[PhotonClient] Vite and Typescript complete refactor (#884)

This commit is contained in:
Sriman Achanta
2023-08-21 01:51:35 -04:00
committed by GitHub
parent 8397b43bef
commit f623e4a1cc
119 changed files with 11821 additions and 19318 deletions

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<script setup lang="ts">
import { computed, ref } from "vue";
import { useCameraSettingsStore } from "@/stores/settings/CameraSettingsStore";
import { CalibrationBoardTypes, type VideoFormat, type Resolution } from "@/types/SettingTypes";
import JsPDF from "jspdf";
import { font as PromptRegular } from "@/assets/fonts/PromptRegular";
import MonoLogo from "@/assets/images/logoMono.png";
import CvSlider from "@/components/common/cv-slider.vue";
import { useStateStore } from "@/stores/StateStore";
import CvSwitch from "@/components/common/cv-switch.vue";
import CvSelect from "@/components/common/cv-select.vue";
import CvNumberInput from "@/components/common/cv-number-input.vue";
import { WebsocketPipelineType } from "@/types/WebsocketDataTypes";
const settingsValid = ref(true);
const getCalibrationCoeffs = (resolution: Resolution) => {
return useCameraSettingsStore().currentCameraSettings.completeCalibrations.find(cal => cal.resolution.width === resolution.width && cal.resolution.height === resolution.height);
};
const getUniqueVideoResolutions = (): VideoFormat[] => {
const uniqueResolutions: VideoFormat[] = [];
useCameraSettingsStore().currentCameraSettings.validVideoFormats.forEach((format, index) => {
if(!uniqueResolutions.some(v => v.resolution.width === format.resolution.width && v.resolution.height === format.resolution.height)) {
format.index = index;
const calib = getCalibrationCoeffs(format.resolution);
if(calib !== undefined) {
format.standardDeviation = calib.standardDeviation;
format.mean = calib.perViewErrors.reduce((a, b) => a + b) / calib.perViewErrors.length;
format.horizontalFOV = 2 * Math.atan2(format.resolution.width/2, calib.intrinsics[0]) * (180/Math.PI);
format.verticalFOV = 2 * Math.atan2(format.resolution.height/2, calib.intrinsics[4]) * (180/Math.PI);
format.diagonalFOV = 2 * Math.atan2(Math.sqrt(format.resolution.width**2 + (format.resolution.height/(calib.intrinsics[4]/calib.intrinsics[0]))**2)/2, calib.intrinsics[0]) * (180/Math.PI);
}
uniqueResolutions.push(format);
}
});
uniqueResolutions.sort((a, b) => (b.resolution.width + b.resolution.height) - (a.resolution.width + a.resolution.height));
return uniqueResolutions;
};
const getUniqueVideoResolutionStrings = () => getUniqueVideoResolutions().map<{name: string, value: number}>(f => ({
name: `${f.resolution.width} X ${f.resolution.height}`,
// Index won't ever be undefined
value: f.index || 0
}));
const calibrationDivisors = computed(() => [1, 2, 4].filter(v => {
const currentRes = useCameraSettingsStore().currentVideoFormat.resolution;
return ((currentRes.width / v) >= 300 && (currentRes.height / v) >= 220) || (v === 1);
}));
const squareSizeIn = ref(1);
const patternWidth = ref(8);
const patternHeight = ref(8);
const boardType = ref<CalibrationBoardTypes>(CalibrationBoardTypes.Chessboard);
const downloadCalibBoard = () => {
const doc = new JsPDF({ unit: "in", format: "letter" });
doc.addFileToVFS("Prompt-Regular.tff", PromptRegular);
doc.addFont("Prompt-Regular.tff", "Prompt-Regular", "normal");
doc.setFont("Prompt-Regular");
doc.setFontSize(12);
const paperWidth = 8.5;
const paperHeight = 11.0;
switch (boardType.value) {
case CalibrationBoardTypes.Chessboard:
// eslint-disable-next-line no-case-declarations
const chessboardStartX = (paperWidth - patternWidth.value * squareSizeIn.value) / 2;
// eslint-disable-next-line no-case-declarations
const chessboardStartY = (paperHeight - patternWidth.value * squareSizeIn.value) / 2;
