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* Skeletal rigging types for articulated body model
*
* Defines bone hierarchy, skeletal rig structure, and animation keyframes
* for realistic human-like fighter animations with independent limb movement.
*
* @module types/skeletal
* @category Type Definitions
* @korean 골격타입
*/
import * as THREE from "three";
/**
* Bone in skeletal rig hierarchy
*
* Represents a single bone with position, rotation, scale, and parent-child relationships.
* Bones form a tree structure for realistic articulated body movement.
*
* @public
* @category Skeletal System
* @korean 뼈
*/
export interface Bone {
/**
* Unique identifier for the bone
* @korean 이름
*/
readonly name: string;
/**
* Parent bone (null for root bone)
* @korean 부모뼈
*/
parent: Bone | null;
/**
* Local position relative to parent
* @korean 위치
*/
position: THREE.Vector3;
/**
* Local rotation in Euler angles
* @korean 회전
*/
rotation: THREE.Euler;
/**
* Local scale
* @korean 크기
*/
scale: THREE.Vector3;
/**
* Child bones
* @korean 자식뼈들
*/
children: Bone[];
/**
* Length of the bone (for rendering)
* @korean 길이
*/
readonly length: number;
/**
* Rest pose position (default pose)
* @korean 기본위치
*/
readonly restPosition: THREE.Vector3;
/**
* Rest pose rotation (default pose)
* @korean 기본회전
*/
readonly restRotation: THREE.Euler;
}
/**
* Skeletal rig with complete bone hierarchy
*
* Contains root bone and map of all bones for efficient lookup.
* Maximum 30 bones for 60fps performance.
*
* @public
* @category Skeletal System
* @korean 골격
*/
export interface SkeletalRig {
/**
* Root bone (pelvis/center)
* @korean 뿌리뼈
*/
readonly root: Bone;
/**
* Map of bone name to bone for fast lookup
* @korean 뼈맵
*/
readonly bones: Map<string, Bone>;
/**
* Total number of bones in rig
* @korean 뼈개수
*/
readonly boneCount: number;
}
/**
* Animation keyframe for skeletal animation
*
* Defines bone transformations at a specific time in the animation.
* Keyframes are interpolated for smooth animation between poses.
*
* @public
* @category Animation
* @korean 애니메이션키프레임
*/
export interface AnimationKeyframe {
/**
* Time in seconds from animation start
* @korean 시간
*/
readonly time: number;
/**
* Bone rotations at this keyframe
* Map of bone name to rotation
* @korean 뼈회전들
*/
readonly boneRotations: Map<string, THREE.Euler>;
/**
* Bone positions at this keyframe (optional, for IK or special moves)
* Map of bone name to position offset from rest pose
* @korean 뼈위치들
*/
readonly bonePositions: Map<string, THREE.Vector3>;
/**
* Optional easing function name for interpolation
* @korean 이징함수
*/
readonly easing?: "linear" | "ease-in" | "ease-out" | "ease-in-out";
}
/**
* Attack animation type categories
*
* Defines the 5 base categories of attack animations with variants.
* Each technique maps to one of these animation types.
*
* @public
* @category Animation
* @korean 공격애니메이션타입
*/
export enum AttackAnimationType {
// Punch category (주먹 타격)
PUNCH_HIGH = "punch_high",
PUNCH_MID = "punch_mid",
PUNCH_LOW = "punch_low",
// Kick category (발차기)
KICK_FRONT = "kick_front",
KICK_SIDE = "kick_side",
KICK_ROUNDHOUSE = "kick_round",
// Elbow category (팔꿈치 타격)
ELBOW_STRIKE = "elbow_strike",
ELBOW_UPPERCUT = "elbow_uppercut",
// Knee category (무릎 타격)
KNEE_STRIKE = "knee_strike",
KNEE_CLINCH = "knee_clinch",
// Pressure point category (급소 타격)
PRESSURE_POINT = "pressure_point",
PRESSURE_POINT_RAPID = "pressure_point_rapid",
}
/**
* Animation configuration for a technique
*
* Links a technique to its specific attack animation with speed modifier.
