chore: add bounding frustum test

packages/math/tests/BoundingFrustum.test.ts

@@ -1,5 +1,37 @@
+import { BoundingBox } from "../src/BoundingBox";
 import { BoundingFrustum } from "../src/BoundingFrustum";
+import { BoundingSphere } from "../src/BoundingSphere";
+import { Matrix } from "../src/Matrix";
+import { Vector3 } from "../src/Vector3";
 
 describe("MathUtil test", () => {
-  it("construtor", () => {});
+  const viewMatrix = new Matrix(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, -20, 1);
+  const projectionMatrix = new Matrix(0.03954802080988884, 0, 0, 0, 0, 0.10000000149011612, 0, 0, 0, 0, -0.0200200192630291, 0, -0, -0, -1.0020020008087158, 1);
+  const vpMatrix = new Matrix();
+  Matrix.multiply(projectionMatrix, viewMatrix, vpMatrix);
+  const frustum = new BoundingFrustum(vpMatrix);
+
+  it("intersectsBox", () => {
+    const box1 = new BoundingBox(new Vector3(-2, -2, -2), new Vector3(2, 2, 2));
+    const flag1 = frustum.intersectsBox(box1);
+    expect(flag1).toEqual(true);
+
+    const box2 = new BoundingBox(new Vector3(-32, -2, -2), new Vector3(-28, 2, 2));
+    const flag2 = frustum.intersectsBox(box2);
+    expect(flag2).toEqual(false);
+  });
+
+  it("intersectsSphere", () => {
+    const box1 = new BoundingBox(new Vector3(-2, -2, -2), new Vector3(2, 2, 2));
+    const sphere1 = new BoundingSphere();
+    BoundingSphere.fromBox(box1, sphere1);
+    const flag1 = frustum.intersectsSphere(sphere1);
+    expect(flag1).toEqual(true);
+
+    const box2 = new BoundingBox(new Vector3(-32, -2, -2), new Vector3(-28, 2, 2));
+    const sphere2 = new BoundingSphere();
+    BoundingSphere.fromBox(box2, sphere2);
+    const flag2 = frustum.intersectsSphere(sphere2);
+    expect(flag2).toEqual(false);
+  });
 });