# HG changeset patch # User Paul Fisher # Date 1743537892 14400 # Node ID 4af79d69b12eff556ea0d00e4daf38bf7190ed80 # Parent 5cc8ce54ad845d5b9d329e31ac113178c895cbc1 Use units better suited for science. diff -r 5cc8ce54ad84 -r 4af79d69b12e weather_server/static/graph.js --- a/weather_server/static/graph.js Tue Apr 01 15:54:42 2025 -0400 +++ b/weather_server/static/graph.js Tue Apr 01 16:04:52 2025 -0400 @@ -10,11 +10,15 @@ define("math", ["require", "exports"], function (require, exports) { "use strict"; Object.defineProperty(exports, "__esModule", { value: true }); - exports.dewPointC = exports.cToF = void 0; + exports.dewPointC = exports.cToK = exports.cToF = void 0; function cToF(tempC) { return tempC * 9 / 5 + 32; } exports.cToF = cToF; + function cToK(tempC) { + return tempC + 273.15; + } + exports.cToK = cToK; const MAGNUS_B = 17.62; const MAGNUS_C = 243.12; function gammaFn(tempC, rhPct) { @@ -48,8 +52,8 @@ return; root.classList.remove('plain'); root.classList.add('fancy'); - const tempsF = readings.map(s => [s.sample_time, math_1.cToF(s.temp_c)]); - const dewPointsF = readings.map(s => [s.sample_time, math_1.cToF(math_1.dewPointC(s.temp_c, s.rh_pct))]); + const tempsF = readings.map(s => [s.sample_time, (0, math_1.cToK)(s.temp_c)]); + const dewPointsF = readings.map(s => [s.sample_time, (0, math_1.cToK)((0, math_1.dewPointC)(s.temp_c, s.rh_pct))]); setUpElement(tempElement, [startTS, nowTS], tempsF); setUpElement(dewPointElement, [startTS, nowTS], dewPointsF); }); diff -r 5cc8ce54ad84 -r 4af79d69b12e weather_server/static/graph.js.map --- a/weather_server/static/graph.js.map Tue Apr 01 15:54:42 2025 -0400 +++ b/weather_server/static/graph.js.map Tue Apr 01 16:04:52 2025 -0400 @@ -1,1 +1,1 @@ 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Converts Celsius to Fahrenheit. */\nexport function cToF(tempC: number): number {\n return tempC * 9 / 5 + 32;\n}\n\nconst MAGNUS_B = 17.62;\nconst MAGNUS_C = 243.12;\n\n/** The gamma function to calculate dew point. */\nfunction gammaFn(tempC: number, rhPct: number): number {\n return Math.log(rhPct / 100) + MAGNUS_B * tempC / (MAGNUS_C + tempC);\n}\n\n/** Calculates the dew point. */\nexport function dewPointC(tempC: any, rhPct: any): number {\n const gamma = gammaFn(tempC, rhPct);\n return MAGNUS_C * gamma / (MAGNUS_B - gamma);\n}\n","import { WeatherResponse } from './apis';\nimport { cToF, dewPointC } from './math';\n\n/** The amount of time we will draw on the graph. */\nconst HISTORY_SECONDS = 60 * 60 * 4;\n/** The amount of buffer room we will request before HISTORY_SECONDS. */\nconst BUFFER_SECONDS = 300;\n\n/**\n * Sets up everything.\n * @param tempElement The element where temperature data is.\n * @param dewPointElement The element where the dew point is.\n */\nexport async function setUp(\n root: HTMLElement,\n tempElement: HTMLElement,\n dewPointElement: HTMLElement) {\n const nowTS = new Date().getTime() / 1000;\n const startTS = nowTS - HISTORY_SECONDS;\n const query = new URL('?', location.href);\n query.pathname = query.pathname + '/recent';\n query.searchParams.set('seconds', String(HISTORY_SECONDS + BUFFER_SECONDS));\n const results = await fetch(query.href);\n if (!results.ok) return;\n const data: WeatherResponse = await results.json();\n const readings = data.readings;\n if (readings.length === 0) return;\n root.classList.remove('plain');\n root.classList.add('fancy');\n\n const tempsF =\n readings.map(s => [s.sample_time, cToF(s.temp_c)] as Point);\n const dewPointsF = readings.map(\n s => [s.sample_time, cToF(dewPointC(s.temp_c, s.rh_pct))] as Point);\n setUpElement(tempElement, [startTS, nowTS], tempsF);\n setUpElement(dewPointElement, [startTS, nowTS], dewPointsF);\n}\n\ntype Point = [number, number];\n\n/**\n * Sets up charting for this element.