Render self connections and wavy lines in vaguely sketch style [#18]

lib/sequence-diagram.js

@@ -3104,7 +3104,130 @@ define('svg/SVGTextBlock',['./SVGUtilities'], (svg) => {
 	return SVGTextBlock;
 });
 
-define('svg/SVGShapes',['./SVGUtilities', './SVGTextBlock'], (svg, SVGTextBlock) => {
+define('svg/PatternedLine',[],() => {
+	'use strict';
+
+	return class PatternedLine {
+		constructor(pattern = null, phase = 0) {
+			this.pattern = pattern;
+			this.dw = pattern && pattern.partWidth;
+			this.points = [];
+			this.phase = phase;
+			this.x = null;
+			this.y = null;
+			this.disconnect = 0;
+		}
+
+		_nextDelta() {
+			return this.pattern.getDelta(this.phase ++);
+		}
+
+		_link() {
+			if(this.disconnect === 2) {
+				this.points.push(this.x + ' ' + this.y);
+				this.disconnect = 0;
+			}
+		}
+
+		cap() {
+			if(this.disconnect > 0) {
+				this.points.push(this.x + ' ' + this.y);
+				this.disconnect = 0;
+			}
+			return this;
+		}
+
+		move(x, y) {
+			this.cap();
+			this.x = x;
+			this.y = y;
+			this.disconnect = 2;
+			return this;
+		}
+
+		line(x, y) {
+			if(this.pattern) {
+				const len = Math.sqrt(
+					(x - this.x) * (x - this.x) +
+					(y - this.y) * (y - this.y)
+				);
+				const dx1 = (x - this.x) / len;
+				const dy1 = (y - this.y) / len;
+				const dx2 = -dy1;
+				const dy2 = dx1;
+
+				for(let pos = 0; pos + this.dw <= len; pos += this.dw) {
+					const delta = this._nextDelta();
+					this.points.push(
+						(this.x + pos * dx1 + delta * dx2) + ' ' +
+						(this.y + pos * dy1 + delta * dy2)
+					);
+				}
+				this.disconnect = 1;
+			} else {
+				this._link();
+				this.disconnect = 2;
+			}
+
+			this.x = x;
+			this.y = y;
+			return this;
+		}
+
+		arc(cx, cy, theta) {
+			const radius = Math.sqrt(
+				(cx - this.x) * (cx - this.x) +
+				(cy - this.y) * (cy - this.y)
+			);
+			const theta1 = Math.atan2(cx - this.x, cy - this.y);
+			const nextX = cx + Math.sin(theta1 + theta) * radius;
+			const nextY = cy - Math.cos(theta1 + theta) * radius;
+
+			if(this.pattern) {
+				const dir = (theta < 0 ? 1 : -1);
+				const dt = this.dw / radius;
+
+				for(let t = theta1; t + dt <= theta1 + theta; t += dt) {
+					const delta = this._nextDelta() * dir;
+					this.points.push(
+						(cx + Math.sin(t) * (radius + delta)) + ' ' +
+						(cy - Math.cos(t) * (radius + delta))
+					);
+				}
+				this.disconnect = 1;
+			} else {
+				this.points.push(
+					this.x + ' ' + this.y +
+					'A' + radius + ' ' + radius + ' 0 ' +
+					((theta < 0) ? '0 ' : '1 ') +
+					'1 ' +
+					nextX + ' ' + nextY
+				);
+				this.disconnect = 0;
+			}
+
+			this.x = nextX;
+			this.y = nextY;
+
+			return this;
+		}
+
+		asPath() {
+			this._link();
+			return 'M' + this.points.join('L');
+		}
+	};
+});
+
+define('svg/SVGShapes',[
+	'./SVGUtilities',
+	'./SVGTextBlock',
+	'./PatternedLine',
+], (
+	svg,
+	SVGTextBlock,
+	PatternedLine
+) => {
 	'use strict';
 
 	function renderBox(attrs, position) {
@@ -3218,6 +3341,7 @@ define('svg/SVGShapes',['./SVGUtilities', './SVGTextBlock'], (svg, SVGTextBlock)
 		renderNote,
 		renderBoxedText,
 		TextBlock: SVGTextBlock,
+		PatternedLine,
 	};
 });
 
@@ -5218,122 +5342,13 @@ define('sequence/Exporter',[],() => {
 	};
 });
 
