数学库新增Vector3

packages/math/src/index.ts

@@ -10,6 +10,7 @@
 
 // 核心数学类
 export { Vector2 } from './Vector2';
+export { Vector3 } from './Vector3';
 export { Matrix3 } from './Matrix3';
 export { Rectangle } from './Rectangle';
 export { Circle } from './Circle';