\n * @param element The element to put a graph in.\n * @param timeRange The `[start, end]` of the time range.\n * @param data The data to chart.\n */\nfunction setUpElement(\n element: HTMLElement, timeRange: [number, number], data: Point[]) {\n if (data.length === 0) return;\n const chart = new Chart(element, timeRange, data);\n chart.resize();\n addEventListener('resize', () => chart.resize());\n}\n\n/** The number of degrees that the graph shows vertically. */\nconst Y_DEGREE_RANGE = 12;\n\nconst LINE_WIDTH_PX = 2;\nconst GRID_WIDTH_PX = 0.5;\n\nconst FONT_SIZE = '40px';\n\nclass Chart {\n private readonly canvas: HTMLCanvasElement;\n private readonly unit: string;\n /**\n * Creates a new chart.\n * @param element The parent element to create ``-based chart in.\n * @param timeRange `[start, end]` of the range to chart as Unix timestamps.\n * @param data The data to chart.\n */\n constructor(\n private readonly element: HTMLElement,\n private readonly timeRange: [number, number],\n private readonly data: Point[],\n private readonly timezone?: string) {\n this.canvas = document.createElement('canvas');\n this.element.insertBefore(this.canvas, element.firstChild);\n const unit = element.getElementsByClassName('unit')[0];\n this.unit = unit && unit.textContent || '';\n }\n\n resize() {\n const dpr = self.devicePixelRatio || 1;\n const [w, h] = this.size();\n const pxSize: Point = [w * dpr, h * dpr];\n this.canvas.width = pxSize[0];\n this.canvas.height = pxSize[1];\n const ctx = this.canvas.getContext('2d')!;\n ctx.clearRect(0, 0, pxSize[0], pxSize[1]);\n ctx.scale(dpr, dpr);\n this.redraw(ctx);\n }\n\n private redraw(ctx: CanvasRenderingContext2D) {\n ctx.strokeStyle = this.stroke();\n ctx.lineJoin = 'round';\n ctx.lineWidth = LINE_WIDTH_PX;\n ctx.font = `bold ${FONT_SIZE} ${this.font()}`;\n\n const onScreenData = this.data.filter(\n ([time, _]) => this.timeRange[0] <= time);\n\n const yRange = calculateYRange(onScreenData.map(d => d[1]));\n\n const [fullW, fullH] = this.size();\n const [xPad, yMargin] = this.measureMargin(ctx);\n const graphSize: Point = [fullW - xPad, fullH];\n\n ctx.beginPath();\n for (const pt of this.data) {\n const projected = project(pt, graphSize, this.timeRange, yRange);\n ctx.lineTo(...projected);\n }\n ctx.stroke();\n ctx.beginPath();\n const lastPt = this.data[this.data.length - 1];\n const center = project(lastPt, graphSize, this.timeRange, yRange);\n ctx.ellipse(\n center[0],\n center[1],\n 1.5 * LINE_WIDTH_PX,\n 1.5 * LINE_WIDTH_PX,\n 0,\n 0,\n 2 * Math.PI);\n ctx.fillStyle = getComputedStyle(this.element).backgroundColor!;\n ctx.fill();\n ctx.stroke();\n\n this.drawGrid(ctx, graphSize, yRange);\n\n ctx.fillStyle = this.stroke();\n ctx.textAlign = 'left';\n ctx.textBaseline = 'top';\n ctx.fillText(\n `${niceNumber(lastPt[1])} ${this.unit}`,\n center[0] + 5 * LINE_WIDTH_PX,\n center[1] + yMargin);\n }\n\n private measureMargin(ctx: CanvasRenderingContext2D): [number, number] {\n const bbox = ctx.measureText(`−99 ${this.unit}`);\n const margin =\n 5 * LINE_WIDTH_PX + // margin to text\n bbox.width + // max (?) width of text\n 16; // Pixel margin to wall.