From 7a0930a208cbcaa350ec60c4b48824ec95f0aed5 Mon Sep 17 00:00:00 2001
From: Jan <jan@laupetin.net>
Date: Sun, 31 Mar 2024 13:07:06 +0200
Subject: [PATCH] chore: add json types for gltf

---
 src/ObjCommon/XModel/Gltf/JsonGltf.h | 256 +++++++++++++++++++++++++++
 1 file changed, 256 insertions(+)
 create mode 100644 src/ObjCommon/XModel/Gltf/JsonGltf.h

diff --git a/src/ObjCommon/XModel/Gltf/JsonGltf.h b/src/ObjCommon/XModel/Gltf/JsonGltf.h
new file mode 100644
index 00000000..5922df88
--- /dev/null
+++ b/src/ObjCommon/XModel/Gltf/JsonGltf.h
@@ -0,0 +1,256 @@
+#pragma once
+
+#include "Json/JsonExtension.h"
+#include <nlohmann/json.hpp>
+#include <optional>
+#include <string>
+#include <vector>
+
+namespace gltf
+{
+    class JsonAsset
+    {
+    public:
+        std::string version;
+        std::optional<std::string> generator;
+    };
+
+    NLOHMANN_DEFINE_TYPE_EXTENSION(JsonAsset, version, generator);
+
+    class JsonNode
+    {
+    public:
+        std::string name;
+        std::vector<float> translation;
+        std::vector<float> rotation;
+        std::vector<float> scale;
+        std::vector<unsigned> children;
+    };
+
+    NLOHMANN_DEFINE_TYPE_EXTENSION(JsonNode, name, translation, rotation, scale, children);
+
+    class JsonBuffer
+    {
+    public:
+        unsigned byteLength;
+        std::optional<std::string> uri;
+    };
+
+    NLOHMANN_DEFINE_TYPE_EXTENSION(JsonBuffer, byteLength, uri);
+
+    enum class JsonAccessorComponentType
+    {
+        SIGNED_BYTE = 5120,
+        UNSIGNED_BYTE = 5121,
+        SIGNED_SHORT = 5122,
+        UNSIGNED_SHORT = 5123,
+        UNSIGNED_INT = 5125,
+        FLOAT = 5126
+    };
+
+    NLOHMANN_JSON_SERIALIZE_ENUM(JsonAccessorComponentType,
+                                 {
+                                     {JsonAccessorComponentType::SIGNED_BYTE,    static_cast<unsigned>(JsonAccessorComponentType::SIGNED_BYTE)   },
+                                     {JsonAccessorComponentType::UNSIGNED_BYTE,  static_cast<unsigned>(JsonAccessorComponentType::UNSIGNED_BYTE) },
+                                     {JsonAccessorComponentType::SIGNED_SHORT,   static_cast<unsigned>(JsonAccessorComponentType::SIGNED_SHORT)  },
+                                     {JsonAccessorComponentType::UNSIGNED_SHORT, static_cast<unsigned>(JsonAccessorComponentType::UNSIGNED_SHORT)},
+                                     {JsonAccessorComponentType::UNSIGNED_INT,   static_cast<unsigned>(JsonAccessorComponentType::UNSIGNED_INT)  },
+                                     {JsonAccessorComponentType::FLOAT,          static_cast<unsigned>(JsonAccessorComponentType::FLOAT)         },
+    });
+
+    enum class JsonAccessorType
+    {
+        SCALAR,
+        VEC2,
+        VEC3,
+        VEC4,
+        MAT2,
+        MAT3,
+        MAT4
+    };
+
+    NLOHMANN_JSON_SERIALIZE_ENUM(JsonAccessorType,
+                                 {
+                                     {JsonAccessorType::SCALAR, "SCALAR"},
+                                     {JsonAccessorType::VEC2,   "VEC2"  },
+                                     {JsonAccessorType::VEC3,   "VEC3"  },
+                                     {JsonAccessorType::VEC4,   "VEC4"  },
+                                     {JsonAccessorType::MAT2,   "MAT2"  },
+                                     {JsonAccessorType::MAT3,   "MAT3"  },
+                                     {JsonAccessorType::MAT4,   "MAT4"  },
+    });
+
+    class JsonAccessor
+    {
+    public:
+        std::optional<unsigned> bufferView;
+        std::optional<unsigned> byteOffset;
+        JsonAccessorComponentType componentType;
+        // std::optional<boolean> normalized
+        unsigned count;
+        JsonAccessorType type;
+        std::optional<std::vector<float>> max;
+        std::optional<std::vector<float>> min;
+        // std::optional<JsonAccessorSparse> sparse;
+        // std::optional<std::string> name;
+        // extensions
+        // extras
+    };
+
+    NLOHMANN_DEFINE_TYPE_EXTENSION(JsonAccessor, bufferView, byteOffset, componentType, count, type, min, max);
+
+    class JsonBufferView
+    {
+    public:
+        unsigned buffer;
+        unsigned byteLength;
+        unsigned byteOffset;
+        unsigned target;
+    };
+
+    NLOHMANN_DEFINE_TYPE_EXTENSION(JsonBufferView, buffer, byteLength, byteOffset, target);
+
+    enum class JsonAnimationChannelTargetPath
+    {
+        TRANSLATION,
+        ROTATION,
+        SCALE,
+        WEIGHTS
+    };
+
+    NLOHMANN_JSON_SERIALIZE_ENUM(JsonAnimationChannelTargetPath,
+                                 {
+                                     {JsonAnimationChannelTargetPath::TRANSLATION, "translation"},
