Terrain

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import { Engine3D, View3D, Scene3D, CameraUtil, AtmosphericComponent, webGPUContext, HoverCameraController, Object3D, DirectLight, KelvinUtil, LitMaterial, MeshRenderer, PostProcessingComponent, BitmapTexture2D, GlobalFog, Color } from '@orillusion/core';
import { TerrainGeometry } from '@orillusion/effect'
import { Stats } from '@orillusion/stats'


// An sample of custom vertex attribute of geometry
class Sample_Terrain {
    view: View3D
    post: PostProcessingComponent

    async run() {
        Engine3D.setting.shadow.autoUpdate = true
        Engine3D.setting.shadow.updateFrameRate = 1
        Engine3D.setting.shadow.shadowBound = 500
        Engine3D.setting.shadow.shadowSize = 2048

        await Engine3D.init()
        this.view = new View3D()
        this.view.scene = new Scene3D()
        this.view.scene.addComponent(AtmosphericComponent)
        this.view.scene.addComponent(Stats)

        this.view.camera = CameraUtil.createCamera3DObject(this.view.scene)
        this.view.camera.perspective(60, webGPUContext.aspect, 1, 50000.0)
        this.view.camera.object3D.z = -15
        this.view.camera.object3D.addComponent(HoverCameraController).setCamera(35, -20, 10000)

        Engine3D.startRenderView(this.view)

        this.post = this.view.scene.addComponent(PostProcessingComponent)
        let fog = this.post.addPost(GlobalFog)
        fog.start = 2000
        fog.end = 0
        fog.fogHeightScale = 0.116
        fog.density = 0.094
        fog.ins = 0.1041
        fog.skyFactor = 0.35
        fog.overrideSkyFactor = 0.7

        fog.fogColor = new Color(136 / 255, 215 / 255, 236 / 255, 1)
        fog.fogHeightScale = 0.1
        fog.falloff = 0.626
        fog.scatteringExponent = 8
        fog.dirHeightLine = 6.5

        this.createScene(this.view.scene)
    }

    private async createScene(scene: Scene3D) {
        {
            let sunObj = new Object3D()
            let sunLight = sunObj.addComponent(DirectLight)
            sunLight.lightColor = KelvinUtil.color_temperature_to_rgb(6553)
            sunLight.castShadow = true
            sunLight.intensity = 49
            sunObj.transform.rotationX = 50
            sunObj.transform.rotationY = 50
            scene.addChild(sunObj)
        }

        //bitmap
        let bitmapTexture = await Engine3D.res.loadTexture('https://cdn.orillusion.com/terrain/test01/bitmap.png')
        let heightTexture = await Engine3D.res.loadTexture('https://cdn.orillusion.com/terrain/test01/height.png')
        let terrainSizeW = 20488
        let terrainSizeH = 20488
        let terrainGeometry: TerrainGeometry
        {
            let mat = new LitMaterial()
            terrainGeometry = new TerrainGeometry(terrainSizeW, terrainSizeH, 2000, 2000)
            terrainGeometry.setHeight(heightTexture as BitmapTexture2D, 5000)
            let floor = new Object3D()
            let mr = floor.addComponent(MeshRenderer)
            mr.geometry = terrainGeometry
            mat.baseMap = bitmapTexture
            mr.material = mat
            scene.addChild(floor)
        }
    }
}

new Sample_Terrain().run()