VRM 1.0 parsing support

Package.swift

@@ -18,12 +18,12 @@ let package = Package(
         .testTarget(
             name: "VRMKitTests",
             dependencies: ["VRMKit"],
-            resources: [.copy("Assets/AliciaSolid.vrm")]
+            resources: [.copy("Assets/AliciaSolid.vrm"), .copy("Assets/Seed-san.vrm")]
         ),
         .testTarget(
             name: "VRMSceneKitTests",
             dependencies: ["VRMSceneKit"],
-            resources: [.copy("Assets/AliciaSolid.vrm")]
+            resources: [.copy("Assets/AliciaSolid.vrm"), .copy("Assets/Seed-san.vrm")]
         ),
     ]
 )

Sources/VRMKit/Extensions/GlobalFunction.swift

@@ -27,3 +27,4 @@ func ???<T>(lhs: T?,
     guard let value = lhs else { throw error() }
     return value
 }
+

Sources/VRMKit/VRM/Material.swift

@@ -13,7 +13,7 @@ import Foundation
 extension GLTF {
     public struct Material: Codable {
         public let name: String?
-        public let extensions: CodableAny?
+        public let extensions: MaterialExtensions?
         public let extras: CodableAny?
         public let pbrMetallicRoughness: PbrMetallicRoughness?
         public let normalTexture: NormalTextureInfo?
@@ -102,5 +102,72 @@ extension GLTF {
             case MASK
             case BLEND
         }
+
+        public struct MaterialExtensions: Codable {
+            public let materialsMToon: MaterialsMToon?
+
+            private enum CodingKeys: String, CodingKey {
+                case materialsMToon = "VRMC_materials_mtoon"
+            }
+
+            public struct MaterialsMToon: Codable {
+                public let specVersion: String
+                public let transparentWithZWrite: Bool?
+                public let renderQueueOffsetNumber: Int?
+                public let shadeColorFactor: [Double]?
+                public let shadeMultiplyTexture: MaterialsMToonTextureInfo?
+                public let shadingShiftFactor: Double?
+                public let shadingShiftTexture: MaterialsMToonShadingShiftTexture?
+                public let shadingToonyFactor: Double?
+                public let giEqualizationFactor: Double?
+                public let matcapFactor: [Double]?
+                public let matcapTexture: MaterialsMToonTextureInfo?
+                public let parametricRimColorFactor: [Double]?
+                public let rimMultiplyTexture: MaterialsMToonTextureInfo?
+                public let rimLightingMixFactor: Double?
+                public let parametricRimFresnelPowerFactor: Double?
+                public let parametricRimLiftFactor: Double?
+                public let outlineWidthMode: MaterialsMToonOutlineWidthMode?
+                public let outlineWidthFactor: Double?
+                public let outlineWidthMultiplyTexture: MaterialsMToonTextureInfo?
+                public let outlineColorFactor: [Double]?
+                public let outlineLightingMixFactor: Double?
+                public let uvAnimationMaskTexture: MaterialsMToonTextureInfo?
+                public let uvAnimationScrollXSpeedFactor: Double?
+                public let uvAnimationScrollYSpeedFactor: Double?
+                public let uvAnimationRotationSpeedFactor: Double?
+                public let extensions: CodableAny?
+                public let extras: CodableAny?
+
+                public struct MaterialsMToonTextureInfo: Codable {
+                    public let index: Int
+                    public let texCoord: Int?
+                    public let extensions: CodableAny?
+                    public let extras: CodableAny?
+
+                    public init(from decoder: Decoder) throws {
+                        let container = try decoder.container(keyedBy: CodingKeys.self)
+                        index = try container.decode(Int.self, forKey: .index)
+                        texCoord = try container.decodeIfPresent(Int.self, forKey: .texCoord)
+                        extensions = try container.decodeIfPresent(CodableAny.self, forKey: .extensions)
+                        extras = try container.decodeIfPresent(CodableAny.self, forKey: .extras)
+                    }
+                }
+
+                public struct MaterialsMToonShadingShiftTexture: Codable {
+                    public let index: Int
+                    public let texCoord: Int?
+                    public let scale: Double?
+                    public let extensions: CodableAny?
+                    public let extras: CodableAny?
+                }
+
+                public enum MaterialsMToonOutlineWidthMode: String, Codable {
+                    case none
+                    case worldCoordinates
+                    case screenCoordinates
+                }
+            }
+        }
     }
 }

Sources/VRMKit/VRM/Node.swift

@@ -34,7 +34,7 @@ extension GLTF {
         }
         public let weights: [Float]?
         public let name: String?
-        public let extensions: CodableAny?
+        public let extensions: NodeExtensions?
         public let extras: CodableAny?
 
         private enum CodingKeys: String, CodingKey {
@@ -51,5 +51,75 @@ extension GLTF {
             case extensions
             case extras
         }
+
+        public struct NodeExtensions: Codable {
+            public let nodeConstraint: NodeConstraint?
+
+            private enum CodingKeys: String, CodingKey {
+                case nodeConstraint = "VRMC_node_constraint"
+            }
+
+            public struct NodeConstraint: Codable {
+                public let specVersion: String
+                public let constraint: Constraint
+                public let extensions: CodableAny?
+                public let extras: CodableAny?
+
+                public struct Constraint: Codable {
+                    public let roll: RollConstraint?
+                    public let aim: AimConstraint?
+                    public let rotation: RotationConstraint?
+                    public let extensions: CodableAny?
+                    public let extras: CodableAny?
+
+                    public struct RollConstraint: Codable {
+                        public let source: Int
+                        public let rollAxis: RollAxis
+                        public let weight: Double?
+                        public let extensions: CodableAny?
+                        public let extras: CodableAny?
+
+                        public enum RollAxis: String, Codable {
+                            case X
+                            case Y
+                            case Z
+                        }
+                    }
+
+                    public struct AimConstraint: Codable {
+                        public let source: Int
+                        public let aimAxis: AimAxis
+                        public let weight: Double?
+                        public let extensions: CodableAny?
+                        public let extras: CodableAny?
+
+                        public enum AimAxis: String, Codable {
+                            case positiveX
+                            case negativeX
+                            case positiveY
+                            case negativeY
+                            case positiveZ
+                            case negativeZ
+
+                            private enum CodingKeys: String, CodingKey {
+                                case positiveX = "PositiveX"
+                                case negativeX = "NegativeX"
+                                case positiveY = "PositiveY"
+                                case negativeY = "NegativeY"
+                                case positiveZ = "PositiveZ"
+                                case negativeZ = "NegativeZ"
+                            }
+                        }
+                    }
+
+                    public struct RotationConstraint: Codable {
+                        public let source: Int
+                        public let weight: Double?
+                        public let extensions: CodableAny?
+                        public let extras: CodableAny?
+                    }
+                }
+            }
+        }
     }
 }

Sources/VRMKit/VRM/VRM.swift

@@ -8,7 +8,7 @@
 
 import Foundation
 
-public struct VRM {
+public struct VRM: VRMFile {
     public let gltf: BinaryGLTF
     public let meta: Meta
     public let version: String?