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* TraumaOverlay3D - Bruising and injury visualization system
*
* Renders progressive bruising, cuts, and bone fracture indicators on 3D character models
* using shader-based texture overlays with color blending. Bruises darken with repeated
* hits to the same body region and persist across combat rounds.
*
* Features:
* - Progressive bruising (purple/black gradients)
* - Cut/laceration marks for sharp strikes
* - Bone fracture indicators at <30% health
* - Injury persistence across rounds
* - Korean-themed injury visualization
*
* @module components/combat/TraumaOverlay3D
* @category Combat Effects
* @korean 외상오버레이3D
*/
import { Html } from "@react-three/drei";
import React, { useMemo } from "react";
import * as THREE from "three";
import { KOREAN_COLORS } from "../../../../../types/constants";
import { BodyRegion } from "../../../../../types/common";
/**
* Injury type classification
*/
export enum InjuryType {
BRUISE = "bruise", // Blunt force trauma
CUT = "cut", // Sharp weapon/strike
LACERATION = "laceration", // Deep cut with blood trail
FRACTURE = "fracture", // Bone damage indicator
}
/**
* Individual injury data
*/
export interface Injury {
/** Unique identifier */
readonly id: string;
/** Body region affected */
readonly region: BodyRegion;
/** Type of injury */
readonly type: InjuryType;
/** Position on body [x, y, z] relative to character center */
readonly position: [number, number, number];
/** Severity (0.0 to 1.0) */
readonly severity: number;
/** Number of hits to same location (for progressive bruising) */
readonly hitCount: number;
/** Timestamp when injury was created */
readonly timestamp: number;
/** Optional player ID for multi-player scenarios */
readonly playerId?: string | number;
}
/**
* Props for TraumaOverlay3D component
*/
export interface TraumaOverlay3DProps {
/** Character ID for injury tracking */
readonly playerId: string;
/** Current health (0-100) */
readonly health: number;
/** Active injuries to visualize */
readonly injuries: readonly Injury[];
/** Character position in world space */
readonly characterPosition: [number, number, number];
/** Whether character is mobile (simplified visualization) */
readonly isMobile?: boolean;
/** Whether to show fracture indicators */
readonly showFractures?: boolean;
}
/**
* Color constants for injury visualization
*/
const INJURY_COLORS = {
BRUISE_FRESH: 0x8B0000, // Dark red (fresh bruise)
BRUISE_OLD: 0x4B0082, // Indigo (aging bruise)
BRUISE_SEVERE: 0x000000, // Black (severe bruising)
CUT_COLOR: 0xFF0000, // Bright red (cut)
FRACTURE_INDICATOR: KOREAN_COLORS.ACCENT_GOLD, // Gold (bone fracture)
} as const;
/**
* Get bruise color based on severity and hit count
*/
const getBruiseColor = (severity: number, hitCount: number): number => {
if (hitCount >= 3 || severity > 0.8) {
return INJURY_COLORS.BRUISE_SEVERE; // Black for severe/repeated trauma
} else if (hitCount >= 2 || severity > 0.5) {
return INJURY_COLORS.BRUISE_OLD; // Indigo for moderate bruising
} else {
return INJURY_COLORS.BRUISE_FRESH; // Dark red for fresh bruise
}
};
/**
* Get injury size based on severity
*/
const getInjurySize = (severity: number): number => {
return 0.1 + severity * 0.3; // 0.1 to 0.4 units
};
/**
* InjuryMarker - Individual injury visualization
*/
const InjuryMarker: React.FC<{
injury: Injury;
characterPosition: [number, number, number];
isMobile: boolean;
}> = ({ injury, characterPosition, isMobile }) => {
// Calculate world position relative to character
const worldPosition: [number, number, number] = useMemo(() => {
return [
characterPosition[0] + injury.position[0],
characterPosition[1] + injury.position[1],
characterPosition[2] + injury.position[2],
];
}, [characterPosition, injury.position]);
const size = useMemo(() => getInjurySize(injury.severity), [injury.severity]);
// Render based on injury type
switch (injury.type) {
case InjuryType.BRUISE: {
const color = getBruiseColor(injury.severity, injury.hitCount);
const opacity = Math.min(0.8, 0.3 + injury.severity * 0.5);
return (
<mesh position={worldPosition} data-testid={`injury-${injury.id}`}>
<sphereGeometry args={[size, isMobile ? 8 : 16, isMobile ? 8 : 16]} />
<meshBasicMaterial
color={color}
transparent
opacity={opacity}
depthTest={true}
/>
</mesh>
);
}
case InjuryType.CUT:
case InjuryType.LACERATION: {
const cutLength = injury.type === InjuryType.LACERATION ? size * 3 : size * 2;
return (
<group position={worldPosition} data-testid={`injury-${injury.id}`}>
{/* Cut mark - thin red line */}
<mesh>
<boxGeometry args={[cutLength, 0.02, 0.02]} />
<meshBasicMaterial
color={INJURY_COLORS.CUT_COLOR}
transparent
opacity={0.9}
/>
</mesh>
{/* Blood trail for lacerations */}
{injury.type === InjuryType.LACERATION && (
<mesh position={[0, -size * 0.5, 0]}>
<boxGeometry args={[0.02, size, 0.02]} />
<meshBasicMaterial
color={KOREAN_COLORS.BLOODLOSS_INDICATOR}
transparent
opacity={0.7}
/>