-define('svg/PatternedLine',[],() => {
+define('sequence/themes/BaseTheme',[
-	'use strict';
+	'svg/SVGUtilities',
-
+	'svg/SVGShapes',
-	return class PatternedLine {
+], (
-		constructor(pattern = null, phase = 0) {
+	svg,
-			this.pattern = pattern;
+	SVGShapes
-			this.dw = pattern && pattern.partWidth;
+) => {
-			this.points = [];
-			this.phase = phase;
-			this.x = null;
-			this.y = null;
-			this.disconnect = 0;
-		}
-
-		_nextDelta() {
-			return this.pattern.getDelta(this.phase ++);
-		}
-
-		_link() {
-			if(this.disconnect === 2) {
-				this.points.push(this.x + ' ' + this.y);
-				this.disconnect = 0;
-			}
-		}
-
-		cap() {
-			if(this.disconnect > 0) {
-				this.points.push(this.x + ' ' + this.y);
-				this.disconnect = 0;
-			}
-			return this;
-		}
-
-		move(x, y) {
-			this.cap();
-			this.x = x;
-			this.y = y;
-			this.disconnect = 2;
-			return this;
-		}
-
-		line(x, y) {
-			if(this.pattern) {
-				const len = Math.sqrt(
-					(x - this.x) * (x - this.x) +
-					(y - this.y) * (y - this.y)
-				);
-				const dx1 = (x - this.x) / len;
-				const dy1 = (y - this.y) / len;
-				const dx2 = -dy1;
-				const dy2 = dx1;
-
-				for(let pos = 0; pos + this.dw <= len; pos += this.dw) {
-					const delta = this._nextDelta();
-					this.points.push(
-						(this.x + pos * dx1 + delta * dx2) + ' ' +
-						(this.y + pos * dy1 + delta * dy2)
-					);
-				}
-				this.disconnect = 1;
-			} else {
-				this._link();
-				this.disconnect = 2;
-			}
-
-			this.x = x;
-			this.y = y;
-			return this;
-		}
-
-		arc(cx, cy, theta) {
-			const radius = Math.sqrt(
-				(cx - this.x) * (cx - this.x) +
-				(cy - this.y) * (cy - this.y)
-			);
-			const theta1 = Math.atan2(cx - this.x, cy - this.y);
-			const nextX = cx + Math.sin(theta1 + theta) * radius;
-			const nextY = cy - Math.cos(theta1 + theta) * radius;
-
-			if(this.pattern) {
-				const dir = (theta < 0 ? 1 : -1);
-				const dt = this.dw / radius;
-
-				for(let t = theta1; t + dt <= theta1 + theta; t += dt) {
-					const delta = this._nextDelta() * dir;
-					this.points.push(
-						(cx + Math.sin(t) * (radius + delta)) + ' ' +
-						(cy - Math.cos(t) * (radius + delta))
-					);
-				}
-				this.disconnect = 1;
-			} else {
-				this.points.push(
-					this.x + ' ' + this.y +
-					'A' + radius + ' ' + radius + ' 0 ' +
-					((theta < 0) ? '0 ' : '1 ') +
-					'1 ' +
-					nextX + ' ' + nextY
-				);
-				this.disconnect = 0;
-			}
-
-			this.x = nextX;
-			this.y = nextY;
-
-			return this;
-		}
-
-		asPath() {
-			this._link();
-			return 'M' + this.points.join('L');
-		}
-	};
-});
-
-define('sequence/themes/BaseTheme',['svg/SVGUtilities', 'svg/PatternedLine'], (svg, PatternedLine) => {
 	'use strict';
 
 	function deepCopy(o) {
@@ -5446,6 +5461,9 @@ define('sequence/themes/BaseTheme',['svg/SVGUtilities', 'svg/PatternedLine'], (s
 
 	BaseTheme.WavePattern = class WavePattern {
 		constructor(width, height) {
+			if(Array.isArray(height)) {
+				this.deltas = height;
+			} else {
 				this.deltas = [
 					0,
 					-height * 2 / 3,
@@ -5456,6 +5474,7 @@ define('sequence/themes/BaseTheme',['svg/SVGUtilities', 'svg/PatternedLine'], (s
 					height,
 					height * 2 / 3,
 				];
+			}
 			this.partWidth = width / this.deltas.length;
 		}
 
