70 lines
1.5 KiB
Vue
70 lines
1.5 KiB
Vue
<template>
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<audio ref="audio"
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:src="definition.src"
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loop preload="auto"/>
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</template>
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<script lang="ts">
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import {defineComponent, ref, watch} from "vue";
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export default defineComponent({
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name: "AudioArea",
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props: {
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definition: {
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type: Object,
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required: true
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},
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bbox: {
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type: Object,
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required: true
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},
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},
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setup(props) {
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const audio = ref<HTMLAudioElement | null>(null);
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const MIN_SCALE = 0.02;
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const MIN_VOLUME_MULTIPLIER = 0.33;
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const vol_x = (1 - MIN_VOLUME_MULTIPLIER) / (1 - MIN_SCALE);
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const vol_b = 1 - vol_x;
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const onBBoxChange = () => {
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const x = props.bbox.x + props.bbox.w / 2;
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const y = props.bbox.y + props.bbox.h / 2;
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const distance = Math.sqrt(Math.pow(x - props.definition.cx, 2) + Math.pow(y - props.definition.cy, 2));
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if (distance < props.definition.radius) {
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audio.value!.play();
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const volume = (props.definition.radius - distance) / props.definition.radius;
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audio.value!.volume = volume * (props.bbox.z < 1 ? (props.bbox.z * vol_x + vol_b) : 1);
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} else {
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audio.value!.pause();
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}
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};
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watch(props.bbox, onBBoxChange, {deep: true});
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return {
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audio
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};
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}
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});
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export interface AudioAreaDef {
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cx: number,
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cy: number,
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radius: number,
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src: string
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}
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export interface BoundingBox {
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x: number,
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y: number,
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w: number,
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h: number
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}
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</script>
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<!-- Add "scoped" attribute to limit CSS to this component only -->
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<style scoped>
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</style>
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