| 1 | 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{ Nullable } from \"@babylonjs/core/types\";\nimport { Vector3 } from \"@babylonjs/core/Maths/math\";\nimport { Tools } from \"@babylonjs/core/Misc/tools\";\nimport { AnimationGroup } from \"@babylonjs/core/Animations/animationGroup\";\nimport { AnimationEvent } from \"@babylonjs/core/Animations/animationEvent\";\nimport { TransformNode } from \"@babylonjs/core/Meshes/transformNode\";\nimport { Sound } from \"@babylonjs/core/Audio/sound\";\nimport { WeightedSound } from \"@babylonjs/core/Audio/weightedsound\";\n\nimport { IArrayItem, IScene, INode, IAnimation } from \"../glTFLoaderInterfaces\";\nimport { IGLTFLoaderExtension } from \"../glTFLoaderExtension\";\nimport { GLTFLoader, ArrayItem } from \"../glTFLoader\";\nimport { IProperty } from 'babylonjs-gltf2interface';\n\nconst NAME = \"MSFT_audio_emitter\";\n\ninterface IClipReference {\n clip: number;\n weight?: number;\n}\n\ninterface IEmittersReference {\n emitters: number[];\n}\n\nconst enum DistanceModel {\n linear = \"linear\",\n inverse = \"inverse\",\n exponential = \"exponential\",\n}\n\ninterface IEmitter {\n name?: string;\n distanceModel?: DistanceModel;\n refDistance?: number;\n maxDistance?: number;\n rolloffFactor?: number;\n innerAngle?: number;\n outerAngle?: number;\n loop?: boolean;\n volume?: number;\n clips: IClipReference[];\n}\n\nconst enum AudioMimeType {\n WAV = \"audio/wav\",\n}\n\ninterface IClip extends IProperty {\n uri?: string;\n bufferView?: number;\n mimeType?: AudioMimeType;\n}\n\ninterface ILoaderClip extends IClip, IArrayItem {\n _objectURL?: Promise<string>;\n}\n\ninterface ILoaderEmitter extends IEmitter, IArrayItem {\n _babylonData?: {\n sound?: WeightedSound;\n loaded: Promise<void>;\n };\n _babylonSounds: Sound[];\n}\n\ninterface IMSFTAudioEmitter {\n clips: ILoaderClip[];\n emitters: ILoaderEmitter[];\n}\n\nconst enum AnimationEventAction {\n play = \"play\",\n pause = \"pause\",\n stop = \"stop\",\n}\n\ninterface IAnimationEvent {\n action: AnimationEventAction;\n emitter: number;\n time: number;\n startOffset?: number;\n}\n\ninterface ILoaderAnimationEvent extends IAnimationEvent, IArrayItem {\n}\n\ninterface ILoaderAnimationEvents {\n events: ILoaderAnimationEvent[];\n}\n\n/**\n * [Specification](https://github.com/najadojo/glTF/tree/MSFT_audio_emitter/extensions/2.0/Vendor/MSFT_audio_emitter)\n */\nexport class MSFT_audio_emitter implements IGLTFLoaderExtension {\n /** The name of this extension. */\n public readonly name = NAME;\n\n /** Defines whether this extension is enabled. */\n public enabled = true;\n\n private _loader: GLTFLoader;\n private _clips: Array<ILoaderClip>;\n private _emitters: Array<ILoaderEmitter>;\n\n /** @hidden */\n constructor(loader: GLTFLoader) {\n this._loader = loader;\n }\n\n /** @hidden */\n public dispose() {\n delete this._loader;\n delete this._clips;\n delete this._emitters;\n }\n\n /** @hidden */\n public onLoading(): void {\n const extensions = this._loader.gltf.extensions;\n if (extensions && extensions[this.name]) {\n const extension = extensions[this.name] as IMSFTAudioEmitter;\n\n this._clips = extension.clips;\n this._emitters = extension.emitters;\n\n ArrayItem.Assign(this._clips);\n ArrayItem.Assign(this._emitters);\n }\n }\n\n /** @hidden */\n public loadSceneAsync(context: string, scene: IScene): Nullable<Promise<void>> {\n return GLTFLoader.LoadExtensionAsync<IEmittersReference>(context, scene, this.name, (extensionContext, extension) => {\n