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* SkeletalPlayer3D component with articulated body model
*
* Implements full skeletal rigging system for realistic fighter animations
* with independent limb movement, elbow/knee joints, and attack animations.
*
* @module components/three/SkeletalPlayer3D
* @category 3D Components
* @korean 골격플레이어3D컴포넌트
*/
import { Html } from "@react-three/drei";
import { useFrame } from "@react-three/fiber";
import React, { useEffect, useMemo, useRef, useState } from "react";
import * as THREE from "three";
import { getArchetypePhysicalAttributes } from "../../../../data/archetypePhysicalAttributes";
import {
createDefaultFacialDamage,
createScaledHumanoidRig,
getExpressionFromCombatState,
getFacingAngleRadians,
getHeadAngleRadians,
lockFacing,
unlockFacing,
updateFacingTowardOpponent,
} from "../../../../systems/animation";
import { useBalanceAnimations } from "../../../../hooks/useBalanceAnimations";
import { useGuardPoseOverlay } from "../../../../hooks/useGuardPoseOverlay";
import { useHandPoseTransitions } from "../../../../hooks/useHandPoseTransitions";
import { useMuscleActivation } from "../../../../hooks/useMuscleActivation";
import { useSkeletalAnimation } from "../../../../hooks/useSkeletalAnimation";
import { FONT_FAMILY, KOREAN_COLORS } from "../../../../types/constants";
import { FacialExpression } from "../../../../types/facial";
import type {
Player3DUnifiedProps,
} from "../../../../types/player-visual";
import type {
SkeletalRig,
} from "../../../../types/skeletal";
import { toHexColor } from "../../../../utils/colorHelpers";
import { getArchetypeColors } from "../../../../utils/colorUtils";
import BoneRenderer from "../anatomy/BoneRenderer";
import PlayerStateIndicators from "../effects/PlayerStateIndicators";
/**
* Get stance-specific color from Korean theming
*
* @param stance - Current trigram stance
* @returns Hex color number
* @korean 자세색상가져오기
*/
const getStanceColor = (stance: string): number => {
const stanceColors: Record<string, number> = {
geon: KOREAN_COLORS.TRIGRAM_GEON_PRIMARY,
tae: KOREAN_COLORS.TRIGRAM_TAE_PRIMARY,
li: KOREAN_COLORS.TRIGRAM_LI_PRIMARY,
jin: KOREAN_COLORS.TRIGRAM_JIN_PRIMARY,
son: KOREAN_COLORS.TRIGRAM_SON_PRIMARY,
gam: KOREAN_COLORS.TRIGRAM_GAM_PRIMARY,
gan: KOREAN_COLORS.TRIGRAM_GAN_PRIMARY,
gon: KOREAN_COLORS.TRIGRAM_GON_PRIMARY,
};
return stanceColors[stance] ?? KOREAN_COLORS.PRIMARY_CYAN;
};
/**
* Get trigram symbol for stance
*
* @param stance - Current trigram stance
* @returns Unicode trigram symbol
* @korean 팔괘기호가져오기
*/
const getTrigramSymbol = (stance: string): string => {
const symbols: Record<string, string> = {
geon: "☰",
tae: "☱",
li: "☲",
jin: "☳",
son: "☴",
gam: "☵",
gan: "☶",
gon: "☷",
};
return symbols[stance] ?? "☰";
};
/**
* SkeletalPlayer3D Component
*
* Complete skeletal player with 28-bone rig and realistic animations.
* Supports all Korean martial arts attack animations (jab, cross, kicks, block).
