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* Three.js Object Pool for Animation Performance
*
* Specialized object pooling for frequently created Three.js objects
* to reduce garbage collection pressure during animation updates.
*
* Target: Reduce ~1,344 object allocations per frame to near-zero.
*
* @module utils/threeObjectPool
* @category Performance
* @korean Three.js객체풀
*/
import * as THREE from "three";
/**
* Pool for THREE.Euler objects used in bone rotations
*
* Reduces GC pressure from creating new Euler objects every frame.
* Prewarmed with 200 objects (2 characters × 28 bones × 3.5 keyframes avg)
*
* @korean 오일러풀
*/
class EulerPool {
private pool: THREE.Euler[] = [];
private readonly maxSize: number;
constructor(maxSize = 500) {
this.maxSize = maxSize;
}
/**
* Acquire an Euler object from the pool
* @returns Pooled or new Euler object (reset to 0,0,0)
*/
acquire(): THREE.Euler {
const euler = this.pool.pop();
if (euler) {
euler.set(0, 0, 0);
return euler;
}
return new THREE.Euler(0, 0, 0);
}
/**
* Return an Euler object to the pool
* @param euler - Euler object to return
*/
release(euler: THREE.Euler): void {
Eif (this.pool.length < this.maxSize) {
this.pool.push(euler);
}
}
/**
* Pre-populate pool with objects
* @param count - Number of objects to create
*/
prewarm(count: number): void {
const toCreate = Math.min(count, this.maxSize - this.pool.length);
for (let i = 0; i < toCreate; i++) {
this.pool.push(new THREE.Euler(0, 0, 0));
}
}
/**
* Get current pool size
*/
get size(): number {
return this.pool.length;
}
/**
* Clear all pooled objects
*/
clear(): void {
this.pool = [];
}
}
/**
* Pool for THREE.Vector3 objects used in bone positions
*
* Reduces GC pressure from creating new Vector3 objects every frame.
* Prewarmed with 200 objects (2 characters × 28 bones × 3.5 keyframes avg)
*
* @korean 벡터3풀
*/
class Vector3Pool {
private pool: THREE.Vector3[] = [];
private readonly maxSize: number;
constructor(maxSize = 500) {
this.maxSize = maxSize;
}
/**
* Acquire a Vector3 object from the pool
* @returns Pooled or new Vector3 object (reset to 0,0,0)
*/
acquire(): THREE.Vector3 {
const vector = this.pool.pop();
if (vector) {
vector.set(0, 0, 0);
return vector;
}
return new THREE.Vector3(0, 0, 0);
}
/**
* Return a Vector3 object to the pool
* @param vector - Vector3 object to return
*/
release(vector: THREE.Vector3): void {
Eif (this.pool.length < this.maxSize) {
this.pool.push(vector);
}
}
/**
* Pre-populate pool with objects
* @param count - Number of objects to create
*/
prewarm(count: number): void {
const toCreate = Math.min(count, this.maxSize - this.pool.length);
for (let i = 0; i < toCreate; i++) {
this.pool.push(new THREE.Vector3(0, 0, 0));
}
}
/**
* Get current pool size
*/
get size(): number {
return this.pool.length;
}
/**
* Clear all pooled objects
*/
clear(): void {
this.pool = [];
}
}
/**
* Pool for THREE.Matrix4 objects used in bone transformations
*
* Reduces GC pressure from creating new Matrix4 objects during calculations.
* Prewarmed with 100 objects (2 characters × 28 bones × 2 temp matrices)
*
* @korean 행렬4풀
*/
class Matrix4Pool {
private pool: THREE.Matrix4[] = [];
private readonly maxSize: number;
constructor(maxSize = 200) {
this.maxSize = maxSize;
}
/**
* Acquire a Matrix4 object from the pool
* @returns Pooled or new Matrix4 object (reset to identity)
*/
acquire(): THREE.Matrix4 {
const matrix = this.pool.pop();
if (matrix) {
matrix.identity();
return matrix;
}
return new THREE.Matrix4();
}
/**
* Return a Matrix4 object to the pool
* @param matrix - Matrix4 object to return
*/
release(matrix: THREE.Matrix4): void {
Eif (this.pool.length < this.maxSize) {
this.pool.push(matrix);
}
}
/**
* Pre-populate pool with objects
* @param count - Number of objects to create
*/
prewarm(count: number): void {
const toCreate = Math.min(count, this.maxSize - this.pool.length);
for (let i = 0; i < toCreate; i++) {
this.pool.push(new THREE.Matrix4());
}
}
/**
* Get current pool size
*/
get size(): number {
return this.pool.length;
}
/**
* Clear all pooled objects
*/
clear(): void {
this.pool = [];
}
}
/**
* Pool for THREE.Quaternion objects used in rotations
*
* Reduces GC pressure from quaternion operations.