*
* @public
* @category Animation
* @korean 기술애니메이션설정
*/
export interface TechniqueAnimationConfig {
/**
* Type of attack animation to play
* @korean 애니메이션타입
*/
readonly type: AttackAnimationType;
/**
* Speed modifier (0.8-1.2)
* - Light techniques: 1.2x speed
* - Normal techniques: 1.0x speed
* - Heavy techniques: 0.8x speed
* @korean 속도배율
*/
readonly speedModifier: number;
}
/**
* Complete skeletal animation sequence
*
* Sequence of keyframes defining a complete animation
* (e.g., jab, cross, roundhouse kick).
*
* @public
* @category Animation
* @korean 골격애니메이션
*/
export interface SkeletalAnimation {
/**
* Animation identifier
* @korean 이름
*/
readonly name: string;
/**
* Korean name for animation
* @korean 한글이름
*/
readonly koreanName: string;
/**
* Animation keyframes in chronological order
* @korean 키프레임들
*/
readonly keyframes: AnimationKeyframe[];
/**
* Total duration in seconds
* @korean 지속시간
*/
readonly duration: number;
/**
* Whether animation loops
* @korean 반복여부
*/
readonly loop: boolean;
/**
* Animation type (attack, defense, stance change, movement, etc.)
* @korean 애니메이션타입
*/
readonly type: "attack" | "defense" | "stance" | "walk" | "idle" | "movement";
}
/**
* Bone chain definition for IK (Inverse Kinematics)
*
* Defines a chain of bones for IK solving (e.g., arm chain, leg chain).
* Used for realistic limb positioning and movement.
*
* @public
* @category Skeletal System
* @korean 뼈체인
*/
export interface BoneChain {
/**
* Chain identifier
* @korean 이름
*/
readonly name: string;
/**
* Start bone (e.g., shoulder for arm chain)
* @korean 시작뼈
*/
readonly startBone: string;
/**
* End bone (e.g., hand for arm chain)
* @korean 끝뼈
*/
readonly endBone: string;
/**
* Bones in chain from start to end
* @korean 뼈들
*/
readonly bones: string[];
/**
* IK target position (for end effector)
* @korean IK목표
*/
ikTarget?: THREE.Vector3;
}
/**
* Hand bone structure with 5 fingers
*
* Simplified hand model with palm and 5 fingers.
* Each finger has 3 segments (proximal, middle, distal).
*
* @public
* @category Skeletal System
* @korean 손뼈
*/
export interface HandBones {
/**
* Palm bone
* @korean 손바닥
*/
readonly palm: Bone;
/**
* Thumb bones (3 segments)
* @korean 엄지손가락
*/
readonly thumb: [Bone, Bone, Bone];
/**
* Index finger bones (3 segments)
* @korean 검지손가락
*/
readonly index: [Bone, Bone, Bone];
/**
* Middle finger bones (3 segments)
* @korean 중지손가락
*/
readonly middle: [Bone, Bone, Bone];
/**
* Ring finger bones (3 segments)
* @korean 약지손가락
*/
readonly ring: [Bone, Bone, Bone];
/**
* Pinky finger bones (3 segments)
* @korean 새끼손가락
*/
readonly pinky: [Bone, Bone, Bone];
}
/**
* Joint constraint for realistic movement
*
* Defines rotation limits for joints (e.g., elbow can't bend backward).
* Ensures anatomically correct movement.
