177 lines
7.6 KiB
JavaScript
177 lines
7.6 KiB
JavaScript
/**
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* LogarithmPlotter - 2D plotter software to make BODE plots, sequences and distribution functions.
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* Copyright (C) 2022 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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.pragma library
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.import "common.js" as Common
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.import "function.js" as F
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.import "../objects.js" as Objects
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.import "../utils.js" as Utils
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.import "../mathlib.js" as MathLib
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.import "../historylib.js" as HistoryLib
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.import "../parameters.js" as P
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class GainBode extends Common.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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'om_0': new P.ObjectType('Point'),
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'pass': new P.Enum('high', 'low'),
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'gain': 'Expression',
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'labelPosition': new P.Enum('above', 'below', 'left', 'right', 'above-left', 'above-right', 'below-left', 'below-right'),
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'labelX': 'number',
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'omGraduation': 'boolean'
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}}*/
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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')]: '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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this.type = 'Gain Bode'
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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.getObjectByName(om_0, 'Point')
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if(om_0 == null) {
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// Create new point
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om_0 = Objects.createNewRegisteredObject('Point')
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om_0.name = Common.getNewName('ω')
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om_0.labelContent = 'name'
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om_0.color = this.color
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HistoryLib.history.addToHistory(new HistoryLib.CreateNewObject(om_0.name, 'Point', om_0.export()))
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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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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 MathLib.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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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 = MathLib.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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var dbfn = new MathLib.Expression(`${this.gain.execute()}*(ln(x)-ln(${this.om_0.x}))/ln(10)+${this.om_0.y}`)
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return dbfn.execute(x)
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} else {
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return this.om_0.y.execute()
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}
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}
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simplify(x = 1) {
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var xval = x
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if(typeof x == 'string') xval = MathLib.executeExpression(x)
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if((this.pass == 'high' && xval < this.om_0.x) || (this.pass == 'low' && xval > this.om_0.x)) {
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var dbfn = new MathLib.Expression(`${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, ctx) {
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var base = [canvas.x2px(this.om_0.x), canvas.y2px(this.om_0.y)]
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var dbfn = new MathLib.Expression(`${this.gain.execute()}*(ln(x)-ln(${this.om_0.x}))/ln(10)+${this.om_0.y}`)
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var inDrawDom = new MathLib.EmptySet()
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if(this.pass == 'high') {
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// High pass, linear line from begining, then constant to the end.
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canvas.drawLine(ctx, base[0], base[1], canvas.canvasSize.width, base[1])
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inDrawDom = MathLib.parseDomain(`]-inf;${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(ctx, base[0], base[1], 0, base[1])
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inDrawDom = MathLib.parseDomain(`]${this.om_0.x};+inf[`)
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}
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F.Function.drawFunction(canvas, ctx, dbfn, inDrawDom, MathLib.Domain.R)
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// Dashed line representing break in function
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var xpos = canvas.x2px(this.om_0.x.execute())
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var dashPxSize = 10
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for(var i = 0; i < canvas.canvasSize.height && this.omGraduation; i += dashPxSize*2)
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canvas.drawLine(ctx, xpos, i, xpos, i+dashPxSize)
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// Label
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var text = this.getLabel()
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ctx.font = `${canvas.textsize}px sans-serif`
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var textSize = canvas.measureText(ctx, text)
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var posX = canvas.x2px(this.labelX)
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var posY = canvas.y2px(this.execute(this.labelX))
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switch(this.labelPosition) {
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case 'above':
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canvas.drawVisibleText(ctx, text, posX-textSize.width/2, posY-textSize.height)
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break;
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case 'below':
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canvas.drawVisibleText(ctx, text, posX-textSize.width/2, posY+textSize.height)
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break;
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case 'left':
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canvas.drawVisibleText(ctx, text, posX-textSize.width, posY-textSize.height/2)
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break;
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case 'right':
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canvas.drawVisibleText(ctx, text, posX, posY-textSize.height/2)
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break;
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case 'above-left':
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canvas.drawVisibleText(ctx, text, posX-textSize.width, posY-textSize.height)
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break;
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case 'above-right':
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canvas.drawVisibleText(ctx, text, posX, posY-textSize.height)
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break;
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case 'below-left':
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canvas.drawVisibleText(ctx, text, posX-textSize.width, posY+textSize.height)
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break;
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case 'below-right':
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canvas.drawVisibleText(ctx, text, posX, posY+textSize.height)
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break;
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}
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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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