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* BoneRenderer component for visualizing skeletal hierarchy
*
* Renders bone hierarchy as connected capsule meshes with proper transformations.
* Recursively renders parent-child bone relationships for complete skeleton visualization.
*
* @module components/three/BoneRenderer
* @category 3D Components
* @korean 뼈렌더러컴포넌트
*/
import React, { useMemo } from "react";
import * as THREE from "three";
import { KOREAN_COLORS } from "../../../../types/constants";
import type {
FacialDamageState,
FacialExpression,
} from "../../../../types/facial";
import { DEFAULT_FACIAL_DAMAGE } from "../../../../types/facial";
import type { HandAnimationState } from "../../../../types/hand-animation";
import type { Bone, SkeletalRig } from "../../../../types/skeletal";
import { BoneMuscles } from "./BoneAttachedMuscles";
import Face3D from "./Face3D";
import Hand3D from "./Hand3D";
/**
* Visual amplification factor for bone thickness.
*
* Amplifies the visual difference between lean and muscular archetypes
* for more noticeable body type distinction.
*
* @korean 뼈두께시각적증폭계수
*/
const THICKNESS_AMPLIFICATION_FACTOR = 2.0;
/**
* Calculate bone thickness multiplier based on physical attributes
*
* Maps muscle mass and fat mass to bone thickness scaling for visual appearance.
* Higher muscle mass = thicker bones (more muscular skeleton).
* Higher fat mass = slightly thicker bones (more padding).
* Differences are amplified for more noticeable archetype distinction.
*
* @param muscleMass - Muscle mass in kilograms (typical: 32-42kg)
* @param fatMass - Fat mass in kilograms (typical: 9-20kg)
* @returns Thickness multiplier for bone radius (amplified range: ~0.86-1.28)
*
* @korean 뼈두께계산
*/
const calculateBoneThicknessMultiplier = (
muscleMass: number,
fatMass: number
): number => {
// Reference: 35kg muscle mass, 12kg fat mass → 1.0x thickness
const referenceMuscle = 35;
const referenceFat = 12;
// Muscle contribution (70% of thickness variation)
// Example calculations:
// - 32kg muscle (Amsalja) → sqrt(32/35) * 0.7 ≈ 0.67 contribution
// - 35kg muscle (reference) → sqrt(35/35) * 0.7 = 0.70 contribution
// - 42kg muscle (Jojik) → sqrt(42/35) * 0.7 ≈ 0.77 contribution
const muscleRatio = muscleMass / referenceMuscle;
const muscleContribution = Math.sqrt(muscleRatio) * 0.7;
// Fat contribution (30% of thickness variation)
// Example calculations:
// - 9kg fat (Amsalja) → sqrt(9/12) * 0.3 ≈ 0.26 contribution
// - 12kg fat (reference) → sqrt(12/12) * 0.3 = 0.30 contribution
// - 18kg fat (Jojik) → sqrt(18/12) * 0.3 ≈ 0.37 contribution
const fatRatio = fatMass / referenceFat;
const fatContribution = Math.sqrt(fatRatio) * 0.3;
// Combined raw thickness multiplier
// For archetype defaults:
// - Amsalja (32kg muscle, 9kg fat): 0.67 + 0.26 ≈ 0.93x raw thickness
// - Musa (38kg muscle, 12kg fat): 0.73 + 0.30 ≈ 1.03x raw thickness
// - Jojik (42kg muscle, 18kg fat): 0.77 + 0.37 ≈ 1.14x raw thickness
const rawMultiplier = muscleContribution + fatContribution;
// Apply visual amplification for more noticeable differences
// Amplified range: ~0.86x (lean Amsalja) to ~1.28x (bulky Jojik)
const deviation = rawMultiplier - 1.0;
return 1.0 + deviation * THICKNESS_AMPLIFICATION_FACTOR;
};
/**
* Props for BoneRenderer component
*
* @public
* @category Component Props
* @korean 뼈렌더러속성
*/
export interface BoneRendererProps {
/**
* Skeletal rig to render
* @korean 골격
*/
readonly rig: SkeletalRig;
/**
* Bone color
* @korean 뼈색상
*/
readonly color?: number;
/**
* Whether to show bones (for debugging)
* @korean 뼈표시여부
*/
readonly showBones?: boolean;
/**
* Render mode: 'solid' for solid meshes, 'debug' for wireframe
* @korean 렌더모드
*/
readonly renderMode?: "solid" | "debug";
/**
* Left hand animation state
* @korean 왼손애니메이션상태
*/
readonly leftHandState?: HandAnimationState;
/**
* Right hand animation state
* @korean 오른손애니메이션상태
*/
readonly rightHandState?: HandAnimationState;
/**
* Distance from camera for LOD
* @korean 카메라거리
*/
readonly cameraDistance?: number;
/**
* Current facial expression
* @korean 얼굴표정
*/
readonly facialExpression?: FacialExpression;
/**
* Facial damage state
* @korean 얼굴손상
*/
readonly facialDamage?: FacialDamageState;
/**
* Opponent position for eye tracking
* @korean 상대위치
*/
readonly opponentPosition?: THREE.Vector3;
/**
* Enable facial expressions rendering
* @korean 얼굴표정렌더링
*/
readonly enableFacialExpressions?: boolean;
/**
* Enable eye tracking
* @korean 눈추적활성화
*/
readonly enableEyeTracking?: boolean;
/**
* Physical attributes for bone thickness scaling
* @korean 신체속성
*/
readonly physicalAttributes?: {
readonly muscleMass: number;
readonly fatMass: number;
};
/**
* Muscle tension states for bone-attached muscles
* Map of muscle group name to tension level (0-1)
* @korean 근육상태들
*/
readonly muscleStates?: Map<string, number>;
/**
* Whether player is exhausted (triggers muscle shaking)
* @korean 피로여부
*/
readonly isExhausted?: boolean;
}
/**
* Single bone renderer with transformation
*
* Renders a single bone as a capsule connecting to its parent.