@@ -5467,7 +5486,7 @@ define('sequence/themes/BaseTheme',['svg/SVGUtilities', 'svg/PatternedLine'], (s
 	BaseTheme.renderFlatConnector = (pattern, attrs, {x1, dx1, x2, dx2, y}) => {
 		return {
 			shape: svg.make('path', Object.assign({
-				d: new PatternedLine(pattern)
+				d: new SVGShapes.PatternedLine(pattern)
 					.move(x1 + dx1, y)
 					.line(x2 + dx2, y)
 					.cap()
@@ -5485,7 +5504,7 @@ define('sequence/themes/BaseTheme',['svg/SVGUtilities', 'svg/PatternedLine'], (s
 	) => {
 		return {
 			shape: svg.make('path', Object.assign({
-				d: new PatternedLine(pattern)
+				d: new SVGShapes.PatternedLine(pattern)
 					.move(xL + dx1, y1)
 					.line(xR, y1)
 					.arc(xR, (y1 + y2) / 2, Math.PI)
@@ -6588,8 +6607,6 @@ define('sequence/themes/Sketch',[
 		'stroke-linecap': 'round',
 	};
 
-	const WAVE = new BaseTheme.WavePattern(6, 0.5);
-
 	const SETTINGS = {
 		titleMargin: 10,
 		outerMargin: 5,
@@ -6641,7 +6658,7 @@ define('sequence/themes/Sketch',[
 						'fill': 'none',
 					}, PENCIL),
 					renderFlat: null,
-					renderRev: BaseTheme.renderRevConnector.bind(null, null),
+					renderRev: null,
 				},
 				'dash': {
 					attrs: Object.assign({
@@ -6649,7 +6666,7 @@ define('sequence/themes/Sketch',[
 						'stroke-dasharray': '4, 2',
 					}, PENCIL),
 					renderFlat: null,
-					renderRev: BaseTheme.renderRevConnector.bind(null, null),
+					renderRev: null,
 				},
 				'wave': {
 					attrs: Object.assign({
@@ -6657,8 +6674,8 @@ define('sequence/themes/Sketch',[
 						'stroke-linejoin': 'round',
 						'stroke-linecap': 'round',
 					}, PENCIL),
-					renderFlat: BaseTheme.renderFlatConnector.bind(null, WAVE),
+					renderFlat: null,
-					renderRev: BaseTheme.renderRevConnector.bind(null, WAVE),
+					renderRev: null,
 				},
 			},
 			arrow: {
@@ -6849,6 +6866,31 @@ define('sequence/themes/Sketch',[
 	const RIGHT = {};
 	const LEFT = {};
 
+	class SketchWavePattern extends BaseTheme.WavePattern {
+		constructor(width, handedness) {
+			const heights = [
+				+0.0,
+				-0.3,
+				-0.6,
+				-0.75,
+				-0.45,
+				+0.0,
+				+0.45,
+				+0.75,
+				+0.6,
+				+0.3,
+			];
+			if(handedness !== RIGHT) {
+				heights.reverse();
+			}
+			super(6, heights);
+		}
+
+		getDelta(p) {
+			return super.getDelta(p) + Math.sin(p * 0.03) * 0.5;
+		}
+	}
+
 	class SketchTheme extends BaseTheme {
 		constructor(handedness = RIGHT) {
 			super({
@@ -6866,29 +6908,49 @@ define('sequence/themes/Sketch',[
 				this.handedness = -1;
 			}
 			this.random = new Random();
+			this.wave = new SketchWavePattern(4, handedness);
 
-			this._assignFunctions();
+			this._assignCapFunctions();
+			this._assignConnectFunctions();
+			this._assignNoteFunctions();
+			this._assignBlockFunctions();
 		}
 
-		_assignFunctions() {
+		_assignCapFunctions() {
 			this.renderBar = this.renderBar.bind(this);
 			this.renderBox = this.renderBox.bind(this);
-			this.renderArrowHead = this.renderArrowHead.bind(this);
-			this.renderFlatConnector = this.renderFlatConnector.bind(this);
-			this.renderTag = this.renderTag.bind(this);
 
 			this.agentCap.cross.render = this.renderCross.bind(this);
 			this.agentCap.bar.render = this.renderBar;
 			this.agentCap.box.boxRenderer = this.renderBox;
+		}
+
+		_assignConnectFunctions() {
+			this.renderArrowHead = this.renderArrowHead.bind(this);
+			this.renderFlatConnector = this.renderFlatConnector.bind(this);
+			this.renderRevConnector = this.renderRevConnector.bind(this);
 
 			this.connect.arrow.single.render = this.renderArrowHead;
 			this.connect.arrow.double.render = this.renderArrowHead;
 
 			this.connect.line.solid.renderFlat = this.renderFlatConnector;
+			this.connect.line.solid.renderRev = this.renderRevConnector;
 			this.connect.line.dash.renderFlat = this.renderFlatConnector;
+			this.connect.line.dash.renderRev = this.renderRevConnector;
+			this.connect.line.wave.renderFlat =
+				this.renderFlatConnectorWave.bind(this);
+			this.connect.line.wave.renderRev =
+				this.renderRevConnectorWave.bind(this);
+		}
 