for (let squareY = 0; squareY < patternHeight.value; squareY++) {
for (let squareX = 0; squareX < patternWidth.value; squareX++) {
const xPos = chessboardStartX + squareX * squareSizeIn.value;
const yPos = chessboardStartY + squareY * squareSizeIn.value;
// Only draw the odd squares to create the chessboard pattern
if ((xPos + yPos + 0.25) % 2 === 0) {
doc.rect(xPos, yPos, squareSizeIn.value, squareSizeIn.value, "F");
}
}
}
break;
case CalibrationBoardTypes.DotBoard:
// eslint-disable-next-line no-case-declarations
const dotgridStartX = (paperWidth - (2 * (patternWidth.value - 1) + ((patternHeight.value - 1) % 2)) * squareSizeIn.value) / 2.0;
// eslint-disable-next-line no-case-declarations
const dotgridStartY = (paperHeight - (patternHeight.value - squareSizeIn.value)) / 2;
for (let squareY = 0; squareY < patternHeight.value; squareY++) {
for (let squareX = 0; squareX < patternWidth.value; squareX++) {
const xPos = dotgridStartX + (2 * squareX + (squareY % 2)) * squareSizeIn.value;
const yPos = dotgridStartY + squareY * squareSizeIn.value;
doc.circle(xPos, yPos, squareSizeIn.value / 4, "F");
}
}
break;
}
// Draw ruler pattern
const lineStartX = 1.0;
const lineEndX = paperWidth - lineStartX;
const lineY = paperHeight - 1.0;
doc.setLineWidth(0.01);
doc.line(lineStartX, lineY, lineEndX, lineY);
for (let tickX = lineStartX; tickX <= lineEndX; tickX++) {
doc.line(tickX, lineY, tickX, lineY + 0.25);
doc.text(`${tickX - 1}${tickX - 1 === 0 ? " in" : ""}`, tickX + 0.1, lineY + 0.25);
}
// Add branding
const logoImage = new Image();
logoImage.src = MonoLogo;
doc.addImage(logoImage, "PNG", 1.0, 0.75, 1.4, 0.5);
doc.text(`${patternWidth.value} x ${patternHeight.value} | ${squareSizeIn.value}in`, paperWidth - 1, 1.0,
{
maxWidth: (paperWidth - 2.0) / 2,
align: "right"
}
);
doc.save(`calibrationTarget-${CalibrationBoardTypes[boardType.value]}.pdf`);
};
const importCalibrationFromCalibDB = ref();
const openCalibUploadPrompt = () => {
importCalibrationFromCalibDB.value.click();
};
const readImportedCalibration = ({ files } : { files: FileList}) => {
files[0].text().then(text => {
useCameraSettingsStore().importCalibDB({ payload: text, filename: files[0].name })
.then((response) => {
useStateStore().showSnackbarMessage({
message: response.data.text || response.data,
color: response.status === 200 ? "success" : "error"
});
})
.catch(err => {
if (err.request) {
useStateStore().showSnackbarMessage({
message: "Error while uploading calibration file! The backend didn't respond to the upload attempt.",
color: "error"
});
} else {
useStateStore().showSnackbarMessage({
message: "Error while uploading calibration file!",
color: "error"
});
}
});
});
};
const isCalibrating = ref(false);
const startCalibration = () => {
useCameraSettingsStore().startPnPCalibration({
squareSizeIn: squareSizeIn.value,
patternHeight: patternHeight.value,
patternWidth: patternWidth.value,
boardType: boardType.value
});
// The Start PnP method already handles updating the backend so only a store update is required
useCameraSettingsStore().currentCameraSettings.currentPipelineIndex = WebsocketPipelineType.Calib3d;
isCalibrating.value = true;
calibCanceled.value = false;
};
const showCalibEndDialog = ref(false);
const calibCanceled = ref(false);
const calibSuccess = ref<boolean | undefined>(undefined);
const endCalibration = () => {
if(!useStateStore().calibrationData.hasEnoughImages) {
calibCanceled.value = true;
}
showCalibEndDialog.value = true;
// Check if calibration finished cleanly or was canceled
useCameraSettingsStore().endPnPCalibration()
.then(() => {
calibSuccess.value = true;
})
.catch(() => {
calibSuccess.value = false;
})
.finally(() => {
isCalibrating.value = false;
});
};
</script>
<template>
<div>
<v-card