*
* @param bone - Bone to render
* @param color - Bone color
* @param renderMode - Render mode
* @param leftHandState - Left hand animation state
* @param rightHandState - Right hand animation state
* @param cameraDistance - Distance from camera
* @param boneThicknessMultiplier - Thickness multiplier for bone radius
* @korean 단일뼈렌더러
*/
const SingleBone: React.FC<{
readonly bone: Bone;
readonly color: number;
readonly renderMode: "solid" | "debug";
readonly leftHandState?: HandAnimationState;
readonly rightHandState?: HandAnimationState;
readonly cameraDistance?: number;
readonly facialExpression?: FacialExpression;
readonly facialDamage?: FacialDamageState;
readonly opponentPosition?: THREE.Vector3;
readonly enableFacialExpressions?: boolean;
readonly enableEyeTracking?: boolean;
readonly boneThicknessMultiplier?: number;
readonly muscleStates?: Map<string, number>;
readonly isExhausted?: boolean;
readonly physicalAttributes?: {
readonly muscleMass: number;
readonly fatMass: number;
};
}> = ({
bone,
color,
renderMode,
leftHandState,
rightHandState,
cameraDistance = 10,
facialExpression,
facialDamage,
opponentPosition,
enableFacialExpressions = false,
enableEyeTracking = true,
boneThicknessMultiplier = 1.0,
muscleStates,
isExhausted = false,
physicalAttributes,
}) => {
// Calculate bone direction and length
const boneTransform = useMemo(() => {
const length = bone.length;
// CapsuleGeometry in Three.js is aligned along the Y-axis by default (0, 1, 0)
const capsuleDefaultDirection = new THREE.Vector3(0, 1, 0);
// Calculate rotation to align with bone direction if parent exists
let rotation = new THREE.Euler(0, 0, 0);
if (bone.parent) {
// Use this bone's local position (parent → child vector) and normalize to get the direction
// Extract coordinates and manually normalize to avoid issues with Vector3 method availability
const x = bone.position.x ?? 0;
const y = bone.position.y ?? 0;
const z = bone.position.z ?? 0;
const positionLength = Math.sqrt(x * x + y * y + z * z);
Eif (positionLength > 0.001) {
// Manually normalize to get a stable direction vector
const target = new THREE.Vector3(
x / positionLength,
y / positionLength,
z / positionLength
);
// Calculate quaternion rotation from capsule's default Y-axis to target direction
const quaternion = new THREE.Quaternion().setFromUnitVectors(
capsuleDefaultDirection,
target
);
rotation = new THREE.Euler().setFromQuaternion(quaternion);
}
}
return { length, rotation };
}, [bone]);
return (
<group
position={bone.position.toArray()}
rotation={[bone.rotation.x, bone.rotation.y, bone.rotation.z]}
scale={bone.scale.toArray()}
data-testid={`bone-${bone.name}`}
>
{/* Bone capsule connecting to parent */}
{renderMode === "solid" ? (
<mesh
rotation={[
boneTransform.rotation.x,
boneTransform.rotation.y,
boneTransform.rotation.z,
]}
castShadow
receiveShadow
>
<capsuleGeometry
args={[
boneTransform.length * 0.1 * boneThicknessMultiplier, // Radius scaled by thickness
boneTransform.length, // Length unchanged
4,
8,
]}
/>
<meshStandardMaterial color={color} metalness={0.3} roughness={0.7} />
</mesh>
) : (
<mesh
rotation={[
boneTransform.rotation.x,
boneTransform.rotation.y,
boneTransform.rotation.z,
]}
>
<capsuleGeometry
args={[
boneTransform.length * 0.1 * boneThicknessMultiplier, // Radius scaled by thickness
boneTransform.length, // Length unchanged
4,
8,
]}
/>
<meshBasicMaterial
color={color}
wireframe={true}
transparent={true}
opacity={0.5}
/>
</mesh>
)}
{/* Joint sphere at bone position */}
{renderMode === "debug" && (
<mesh>
<sphereGeometry
args={[boneTransform.length * 0.15 * boneThicknessMultiplier, 8, 8]}
/>
<meshBasicMaterial color={KOREAN_COLORS.PRIMARY_CYAN} />