*
* @example
* ```tsx
* <SkeletalPlayer3D
* playerId="player1"
* archetype={PlayerArchetype.MUSA}
* stance={TrigramStance.GEON}
* position={[0, 0, 0]}
* rotation={0}
* health={85}
* maxHealth={100}
* stamina={60}
* ki={40}
* currentAnimation="attack"
* attackAnimation="jab"
* showDetails={true}
* />
* ```
*
* @korean 골격플레이어3D컴포넌트
*/
export const SkeletalPlayer3D: React.FC<
Player3DUnifiedProps & {
readonly attackAnimation?: string;
readonly showSkeleton?: boolean;
}
> = ({
playerId,
archetype,
stance,
laterality = "right",
position,
rotation,
health,
maxHealth,
stamina,
ki,
pain,
balance,
consciousness,
bloodLoss,
isBlocking,
isStunned = false,
isCountering = false,
currentAnimation,
isMobile,
name,
scale = 1,
showDetails = true,
facing = "right",
showStanceIndicator = true,
onAnimationComplete,
attackAnimation,
showSkeleton = false,
facialExpression,
facialDamage,
enableFacialExpressions = false,
enableEyeTracking = true,
opponentPosition,
bodyFacing,
onBodyFacingUpdate,
}) => {
// Get physical attributes for the archetype
const physicalAttributes = useMemo(
() => getArchetypePhysicalAttributes(archetype),
[archetype]
);
// Create skeletal rig with scaled dimensions based on archetype
const rig = useMemo<SkeletalRig>(
() => createScaledHumanoidRig(physicalAttributes),
[physicalAttributes]
);
// ========================================
// ANIMATION HOOKS - Modular animation system
// ========================================
// Base skeletal animation (idle, walk, attack, etc.)
const { updateRigAnimation, diagonalRotationY } =
useSkeletalAnimation({
currentAnimation,
attackAnimation,
isBlocking,
onAnimationComplete,
});
// Hand pose transitions for both hands
const { leftHandState, rightHandState, updateHandAnimations } =
useHandPoseTransitions({
currentAnimation,
attackAnimation,
isBlocking,
});
// Guard pose overlay (stance-specific positioning)
const { applyGuardOverlay } = useGuardPoseOverlay({
stance,
laterality,
currentAnimation,
});
// Balance animations (sway, stumble, lean based on balance state)
const { swayPosition, helplessRotation, updateBalanceAnimations } =
useBalanceAnimations({
balance,
});
// Muscle activation system
const { muscleStates, updateMuscleActivations } = useMuscleActivation({
currentAnimation,
attackAnimation,
isBlocking,
stamina,
});
// Get archetype colors
const archetypeColors = useMemo(
() => getArchetypeColors(archetype),
[archetype]
);
// Body color based on state
const bodyColor = useMemo(() => {
Iif (isStunned) return KOREAN_COLORS.WARNING_YELLOW;
if (health / maxHealth < 0.3) return KOREAN_COLORS.ACCENT_RED;
Eif (ki / 100 > 0.8) return KOREAN_COLORS.PRIMARY_CYAN;
return archetypeColors.primary;
}, [isStunned, health, maxHealth, ki, archetypeColors.primary]);
// Stance color
const stanceColor = useMemo(() => getStanceColor(stance), [stance]);
const trigramSymbol = useMemo(() => getTrigramSymbol(stance), [stance]);
// Track recent combat events for expression calculation
const [justHit, setJustHit] = useState(false);
const [justLanded, setJustLanded] = useState(false);
const lastHealthRef = useRef(health);
// Detect hit events (health decreased)
useEffect(() => {
let timeoutId: ReturnType<typeof setTimeout> | undefined;
Iif (health < lastHealthRef.current) {
setJustHit(true);