class="pr-6 pb-3"
color="primary"
dark
>
<v-card-title>Camera Calibration</v-card-title>
<div class="ml-5">
<v-row>
<v-col
cols="12"
md="6"
>
<v-form
ref="form"
v-model="settingsValid"
>
<cv-select
v-model="useStateStore().calibrationData.videoFormatIndex"
label="Resolution"
:select-cols="7"
:disabled="isCalibrating"
tooltip="Resolution to calibrate at (you will have to calibrate every resolution you use 3D mode on)"
:items="getUniqueVideoResolutionStrings()"
/>
<cv-select
v-model="useCameraSettingsStore().currentPipelineSettings.streamingFrameDivisor"
label="Decimation"
tooltip="Resolution to which camera frames are downscaled for detection. Calibration still uses full-res"
:items="calibrationDivisors"
:select-cols="7"
@input="v => useCameraSettingsStore().changeCurrentPipelineSetting({streamingFrameDivisor: v}, false)"
/>
<cv-select
v-model="boardType"
label="Board Type"
tooltip="Calibration board pattern to use"
:select-cols="7"
:items="['Chessboard', 'Dotboard']"
:disabled="isCalibrating"
/>
<cv-number-input
v-model="squareSizeIn"
label="Pattern Spacing (in)"
tooltip="Spacing between pattern features in inches"
:disabled="isCalibrating"
:rules="[v => (v > 0) || 'Size must be positive']"
:label-cols="5"
/>
<cv-number-input
v-model="patternWidth"
label="Board Width (in)"
tooltip="Width of the board in dots or chessboard squares"
:disabled="isCalibrating"
:rules="[v => (v >= 4) || 'Width must be at least 4']"
:label-cols="5"
/>
<cv-number-input
v-model="patternHeight"
label="Board Height (in)"
tooltip="Height of the board in dots or chessboard squares"
:disabled="isCalibrating"
:rules="[v => (v >= 4) || 'Height must be at least 4']"
:label-cols="5"
/>
</v-form>
</v-col>
<v-col
cols="12"
md="6"
>
<v-row
align="start"
class="pb-4 pt-2"
>
<v-simple-table
fixed-header
height="100%"
dense
>
<thead>
<tr>
<th>
Resolution
</th>
<th>
Mean Error
</th>
<th>
Standard Deviation
</th>
<th>
Horizontal FOV
</th>
<th>
Vertical FOV
</th>
<th>
Diagonal FOV
</th>
</tr>
</thead>
<tbody>
<tr
v-for="(value, index) in getUniqueVideoResolutions()"
:key="index"
>
<td>{{ value.resolution.width }} X {{ value.resolution.height }}</td>
<td>{{ value.mean !== undefined ? value.mean.toFixed(2) + "px" : "-" }}</td>
<td>{{ value.standardDeviation !== undefined ? value.standardDeviation.toFixed(2) + "px" : "-" }}</td>
<td>{{ value.horizontalFOV !== undefined ? value.horizontalFOV.toFixed(2) + "°" : "-" }}</td>
<td>{{ value.verticalFOV !== undefined ? value.verticalFOV.toFixed(2) + "°" : "-" }}</td>
<td>{{ value.diagonalFOV !== undefined ? value.diagonalFOV.toFixed(2) + "°" : "-" }}</td>
</tr>
</tbody>
</v-simple-table>
</v-row>
<v-row justify="center">
<v-chip
v-show="isCalibrating"
label
:color="useStateStore().calibrationData.hasEnoughImages ? 'secondary' : 'gray'"
>
Snapshots: {{ useStateStore().calibrationData.imageCount }} of at least {{ useStateStore().calibrationData.minimumImageCount }}
</v-chip>
</v-row>
</v-col>
</v-row>
<v-row v-if="isCalibrating">
<v-col
cols="12"
class="pt-0"
>
<cv-slider
v-model="useCameraSettingsStore().currentPipelineSettings.cameraExposure"
:disabled="useCameraSettingsStore().currentCameraSettings.pipelineSettings.cameraAutoExposure"
label="Exposure"
tooltip="Directly controls how much light is allowed to fall onto the sensor, which affects apparent brightness"
:min="0"
:max="100"
:slider-cols="8"
:step="0.1"
@input="args => useCameraSettingsStore().changeCurrentPipelineSetting({cameraExposure: args}, false)"
/>
<cv-slider
v-model="useCameraSettingsStore().currentPipelineSettings.cameraBrightness"
label="Brightness"
:min="0"
:max="100"
:slider-cols="8"
@input="args => useCameraSettingsStore().changeCurrentPipelineSetting({cameraBrightness: args}, false)"
/>
<cv-switch
