148 lines
6.4 KiB
JavaScript
148 lines
6.4 KiB
JavaScript
/**
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* LogarithmPlotter - 2D plotter software to make BODE plots, sequences and distribution functions.
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* Copyright (C) 2021-2024 Ad5001
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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import { parseDomain, executeExpression, Expression, EmptySet, Domain } from "../mathlib.mjs"
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import * as P from "../parameters.mjs"
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import Objects from "../objects.mjs"
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import Latex from "../math/latex.mjs"
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import { API as Common, ExecutableObject } from "common.mjs"
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import Function from "function.mjs"
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import { API as HistoryAPI } from "../history/common.mjs"
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import { CreateNewObject } from "../historylib.mjs"
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export default class GainBode extends ExecutableObject {
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static type(){return 'Gain Bode'}
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static displayType(){return qsTr('Bode Magnitude')}
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static displayTypeMultiple(){return qsTr('Bode Magnitudes')}
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static properties() {return {
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[QT_TRANSLATE_NOOP('prop','om_0')]: new P.ObjectType('Point'),
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[QT_TRANSLATE_NOOP('prop','pass')]: P.Enum.BodePass,
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[QT_TRANSLATE_NOOP('prop','gain')]: new P.Expression(),
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[QT_TRANSLATE_NOOP('prop','labelPosition')]: P.Enum.Position,
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[QT_TRANSLATE_NOOP('prop','labelX')]: 'number',
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[QT_TRANSLATE_NOOP('prop','omGraduation')]: 'boolean'
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}}
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constructor(name = null, visible = true, color = null, labelContent = 'name + value',
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om_0 = '', pass = 'high', gain = '20', labelPosition = 'above', labelX = 1, omGraduation = false) {
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if(name == null) name = Common.getNewName('G')
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if(name === 'G') name = 'G₀' // G is reserved for sum of BODE magnitudes (Somme gains Bode).
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super(name, visible, color, labelContent)
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if(typeof om_0 == "string") {
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// Point name or create one
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om_0 = Objects.currentObjectsByName[om_0]
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if(om_0 == null) {
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// Create new point
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om_0 = Objects.createNewRegisteredObject('Point', [Common.getNewName('ω'), true, this.color, 'name'])
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HistoryAPI.addToHistory(new CreateNewObject(om_0.name, 'Point', om_0.export()))
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om_0.update()
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labelPosition = 'below'
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}
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om_0.requiredBy.push(this)
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}
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/** @type {Point} */
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this.om_0 = om_0
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this.pass = pass
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if(typeof gain == 'number' || typeof gain == 'string') gain = new Expression(gain.toString())
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this.gain = gain
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this.labelPosition = labelPosition
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this.labelX = labelX
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this.omGraduation = omGraduation
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}
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getReadableString() {
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let pass = this.pass === "low" ? qsTr("low-pass") : qsTr("high-pass");
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return `${this.name}: ${pass}; ${this.om_0.name} = ${this.om_0.x}\n ${' '.repeat(this.name.length)}${this.gain.toString(true)} dB/dec`
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}
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getLatexString() {
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let pass = this.pass === "low" ? qsTr("low-pass") : qsTr("high-pass");
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return `\\mathrm{${Latex.variable(this.name)}:}\\begin{array}{l}
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\\textsf{${pass}};${Latex.variable(this.om_0.name)} = ${this.om_0.x.latexMarkup} \\\\
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${this.gain.latexMarkup}\\textsf{ dB/dec}
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\\end{array}`
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}
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export() {
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return [this.name, this.visible, this.color.toString(), this.labelContent,
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this.om_0.name, this.pass.toString(), this.gain.toEditableString(), this.labelPosition, this.labelX, this.omGraduation]
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}
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execute(x=1) {
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if(typeof x == 'string') x = executeExpression(x)
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if((this.pass === 'high' && x < this.om_0.x) || (this.pass === 'low' && x > this.om_0.x)) {
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let dbfn = new Expression(`${this.gain.execute()}*(ln(x)-ln(${this.om_0.x}))/ln(10)+${this.om_0.y}`)
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return dbfn.execute(x)
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} else {
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return this.om_0.y.execute()
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}
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}
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simplify(x = 1) {
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let xval = x
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if(typeof x == 'string') xval = executeExpression(x)
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if((this.pass === 'high' && xval < this.om_0.x.execute()) || (this.pass === 'low' && xval > this.om_0.x.execute())) {
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let dbfn = new Expression(`${this.gain.execute()}*(ln(x)-ln(${this.om_0.x}))/ln(10)+${this.om_0.y}`)
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return dbfn.simplify(x)
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} else {
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return this.om_0.y.toString()
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}
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}
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canExecute(x = 1) {
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return true
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}
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draw(canvas) {
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let base = [canvas.x2px(this.om_0.x.execute()), canvas.y2px(this.om_0.y.execute())]
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let dbfn = new Expression(`${this.gain.execute()}*(log10(x)-log10(${this.om_0.x}))+${this.om_0.y}`)
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let inDrawDom = new EmptySet()
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if(this.pass === 'high') {
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// High pass, linear line from beginning, then constant to the end.
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canvas.drawLine(base[0], base[1], canvas.width, base[1])
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inDrawDom = parseDomain(`]-inf;${this.om_0.x}[`)
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} else {
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// Low pass, constant from the beginning, linear line to the end.
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canvas.drawLine(base[0], base[1], 0, base[1])
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inDrawDom = parseDomain(`]${this.om_0.x};+inf[`)
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}
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Function.drawFunction(canvas, dbfn, inDrawDom, Domain.R)
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// Dashed line representing break in function
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let xpos = canvas.x2px(this.om_0.x.execute())
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let dashPxSize = 10
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for(let i = 0; i < canvas.height && this.omGraduation; i += dashPxSize*2)
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canvas.drawLine(xpos, i, xpos, i+dashPxSize)
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// Label
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this.drawLabel(canvas, this.labelPosition, canvas.x2px(this.labelX), canvas.y2px(this.execute(this.labelX)))
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}
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update() {
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super.update()
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if(Objects.currentObjects['Somme gains Bode'] !== undefined && Objects.currentObjects['Somme gains Bode'].length > 0) {
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Objects.currentObjects['Somme gains Bode'][0].recalculateCache()
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} else {
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Objects.createNewRegisteredObject('Somme gains Bode')
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}
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}
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}
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