+                                     {JsonAnimationChannelTargetPath::ROTATION,    "rotation"   },
+                                     {JsonAnimationChannelTargetPath::SCALE,       "scale"      },
+                                     {JsonAnimationChannelTargetPath::WEIGHTS,     "weights"    },
+    });
+
+    class JsonAnimationChannelTarget
+    {
+    public:
+        unsigned node;
+        JsonAnimationChannelTargetPath path;
+    };
+
+    NLOHMANN_DEFINE_TYPE_EXTENSION(JsonAnimationChannelTarget, node, path);
+
+    class JsonAnimationChannel
+    {
+    public:
+        unsigned sampler;
+        JsonAnimationChannelTarget target;
+    };
+
+    NLOHMANN_DEFINE_TYPE_EXTENSION(JsonAnimationChannel, sampler, target);
+
+    enum class JsonAnimationSamplerInterpolation
+    {
+        LINEAR,
+        STEP,
+        CUBIC_SPLINE
+    };
+
+    NLOHMANN_JSON_SERIALIZE_ENUM(JsonAnimationSamplerInterpolation,
+                                 {
+                                     {JsonAnimationSamplerInterpolation::LINEAR,       "LINEAR"     },
+                                     {JsonAnimationSamplerInterpolation::STEP,         "STEP"       },
+                                     {JsonAnimationSamplerInterpolation::CUBIC_SPLINE, "CUBICSPLINE"},
+    });
+
+    class JsonAnimationSampler
+    {
+    public:
+        unsigned input;
+        std::optional<JsonAnimationSamplerInterpolation> interpolation;
+        unsigned output;
+    };
+
+    NLOHMANN_DEFINE_TYPE_EXTENSION(JsonAnimationSampler, input);
+
+    class JsonAnimation
+    {
+    public:
+        std::vector<JsonAnimationChannel> channels;
+        std::vector<JsonAnimationSampler> samplers;
+        std::optional<std::string> name;
+    };
+
+    NLOHMANN_DEFINE_TYPE_EXTENSION(JsonAnimation, channels, samplers, name);
+
+    class JsonMaterial
+    {
+    public:
+        std::optional<std::string> name;
+    };
+
+    NLOHMANN_DEFINE_TYPE_EXTENSION(JsonMaterial, name);
+
+    enum class JsonMeshPrimitivesMode
+    {
+        POINTS = 0,
+        LINES = 1,
+        LINE_LOOP = 2,
+        LINE_STRIP = 3,
+        TRIANGLES = 4,
+        TRIANGLES_STRIP = 5,
+        TRIANGLE_FAN = 6
+    };
+
+    NLOHMANN_JSON_SERIALIZE_ENUM(JsonMeshPrimitivesMode,
+                                 {
+                                     {JsonMeshPrimitivesMode::POINTS,          static_cast<unsigned>(JsonMeshPrimitivesMode::POINTS)         },
+                                     {JsonMeshPrimitivesMode::LINES,           static_cast<unsigned>(JsonMeshPrimitivesMode::LINES)          },
+                                     {JsonMeshPrimitivesMode::LINE_LOOP,       static_cast<unsigned>(JsonMeshPrimitivesMode::LINE_LOOP)      },
+                                     {JsonMeshPrimitivesMode::LINE_STRIP,      static_cast<unsigned>(JsonMeshPrimitivesMode::LINE_STRIP)     },
+                                     {JsonMeshPrimitivesMode::TRIANGLES,       static_cast<unsigned>(JsonMeshPrimitivesMode::TRIANGLES)      },
+                                     {JsonMeshPrimitivesMode::TRIANGLES_STRIP, static_cast<unsigned>(JsonMeshPrimitivesMode::TRIANGLES_STRIP)},
+                                     {JsonMeshPrimitivesMode::TRIANGLE_FAN,    static_cast<unsigned>(JsonMeshPrimitivesMode::TRIANGLE_FAN)   },
+    });
+
+    class JsonMeshPrimitives
+    {
+    public:
+        std::unordered_map<std::string, unsigned> attributes;
+        std::optional<unsigned> indices;
+        std::optional<unsigned> material;
+        std::optional<JsonMeshPrimitivesMode> mode;
+    };
+
+    NLOHMANN_DEFINE_TYPE_EXTENSION(JsonMeshPrimitives, attributes, indices, material, mode);
+
+    class JsonMesh
+    {
+    public:
+        std::vector<JsonMeshPrimitives> primitives;
+        std::optional<std::vector<float>> weights;
+    };
+
+    NLOHMANN_DEFINE_TYPE_EXTENSION(JsonMesh, primitives, weights);
+
+    class JsonSkin
+    {
+    public:
+        std::optional<unsigned> inverseBindMatrices;
+        std::optional<unsigned> skeleton;
+        std::vector<unsigned> joints;
+    };
+
+    NLOHMANN_DEFINE_TYPE_EXTENSION(JsonSkin, inverseBindMatrices, skeleton, joints);
+
+    class JsonRoot
+    {
+    public:
+        std::vector<JsonAccessor> accessors;
+        std::vector<JsonAnimation> animations;
+        JsonAsset asset;
+        std::vector<JsonBuffer> buffers;
+        std::vector<JsonBufferView> bufferViews;
+        std::vector<JsonMaterial> materials;
+        std::vector<JsonMesh> meshes;
+        std::vector<JsonNode> nodes;
+        std::vector<JsonSkin> skins;
+    };
+
+    NLOHMANN_DEFINE_TYPE_EXTENSION(JsonRoot, asset);
+} // namespace gltf