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- {"ast":null,"code":"import { PrecisionDate } from \"./precisionDate.js\";\n/**\n * Performance monitor tracks rolling average frame-time and frame-time variance over a user defined sliding-window\n */\nexport class PerformanceMonitor {\n /**\n * constructor\n * @param frameSampleSize The number of samples required to saturate the sliding window\n */\n constructor(frameSampleSize = 30) {\n this._enabled = true;\n this._rollingFrameTime = new RollingAverage(frameSampleSize);\n }\n /**\n * Samples current frame\n * @param timeMs A timestamp in milliseconds of the current frame to compare with other frames\n */\n sampleFrame(timeMs = PrecisionDate.Now) {\n if (!this._enabled) {\n return;\n }\n if (this._lastFrameTimeMs != null) {\n const dt = timeMs - this._lastFrameTimeMs;\n this._rollingFrameTime.add(dt);\n }\n this._lastFrameTimeMs = timeMs;\n }\n /**\n * Returns the average frame time in milliseconds over the sliding window (or the subset of frames sampled so far)\n */\n get averageFrameTime() {\n return this._rollingFrameTime.average;\n }\n /**\n * Returns the variance frame time in milliseconds over the sliding window (or the subset of frames sampled so far)\n */\n get averageFrameTimeVariance() {\n return this._rollingFrameTime.variance;\n }\n /**\n * Returns the frame time of the most recent frame\n */\n get instantaneousFrameTime() {\n return this._rollingFrameTime.history(0);\n }\n /**\n * Returns the average framerate in frames per second over the sliding window (or the subset of frames sampled so far)\n */\n get averageFPS() {\n return 1000.0 / this._rollingFrameTime.average;\n }\n /**\n * Returns the average framerate in frames per second using the most recent frame time\n */\n get instantaneousFPS() {\n const history = this._rollingFrameTime.history(0);\n if (history === 0) {\n return 0;\n }\n return 1000.0 / history;\n }\n /**\n * Returns true if enough samples have been taken to completely fill the sliding window\n */\n get isSaturated() {\n return this._rollingFrameTime.isSaturated();\n }\n /**\n * Enables contributions to the sliding window sample set\n */\n enable() {\n this._enabled = true;\n }\n /**\n * Disables contributions to the sliding window sample set\n * Samples will not be interpolated over the disabled period\n */\n disable() {\n this._enabled = false;\n //clear last sample to avoid interpolating over the disabled period when next enabled\n this._lastFrameTimeMs = null;\n }\n /**\n * Returns true if sampling is enabled\n */\n get isEnabled() {\n return this._enabled;\n }\n /**\n * Resets performance monitor\n */\n reset() {\n //clear last sample to avoid interpolating over the disabled period when next enabled\n this._lastFrameTimeMs = null;\n //wipe record\n this._rollingFrameTime.reset();\n }\n}\n/**\n * RollingAverage\n *\n * Utility to efficiently compute the rolling average and variance over a