timeoutId = setTimeout(() => setJustHit(false), 1000); // Clear after 1 second
}
lastHealthRef.current = health;
return () => {
Iif (timeoutId !== undefined) {
clearTimeout(timeoutId);
}
};
}, [health]);
// Detect successful attacks (currentAnimation changed to attack)
useEffect(() => {
let timeoutId: ReturnType<typeof setTimeout> | undefined;
Iif (currentAnimation === "attack") {
setJustLanded(true);
timeoutId = setTimeout(() => setJustLanded(false), 500); // Clear after 0.5 seconds
}
return () => {
Iif (timeoutId !== undefined) {
clearTimeout(timeoutId);
}
};
}, [currentAnimation]);
// Calculate facial expression from combat state (or use provided one)
const calculatedExpression = useMemo(() => {
Iif (!enableFacialExpressions) {
return FacialExpression.NEUTRAL;
}
Iif (facialExpression) {
return facialExpression;
}
return getExpressionFromCombatState(
health,
maxHealth,
stamina,
pain,
consciousness,
justHit,
justLanded
);
}, [
enableFacialExpressions,
facialExpression,
health,
maxHealth,
stamina,
pain,
consciousness,
justHit,
justLanded,
]);
// Facial damage state
const calculatedFacialDamage = useMemo(() => {
return facialDamage ?? createDefaultFacialDamage();
}, [facialDamage]);
// Opponent position for eye tracking
const opponentPos = useMemo(() => {
Eif (opponentPosition) {
return new THREE.Vector3(...opponentPosition);
}
// Default: opponent in front
return new THREE.Vector3(facing === "right" ? 5 : -5, 2, 0);
}, [opponentPosition, facing]);
// ========================================
// ANIMATION FRAME LOOP - Modular hook-based system
// ========================================
// Frame counter for periodic updates
const frameCounter = useRef(0);
// Animation loop using useFrame (60fps)
useFrame((_state, delta) => {
// Update body facing to track opponent (if enabled)
if (bodyFacing && opponentPosition && onBodyFacingUpdate) {
const playerPos = { x: position[0], y: position[2] }; // X and Z for 2D top-down
const opponentPos = { x: opponentPosition[0], y: opponentPosition[2] };
// Check if facing should be locked during committed animations
const isStepAnimation =
typeof currentAnimation === "string" &&
currentAnimation.startsWith("step_");
const isTurnAnimation =
typeof currentAnimation === "string" &&
currentAnimation.startsWith("turn_");
const shouldLock =
currentAnimation === "attack" ||
currentAnimation === "defend" ||
isStepAnimation ||
isTurnAnimation;
let updatedFacing = bodyFacing;
if (shouldLock && !bodyFacing.isLocked) {
// Lock facing at start of committed action (attack/defend/step/turn)
updatedFacing = lockFacing(bodyFacing);
} else if (!shouldLock && bodyFacing.isLocked) {
// Unlock facing after committed action completes
updatedFacing = unlockFacing(bodyFacing);
}
// Update facing direction (handles rotation speed, head tracking, turns)
if (!updatedFacing.isLocked) {
updatedFacing = updateFacingTowardOpponent(
updatedFacing,
playerPos,
opponentPos,
delta,
Date.now()
);
}
// Notify parent if facing changed
if (updatedFacing !== bodyFacing) {
onBodyFacingUpdate(updatedFacing);
}
}
// ========================================
// HOOK-BASED ANIMATION UPDATES (60fps)
// ========================================
// Update frame counter for periodic state sync
frameCounter.current = (frameCounter.current + 1) % 10;
// 1. Base skeletal animation (idle, walk, attack, etc.)