+		_assignNoteFunctions() {
 			this.notes.note.boxRenderer = this.renderNote.bind(this);
 			this.notes.state.boxRenderer = this.renderState.bind(this);
+		}
+
+		_assignBlockFunctions() {
+			this.renderTag = this.renderTag.bind(this);
+
 			this.blocks.ref.boxRenderer = this.renderRefBlock.bind(this);
 			this.blocks[''].boxRenderer = this.renderBlock.bind(this);
 			this.blocks.ref.section.mode.boxRenderer = this.renderTag;
@@ -7088,6 +7150,74 @@ define('sequence/themes/Sketch',[
 			};
 		}
 
+		renderRevConnector(attrs, {xL, dx1, dx2, y1, y2, xR}) {
+			const variance = Math.min((xR - xL) * 0.06, 3);
+			const overshoot = Math.min((xR - xL) * 0.5, 6);
+			const p1x = xL + dx1 + this.vary(variance, -1);
+			const p1y = y1 + this.vary(variance, -1);
+			const b1x = xR - overshoot * this.vary(0.2, 1);
+			const b1y = y1 - this.vary(1, 2);
+			const p2x = xR;
+			const p2y = y1 + this.vary(1, 1);
+			const b2x = xR;
+			const b2y = y2 + this.vary(2);
+			const p3x = xL + dx2 + this.vary(variance, -1);
+			const p3y = y2 + this.vary(variance, -1);
+
+			return {
+				shape: svg.make('path', Object.assign({
+					d: (
+						'M' + p1x + ' ' + p1y +
+						'C' + p1x + ' ' + p1y +
+						',' + b1x + ' ' + b1y +
+						',' + p2x + ' ' + p2y +
+						'S' + b2x + ' ' + b2y +
+						',' + p3x + ' ' + p3y
+					),
+				}, attrs)),
+				p1: {x: p1x - dx1, y: p1y},
+				p2: {x: p3x - dx2, y: p3y},
+			};
+		}
+
+		renderFlatConnectorWave(attrs, {x1, dx1, x2, dx2, y}) {
+			const x1v = x1 + this.vary(0.3);
+			const x2v = x2 + this.vary(0.3);
+			const y1v = y + this.vary(1);
+			const y2v = y + this.vary(1);
+			return {
+				shape: svg.make('path', Object.assign({
+					d: new SVGShapes.PatternedLine(this.wave)
+						.move(x1v + dx1, y1v)
+						.line(x2v + dx2, y2v)
+						.cap()
+						.asPath(),
+				}, attrs)),
+				p1: {x: x1v, y: y1v},
+				p2: {x: x2v, y: y2v},
+			};
+		}
+
+		renderRevConnectorWave(attrs, {xL, dx1, dx2, y1, y2, xR}) {
+			const x1v = xL + this.vary(0.3);
+			const x2v = xL + this.vary(0.3);
+			const y1v = y1 + this.vary(1);
+			const y2v = y2 + this.vary(1);
+			return {
+				shape: svg.make('path', Object.assign({
+					d: new SVGShapes.PatternedLine(this.wave)
+						.move(x1v + dx1, y1v)
+						.line(xR, y1)
+						.arc(xR, (y1 + y2) / 2, Math.PI)
+						.line(x2v + dx2, y2v)
+						.cap()
+						.asPath(),
+				}, attrs)),
+				p1: {x: x1v, y: y1v},
+				p2: {x: x2v, y: y2v},
+			};
+		}
+
 		renderArrowHead(attrs, {x, y, dx, dy}) {
 			const w = dx * this.vary(0.2, 1);
 			const h = dy * this.vary(0.3, 1);

scripts/sequence/themes/BaseTheme.js

@@ -1,4 +1,10 @@
-define(['svg/SVGUtilities', 'svg/PatternedLine'], (svg, PatternedLine) => {
+define([
+	'svg/SVGUtilities',
+	'svg/SVGShapes',
+], (
+	svg,
+	SVGShapes
+) => {
 	'use strict';
 
 	function deepCopy(o) {
@@ -111,6 +117,9 @@ define(['svg/SVGUtilities', 'svg/PatternedLine'], (svg, PatternedLine) => {
 
 	BaseTheme.WavePattern = class WavePattern {
 		constructor(width, height) {
+			if(Array.isArray(height)) {
+				this.deltas = height;
+			} else {
 				this.deltas = [
 					0,
 					-height * 2 / 3,
@@ -121,6 +130,7 @@ define(['svg/SVGUtilities', 'svg/PatternedLine'], (svg, PatternedLine) => {
 					height,
 					height * 2 / 3,
 				];
+			}
 			this.partWidth = width / this.deltas.length;
 		}
 