\n return [margin, -31.5 / 2];\n }\n\n private drawGrid(\n ctx: CanvasRenderingContext2D,\n size: Point,\n yRange: [number, number],\n ) {\n ctx.save();\n ctx.lineCap = 'butt';\n ctx.lineWidth = GRID_WIDTH_PX;\n\n this.drawTime(ctx, size);\n this.drawTemps(ctx, size, yRange);\n\n ctx.restore();\n }\n\n private drawTime(ctx: CanvasRenderingContext2D, [w, h]: Point): void {\n const minutes = minutesOf(this.timeRange, this.timezone);\n for (const [ts, hhmm] of minutes) {\n const mins = Number(hhmm.split(':')[1]);\n let opacity: number;\n if (mins === 0) {\n opacity = 1;\n } else if (mins % 15 === 0) {\n opacity = 0.5;\n } else {\n continue;\n }\n const x = project1D(ts, w, this.timeRange);\n ctx.save();\n ctx.globalAlpha = opacity;\n ctx.beginPath();\n ctx.moveTo(x, 0);\n ctx.lineTo(x, h);\n ctx.stroke();\n ctx.restore();\n }\n }\n\n private drawTemps(ctx: CanvasRenderingContext2D, [w, h]: Point, [yLo, yHi]: [number, number]): void {\n const lo = Math.floor(yLo);\n for (let deg = lo; deg < yHi; deg++) {\n const ones = deg % 10;\n let opacity: number;\n if (ones === 0) {\n opacity = 1;\n } else if (ones === 5) {\n opacity = 0.5;\n } else {\n opacity = 0.15;\n }\n const y = project1D(deg, h, [yHi, yLo]);\n ctx.save();\n ctx.globalAlpha = opacity;\n ctx.beginPath();\n ctx.moveTo(0, y);\n ctx.lineTo(w, y);\n ctx.stroke();\n ctx.restore();\n }\n }\n\n private size(): Point {\n const cssSize = this.element.getBoundingClientRect();\n return [cssSize.width, cssSize.height];\n }\n\n private stroke() {\n return getComputedStyle(this.element).color;\n }\n\n private font() {\n return getComputedStyle(this.element).fontFamily;\n }\n}\n\nfunction niceNumber(n: number) {\n return Math.floor(n).toLocaleString('en-us').replace('-', '−');\n}\n\n/** The closest that the last point will be allowed to get to the edge. */\nconst EDGE_FRACTION = 0.125;\n\n/**\n * Determines what the Y range of the chart should be.\n * @param ys The Y values of the chart.\n * @return The lowest and highest values of the range.\n */\nfunction calculateYRange(ys: number[]): [number, number] {\n const yMax = Math.max(...ys);\n const yMin = Math.min(...ys);\n const yMid = (yMin + yMax) / 2;\n const lastY = ys[ys.length - 1];\n const yLo = yMid - Y_DEGREE_RANGE / 2;\n const yProportion = Math.max(\n Math.min((lastY - yLo) / Y_DEGREE_RANGE, 1 - EDGE_FRACTION),\n EDGE_FRACTION);\n const rangeLo = lastY - yProportion * Y_DEGREE_RANGE;\n return [rangeLo, rangeLo + Y_DEGREE_RANGE];\n}\n\n/**\n * Projects a Cartesian coordinate into Canvas space.\n *\n * @param coord The `[x, y]` coordinate to project.\n * @param size The `[width, height]` of the context.\n * @param xRange The range of X values in the context.\n * @param yRange The range of Y values in the context.\n * @return The `[x, y]` coordinate in Canvas space.\n */\nfunction project(\n coord: Point,\n size: Point,\n xRange: [number, number],\n yRange: [number, number],\n): Point {\n const [x, y] = coord;\n // Canvas coordinates are upside-down, so we invert the Y range.