[*jAccessor.bufferView].get();
|
|
if (jAccessor.componentType == JsonAccessorComponentType::FLOAT)
|
|
m_accessors.emplace_back(std::make_unique<FloatAccessor>(bufferView, jAccessor.type, jAccessor.count));
|
|
else if (jAccessor.componentType == JsonAccessorComponentType::UNSIGNED_BYTE)
|
|
m_accessors.emplace_back(std::make_unique<UnsignedByteAccessor>(bufferView, jAccessor.type, jAccessor.count));
|
|
else if (jAccessor.componentType == JsonAccessorComponentType::UNSIGNED_SHORT)
|
|
m_accessors.emplace_back(std::make_unique<UnsignedShortAccessor>(bufferView, jAccessor.type, jAccessor.count));
|
|
else
|
|
throw GltfLoadException(std::format("Accessor has unsupported component type {}", static_cast<unsigned>(jAccessor.componentType)));
|
|
}
|
|
}
|
|
|
|
std::unique_ptr<XModelCommon> Load() override
|
|
{
|
|
JsonRoot jRoot;
|
|
try
|
|
{
|
|
jRoot = m_input->GetJson().get<JsonRoot>();
|
|
}
|
|
catch (const nlohmann::json::exception& e)
|
|
{
|
|
std::cerr << std::format("Failed to parse GLTF JSON: {}\n", e.what());
|
|
return nullptr;
|
|
}
|
|
|
|
try
|
|
{
|
|
CreateBuffers(jRoot);
|
|
CreateBufferViews(jRoot);
|
|
CreateAccessors(jRoot);
|
|
|
|
TraverseNodes(jRoot);
|
|
|
|
auto common = std::make_unique<XModelCommon>();
|
|
ConvertObjects(jRoot, *common);
|
|
ConvertMaterials(jRoot, *common);
|
|
|
|
return common;
|
|
}
|
|
catch (const GltfLoadException& e)
|
|
{
|
|
std::cerr << std::format("Failed to load GLTF: {}\n", e.Str());
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
private:
|
|
const Input* m_input;
|
|
std::vector<ObjectToLoad> m_load_objects;
|
|
std::unordered_map<AccessorsForVertex, unsigned> m_vertex_offset_for_accessors;
|
|
std::vector<std::unique_ptr<Accessor>> m_accessors;
|
|
std::vector<std::unique_ptr<BufferView>> m_buffer_views;
|
|
std::vector<std::unique_ptr<Buffer>> m_buffers;
|
|
};
|
|
} // namespace
|
|
|
|
std::unique_ptr<Loader> Loader::CreateLoader(const Input* input)
|
|
{
|
|
return std::make_unique<GltfLoaderImpl>(input);
|
|
}
|