</mesh>
)}
</group>
);
}
case InjuryType.FRACTURE: {
return (
<group position={worldPosition} data-testid={`injury-${injury.id}`}>
{/* Fracture indicator - pulsing gold ring */}
<mesh rotation={[-Math.PI / 2, 0, 0]}>
<ringGeometry args={[size * 0.8, size, 16]} />
<meshBasicMaterial
color={INJURY_COLORS.FRACTURE_INDICATOR}
transparent
opacity={0.6}
side={THREE.DoubleSide}
/>
</mesh>
{/* Cross indicator */}
<mesh>
<boxGeometry args={[size * 2, 0.02, 0.02]} />
<meshBasicMaterial
color={INJURY_COLORS.FRACTURE_INDICATOR}
transparent
opacity={0.8}
/>
</mesh>
<mesh rotation={[0, 0, Math.PI / 2]}>
<boxGeometry args={[size * 2, 0.02, 0.02]} />
<meshBasicMaterial
color={INJURY_COLORS.FRACTURE_INDICATOR}
transparent
opacity={0.8}
/>
</mesh>
</group>
);
}
default:
return null;
}
};
/**
* FractureWarning - Html overlay warning for critical bone damage
*/
const FractureWarning: React.FC<{
health: number;
isMobile: boolean;
}> = ({ health, isMobile }) => {
// Calculate opacity before early return to avoid conditional hook call
const warningOpacity = useMemo(() => {
// Pulse more intensely as health drops
const rawOpacity = 0.5 + (30 - health) / 60; // 0.5 at 30% health, 1.0 at 0% health
// Clamp to valid CSS opacity range [0, 1] in case health falls outside [0, 30]
return Math.min(1, Math.max(0, rawOpacity));
}, [health]);
if (health >= 30) return null;
return (
<Html center position={[0, 2.5, 0]}>
<div
style={{
padding: isMobile ? "8px 12px" : "10px 16px",
backgroundColor: `rgba(255, 200, 0, ${warningOpacity * 0.3})`,
border: `2px solid #FFD700`,
borderRadius: "6px",
fontSize: isMobile ? "12px" : "14px",
color: "#FFD700",
fontWeight: "bold",
textShadow: "0 0 4px rgba(0,0,0,0.8)",
animation: "fracturePulse 1s ease-in-out infinite",
}}
data-testid="fracture-warning"
>
⚠️ 골절위험 | Bone Fracture Risk
</div>
<style>
{`
@keyframes fracturePulse {
0%, 100% { opacity: 0.7; transform: scale(1); }
50% { opacity: 1; transform: scale(1.05); }
}
`}
</style>
</Html>
);
};
/**
* TraumaOverlay3D Component
*
* Visualizes progressive combat trauma including bruising, cuts, and bone damage
* on 3D character models. Injuries persist across rounds and darken with repeated
* hits to the same body region.
*
* @example
* ```tsx
* const [injuries, setInjuries] = useState<Injury[]>([]);
*
* // On hit event
* const handleHit = (region: BodyRegion, position: [number, number, number], type: InjuryType) => {
* const existingInjury = injuries.find(i =>
* i.region === region &&
* distance(i.position, position) < 0.2
* );
*
* if (existingInjury) {
* // Progressive bruising - increase hit count
* setInjuries(prev => prev.map(i =>
* i.id === existingInjury.id
* ? { ...i, hitCount: i.hitCount + 1, severity: Math.min(1.0, i.severity + 0.2) }
* : i
* ));
* } else {
* // New injury
* setInjuries([...injuries, {
* id: generateId(),
* region,
* type,
* position,
* severity: 0.5,
* hitCount: 1,
* timestamp: Date.now(),
* }]);
* }
* };
*
* <TraumaOverlay3D
* playerId={playerId}
* health={playerHealth}
* injuries={injuries}
* characterPosition={characterPosition}
* isMobile={isMobile}
* showFractures={true}
* />
* ```
*/
export const TraumaOverlay3D: React.FC<TraumaOverlay3DProps> = ({
playerId,
health,
injuries,
characterPosition,
isMobile = false,
showFractures = true,
}) => {
// Filter injuries for this player
const playerInjuries = useMemo(() => {
// In multi-player scenarios, filter by player when available
if (playerId === null || playerId === undefined) {
// Single-player or unspecified player: show all injuries
return injuries;
}
// Backward-compatible filtering:
// - If an injury has a playerId, it must match the current playerId.
// - If an injury has no playerId, include it (legacy/global injuries).
return injuries.filter((injury) => {
if (injury.playerId === null || injury.playerId === undefined) {
return true;
}
return injury.playerId === playerId;
});
}, [injuries, playerId]);
// Separate fractures from other injuries
const { fractures, otherInjuries } = useMemo(() => {
const frac = playerInjuries.filter((i) => i.type === InjuryType.FRACTURE);
const other = playerInjuries.filter((i) => i.type !== InjuryType.FRACTURE);
return { fractures: frac, otherInjuries: other };
}, [playerInjuries]);
return (
<group data-testid={`trauma-overlay-${playerId}`}>
{/* Render non-fracture injuries */}
{otherInjuries.map((injury) => (
<InjuryMarker
key={injury.id}
injury={injury}
characterPosition={characterPosition}
isMobile={isMobile}
/>
))}
{/* Render fractures if enabled and health is critical */}
{showFractures &&
health < 30 &&
fractures.map((injury) => (
<InjuryMarker
key={injury.id}
injury={injury}
characterPosition={characterPosition}
isMobile={isMobile}
/>
))}
{/* Fracture warning overlay */}
{showFractures && health < 30 && fractures.length > 0 && (
<FractureWarning health={health} isMobile={isMobile} />
)}
</group>
);
};
export default TraumaOverlay3D;
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