v-model="useCameraSettingsStore().currentPipelineSettings.cameraAutoExposure"
class="pt-2"
label="Auto Exposure"
:label-cols="4"
tooltip="Enables or Disables camera automatic adjustment for current lighting conditions"
@input="args => useCameraSettingsStore().changeCurrentPipelineSetting({cameraAutoExposure: args}, false)"
/>
<cv-slider
v-if="useCameraSettingsStore().currentPipelineSettings.cameraGain >= 0"
v-model="useCameraSettingsStore().currentPipelineSettings.cameraGain"
label="Camera Gain"
tooltip="Controls camera gain, similar to brightness"
:min="0"
:max="100"
@input="args => useCameraSettingsStore().changeCurrentPipelineSetting({cameraGain: args}, false)"
/>
<cv-slider
v-if="useCameraSettingsStore().currentPipelineSettings.cameraRedGain !== -1"
v-model="useCameraSettingsStore().currentPipelineSettings.cameraRedGain"
label="Red AWB Gain"
:min="0"
:max="100"
tooltip="Controls red automatic white balance gain, which affects how the camera captures colors in different conditions"
@input="args => useCameraSettingsStore().changeCurrentPipelineSetting({cameraRedGain: args}, false)"
/>
<cv-slider
v-if="useCameraSettingsStore().currentPipelineSettings.cameraBlueGain !== -1"
v-model="useCameraSettingsStore().currentPipelineSettings.cameraBlueGain"
label="Blue AWB Gain"
:min="0"
:max="100"
tooltip="Controls blue automatic white balance gain, which affects how the camera captures colors in different conditions"
@input="args => useCameraSettingsStore().changeCurrentPipelineSetting({cameraBlueGain: args}, false)"
/>
</v-col>
</v-row>
<v-row>
<v-col :cols="6">
<v-btn
small
color="secondary"
style="width: 100%;"
:disabled="!settingsValid"
@click="isCalibrating ? useCameraSettingsStore().takeCalibrationSnapshot(true) : startCalibration()"
>
{{ isCalibrating ? "Take Snapshot" : "Start Calibration" }}
</v-btn>
</v-col>
<v-col :cols="6">
<v-btn
small
:color="useStateStore().calibrationData.hasEnoughImages ? 'accent' : 'red'"
:class="useStateStore().calibrationData.hasEnoughImages ? 'black--text' : 'white---text'"
style="width: 100%;"
:disabled="!isCalibrating || !settingsValid"
@click="endCalibration"
>
{{ useStateStore().calibrationData.hasEnoughImages ? "Finish Calibration" : "Cancel Calibration" }}
</v-btn>
</v-col>
</v-row>
<v-row>
<v-col :cols="6">
<v-btn
color="accent"
small
outlined
style="width: 100%;"
:disabled="!settingsValid"
@click="downloadCalibBoard"
>
<v-icon left>
mdi-download
</v-icon>
Generate Board
</v-btn>
</v-col>
<v-col :cols="6">
<v-btn
color="secondary"
:disabled="isCalibrating"
small
style="width: 100%;"
@click="openCalibUploadPrompt"
>
<v-icon left>
mdi-upload
</v-icon>
Import From CalibDB
</v-btn>
<input
ref="importCalibrationFromCalibDB"
type="file"
accept=".json"
style="display: none;"
@change="readImportedCalibration"
>
</v-col>
</v-row>
</div>
</v-card>
<v-dialog
v-model="showCalibEndDialog"
width="500px"
:persistent="true"
>
<v-card
color="primary"
dark
>
<v-card-title class="pb-8">
Camera Calibration
</v-card-title>
<div class="ml-3">
<v-col style="text-align: center">
<template v-if="calibCanceled">
<v-icon
color="blue"
size="70"
>
mdi-cancel
</v-icon>
<v-card-text>Camera Calibration has been Canceled, the backend is attempting to cleanly cancel the calibration process.</v-card-text>
</template>
<template v-else-if="isCalibrating">
<v-progress-circular
indeterminate
:size="70"
:width="8"
color="accent"
/>
<v-card-text>Camera is being calibrated. This process may take several minutes...</v-card-text>
</template>
<template v-else-if="calibSuccess">
<v-icon
color="green"
size="70"
>
mdi-check-bold
</v-icon>
<v-card-text>
Camera has been successfully calibrated for {{ getUniqueVideoResolutionStrings().find(v => v.value === useStateStore().calibrationData.videoFormatIndex).name }}!
