WIP

media/js/src/GraphEditor.jsx

@@ -18,6 +18,7 @@ import RevenueElasticityEditor from './editors/RevenueElasticityEditor.jsx';
 import OptimalChoiceCostMinimizingEditor from './editors/OptimalChoiceCostMinimizingEditor.jsx';
 import TaxationLinearDemandEditor from './editors/TaxationLinearDemandEditor.jsx';
 import TaxRevenueEditor from './editors/TaxRevenueEditor.jsx';
+import NegativeProductionExternalityProducerEditor from './editors/NegativeProductionExternalityProducerEditor.jsx';
 
 import JXGBoard from './JXGBoard.jsx';
 import GraphPane from './GraphPane.jsx';
@@ -330,6 +331,13 @@ export default class GraphEditor extends React.Component {
                     {...commonEditorProps}
                     {...this.props}
                 />;
+        } else if (this.props.gType === 26) {
+            rightSide =
+                <NegativeProductionExternalityProducerEditor
+                    updateGraph={this.props.updateGraph}
+                    {...commonEditorProps}
+                    {...this.props}
+                />;
         }
 
         const hasIntersection = ![

media/js/src/GraphViewer.jsx

@@ -16,6 +16,8 @@ import OptimalChoiceConsumptionEditor from './editors/OptimalChoiceConsumption.j
 import CostFunctionsEditor from './editors/CostFunctionsEditor.jsx';
 import OptimalChoiceCostMinimizingEditor from './editors/OptimalChoiceCostMinimizingEditor.jsx';
 import TaxationLinearDemandEditor from './editors/TaxationLinearDemandEditor.jsx';
+import NegativeProductionExternalityProducerEditor from
+'./editors/NegativeProductionExternalityProducerEditor.jsx';
 
 import ExportGraphButton from './buttons/ExportGraphButton.jsx';
 import ResetGraphButton from './buttons/ResetGraphButton.jsx';
@@ -330,7 +332,14 @@ export default class GraphViewer extends React.Component {
                     {...commonViewerProps}
                     {...this.props}
                 />;
-        }
+        } else if (this.props.gType === 26) {
+            rightSide =
+                <NegativeProductionExternalityProducerEditor
+                    updateGraph={this.props.updateGraph}
+                    {...commonViewerProps}
+                    {...this.props}
+                />;
+        }        
 
         return (
             <div className="GraphViewer">

media/js/src/JXGBoard.jsx

@@ -570,6 +570,18 @@ export default class JXGBoard extends React.Component {
                 xTicks = this.visibleTicks;
                 yTicks = xTicks;
                 break;
+            case 26:
+                xTicks = this.visibleTicks;
+                yTicks = xTicks;
+                break;
+            case 28:
+                xTicks = this.visibleTicks;
+                yTicks = xTicks;
+                break;
+            case 27:
+                xTicks = this.visibleTicks;
+                yTicks = xTicks;
+                break;
             default:
                 xAxisLabel = options.gXAxisLabel ? options.gXAxisLabel : 'x';
                 yAxisLabel = options.gYAxisLabel ? options.gYAxisLabel : 'y';

media/js/src/editors/NegativeProductionExternalityProducerEditor.jsx

@@ -0,0 +1,137 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import RangeEditor from '../form-components/RangeEditor.jsx';
+import { handleFormUpdate } from '../utils.js';
+
+export default class NegativeProductionExternalityProducerEditor extends React.Component {
+    render() {
+        const me = this;
+
+        const modesLeft = [
+            'Negative Producer Externality',
+            'Unregulated',
+            'Welfare',
+        ];
+        const modesRight = [
+            'Pigouvian Tax',
+            'Pigouvian Tax (Welfare)',
+        ];
+
+        const radioButtons1 = modesLeft.map((optionTitle, idx) =>
+            <div key={idx} className="form-check">
+                <input
+                    type="radio" id={`functionChoice-${idx}`}
+                    className="form-check-input"
+                    value={idx}
+                    name="gFunctionChoice"
+                    checked={me.props.gFunctionChoice === idx}
+                    onChange={handleFormUpdate.bind(me)} />
+                <label
+                    className="form-check-label"
+                    htmlFor={`functionChoice-${idx}`}>
+                    {optionTitle}
+                </label>
+            </div>
+        );
+
+        const radioButtons2 = modesRight.map(function(optionTitle, idx) {
+            const newIdx = idx + modesLeft.length;
+            return (
+                <div key={newIdx} className="form-check">
+                    <input
+                        type="radio" id={`functionChoice-${newIdx}`}
+                        className="form-check-input"
+                        value={newIdx}
+                        name="gFunctionChoice"
+                        checked={me.props.gFunctionChoice === newIdx}
+                        onChange={handleFormUpdate.bind(me)} />
+                    <label
+                        className="form-check-label"
+                        htmlFor={`functionChoice-${newIdx}`}>
+                        {optionTitle}
+                    </label>
+                </div>
+            );
+        });
+
+        return (
+            <>
+                <div className="row">
+                    <div className="col">
+                        {radioButtons1}
+                    </div>
+                    <div className="col">
+                        {radioButtons2}
+                    </div>
+                </div>
+
+                <div>
+                    {this.props.displaySliders && (
+                        <>
+                            <RangeEditor
+                                label="MB Constant"
+                                rawLabel={true}
+                                id="gA1"
+                                value={this.props.gA1}
+                                min={0}
+                                max={10000}
+                                handler={handleFormUpdate.bind(this)} />
+
+                            <RangeEditor
+                                label="MC Constant"
+                                rawLabel={true}
+                                id="gA2"
+                                value={this.props.gA2}
+                                min={0}
+                                max={10000}
+                                handler={handleFormUpdate.bind(this)} />
+
+                            <RangeEditor
+                                label="MC Slope"
+                                rawLabel={true}
+                                id="gA3"
+                                value={this.props.gA3}
+                                min={0.01}
+                                max={35}
+                                handler={handleFormUpdate.bind(this)} />
+
+                            <RangeEditor
+                                label="EMC Constant"
+                                rawLabel={true}
+                                id="gA4"
+                                value={this.props.gA4}
+                                min={0}
+                                max={10000}
+                                handler={handleFormUpdate.bind(this)} />
+
+                            <RangeEditor
+                                label="EMC Slope"
+                                rawLabel={true}
+                                id="gA5"
+                                value={this.props.gA5}
+                                min={0.0}
+                                max={35}
+                                handler={handleFormUpdate.bind(this)} />
+                        </>
+                    )}
+                </div>
+            </>
+        );
+    }
+}
+
+NegativeProductionExternalityProducerEditor.propTypes = {
+    gType: PropTypes.number.isRequired,
+
+    gA1: PropTypes.number.isRequired,
+    gA2: PropTypes.number.isRequired,
+    gA3: PropTypes.number.isRequired,
+    gA4: PropTypes.number.isRequired,
+    gA5: PropTypes.number.isRequired,
+    gA6: PropTypes.number,
+
+    gFunctionChoice: PropTypes.number.isRequired,
+    gToggle: PropTypes.bool.isRequired,
+
+    displaySliders: PropTypes.bool.isRequired
+};