const promises = new Array<Promise<any>>();\n\n promises.push(this._loader.loadSceneAsync(context, scene));\n\n for (const emitterIndex of extension.emitters) {\n const emitter = ArrayItem.Get(`${extensionContext}/emitters`, this._emitters, emitterIndex);\n if (emitter.refDistance != undefined || emitter.maxDistance != undefined || emitter.rolloffFactor != undefined ||\n emitter.distanceModel != undefined || emitter.innerAngle != undefined || emitter.outerAngle != undefined) {\n throw new Error(`${extensionContext}: Direction or Distance properties are not allowed on emitters attached to a scene`);\n }\n\n promises.push(this._loadEmitterAsync(`${extensionContext}/emitters/${emitter.index}`, emitter));\n }\n\n return Promise.all(promises).then(() => { });\n });\n }\n\n /** @hidden */\n public loadNodeAsync(context: string, node: INode, assign: (babylonTransformNode: TransformNode) => void): Nullable<Promise<TransformNode>> {\n return GLTFLoader.LoadExtensionAsync<IEmittersReference, TransformNode>(context, node, this.name, (extensionContext, extension) => {\n const promises = new Array<Promise<any>>();\n\n return this._loader.loadNodeAsync(extensionContext, node, (babylonMesh) => {\n for (const emitterIndex of extension.emitters) {\n const emitter = ArrayItem.Get(`${extensionContext}/emitters`, this._emitters, emitterIndex);\n promises.push(this._loadEmitterAsync(`${extensionContext}/emitters/${emitter.index}`, emitter).then(() => {\n for (const sound of emitter._babylonSounds) {\n sound.attachToMesh(babylonMesh);\n if (emitter.innerAngle != undefined || emitter.outerAngle != undefined) {\n sound.setLocalDirectionToMesh(Vector3.Forward());\n sound.setDirectionalCone(\n 2 * Tools.ToDegrees(emitter.innerAngle == undefined ? Math.PI : emitter.innerAngle),\n 2 * Tools.ToDegrees(emitter.outerAngle == undefined ? Math.PI : emitter.outerAngle),\n 0);\n }\n }\n }));\n }\n\n assign(babylonMesh);\n }).then((babylonMesh) => {\n return Promise.all(promises).then(() => {\n return babylonMesh;\n });\n });\n });\n }\n\n /** @hidden */\n public loadAnimationAsync(context: string, animation: IAnimation): Nullable<Promise<AnimationGroup>> {\n return GLTFLoader.LoadExtensionAsync<ILoaderAnimationEvents, AnimationGroup>(context, animation, this.name, (extensionContext, extension) => {\n return this._loader.loadAnimationAsync(context, animation).then((babylonAnimationGroup) => {\n const promises = new Array<Promise<any>>();\n\n ArrayItem.Assign(extension.events);\n for (const event of extension.events) {\n promises.push(this._loadAnimationEventAsync(`${extensionContext}/events/${event.index}`, context, animation, event, babylonAnimationGroup));\n }\n\n return Promise.all(promises).then(() => {\n return babylonAnimationGroup;\n });\n });\n });\n }\n\n private _loadClipAsync(context: string, clip: ILoaderClip): Promise<string> {\n if (clip._objectURL) {\n return clip._objectURL;\n }\n\n let promise: Promise<ArrayBufferView>;\n if (clip.uri) {\n promise = this._loader.loadUriAsync(context, clip, clip.uri);\n }\n else {\n const bufferView = ArrayItem.Get(`${context}/bufferView`, this._loader.gltf.bufferViews, clip.bufferView);\n promise = this._loader.loadBufferViewAsync(`#/bufferViews/${bufferView.index}`, bufferView);\n }\n\n clip._objectURL = promise.then((data) => {\n return URL.createObjectURL(new Blob([data], { type: clip.mimeType }));\n });\n\n return clip._objectURL;\n }\n\n private _loadEmitterAsync(context: string, emitter: ILoaderEmitter): Promise<void> {\n emitter._babylonSounds = emitter._babylonSounds || [];\n if (!emitter._babylonData) {\n const clipPromises = new Array<Promise<any>>();\n const name = emitter.name || `emitter${emitter.index}`;\n const options = {\n loop: false,\n autoplay: false,\n volume: emitter.volume == undefined ? 