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72 changes: 72 additions & 0 deletions
72
packages/model-viewer/src/three-components/GroundedSkybox.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| /* @license | ||
| * Copyright 2023 Google LLC. All Rights Reserved. | ||
| * Licensed under the Apache License, Version 2.0 (the 'License'); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an 'AS IS' BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
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| import {BackSide, BufferAttribute, Mesh, MeshBasicMaterial, SphereGeometry, Texture, Vector3} from 'three'; | ||
|
|
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| export class GroundedSkybox extends Mesh { | ||
| private height = 0; | ||
| private radius = 0; | ||
| private resolution = 0; | ||
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| constructor() { | ||
| super(undefined, new MeshBasicMaterial({side: BackSide})); | ||
| this.userData.noHit = true; | ||
| } | ||
|
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| get map() { | ||
| return (this.material as MeshBasicMaterial).map; | ||
| } | ||
|
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| set map(skybox: Texture|null) { | ||
| (this.material as MeshBasicMaterial).map = skybox; | ||
| } | ||
|
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| getHeight() { | ||
| return this.height; | ||
| } | ||
|
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| updateGeometry(height = this.height, radius = this.radius, resolution = 128) { | ||
| if (height != this.height || radius != this.radius || | ||
| resolution != this.resolution) { | ||
| this.height = height; | ||
| this.radius = radius; | ||
| this.resolution = resolution; | ||
| if (height > 0 && radius > 0) { | ||
| this.geometry = makeGeometry(height, radius, resolution); | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
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| function makeGeometry(height: number, radius: number, resolution: number) { | ||
| const geometry = new SphereGeometry(radius, 2 * resolution, resolution); | ||
|
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| const pos = geometry.getAttribute('position') as BufferAttribute; | ||
| const tmp = new Vector3(); | ||
| for (let i = 0; i < pos.count; ++i) { | ||
| tmp.fromBufferAttribute(pos, i); | ||
| if (tmp.y < 0) { | ||
| // Smooth out the transition from flat floor to sphere: | ||
| const y1 = -height * 3 / 2; | ||
| const f = | ||
| tmp.y < y1 ? -height / tmp.y : (1 - tmp.y * tmp.y / (3 * y1 * y1)); | ||
| tmp.multiplyScalar(f); | ||
| tmp.toArray(pos.array, 3 * i); | ||
| } | ||
| } | ||
| pos.needsUpdate = true; | ||
|
|
||
| return geometry; | ||
| } |
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packages/shared-assets/environments/whipple_creek_regional_park_04_1k.jpg
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