cocos-engine/tests/particle/gpu-culling.test.ts

import { director, Node, Scene, Vec3 } from "../../cocos/core";
import { legacyCC } from "../../cocos/core/global-exports";
import { ParticleSystem } from "../../exports/particle";

test('particle system gpu culling test', function () {
    const scene = new Scene('test');
    director.runSceneImmediate(scene);

    const temp0 = new Node();
    scene.addChild(temp0);

    const particle = temp0.addComponent(ParticleSystem) as ParticleSystem;

    particle.renderCulling = true;
    particle.loop = false;
    particle.playOnAwake = true;
    particle.renderer.useGPU = true;

    legacyCC.game.step();

    // @ts-expect-error
    expect(particle.aabbHalfX > 0 && particle.aabbHalfY > 0 && particle.aabbHalfZ > 0).toBeTruthy(); // ensure bounding box size > 0

    // @ts-expect-error
    expect(!particle._isSimulating).toBeTruthy(); // open culling, particle should be culled

    particle.renderCulling = false;

    legacyCC.game.step();

    // @ts-expect-error
    expect(particle._isSimulating).toBeTruthy(); // close culling, particle should continue simulating
});