sliding window of samples\n */\nexport class RollingAverage {\n /**\n * constructor\n * @param length The number of samples required to saturate the sliding window\n */\n constructor(length) {\n this._samples = new Array(length);\n this.reset();\n }\n /**\n * Adds a sample to the sample set\n * @param v The sample value\n */\n add(v) {\n //http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance\n let delta;\n //we need to check if we've already wrapped round\n if (this.isSaturated()) {\n //remove bottom of stack from mean\n const bottomValue = this._samples[this._pos];\n delta = bottomValue - this.average;\n this.average -= delta / (this._sampleCount - 1);\n this._m2 -= delta * (bottomValue - this.average);\n } else {\n this._sampleCount++;\n }\n //add new value to mean\n delta = v - this.average;\n this.average += delta / this._sampleCount;\n this._m2 += delta * (v - this.average);\n //set the new variance\n this.variance = this._m2 / (this._sampleCount - 1);\n this._samples[this._pos] = v;\n this._pos++;\n this._pos %= this._samples.length; //positive wrap around\n }\n /**\n * Returns previously added values or null if outside of history or outside the sliding window domain\n * @param i Index in history. For example, pass 0 for the most recent value and 1 for the value before that\n * @returns Value previously recorded with add() or null if outside of range\n */\n history(i) {\n if (i >= this._sampleCount || i >= this._samples.length) {\n return 0;\n }\n const i0 = this._wrapPosition(this._pos - 1.0);\n return this._samples[this._wrapPosition(i0 - i)];\n }\n /**\n * Returns true if enough samples have been taken to completely fill the sliding window\n * @returns true if sample-set saturated\n */\n isSaturated() {\n return this._sampleCount >= this._samples.length;\n }\n /**\n * Resets the rolling average (equivalent to 0 samples taken so far)\n */\n reset() {\n this.average = 0;\n this.variance = 0;\n this._sampleCount = 0;\n this._pos = 0;\n this._m2 = 0;\n }\n /**\n * Wraps a value around the sample range boundaries\n * @param i Position in sample range, for example if the sample length is 5, and i is -3, then 2 will be returned.\n * @returns Wrapped position in sample range\n */\n _wrapPosition(i) {\n const max = this._samples.length;\n return (i % max + max) % max;\n }\n}","map":{"version":3,"names":["PrecisionDate","PerformanceMonitor","constructor","frameSampleSize","_enabled","_rollingFrameTime","RollingAverage","sampleFrame","timeMs","Now","_lastFrameTimeMs","dt","add","averageFrameTime","average","averageFrameTimeVariance","variance","instantaneousFrameTime","history","averageFPS","instantaneousFPS","isSaturated","enable","disable","isEnabled","reset","length","_samples","Array","v","delta","bottomValue","_pos","_sampleCount","_m2","i","i0","_wrapPosition","max"],"sources":["F:/workspace/202226701027/huinongbao-app/node_modules/@babylonjs/core/Misc/performanceMonitor.js"],"sourcesContent":["import { PrecisionDate } from \"./precisionDate.js\";\n/**\n * Performance monitor tracks rolling average frame-time and frame-time variance over a user defined sliding-window\n */\nexport class PerformanceMonitor {\n /**\n * constructor\n * @param frameSampleSize The number of samples required to saturate the sliding window\n */\n constructor(frameSampleSize = 30) {\n this._enabled = true;\n this._rollingFrameTime = new RollingAverage(frameSampleSize);\n }\n /**\n * Samples current frame\n * @param timeMs A timestamp in milliseconds of the current frame to compare with other frames\n */\n sampleFrame(timeMs = PrecisionDate.Now) {\n if (!this._enabled) {\n return;\n }\n if (this._lastFrameTimeMs != null) {\n const dt = timeMs - this._lastFrameTimeMs;\n this._rollingFrameTime.add(dt);\n }\n this._lastFrameTimeMs = timeMs;\n }\n /**\n * Returns the average frame time in milliseconds over the sliding window (or the subset of frames sampled so far)\n */\n get averageFrameTime() {\n return this._rollingFrameTime.average;\n }\n /**\n * Returns the variance frame time in milliseconds over the sliding window (or the subset of frames sampled so far)\n */\n get averageFrameTimeVariance() {\n return this._rollingFrameTime.variance;\n }\n /**\n * Returns the frame time of the most recent frame\n */\n get instantaneousFrameTime() {\n return this._rollingFrameTime.history(0);\n }\n /**\n * Returns the average framerate in frames per second over the sliding window (or the subset of frames sampled so far)\n */\n get averageFPS() {\n return 1000.0 / this._rollingFrameTime.average;\n }\n /**\n * Returns the average framerate in frames per second using the most recent frame time\n */\n get instantaneousFPS() {\n const history = this._rollingFrameTime.history(0);\n if (history === 0) {\n return 0;\n }\n return 1000.0 / history;\n }\n /**\n * Returns true if enough samples have been taken to completely fill the sliding window\n */\n get isSaturated() {\n return this._rollingFrameTime.isSaturated();\n }\n /**\n * Enables contributions to the sliding window sample set\n */\n enable() {\n this._enabled = true;\n }\n /**\n * Disables contributions to the sliding window sample set\n * Samples will not be interpolated over the disabled period\n */\n disable() {\n this._enabled = false;\n //clear last sample to avoid interpolating over the disabled period when next enabled\n this._lastFrameTimeMs = null;\n }\n /**\n * Returns true if sampling is enabled\n */\n get isEnabled() {\n return this._enabled;\n }\n /**\n * Resets performance monitor\n */\n reset() {\n //clear last sample to avoid interpolating over the disabled period when next enabled\n this._lastFrameTimeMs = null;\n //wipe record\n this._rollingFrameTime.reset();\n }\n}\n/**\n * RollingAverage\n *\n * Utility to efficiently compute the rolling average and variance over a sliding window of samples\n */\nexport class