\n const [yMax, yMin] = yRange;\n const [xSize, ySize] = size;\n return [\n project1D(x, xSize, xRange),\n project1D(y, ySize, [yMin, yMax]),\n ];\n}\n\nfunction project1D(coord: number, size: number, range: [number, number]): number {\n const [min, max] = range;\n const span = max - min;\n return (coord - min) / span * size;\n}\n\nconst MINUTE = 60;\n\n/**\n * Produces a list of every minute in the graph, in the form of\n * `[unix time, \"HH:MM\"][]`.\n * @param start The Unix start time.\n * @param end The Unix end time.\n * @param zone The timezone name.\n */\nfunction minutesOf(\n [start, end]: [number, number], zone?: string): Array<[number, string]> {\n const formatter = new Intl.DateTimeFormat(\n 'sv', {timeZone: zone, hour: '2-digit', minute: '2-digit'})\n const startSeconds = MINUTE 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Converts Celsius to Fahrenheit. */\nexport function cToF(tempC: number): number {\n return tempC * 9 / 5 + 32;\n}\n\n/** Converts Celsius to Kelvin. */\nexport function cToK(tempC: number): number {\n return tempC + 273.15;\n}\n\nconst MAGNUS_B = 17.62;\nconst MAGNUS_C = 243.12;\n\n/** The gamma function to calculate dew point. */\nfunction gammaFn(tempC: number, rhPct: number): number {\n return Math.log(rhPct / 100) + MAGNUS_B * tempC / (MAGNUS_C + tempC);\n}\n\n/** Calculates the dew point. */\nexport function dewPointC(tempC: any, rhPct: any): number {\n const gamma = gammaFn(tempC, rhPct);\n return MAGNUS_C * gamma / (MAGNUS_B - gamma);\n}\n","import { WeatherResponse } from './apis';\nimport { cToK, dewPointC } from './math';\n\n/** The amount of time we will draw on the graph. */\nconst HISTORY_SECONDS = 60 * 60 * 4;\n/** The amount of buffer room we will request before HISTORY_SECONDS. */\nconst BUFFER_SECONDS = 300;\n\n/**\n * Sets up everything.\n * @param tempElement The element where temperature data is.\n * @param dewPointElement The element where the dew point is.\n */\nexport async function setUp(\n root: HTMLElement,\n tempElement: HTMLElement,\n dewPointElement: HTMLElement) {\n const nowTS = new Date().getTime() / 1000;\n const startTS = nowTS - HISTORY_SECONDS;\n const query = new URL('?', location.href);\n query.pathname = query.pathname + '/recent';\n query.searchParams.set('seconds', String(HISTORY_SECONDS + BUFFER_SECONDS));\n const results = await fetch(query.href);\n if (!results.ok) return;\n const data: WeatherResponse = await results.json();\n const readings = data.readings;\n if (readings.length === 0) return;\n root.classList.remove('plain');\n root.classList.add('fancy');\n\n const tempsF =\n readings.map(s => [s.sample_time, cToK(s.temp_c)] as Point);\n const dewPointsF = readings.map(\n s => [s.sample_time, cToK(dewPointC(s.temp_c, s.rh_pct))] as Point);\n setUpElement(tempElement, [startTS, nowTS], tempsF);\n setUpElement(dewPointElement, [startTS, nowTS], dewPointsF);\n}\n\ntype Point = [number, number];\n\n/**\n * Sets up charting for this element.\n * @param element The element to put a graph in.\n * @param timeRange The `[start, end]` of the time range.\n * @param data The data to chart.