</v-card-text>
</template>
<template v-else>
<v-icon
color="red"
size="70"
>
mdi-close
</v-icon>
<v-card-text>Camera calibration failed! Make sure that the photos are taken such that the rainbow grid circles align with the corners of the chessboard, and try again. More information is available in the program logs.</v-card-text>
</template>
</v-col>
</div>
<v-card-actions>
<v-spacer />
<v-btn
v-if="!isCalibrating"
color="white"
text
@click="showCalibEndDialog = false"
>
OK
</v-btn>
</v-card-actions>
</v-card>
</v-dialog>
</div>
</template>
<style scoped lang="scss">
.v-data-table {
text-align: center;
th, td {
background-color: #006492 !important;
font-size: 1rem !important;
}
tbody :hover td {
background-color: #005281 !important;
}
::-webkit-scrollbar {
width: 0;
height: 0.55em;
border-radius: 5px;
}
::-webkit-scrollbar-track {
-webkit-box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.3);
border-radius: 10px;
}
::-webkit-scrollbar-thumb {
background-color: #ffd843;
border-radius: 10px;
}
}
</style>

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<script setup lang="ts">
import CvSelect from "@/components/common/cv-select.vue";
import CvNumberInput from "@/components/common/cv-number-input.vue";
import { useCameraSettingsStore } from "@/stores/settings/CameraSettingsStore";
import { useStateStore } from "@/stores/StateStore";
import { ref } from "vue";
const currentFov = ref(useCameraSettingsStore().currentCameraSettings.fov.value);
const saveCameraSettings = () => {
useCameraSettingsStore().updateCameraSettings({ fov: currentFov.value }, true)
.then((response) => {
useStateStore().showSnackbarMessage({
color: "success",
message: response.data.text || response.data
});
})
.catch(error => {
if(error.response) {
useStateStore().showSnackbarMessage({
color: "error",
message: error.response.data.text || error.response.data
});
} else if(error.request) {
useStateStore().showSnackbarMessage({
color: "error",
message: "Error while trying to process the request! The backend didn't respond."
});
} else {
useStateStore().showSnackbarMessage({
color: "error",
message: "An error occurred while trying to process the request."
});
}
})
.finally(() => {
useCameraSettingsStore().currentCameraSettings.fov.value = currentFov.value;
});
};
</script>
<template>
<v-card
class="mb-3 pr-6 pb-3"
color="primary"
dark
>
<v-card-title>Camera Settings</v-card-title>
<div class="ml-5">
<cv-select
v-model="useStateStore().currentCameraIndex"
label="Camera"
:items="useCameraSettingsStore().cameraNames"
:select-cols="8"
@input="args => {
currentFov = useCameraSettingsStore().cameras[args].fov.value;
useCameraSettingsStore().setCurrentCameraIndex(args);
}"
/>
<cv-number-input
v-model="currentFov"
:tooltip="!useCameraSettingsStore().currentCameraSettings.fov.managedByVendor ? 'Field of view (in degrees) of the camera measured across the diagonal of the frame, in a video mode which covers the whole sensor area.' : 'This setting is managed by a vendor'"
label="Maximum Diagonal FOV"
:disabled="useCameraSettingsStore().currentCameraSettings.fov.managedByVendor"
:label-cols="4"
/>
<br>
<v-btn
style="margin-top:10px"
small
color="secondary"
:disabled="currentFov === useCameraSettingsStore().currentCameraSettings.fov.value"
@click="saveCameraSettings"
>
<v-icon left>
mdi-content-save
</v-icon>
Save Changes
</v-btn>
</div>
</v-card>
</template>

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<script setup lang="ts">
import PhotonCameraStream from "@/components/app/photon-camera-stream.vue";
import { computed } from "vue";