* Prewarmed with 100 objects (2 characters × 28 bones × 2 temp quaternions)
*
* @korean 쿼터니언풀
*/
class QuaternionPool {
private pool: THREE.Quaternion[] = [];
private readonly maxSize: number;
constructor(maxSize = 200) {
this.maxSize = maxSize;
}
/**
* Acquire a Quaternion object from the pool
* @returns Pooled or new Quaternion object (reset to identity)
*/
acquire(): THREE.Quaternion {
const quat = this.pool.pop();
if (quat) {
quat.set(0, 0, 0, 1);
return quat;
}
return new THREE.Quaternion(0, 0, 0, 1);
}
/**
* Return a Quaternion object to the pool
* @param quat - Quaternion object to return
*/
release(quat: THREE.Quaternion): void {
Eif (this.pool.length < this.maxSize) {
this.pool.push(quat);
}
}
/**
* Pre-populate pool with objects
* @param count - Number of objects to create
*/
prewarm(count: number): void {
const toCreate = Math.min(count, this.maxSize - this.pool.length);
for (let i = 0; i < toCreate; i++) {
this.pool.push(new THREE.Quaternion(0, 0, 0, 1));
}
}
/**
* Get current pool size
*/
get size(): number {
return this.pool.length;
}
/**
* Clear all pooled objects
*/
clear(): void {
this.pool = [];
}
}
/**
* Global Three.js object pools
*
* Singleton pools for animation system to reduce GC pressure.
* Prewarmed during app initialization for optimal performance.
*
* @example
* ```typescript
* // Acquire temporary Euler for calculation
* const tempEuler = ThreeObjectPools.euler.acquire();
* tempEuler.set(x, y, z);
* // ... use tempEuler ...
* ThreeObjectPools.euler.release(tempEuler);
*
* // Prewarm pools on app start
* ThreeObjectPools.prewarmAll();
* ```
*
* @korean Three.js객체풀들
*/
export const ThreeObjectPools = {
/** Euler rotation pool */
euler: new EulerPool(500),
/** Vector3 position pool */
vector3: new Vector3Pool(500),
/** Matrix4 transformation pool */
matrix4: new Matrix4Pool(200),
/** Quaternion rotation pool */
quaternion: new QuaternionPool(200),
/**
* Pre-populate all pools with recommended sizes
*
* Call this during app initialization for optimal performance.
* Recommended sizes based on 2 characters with 28 bones each:
* - Euler: 200 objects
* - Vector3: 200 objects
* - Matrix4: 100 objects
* - Quaternion: 100 objects
*/
prewarmAll(): void {
this.euler.prewarm(200);
this.vector3.prewarm(200);
this.matrix4.prewarm(100);
this.quaternion.prewarm(100);
},
/**
* Get current status of all pools
* @returns Pool status for monitoring
*/
getStatus(): {
euler: number;
vector3: number;
matrix4: number;
quaternion: number;
} {
return {
euler: this.euler.size,
vector3: this.vector3.size,
matrix4: this.matrix4.size,
quaternion: this.quaternion.size,
};
},
/**
* Clear all pools (useful for testing)
*/
clearAll(): void {
this.euler.clear();
this.vector3.clear();
this.matrix4.clear();
this.quaternion.clear();
},
} as const;
/**
* Helper to execute a function with temporary Euler objects
* Automatically acquires and releases Euler objects.
*
* @param count - Number of Euler objects needed
* @param fn - Function that uses the Euler objects
* @returns Result of the function
*
* @example
* ```typescript
* const result = withTempEulers(2, ([euler1, euler2]) => {
* euler1.set(x1, y1, z1);
* euler2.set(x2, y2, z2);
* return calculateSomething(euler1, euler2);
* });
* ```
*
* @korean 임시오일러사용
*/
export function withTempEulers<T>(
count: number,
fn: (eulers: THREE.Euler[]) => T
): T {
const eulers: THREE.Euler[] = [];
try {
for (let i = 0; i < count; i++) {
eulers.push(ThreeObjectPools.euler.acquire());
}
return fn(eulers);
} finally {
eulers.forEach((euler) => ThreeObjectPools.euler.release(euler));
}
}
/**
* Helper to execute a function with temporary Vector3 objects
* Automatically acquires and releases Vector3 objects.
*
* @param count - Number of Vector3 objects needed
* @param fn - Function that uses the Vector3 objects
* @returns Result of the function
*
* @korean 임시벡터3사용
*/
export function withTempVectors<T>(
count: number,
fn: (vectors: THREE.Vector3[]) => T
): T {
const vectors: THREE.Vector3[] = [];
try {
for (let i = 0; i < count; i++) {
vectors.push(ThreeObjectPools.vector3.acquire());
}
return fn(vectors);
} finally {
vectors.forEach((vector) => ThreeObjectPools.vector3.release(vector));
}
}
/**
* Helper to execute a function with temporary Matrix4 objects
* Automatically acquires and releases Matrix4 objects.
*
* @param count - Number of Matrix4 objects needed
* @param fn - Function that uses the Matrix4 objects
* @returns Result of the function
*
* @korean 임시행렬4사용
*/
export function withTempMatrices<T>(
count: number,
fn: (matrices: THREE.Matrix4[]) => T
): T {
const matrices: THREE.Matrix4[] = [];
try {
for (let i = 0; i < count; i++) {
matrices.push(ThreeObjectPools.matrix4.acquire());
}
return fn(matrices);
} finally {
matrices.forEach((matrix) => ThreeObjectPools.matrix4.release(matrix));
}
}
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