\n */\nfunction setUpElement(\n element: HTMLElement, timeRange: [number, number], data: Point[]) {\n if (data.length === 0) return;\n const chart = new Chart(element, timeRange, data);\n chart.resize();\n addEventListener('resize', () => chart.resize());\n}\n\n/** The number of degrees that the graph shows vertically. */\nconst Y_DEGREE_RANGE = 12;\n\nconst LINE_WIDTH_PX = 2;\nconst GRID_WIDTH_PX = 0.5;\n\nconst FONT_SIZE = '40px';\n\nclass Chart {\n private readonly canvas: HTMLCanvasElement;\n private readonly unit: string;\n /**\n * Creates a new chart.\n * @param element The parent element to create ``-based chart in.\n * @param timeRange `[start, end]` of the range to chart as Unix timestamps.\n * @param data The data to chart.\n */\n constructor(\n private readonly element: HTMLElement,\n private readonly timeRange: [number, number],\n private readonly data: Point[],\n private readonly timezone?: string) {\n this.canvas = document.createElement('canvas');\n this.element.insertBefore(this.canvas, element.firstChild);\n const unit = element.getElementsByClassName('unit')[0];\n this.unit = unit && unit.textContent || '';\n }\n\n resize() {\n const dpr = self.devicePixelRatio || 1;\n const [w, h] = this.size();\n const pxSize: Point = [w * dpr, h * dpr];\n this.canvas.width = pxSize[0];\n this.canvas.height = pxSize[1];\n const ctx = this.canvas.getContext('2d')!;\n ctx.clearRect(0, 0, pxSize[0], pxSize[1]);\n ctx.scale(dpr, dpr);\n this.redraw(ctx);\n }\n\n private redraw(ctx: CanvasRenderingContext2D) {\n ctx.strokeStyle = this.stroke();\n ctx.lineJoin = 'round';\n ctx.lineWidth = LINE_WIDTH_PX;\n ctx.font = `bold ${FONT_SIZE} ${this.font()}`;\n\n const onScreenData = this.data.filter(\n ([time, _]) => this.timeRange[0] <= time);\n\n const yRange = calculateYRange(onScreenData.map(d => d[1]));\n\n const [fullW, fullH] = this.size();\n const [xPad, yMargin] = this.measureMargin(ctx);\n const graphSize: Point = [fullW - xPad, fullH];\n\n ctx.beginPath();\n for (const pt of this.data) {\n const projected = project(pt, graphSize, this.timeRange, yRange);\n ctx.lineTo(...projected);\n }\n ctx.stroke();\n ctx.beginPath();\n const lastPt = this.data[this.data.length - 1];\n const center = project(lastPt, graphSize, this.timeRange, yRange);\n ctx.ellipse(\n center[0],\n center[1],\n 1.5 * LINE_WIDTH_PX,\n 1.5 * LINE_WIDTH_PX,\n 0,\n 0,\n 2 * Math.PI);\n ctx.fillStyle = getComputedStyle(this.element).backgroundColor!;\n ctx.fill();\n ctx.stroke();\n\n this.drawGrid(ctx, graphSize, yRange);\n\n ctx.fillStyle = this.stroke();\n ctx.textAlign = 'left';\n ctx.textBaseline = 'top';\n ctx.fillText(\n `${niceNumber(lastPt[1])} ${this.unit}`,\n center[0] + 5 * LINE_WIDTH_PX,\n center[1] + yMargin);\n }\n\n private measureMargin(ctx: CanvasRenderingContext2D): [number, number] {\n const bbox = ctx.measureText(`−99 ${this.unit}`);\n const margin =\n 5 * LINE_WIDTH_PX + // margin to text\n bbox.width + // max (?) width of text\n 16; // Pixel margin to wall.\n return [margin, -31.5 / 2];\n }\n\n private drawGrid(\n ctx: CanvasRenderingContext2D,\n size: Point,\n yRange: [number, number],\n ) {\n ctx.save();\n ctx.lineCap = 'butt';\n ctx.lineWidth = GRID_WIDTH_PX;\n\n this.drawTime(ctx, size);\n this.drawTemps(ctx, size, yRange);\n\n ctx.restore();\n }\n\n private drawTime(ctx: CanvasRenderingContext2D, [w, h]: Point): void {\n const minutes = minutesOf(this.timeRange, this.timezone);\n for (const [ts, hhmm] of minutes) {\n const mins = Number(hhmm.split(':')[1]);\n let opacity: number;\n if (mins === 0) {\n opacity = 1;\n } else if (mins % 15 === 