RollingAverage {\n /**\n * constructor\n * @param length The number of samples required to saturate the sliding window\n */\n constructor(length) {\n this._samples = new Array(length);\n this.reset();\n }\n /**\n * Adds a sample to the sample set\n * @param v The sample value\n */\n add(v) {\n //http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance\n let delta;\n //we need to check if we've already wrapped round\n if (this.isSaturated()) {\n //remove bottom of stack from mean\n const bottomValue = this._samples[this._pos];\n delta = bottomValue - this.average;\n this.average -= delta / (this._sampleCount - 1);\n this._m2 -= delta * (bottomValue - this.average);\n }\n else {\n this._sampleCount++;\n }\n //add new value to mean\n delta = v - this.average;\n this.average += delta / this._sampleCount;\n this._m2 += delta * (v - this.average);\n //set the new variance\n this.variance = this._m2 / (this._sampleCount - 1);\n this._samples[this._pos] = v;\n this._pos++;\n this._pos %= this._samples.length; //positive wrap around\n }\n /**\n * Returns previously added values or null if outside of history or outside the sliding window domain\n * @param i Index in history. For example, pass 0 for the most recent value and 1 for the value before that\n * @returns Value previously recorded with add() or null if outside of range\n */\n history(i) {\n if (i >= this._sampleCount || i >= this._samples.length) {\n return 0;\n }\n const i0 = this._wrapPosition(this._pos - 1.0);\n return this._samples[this._wrapPosition(i0 - i)];\n }\n /**\n * Returns true if enough samples have been taken to completely fill the sliding window\n * @returns true if sample-set saturated\n */\n isSaturated() {\n return this._sampleCount >= this._samples.length;\n }\n /**\n * Resets the rolling average (equivalent to 0 samples taken so far)\n */\n reset() {\n this.average = 0;\n this.variance = 0;\n this._sampleCount = 0;\n this._pos = 0;\n this._m2 = 0;\n }\n /**\n * Wraps a value around the sample range boundaries\n * @param i Position in sample range, for example if the sample length is 5, and i is -3, then 2 will be returned.\n * @returns Wrapped position in sample range\n */\n _wrapPosition(i) {\n const max = this._samples.length;\n return ((i % max) + max) % max;\n }\n}\n"],"mappings":"AAAA,SAASA,aAAa,QAAQ,oBAAoB;AAClD;AACA;AACA;AACA,OAAO,MAAMC,kBAAkB,CAAC;EAC5B;AACJ;AACA;AACA;EACIC,WAAWA,CAACC,eAAe,GAAG,EAAE,EAAE;IAC9B,IAAI,CAACC,QAAQ,GAAG,IAAI;IACpB,IAAI,CAACC,iBAAiB,GAAG,IAAIC,cAAc,CAACH,eAAe,CAAC;EAChE;EACA;AACJ;AACA;AACA;EACII,WAAWA,CAACC,MAAM,GAAGR,aAAa,CAACS,GAAG,EAAE;IACpC,IAAI,CAAC,IAAI,CAACL,QAAQ,EAAE;MAChB;IACJ;IACA,IAAI,IAAI,CAACM,gBAAgB,IAAI,IAAI,EAAE;MAC/B,MAAMC,EAAE,GAAGH,MAAM,GAAG,IAAI,CAACE,gBAAgB;MACzC,IAAI,CAACL,iBAAiB,CAACO,GAAG,CAACD,EAAE,CAAC;IAClC;IACA,IAAI,CAACD,gBAAgB,GAAGF,MAAM;EAClC;EACA;AACJ;AACA;EACI,IAAIK,gBAAgBA,CAAA,EAAG;IACnB,OAAO,IAAI,CAACR,iBAAiB,CAACS,OAAO;EACzC;EACA;AACJ;AACA;