updateRigAnimation(rig, delta);
// 2. Hand pose transitions
updateHandAnimations(delta);
// 3. Guard pose overlay (stance-specific positioning)
applyGuardOverlay(rig, delta);
// 4. Balance animations (sway, stumble, lean)
updateBalanceAnimations(delta, frameCounter.current);
// 5. Muscle activation states
updateMuscleActivations(delta, frameCounter.current);
// Apply body facing rotations (torso and head) if available
// Note: This system already supports independent torso rotation via bodyFacing.torsoRotation
// The torso rotation can be calculated using calculateTorsoRotation() from SkeletonRig
// and integrated into bodyFacing state for dynamic upper/lower body separation
if (bodyFacing) {
// Apply torso rotation to spine bone from body facing
// This rotation is relative to hips and allows strafing while facing opponent
const spine = rig.bones.get("spine_upper");
if (spine) {
// Use torso rotation if available, otherwise fall back to full body facing
const torsoRotation = bodyFacing.torsoRotation ?? getFacingAngleRadians(bodyFacing);
spine.rotation.y = torsoRotation;
}
// Apply head rotation to head bone (includes independent offset)
// Head can track ±45° independently from torso for natural looking
const head = rig.bones.get("head");
if (head) {
const headRotation = getHeadAngleRadians(bodyFacing);
head.rotation.y = headRotation;
}
}
});
// Use diagonal rotation override if set, otherwise use prop rotation
const effectiveRotation = diagonalRotationY ?? rotation;
return (
<group
position={position}
rotation={[0, effectiveRotation, 0]}
scale={[facing === "left" ? -scale : scale, scale, scale]}
data-testid={`skeletal-player3d-${playerId}`}
>
{/* Inner group for sway animation and helpless lean */}
<group position={swayPosition} rotation={[helplessRotation, 0, 0]}>
{/* Skeletal rig rendering with bone-attached muscles */}
<BoneRenderer
rig={rig}
color={bodyColor}
showBones={true}
renderMode={showSkeleton ? "debug" : "solid"}
leftHandState={leftHandState}
rightHandState={rightHandState}
cameraDistance={10}
facialExpression={calculatedExpression}
facialDamage={calculatedFacialDamage}
opponentPosition={opponentPos}
enableFacialExpressions={enableFacialExpressions}
enableEyeTracking={enableEyeTracking}
physicalAttributes={{
muscleMass: physicalAttributes.muscleMass,
fatMass: physicalAttributes.fatMass,
}}
muscleStates={muscleStates}
isExhausted={stamina < 20}
/>
{/* Blocking shield effect */}
{isBlocking && (
<mesh position={[0, 1.2, 0.3]}>
<circleGeometry args={[0.5, 32]} />
<meshBasicMaterial
color={KOREAN_COLORS.PRIMARY_BLUE}
transparent
opacity={0.5}
side={2}
/>
</mesh>
)}
{/* Counter indicator */}
{isCountering && (
<mesh position={[0, 1.5, 0]}>
<torusGeometry args={[0.4, 0.05, 8, 32]} />
<meshBasicMaterial color={KOREAN_COLORS.ACCENT_PURPLE} />
</mesh>
)}
{/* Player name overlay */}
{showDetails && name && (
<Html
position={[0, 2.8, 0]}
center
distanceFactor={isMobile ? 15 : 10}
occlude={false}
style={{ pointerEvents: "none", userSelect: "none" }}
>
<div
style={{
fontFamily: FONT_FAMILY.KOREAN,
textAlign: "center",
color: "white",
textShadow: "0 0 4px rgba(0,0,0,0.8)",
}}
>
{/* Player name */}
<div
style={{
fontSize: isMobile ? "12px" : "14px",
fontWeight: "bold",
marginBottom: "4px",
}}
data-testid="player-name"
>
{name.korean}
</div>
{/* Trigram symbol */}
{showStanceIndicator && (
<div
style={{
fontSize: isMobile ? "14px" : "16px",
color: toHexColor(stanceColor),
}}
data-testid="trigram-symbol"
>
{trigramSymbol}
</div>
)}
{/* Combat state text */}
{(isBlocking || isStunned || isCountering) && (
<div
style={{
fontSize: isMobile ? "10px" : "12px",
fontWeight: "bold",
color: "#ffff00",
marginTop: "4px",
}}
data-testid="combat-state"
>
{isBlocking ? "방어" : isStunned ? "기절" : "반격"}
</div>
)}
</div>
</Html>
)}
{/* State indicators (health, stamina, Ki, balance) */}
{showDetails && (
<PlayerStateIndicators
health={health}
maxHealth={maxHealth}
stamina={stamina}
ki={ki}
balance={balance}
consciousness={consciousness}
pain={pain}
bloodLoss={bloodLoss}
isMobile={isMobile}
/>
)}
</group>{" "}
{/* Close inner sway group */}
</group>
);
};
export default SkeletalPlayer3D;
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