VertexAnimation

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import { View3D, PlaneGeometry, Engine3D, Scene3D, AtmosphericComponent, CameraUtil, HoverCameraController, Object3D, DirectLight, KelvinUtil, MeshRenderer, LitMaterial, VertexAttributeName, Time } from '@orillusion/core'
import { Stats } from '@orillusion/stats'

// An sample of dynamically updating a geometry vertex attribute
class Smaple_VertexAnimation {
    // This geometry will dynamically update its vertex data over time
    floorGeometry: PlaneGeometry
    scene: Scene3D
    lightObj: Object3D
    async run() {
        await Engine3D.init({ beforeRender: () => this.update() })

        let view = new View3D()

        view.scene = new Scene3D()
        let sky = view.scene.addComponent(AtmosphericComponent)
        view.scene.addComponent(Stats)

        this.scene = view.scene

        view.camera = CameraUtil.createCamera3DObject(view.scene, 'camera')
        view.camera.perspective(60, Engine3D.aspect, 1, 2000)
        view.camera.object3D.addComponent(HoverCameraController).setCamera(35, -20, 150)

        Engine3D.startRenderView(view)

        this.createScene()
        sky.relativeTransform = this.lightObj.transform
    }

    private createScene() {
        // add light
        let lightObj3D = (this.lightObj = new Object3D())
        let directLight = lightObj3D.addComponent(DirectLight)
        directLight.intensity = 25
        directLight.lightColor = KelvinUtil.color_temperature_to_rgb(5355)
        directLight.castShadow = true
        lightObj3D.rotationX = 53.2
        lightObj3D.rotationY = 220
        lightObj3D.rotationZ = 5.58
        this.scene.addChild(lightObj3D)

        // add floor
        this.floorGeometry = new PlaneGeometry(100, 100, 199, 199)

        let floor = new Object3D()
        let renderer = floor.addComponent(MeshRenderer)
        renderer.geometry = this.floorGeometry
        renderer.material = new LitMaterial()
        renderer.castShadow = true
        renderer.receiveShadow = true
        this.scene.addChild(floor)
    }

    private update() {
        if (this.floorGeometry) {
            let posAttrData = this.floorGeometry.getAttribute(VertexAttributeName.position)

            // update its vertex data over time
            let timeOffset = Time.time
            for (let i = 0, count = posAttrData.data.length / 3; i < count; i++) {
                posAttrData.data[i * 3 + 1] = Math.sin(timeOffset * 0.01 + i * 0.25)
            }
            // position attr need to be upload
            this.floorGeometry.vertexBuffer.upload(VertexAttributeName.position, posAttrData)

            //update normals
            this.floorGeometry.computeNormals()
        }
    }
}

new Smaple_VertexAnimation().run()