import { useCameraSettingsStore } from "@/stores/settings/CameraSettingsStore";
import { PipelineType } from "@/types/PipelineTypes";
import { useStateStore } from "@/stores/StateStore";
import { useSettingsStore } from "@/stores/settings/GeneralSettingsStore";
const props = defineProps<{
// TODO fully update v-model usage in custom components on Vue3 update
value: number[]
}>();
const emit = defineEmits<{
(e: "input", value: number[]): void
}>();
const localValue = computed({
get: () => props.value,
set: v => emit("input", v)
});
const driverMode = computed<boolean>({
get: () => useCameraSettingsStore().isDriverMode,
set: v => useCameraSettingsStore().changeCurrentPipelineIndex(v ? -1 : useCameraSettingsStore().currentCameraSettings.lastPipelineIndex || 0, true)
});
const fpsTooLow = computed<boolean>(() => {
const currFPS = useStateStore().pipelineResults?.fps || 0;
const targetFPS = useCameraSettingsStore().currentVideoFormat.fps;
const driverMode = useCameraSettingsStore().isDriverMode;
const gpuAccel = useSettingsStore().general.gpuAcceleration !== undefined;
const isReflective = useCameraSettingsStore().currentPipelineSettings.pipelineType === PipelineType.Reflective;
return (currFPS - targetFPS) < -5 && currFPS !== 0 && !driverMode && gpuAccel && isReflective;
});
</script>
<template>
<v-card
class="mb-3 pr-6 pb-3 pa-4"
color="primary"
dark
>
<v-card-title
class="pb-0 mb-2 pl-4 pt-1"
style="min-height: 50px; justify-content: space-between; align-content: center"
>
<div style="display: flex; flex-wrap: wrap">
<div>
<span
class="mr-4"
style="white-space: nowrap"
>
Cameras
</span>
</div>
<div>
<v-chip
label
:color="fpsTooLow ? 'error' : 'transparent'"
:text-color="fpsTooLow ? '#C7EA46' : '#ff4d00'"
style="font-size: 1rem; padding: 0; margin: 0;"
>
<span class="pr-1">
{{ Math.round(useStateStore().pipelineResults?.fps || 0) }}&nbsp;FPS &ndash; {{ Math.min(Math.round(useStateStore().pipelineResults?.latency || 0), 9999) }} ms latency
</span>
</v-chip>
</div>
</div>
<div>
<v-switch
v-model="driverMode"
:disabled="useCameraSettingsStore().isCalibrationMode"
label="Driver Mode"
style="margin-left: auto;"
color="accent"
class="pt-2"
/>
</div>
</v-card-title>
<div
class="stream-container pb-4"
>
<div class="stream">
<photon-camera-stream
v-show="value.includes(0)"
stream-type="Raw"
style="max-width: 100%"
/>
</div>
<div class="stream">
<photon-camera-stream
v-show="value.includes(1)"
stream-type="Processed"
style="max-width: 100%"
/>
</div>
</div>
<v-divider />
<div class="pt-4">
<p style="color: white;">
Stream Display
</p>
<v-btn-toggle
v-model="localValue"
:multiple="true"
mandatory
dark
class="fill"
style="width: 100%"
>
<v-btn
color="secondary"
class="fill"
:disabled="useCameraSettingsStore().isDriverMode || useCameraSettingsStore().isCalibrationMode"
>
<v-icon>mdi-import</v-icon>
<span>Raw</span>
</v-btn>
<v-btn
color="secondary"
class="fill"
:disabled="useCameraSettingsStore().isDriverMode || useCameraSettingsStore().isCalibrationMode"
>
<v-icon>mdi-export</v-icon>
<span>Processed</span>
</v-btn>
</v-btn-toggle>
</div>
</v-card>
</template>
<style scoped>
.v-btn-toggle.fill {
width: 100%;
height: 100%;
}
.v-btn-toggle.fill > .v-btn {
width: 50%;
height: 100%;
}
th {
width: 80px;
text-align: center;
}
.stream-container {
display: flex;
flex-wrap: wrap;
align-items: center;
gap: 12px;
}
.stream {
display: flex;
justify-content: center;
width: 100%;
}
@media only screen and (min-width: 512px) and (max-width: 960px) {
.stream-container {
flex-wrap: nowrap;
}
.stream {
width: 50%;
}
}
</style>