*
* @public
* @category Skeletal System
* @korean 관절제약
*/
export interface JointConstraint {
/**
* Bone name this constraint applies to
* @korean 뼈이름
*/
readonly boneName: string;
/**
* Minimum rotation angles (X, Y, Z) in radians
* @korean 최소회전
*/
readonly minRotation: THREE.Vector3;
/**
* Maximum rotation angles (X, Y, Z) in radians
* @korean 최대회전
*/
readonly maxRotation: THREE.Vector3;
/**
* Whether this joint can twist (rotate around its length)
* @korean 비틀기가능
*/
readonly canTwist: boolean;
}
/**
* Bone names for humanoid rig
*
* Standard bone naming convention for humanoid skeleton.
* Total: 28 bones base + optional 38 hand bones (19 per hand) = 66 bones max.
*
* Hand bones are optional and can be excluded for performance (LOD system).
*
* @public
* @category Skeletal System
* @korean 뼈이름들
*/
export enum BoneName {
// Core (1 bone)
PELVIS = "pelvis",
// Spine (3 bones)
SPINE_LOWER = "spine_lower",
SPINE_MIDDLE = "spine_middle",
SPINE_UPPER = "spine_upper",
// Head (2 bones)
NECK = "neck",
HEAD = "head",
// Left Arm (6 bones)
SHOULDER_L = "shoulder_L",
UPPER_ARM_L = "upper_arm_L",
ELBOW_L = "elbow_L",
FOREARM_L = "forearm_L",
WRIST_L = "wrist_L",
HAND_L = "hand_L",
// Right Arm (6 bones)
SHOULDER_R = "shoulder_R",
UPPER_ARM_R = "upper_arm_R",
ELBOW_R = "elbow_R",
FOREARM_R = "forearm_R",
WRIST_R = "wrist_R",
HAND_R = "hand_R",
// Left Leg (5 bones)
HIP_L = "hip_L",
THIGH_L = "thigh_L",
KNEE_L = "knee_L",
SHIN_L = "shin_L",
FOOT_L = "foot_L",
// Right Leg (5 bones)
HIP_R = "hip_R",
THIGH_R = "thigh_R",
KNEE_R = "knee_R",
SHIN_R = "shin_R",
FOOT_R = "foot_R",
// Left Hand Fingers (19 bones - optional for LOD)
THUMB_META_L = "thumb_meta_L",
THUMB_PROX_L = "thumb_prox_L",
THUMB_DIST_L = "thumb_dist_L",
INDEX_META_L = "index_meta_L",
INDEX_PROX_L = "index_prox_L",
INDEX_INTER_L = "index_inter_L",
INDEX_DIST_L = "index_dist_L",
MIDDLE_META_L = "middle_meta_L",
MIDDLE_PROX_L = "middle_prox_L",
MIDDLE_INTER_L = "middle_inter_L",
MIDDLE_DIST_L = "middle_dist_L",
RING_META_L = "ring_meta_L",
RING_PROX_L = "ring_prox_L",
RING_INTER_L = "ring_inter_L",
RING_DIST_L = "ring_dist_L",
PINKY_META_L = "pinky_meta_L",
PINKY_PROX_L = "pinky_prox_L",
PINKY_INTER_L = "pinky_inter_L",
PINKY_DIST_L = "pinky_dist_L",
// Right Hand Fingers (19 bones - optional for LOD)
THUMB_META_R = "thumb_meta_R",
THUMB_PROX_R = "thumb_prox_R",
THUMB_DIST_R = "thumb_dist_R",
INDEX_META_R = "index_meta_R",
INDEX_PROX_R = "index_prox_R",
INDEX_INTER_R = "index_inter_R",
INDEX_DIST_R = "index_dist_R",
MIDDLE_META_R = "middle_meta_R",
MIDDLE_PROX_R = "middle_prox_R",
MIDDLE_INTER_R = "middle_inter_R",
MIDDLE_DIST_R = "middle_dist_R",
RING_META_R = "ring_meta_R",
RING_PROX_R = "ring_prox_R",
RING_INTER_R = "ring_inter_R",
RING_DIST_R = "ring_dist_R",
PINKY_META_R = "pinky_meta_R",
PINKY_PROX_R = "pinky_prox_R",
PINKY_INTER_R = "pinky_inter_R",
PINKY_DIST_R = "pinky_dist_R",
}
/**
* Animation state for skeletal player
*
* Tracks current animation playback state for skeletal animations.