EACI,IAAIC,wBAAwBA,CAAA,EAAG;IAC3B,OAAO,IAAI,CAACV,iBAAiB,CAACW,QAAQ;EAC1C;EACA;AACJ;AACA;EACI,IAAIC,sBAAsBA,CAAA,EAAG;IACzB,OAAO,IAAI,CAACZ,iBAAiB,CAACa,OAAO,CAAC,CAAC,CAAC;EAC5C;EACA;AACJ;AACA;EACI,IAAIC,UAAUA,CAAA,EAAG;IACb,OAAO,MAAM,GAAG,IAAI,CAACd,iBAAiB,CAACS,OAAO;EAClD;EACA;AACJ;AACA;EACI,IAAIM,gBAAgBA,CAAA,EAAG;IACnB,MAAMF,OAAO,GAAG,IAAI,CAACb,iBAAiB,CAACa,OAAO,CAAC,CAAC,CAAC;IACjD,IAAIA,OAAO,KAAK,CAAC,EAAE;MACf,OAAO,CAAC;IACZ;IACA,OAAO,MAAM,GAAGA,OAAO;EAC3B;EACA;AACJ;AACA;EACI,IAAIG,WAAWA,CAAA,EAAG;IACd,OAAO,IAAI,CAAChB,iBAAiB,CAACgB,WAAW,CAAC,CAAC;EAC/C;EACA;AACJ;AACA;EACIC,MAAMA,CAAA,EAAG;IACL,IAAI,CAAClB,QAAQ,GAAG,IAAI;EACxB;EACA;AACJ;AACA;AACA;EACImB,OAAOA,CAAA,EAAG;IACN,IAAI,CAACnB,QAAQ,GAAG,KAAK;IACrB;IACA,IAAI,CAACM,gBAAgB,GAAG,IAAI;EAChC;EACA;AACJ;AACA;EACI,IAAIc,SAASA,CAAA,EAAG;IACZ,OAAO,IAAI,CAACpB,QAAQ;EACxB;EACA;AACJ;AACA;EACIqB,KAAKA,CAAA,EAAG;IACJ;IACA,IAAI,CAACf,gBAAgB,GAAG,IAAI;IAC5B;IACA,IAAI,CAACL,iBAAiB,CAACoB,KAAK,CAAC,CAAC;EAClC;AACJ;AACA;AACA;AACA;AACA;AACA;AACA,OAAO,MAAMnB,cAAc,CAAC;EACxB;AACJ;AACA;AACA;EACIJ,WAAWA,CAACwB,MAAM,EAAE;IAChB,IAAI,CAACC,QAAQ,GAAG,IAAIC,KAAK,CAACF,MAAM,CAAC;IACjC,IAAI,CAACD,KAAK,CAAC,CAAC;EAChB;EACA;AACJ;AACA;AACA;EACIb,GAAGA,CAACiB,CAAC,EAAE;IACH;IACA,IAAIC,KAAK;IACT;IACA,IAAI,IAAI,CAACT,WAAW,CAAC,CAAC,EAAE;MACpB;MACA,MAAMU,WAAW,GAAG,IAAI,CAACJ,QAAQ,CAAC,IAAI,CAACK,IAAI,CAAC;MAC5CF,KAAK,GAAGC,WAAW,GAAG,IAAI,CAACjB,OAAO;MAClC,IAAI,CAACA,OAAO,IAAIgB,KAAK,IAAI,IAAI,CAACG,YAAY,GAAG,CAAC,CAAC;MAC/C,IAAI,CAACC,GAAG,IAAIJ,KAAK,IAAIC,WAAW,GAAG,IAAI,CAACjB,OAAO,CAAC;IACpD,CAAC,MACI;MACD,IAAI,CAACmB,YAAY,EAAE;IACvB;IACA;IACAH,KAAK,GAAGD,CAAC,GAAG,IAAI,CAACf,OAAO;IACxB,IAAI,CAACA,OAAO,IAAIgB,KAAK,GAAG,IAAI,CAACG,YAAY;IACzC,IAAI,CAACC,GAAG,IAAIJ,KAAK,IAAID,CAAC,GAAG,IAAI,CAACf,OAAO,CAAC;IACtC;IACA,IAAI,CAACE,QAAQ,GAAG,IAAI,CAACkB,GAAG,IAAI,IAAI,CAACD,YAAY,GAAG,CAAC,CAAC;IAClD,IAAI,CAACN,QAAQ,CAAC,IAAI,CAACK,IAAI,CAAC,GAAGH,CAAC;IAC5B,IAAI,CAACG,IAAI,EAAE;IACX,IAAI,CAACA,IAAI,IAAI,IAAI,CAACL,QAAQ,CAACD,MAAM,CAAC,CAAC;EACvC;EACA;AACJ;AACA;AACA;AACA;EACIR,OAAOA,CAACiB,CAAC,EAAE;IACP,IAAIA,CAAC,IAAI,IAAI,CAACF,YAAY,IAAIE,CAAC,IAAI,IAAI,CAACR,QAAQ,CAACD,MAAM,EAAE;MACrD,OAAO,CAAC;IACZ;IACA,MAAMU,EAAE,GAAG,IAAI,CAACC,aAAa,CAAC,IAAI,CAACL,IAAI,GAAG,GAAG,CAAC;IAC9C,OAAO,IAAI,CAACL,QAAQ,CAAC,IAAI,CAACU,aAAa,CAACD,EAAE,GAAGD,CAAC,CAAC,CAAC;EACpD;EACA;AACJ;AACA;AACA;EACId,WAAWA,CAAA,EAAG;IACV,OAAO,IAAI,CAACY,YAAY,IAAI,IAAI,CAACN,QAAQ,CAACD,MAAM;EACpD;EACA;AACJ;AACA;EACID,KAAKA,CAAA,EAAG;IACJ,IAAI,CAACX,OAAO,GAAG,CAAC;IAChB,IAAI,CAACE,QAAQ,GAAG,CAAC;IACjB,IAAI,CAACiB,YAAY,GAAG,CAAC;IACrB,IAAI,CAACD,IAAI,GAAG,CAAC;IACb,IAAI,CAACE,GAAG,GAAG,CAAC;EAChB;EACA;AACJ;AACA;AACA;AACA;EACIG,aAAaA,CAACF,CAAC,EAAE;IACb,MAAMG,GAAG,GAAG,IAAI,CAACX,QAAQ,CAACD,MAAM;IAChC,OAAO,CAAES,CAAC,GAAGG,GAAG,GAAIA,GAAG,IAAIA,GAAG;EAClC;AACJ","ignoreList":[]},"metadata":{},"sourceType":"module","externalDependencies":[]}
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