// 对俯仰角度进行设置
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export function setPitchAngle(pitch) {
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let pitchment = Number(pitch) || 0
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let result = ''
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if (pitchment == 0) {
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result = '正前'
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} else if (pitchment > -90 && pitchment < 0) {
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result = '斜下'
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} else if (pitchment == -90) {
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result = '正下'
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} else if (pitchment > 0 && pitchment < 90) {
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result = '斜上'
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} else if (pitchment == 90) {
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result = '正上'
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}
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return result
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}
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// 对云台偏航角度进行设置
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export function setYawAngle(Yaw) {
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let adjustment = Number(Yaw) || 0
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let result = ''
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if (adjustment > 0 && adjustment <= 45) {
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result = '北偏东'
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} else if (adjustment > 45 && adjustment < 90) {
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result = '东偏北'
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} else if (adjustment == 90) {
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result = '正东'
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} else if (adjustment > 90 && adjustment <= 135) {
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result = '东偏南'
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} else if (adjustment > 135 && adjustment < 180) {
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result = '南偏东'
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} else if (adjustment == 180) {
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result = '正南'
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} else if (adjustment < 0 && adjustment >= -45) {
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result = '北偏西'
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} else if (adjustment < -45 && adjustment > -90) {
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result = '西偏北'
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} else if (adjustment == -90) {
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result = '正西'
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} else if (adjustment < -90 && adjustment >= -135) {
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result = '西偏南'
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} else if (adjustment < -135 && adjustment > -180) {
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result = '南偏西'
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} else {
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result = '正北'
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}
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return result
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}
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// 文件格式后缀获取
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export function getFileType(ext) {
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// 获取类型结果
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let result = ''
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// fileName无后缀返回 false
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if (!ext) {
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return -1
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}
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ext = ext.toLocaleLowerCase()
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// 图片格式
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const imglist = ['png', 'jpg', 'jpeg', 'bmp', 'gif']
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// 进行图片匹配
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result = imglist.find(item => item === ext)
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if (result) {
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return 'image'
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}
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// 匹配txt
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const txtlist = ['txt']
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result = txtlist.find(item => item === ext)
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if (result) {
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return 'txt'
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}
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// 匹配 excel
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const excelist = ['xls', 'xlsx']
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result = excelist.find(item => item === ext)
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if (result) {
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return 'excel'
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}
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// 匹配 word
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const wordlist = ['doc', 'docx']
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result = wordlist.find(item => item === ext)
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if (result) {
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return 'word'
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}
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// 匹配 pdf
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const pdflist = ['pdf']
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result = pdflist.find(item => item === ext)
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if (result) {
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return 'pdf'
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}
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// 匹配 ppt
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const pptlist = ['ppt', 'pptx']
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result = pptlist.find(item => item === ext)
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if (result) {
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return 'ppt'
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}
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// 匹配 视频
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const videolist = ['mp4', 'm2v', 'mkv', 'rmvb', 'wmv', 'avi', 'flv', 'mov', 'm4v', 'ogv']
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result = videolist.find(item => item === ext)
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if (result) {
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return 'video'
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}
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// 匹配 音频
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const radiolist = ['mp3', 'wav', 'wmv']
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result = radiolist.find(item => item === ext)
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if (result) {
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return 'radio'
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}
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// 其他 文件类型
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return 'other'
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}
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// 获取视频首帧
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export function getVideoFirstCover(url) {
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return new Promise(resolve => {
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const video = document.createElement('video')
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video.src = url
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video.muted = true
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video.setAttribute('crossorigin', 'anonymous')
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video.addEventListener('loadedmetadata', function () {
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const canvas = document.createElement('canvas')
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canvas.width = video.videoWidth
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canvas.height = video.videoHeight
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const context = canvas.getContext('2d')
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context.drawImage(video, 0, 0, canvas.width, canvas.height)
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// 输出首帧图像
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const firstFrameDataUrl = canvas.toDataURL('image/png')
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resolve(firstFrameDataUrl)
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})
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})
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}
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