*
* @public
* @category Animation
* @korean 애니메이션상태
*/
export interface SkeletalAnimationState {
/**
* Current animation being played
* @korean 현재애니메이션
*/
currentAnimation: SkeletalAnimation | null;
/**
* Current time in animation (seconds)
* @korean 현재시간
*/
currentTime: number;
/**
* Whether animation is playing
* @korean 재생중
*/
isPlaying: boolean;
/**
* Animation playback speed multiplier
* @korean 재생속도
*/
playbackSpeed: number;
/**
* Previous keyframe index
* @korean 이전키프레임
*/
previousKeyframeIndex: number;
/**
* Next keyframe index
* @korean 다음키프레임
*/
nextKeyframeIndex: number;
}
/**
* Fighting stance guard pose configuration
*
* Defines complete body positioning for authentic Korean martial arts stances.
* Includes arms, torso, legs, and pelvis rotations based on traditional Taekwondo/Hapkido.
*
* Each stance corresponds to a real martial arts position with unique leg positioning.
* Used for stance-specific idle animations at 60fps.
*
* @public
* @category Animation
* @korean 자세방어포즈
*/
export interface StanceGuardPose {
/**
* Left arm bone rotations (shoulder, elbow, wrist)
* @korean 왼팔
*/
readonly leftArm: {
readonly shoulder: THREE.Euler;
readonly elbow: THREE.Euler;
readonly wrist: THREE.Euler;
};
/**
* Right arm bone rotations (shoulder, elbow, wrist)
* @korean 오른팔
*/
readonly rightArm: {
readonly shoulder: THREE.Euler;
readonly elbow: THREE.Euler;
readonly wrist: THREE.Euler;
};
/**
* Torso rotation (spine upper bone)
* @korean 몸통회전
*/
readonly torso: THREE.Euler;
/**
* Left leg bone rotations (hip, knee, ankle)
* NEW: For authentic Taekwondo stance positioning
* @korean 왼다리
*/
readonly leftLeg: {
readonly hip: THREE.Euler; // Hip rotation/abduction
readonly knee: THREE.Euler; // Knee bend angle
readonly ankle: THREE.Euler; // Ankle dorsiflexion/plantarflexion
};
/**
* Right leg bone rotations (hip, knee, ankle)
* NEW: For authentic Taekwondo stance positioning
* @korean 오른다리
*/
readonly rightLeg: {
readonly hip: THREE.Euler; // Hip rotation/abduction
readonly knee: THREE.Euler; // Knee bend angle
readonly ankle: THREE.Euler; // Ankle dorsiflexion/plantarflexion
};
/**
* Pelvis rotation (hip tilt and rotation)
* NEW: For proper stance base
* @korean 골반회전
*/
readonly pelvis: THREE.Euler;
/**
* Stance width (foot spacing in meters)
* NEW: Defines lateral distance between feet
* Range: 0.3 (narrow) to 1.5 (wide horse stance)
*
* This value describes the intended lateral spacing between the feet for this
* stance configuration. Consumers (e.g. animation systems or positioning
* overlays) may use it to drive foot placement, validation, or visualization
* as needed.
*
* @korean 자세너비
*/
readonly stanceWidth: number;
/**
* Weight distribution (forward/neutral/back)
* @korean 무게중심
*/
readonly weight: "forward" | "neutral" | "back";
/**
* Breathing animation range (min/max for chest movement)
* @korean 호흡범위
*/
readonly breathingRange: {
readonly min: number;
readonly max: number;
};
}
/**
* Stance guard animation configuration
*
* Extends base AnimationConfig with stance-specific guard pose data.