1 : emitter.volume,\n };\n\n for (let i = 0; i < emitter.clips.length; i++) {\n const clipContext = `#/extensions/${this.name}/clips`;\n const clip = ArrayItem.Get(clipContext, this._clips, emitter.clips[i].clip);\n clipPromises.push(this._loadClipAsync(`${clipContext}/${emitter.clips[i].clip}`, clip).then((objectURL: string) => {\n const sound = emitter._babylonSounds[i] = new Sound(name, objectURL, this._loader.babylonScene, null, options);\n sound.refDistance = emitter.refDistance || 1;\n sound.maxDistance = emitter.maxDistance || 256;\n sound.rolloffFactor = emitter.rolloffFactor || 1;\n sound.distanceModel = emitter.distanceModel || 'exponential';\n sound._positionInEmitterSpace = true;\n }));\n }\n\n const promise = Promise.all(clipPromises).then(() => {\n const weights = emitter.clips.map((clip) => { return clip.weight || 1; });\n const weightedSound = new WeightedSound(emitter.loop || false, emitter._babylonSounds, weights);\n if (emitter.innerAngle) { weightedSound.directionalConeInnerAngle = 2 * Tools.ToDegrees(emitter.innerAngle); }\n if (emitter.outerAngle) { weightedSound.directionalConeOuterAngle = 2 * Tools.ToDegrees(emitter.outerAngle); }\n if (emitter.volume) { weightedSound.volume = emitter.volume; }\n emitter._babylonData!.sound = weightedSound;\n });\n\n emitter._babylonData = {\n loaded: promise\n };\n }\n\n return emitter._babylonData.loaded;\n }\n\n private _getEventAction(context: string, sound: WeightedSound, action: AnimationEventAction, time: number, startOffset?: number): (currentFrame: number) => void {\n switch (action) {\n case AnimationEventAction.play: {\n return (currentFrame: number) => {\n const frameOffset = (startOffset || 0) + (currentFrame - time);\n sound.play(frameOffset);\n };\n }\n case AnimationEventAction.stop: {\n return (currentFrame: number) => {\n sound.stop();\n };\n }\n case AnimationEventAction.pause: {\n return (currentFrame: number) => {\n sound.pause();\n };\n }\n default: {\n throw new Error(`${context}: Unsupported action ${action}`);\n }\n }\n }\n\n private _loadAnimationEventAsync(context: string, animationContext: string, animation: IAnimation, event: ILoaderAnimationEvent, babylonAnimationGroup: AnimationGroup): Promise<void> {\n if (babylonAnimationGroup.targetedAnimations.length == 0) {\n return Promise.resolve();\n }\n const babylonAnimation = babylonAnimationGroup.targetedAnimations[0];\n const emitterIndex = event.emitter;\n const emitter = ArrayItem.Get(`#/extensions/${this.name}/emitters`, this._emitters, emitterIndex);\n return this._loadEmitterAsync(context, emitter).then(() => {\n const sound = emitter._babylonData!.sound;\n if (sound) {\n var babylonAnimationEvent = new AnimationEvent(event.time, this._getEventAction(context, sound, event.action, event.time, event.startOffset));\n babylonAnimation.animation.addEvent(babylonAnimationEvent);\n // Make sure all started audio stops when this animation is terminated.\n babylonAnimationGroup.onAnimationGroupEndObservable.add(() => {\n sound.stop();\n });\n babylonAnimationGroup.onAnimationGroupPauseObservable.add(() => {\n sound.pause();\n });\n }\n });\n }\n}\n\nGLTFLoader.RegisterExtension(NAME, (loader) => new MSFT_audio_emitter(loader));"]} |