0) {\n opacity = 0.5;\n } else {\n continue;\n }\n const x = project1D(ts, w, this.timeRange);\n ctx.save();\n ctx.globalAlpha = opacity;\n ctx.beginPath();\n ctx.moveTo(x, 0);\n ctx.lineTo(x, h);\n ctx.stroke();\n ctx.restore();\n }\n }\n\n private drawTemps(ctx: CanvasRenderingContext2D, [w, h]: Point, [yLo, yHi]: [number, number]): void {\n const lo = Math.floor(yLo);\n for (let deg = lo; deg < yHi; deg++) {\n const ones = deg % 10;\n let opacity: number;\n if (ones === 0) {\n opacity = 1;\n } else if (ones === 5) {\n opacity = 0.5;\n } else {\n opacity = 0.15;\n }\n const y = project1D(deg, h, [yHi, yLo]);\n ctx.save();\n ctx.globalAlpha = opacity;\n ctx.beginPath();\n ctx.moveTo(0, y);\n ctx.lineTo(w, y);\n ctx.stroke();\n ctx.restore();\n }\n }\n\n private size(): Point {\n const cssSize = this.element.getBoundingClientRect();\n return [cssSize.width, cssSize.height];\n }\n\n private stroke() {\n return getComputedStyle(this.element).color;\n }\n\n private font() {\n return getComputedStyle(this.element).fontFamily;\n }\n}\n\nfunction niceNumber(n: number) {\n return Math.floor(n).toLocaleString('en-us').replace('-', '−');\n}\n\n/** The closest that the last point will be allowed to get to the edge. */\nconst EDGE_FRACTION = 0.125;\n\n/**\n * Determines what the Y range of the chart should be.\n * @param ys The Y values of the chart.\n * @return The lowest and highest values of the range.\n */\nfunction calculateYRange(ys: number[]): [number, number] {\n const yMax = Math.max(...ys);\n const yMin = Math.min(...ys);\n const yMid = (yMin + yMax) / 2;\n const lastY = ys[ys.length - 1];\n const yLo = yMid - Y_DEGREE_RANGE / 2;\n const yProportion = Math.max(\n Math.min((lastY - yLo) / Y_DEGREE_RANGE, 1 - EDGE_FRACTION),\n EDGE_FRACTION);\n const rangeLo = lastY - yProportion * Y_DEGREE_RANGE;\n return [rangeLo, rangeLo + Y_DEGREE_RANGE];\n}\n\n/**\n * Projects a Cartesian coordinate into Canvas space.\n *\n * @param coord The `[x, y]` coordinate to project.\n * @param size The `[width, height]` of the context.\n * @param xRange The range of X values in the context.\n * @param yRange The range of Y values in the context.\n * @return The `[x, y]` coordinate in Canvas space.\n */\nfunction project(\n coord: Point,\n size: Point,\n xRange: [number, number],\n yRange: [number, number],\n): Point {\n const [x, y] = coord;\n // Canvas coordinates are upside-down, so we invert the Y range.\n const [yMax, yMin] = yRange;\n const [xSize, ySize] = size;\n return [\n project1D(x, xSize, xRange),\n project1D(y, ySize, [yMin, yMax]),\n ];\n}\n\nfunction project1D(coord: number, size: number, range: [number, number]): number {\n const [min, max] = range;\n const span = max - min;\n return (coord - min) / span * size;\n}\n\nconst MINUTE = 60;\n\n/**\n * Produces a list of every minute in the graph, in the form of\n * `[unix time, \"HH:MM\"][]`.\n * @param start The Unix start time.\n * @param end The Unix end time.\n * @param zone The timezone name.