media/js/src/graphUtils.js

@@ -15,6 +15,9 @@ import {
 import {
     defaults as cobbDouglasDefaults
 } from './graphs/CobbDouglasGraph.js';
+import {
+    defaults as externalitiesDefaults
+} from './graphs/NegativeProductionExternalityProducerGraph.js';
 
 /**
  * Set defaults to the given state update object based on toggle and
@@ -130,6 +133,8 @@ export const getDefaultGraphState = function(graphType, state) {
         });
     } else if (graphType === 25) {
         Object.assign(state, linearDemandSupplySurplusDefaults[0]);
+    } else if (graphType >= 26 && graphType <= 28) {
+        Object.assign(state, externalitiesDefaults[0]);
     }
 
     return state;

media/js/src/graphs/NegativeProductionExternalityProducerGraph.js

@@ -1,6 +1,105 @@
-import {Graph} from './Graph.js';
+import {Graph, positiveRange} from './Graph.js';
+
+export const defaults = [
+    {
+        gXAxisMax: 1000,
+        gYAxisMax: 2500,
+        gA1: 500,
+        gA2: 2,
+        gA3: 50,
+        gA4: 2,
+    }
+];
+
+// Marginal Benefit
+const mb = function(a) {
+    return a;
+};
+
+const mc = function(c, d, q) {
+    return c + d * q;
+};
+
+// External Marginal Cost
+const emc = function(f, g, q) {
+    return f + g * q;
+};
+
+const pemc = function(f, g, p) {
+    return (p - f) / g;
+};
+
+
+// Social Marginal Cost
+const smc = function(c, d, f, g, q) {
+    return mc(c, d, q) + emc(f, g, q);
+};
+
+const psmc = function(c, d, f, g, p) {
+    return (p - c - f) / (d + g);
+};
 
 export class NegativeProductionExternalityProducerGraph extends Graph {
+    static getGraphPane(gFunctionChoice) {
+        return [
+            {
+                label: 'Unregulated Output q*',
+                color: 'red',
+                value: 500
+            },
+            {
+                label: 'Socially Desirable Output q<sup>soc</sup>',
+                color: 'orange',
+                value: 247.5
+            },
+            {
+                label: 'Market Price P*',
+                color: 'red',
+                value: 1500
+            },
+        ];
+    }
+    make() {
+        const me = this;
+
+        const mbLine = function() {
+            return mb(me.options.gA1);
+        };
+
+        this.l1 = this.board.create(
+            'functiongraph',
+            [positiveRange(mbLine), 0, this.options.gXAxisMax], {
+                name: 'MB',
+                withLabel: true,
+                label: {
+                    strokeColor: this.l1Color
+                },
+                strokeWidth: 2,
+                strokeColor: this.l1Color,
+                fixed: true,
+                highlight: false
+            }
+        );
+
+        const mcLine = function(c, d, x) {
+            return mc(me.options.gA2, me.options.gA3, x);
+        };
+
+        this.l2 = this.board.create(
+            'functiongraph',
+            [positiveRange(mcLine), 0, this.options.gXAxisMax], {
+                name: 'MC',
+                withLabel: true,
+                label: {
+                    strokeColor: this.l2Color
+                },
+                strokeWidth: 2,
+                strokeColor: this.l2Color,
+                fixed: true,
+                highlight: false
+            }
+        );
+    }
 }
 
 export const mkNegativeProductionExternalityProducer = function(board, options) {