* Includes 4-6 frame breathing animation for realistic idle behavior.
*
* @public
* @category Animation
* @korean 자세방어애니메이션설정
*/
export interface StanceGuardAnimationConfig {
/**
* Trigram stance identifier
* @korean 괘
*/
readonly stance: string;
/**
* Korean name of stance
* @korean 한글이름
*/
readonly koreanName: string;
/**
* English name of stance
* @korean 영어이름
*/
readonly englishName: string;
/**
* Guard pose keyframe (default position)
* @korean 방어포즈
*/
readonly guardPose: StanceGuardPose;
/**
* Breathing animation frames (4-6 frames)
* @korean 호흡프레임
*/
readonly breathingFrames: number;
/**
* Target frames per second (60fps)
* @korean 초당프레임
*/
readonly fps: number;
/**
* Breathing cycle loop enabled
* @korean 반복여부
*/
readonly loop: boolean;
/**
* Animation priority (0 for idle guards)
* @korean 우선순위
*/
readonly priority: number;
}
/**
* Mirror a guard pose for left/right stance laterality.
*
* **Korean**: 자세 좌우 대칭
*
* Creates a mirror-image guard pose by swapping left and right limb positions
* and negating lateral (Y-axis and Z-axis) rotations. This enables authentic
* left/right stance differentiation in Korean martial arts.
*
* Key transformations:
* - Swap leftArm ↔ rightArm bone rotations
* - Negate Y rotation (lateral twist)
* - Negate Z rotation (roll)
* - Preserve X rotation (forward/back bend)
* - Keep weight distribution and breathing range unchanged
*
* @param pose - Original guard pose to mirror
* @returns Mirrored guard pose with swapped and negated rotations
*
* @example
* ```typescript
* // Create right-handed version of a left-handed guard
* const leftGeonGuard = GEON_HIGH_GUARD_POSE;
* const rightGeonGuard = mirrorGuardPose(leftGeonGuard);
*
* // leftGeonGuard has left hand forward
* // rightGeonGuard has right hand forward (mirrored)
* ```
*
* @public
* @category Animation
* @korean 방어포즈대칭
*/
export function mirrorGuardPose(pose: StanceGuardPose): StanceGuardPose {
// Helper to negate Y and Z rotations while preserving X
const mirrorEuler = (euler: THREE.Euler): THREE.Euler => {
return new THREE.Euler(
euler.x, // Preserve forward/back bend
-euler.y, // Negate lateral twist
-euler.z // Negate roll
);
};
return {
// Swap left and right arms with mirrored rotations
leftArm: {
shoulder: mirrorEuler(pose.rightArm.shoulder),
elbow: mirrorEuler(pose.rightArm.elbow),
wrist: mirrorEuler(pose.rightArm.wrist),
},
rightArm: {
shoulder: mirrorEuler(pose.leftArm.shoulder),
elbow: mirrorEuler(pose.leftArm.elbow),
wrist: mirrorEuler(pose.leftArm.wrist),
},
// Mirror torso rotation
torso: mirrorEuler(pose.torso),
// NEW: Swap and mirror leg positions
leftLeg: {
hip: mirrorEuler(pose.rightLeg.hip),
knee: mirrorEuler(pose.rightLeg.knee),
ankle: mirrorEuler(pose.rightLeg.ankle),
},
rightLeg: {
hip: mirrorEuler(pose.leftLeg.hip),
knee: mirrorEuler(pose.leftLeg.knee),
ankle: mirrorEuler(pose.leftLeg.ankle),
},
// Mirror pelvis rotation
pelvis: mirrorEuler(pose.pelvis),
// Stance width remains the same
stanceWidth: pose.stanceWidth,
// Weight distribution remains the same
weight: pose.weight,
// Breathing range unchanged (not affected by laterality, reuse original object)
breathingRange: pose.breathingRange,
};
}
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