\n */\nfunction minutesOf(\n [start, end]: [number, number], zone?: string): Array<[number, string]> {\n const formatter = new Intl.DateTimeFormat(\n 'sv', {timeZone: zone, hour: '2-digit', minute: '2-digit'})\n const startSeconds = MINUTE * Math.floor(start / MINUTE);\n const result: Array<[number, string]> = [];\n for (let t = startSeconds; t <= end; t += MINUTE) {\n result.push([t, goodBitsOnly(formatter.format(new Date(t * 1000)))])\n }\n return result;\n}\n\n\n/** Takes all the special characters out of the given datetime string. */\nfunction goodBitsOnly(s: string): string {\n return s.replace(/[^0-9 :-]/, '');\n}\n"]} \ No newline at end of file diff -r 5cc8ce54ad84 -r 4af79d69b12e weather_server/templates/index.html --- a/weather_server/templates/index.html Tue Apr 01 15:54:42 2025 -0400 +++ b/weather_server/templates/index.html Tue Apr 01 16:04:52 2025 -0400 @@ -21,8 +21,8 @@ {%- set reading = location.latest() -%} {%- if reading -%} - {{ reading.temp_f|int -}} -  °F + {{ reading.temp_k|int -}} +  K {%- else -%} ??? {%- endif -%} diff -r 5cc8ce54ad84 -r 4af79d69b12e weather_server/templates/location.html --- a/weather_server/templates/location.html Tue Apr 01 15:54:42 2025 -0400 +++ b/weather_server/templates/location.html Tue Apr 01 16:04:52 2025 -0400 @@ -19,9 +19,9 @@ - {{- last_reading.temp_f|int -}} + {{- last_reading.temp_k|int -}} - °F + K

@@ -29,9 +29,9 @@ - {{- last_reading.dew_point_f|int -}} + {{- last_reading.dew_point_k|int -}} - °F + K

diff -r 5cc8ce54ad84 -r 4af79d69b12e weather_server/types.py --- a/weather_server/types.py Tue Apr 01 15:54:42 2025 -0400 +++ b/weather_server/types.py Tue Apr 01 16:04:52 2025 -0400 @@ -13,6 +13,10 @@ return c * 9 / 5 + 32 +def c_to_k(c: float) -> float: + return c + 273.15 + + # Values from Sontag1990 via Wikipedia: # https://en.wikipedia.org/wiki/Dew_point _MAGNUS_B = 17.62 @@ -41,6 +45,10 @@ @property def temp_f(self) -> float: return c_to_f(self.temp_c) + + @property + def temp_k(self) -> float: + return c_to_k(self.temp_k) @property def dew_point_c(self) -> float: @@ -50,6 +58,10 @@ @property def dew_point_f(self) -> float: return c_to_f(self.dew_point_c) + + @property + def dew_point_k(self) -> float: + return c_to_k(self.dew_point_c) @classmethod def from_dict(cls: t.Type[T], d: t.Dict[str, t.Any]) -> T: diff -r 5cc8ce54ad84 -r 4af79d69b12e weather_server/typescript/app/graph.ts --- a/weather_server/typescript/app/graph.ts Tue Apr 01 15:54:42 2025 -0400 +++ b/weather_server/typescript/app/graph.ts Tue Apr 01 16:04:52 2025 -0400 @@ -1,5 +1,5 @@ import { WeatherResponse } from './apis'; -import { cToF, dewPointC } from './math'; +import { cToK, dewPointC } from './math'; /** The amount of time we will draw on the graph. */ const HISTORY_SECONDS = 60 * 60 * 4; @@ -29,9 +29,9 @@ root.classList.add('fancy'); const tempsF = - readings.map(s => [s.sample_time, cToF(s.temp_c)] as Point); + readings.map(s => [s.sample_time, cToK(s.temp_c)] as Point); const dewPointsF = readings.map( - s => [s.sample_time, cToF(dewPointC(s.temp_c, s.rh_pct))] as Point); + s => [s.sample_time, cToK(dewPointC(s.temp_c, s.rh_pct))] as Point); setUpElement(tempElement, [startTS, nowTS], tempsF); setUpElement(dewPointElement, [startTS, nowTS], dewPointsF); } diff -r 5cc8ce54ad84 -r 4af79d69b12e weather_server/typescript/app/math.ts --- a/weather_server/typescript/app/math.ts Tue Apr 01 15:54:42 2025 -0400 +++ b/weather_server/typescript/app/math.ts Tue Apr 01 16:04:52 2025 -0400 @@ -3,6 +3,11 @@ return tempC * 9 / 5 + 32; } +/** Converts Celsius to Kelvin. */ +export function cToK(tempC: number): number { + return tempC + 273.15; +} + const MAGNUS_B = 17.62; const MAGNUS_C = 243.12;