</mesh>
)}
{/* Render bone-attached muscles */}
{renderMode === "solid" && muscleStates && (
<BoneMuscles
boneName={bone.name}
muscleStates={muscleStates}
isExhausted={isExhausted}
physicalAttributes={physicalAttributes}
/>
)}
{/* Render children recursively */}
{bone.children.map((childBone) => (
<SingleBone
key={childBone.name}
bone={childBone}
color={color}
renderMode={renderMode}
leftHandState={leftHandState}
rightHandState={rightHandState}
cameraDistance={cameraDistance}
facialExpression={facialExpression}
facialDamage={facialDamage}
opponentPosition={opponentPosition}
enableFacialExpressions={enableFacialExpressions}
enableEyeTracking={enableEyeTracking}
boneThicknessMultiplier={boneThicknessMultiplier}
muscleStates={muscleStates}
isExhausted={isExhausted}
physicalAttributes={physicalAttributes}
/>
))}
{/* Add hands at hand bones with animation state */}
{bone.name === "hand_L" && leftHandState && (
<Hand3D
side="left"
pose={leftHandState.currentPose}
fingerCurl={leftHandState.currentFingerCurl}
distanceFromCamera={cameraDistance}
wristRotation={leftHandState.currentWristRotation}
isHighlighted={leftHandState.isHighlighted}
highlightMode={leftHandState.highlightMode}
skinColor={color}
scale={1.0}
/>
)}
{bone.name === "hand_R" && rightHandState && (
<Hand3D
side="right"
pose={rightHandState.currentPose}
fingerCurl={rightHandState.currentFingerCurl}
distanceFromCamera={cameraDistance}
wristRotation={rightHandState.currentWristRotation}
isHighlighted={rightHandState.isHighlighted}
highlightMode={rightHandState.highlightMode}
skinColor={color}
scale={1.0}
/>
)}
{/* Add facial features at head bone */}
{bone.name === "head" && enableFacialExpressions && facialExpression && (
<Face3D
expression={facialExpression}
damage={facialDamage ?? DEFAULT_FACIAL_DAMAGE}
opponentPosition={opponentPosition ?? new THREE.Vector3(5, 2, 0)}
headRotation={bone.rotation.clone()}
enableEyeTracking={enableEyeTracking}
enableDamageVisuals={true}
isMobile={cameraDistance > 15}
skinColor={color}
/>
)}
</group>
);
};
/**
* BoneRenderer component
*
* Renders complete skeletal rig with recursive bone hierarchy.
*
* @example
* ```tsx
* const rig = createHumanoidRig();
* <BoneRenderer rig={rig} color={0xFF6B6B} renderMode="solid" />
* ```
*
* @korean 뼈렌더러컴포넌트
*/
export const BoneRenderer: React.FC<BoneRendererProps> = ({
rig,
color = KOREAN_COLORS.ACCENT_RED,
showBones = true,
renderMode = "solid",
leftHandState,
rightHandState,
cameraDistance = 10,
facialExpression,
facialDamage,
opponentPosition,
enableFacialExpressions = false, // Default false to avoid breaking existing tests
enableEyeTracking = true,
physicalAttributes,
muscleStates,
isExhausted = false,
}) => {
// Calculate bone thickness multiplier from physical attributes
const boneThicknessMultiplier = useMemo(() => {
Iif (!physicalAttributes) return 1.0;
return calculateBoneThicknessMultiplier(
physicalAttributes.muscleMass,
physicalAttributes.fatMass
);
}, [physicalAttributes]);
Iif (!showBones) {
return null;
}
return (
<group data-testid="bone-renderer">
<SingleBone
bone={rig.root}
color={color}
renderMode={renderMode}
leftHandState={leftHandState}
rightHandState={rightHandState}
cameraDistance={cameraDistance}
facialExpression={facialExpression}
facialDamage={facialDamage}
opponentPosition={opponentPosition}
enableFacialExpressions={enableFacialExpressions}
enableEyeTracking={enableEyeTracking}
boneThicknessMultiplier={boneThicknessMultiplier}
muscleStates={muscleStates}
isExhausted={isExhausted}
physicalAttributes={physicalAttributes}
/>
</group>
);
};
export default BoneRenderer;
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