@@ -132,7 +142,7 @@ define(['svg/SVGUtilities', 'svg/PatternedLine'], (svg, PatternedLine) => {
 	BaseTheme.renderFlatConnector = (pattern, attrs, {x1, dx1, x2, dx2, y}) => {
 		return {
 			shape: svg.make('path', Object.assign({
-				d: new PatternedLine(pattern)
+				d: new SVGShapes.PatternedLine(pattern)
 					.move(x1 + dx1, y)
 					.line(x2 + dx2, y)
 					.cap()
@@ -150,7 +160,7 @@ define(['svg/SVGUtilities', 'svg/PatternedLine'], (svg, PatternedLine) => {
 	) => {
 		return {
 			shape: svg.make('path', Object.assign({
-				d: new PatternedLine(pattern)
+				d: new SVGShapes.PatternedLine(pattern)
 					.move(xL + dx1, y1)
 					.line(xR, y1)
 					.arc(xR, (y1 + y2) / 2, Math.PI)

scripts/sequence/themes/Sketch.js

@@ -30,8 +30,6 @@ define([
 		'stroke-linecap': 'round',
 	};
 
-	const WAVE = new BaseTheme.WavePattern(6, 0.5);
-
 	const SETTINGS = {
 		titleMargin: 10,
 		outerMargin: 5,
@@ -83,7 +81,7 @@ define([
 						'fill': 'none',
 					}, PENCIL),
 					renderFlat: null,
-					renderRev: BaseTheme.renderRevConnector.bind(null, null),
+					renderRev: null,
 				},
 				'dash': {
 					attrs: Object.assign({
@@ -91,7 +89,7 @@ define([
 						'stroke-dasharray': '4, 2',
 					}, PENCIL),
 					renderFlat: null,
-					renderRev: BaseTheme.renderRevConnector.bind(null, null),
+					renderRev: null,
 				},
 				'wave': {
 					attrs: Object.assign({
@@ -99,8 +97,8 @@ define([
 						'stroke-linejoin': 'round',
 						'stroke-linecap': 'round',
 					}, PENCIL),
-					renderFlat: BaseTheme.renderFlatConnector.bind(null, WAVE),
+					renderFlat: null,
-					renderRev: BaseTheme.renderRevConnector.bind(null, WAVE),
+					renderRev: null,
 				},
 			},
 			arrow: {
@@ -291,6 +289,31 @@ define([
 	const RIGHT = {};
 	const LEFT = {};
 
+	class SketchWavePattern extends BaseTheme.WavePattern {
+		constructor(width, handedness) {
+			const heights = [
+				+0.0,
+				-0.3,
+				-0.6,
+				-0.75,
+				-0.45,
+				+0.0,
+				+0.45,
+				+0.75,
+				+0.6,
+				+0.3,
+			];
+			if(handedness !== RIGHT) {
+				heights.reverse();
+			}
+			super(6, heights);
+		}
+
+		getDelta(p) {
+			return super.getDelta(p) + Math.sin(p * 0.03) * 0.5;
+		}
+	}
+
 	class SketchTheme extends BaseTheme {
 		constructor(handedness = RIGHT) {
 			super({
@@ -308,29 +331,49 @@ define([
 				this.handedness = -1;
 			}
 			this.random = new Random();
+			this.wave = new SketchWavePattern(4, handedness);
 
-			this._assignFunctions();
+			this._assignCapFunctions();
+			this._assignConnectFunctions();
+			this._assignNoteFunctions();
+			this._assignBlockFunctions();
 		}
 
-		_assignFunctions() {
+		_assignCapFunctions() {
 			this.renderBar = this.renderBar.bind(this);
 			this.renderBox = this.renderBox.bind(this);
-			this.renderArrowHead = this.renderArrowHead.bind(this);
-			this.renderFlatConnector = this.renderFlatConnector.bind(this);
-			this.renderTag = this.renderTag.bind(this);
 
 			this.agentCap.cross.render = this.renderCross.bind(this);
 			this.agentCap.bar.render = this.renderBar;
 			this.agentCap.box.boxRenderer = this.renderBox;
+		}
+
+		_assignConnectFunctions() {
+			this.renderArrowHead = this.renderArrowHead.bind(this);
+			this.renderFlatConnector = this.renderFlatConnector.bind(this);
+			this.renderRevConnector = this.renderRevConnector.bind(this);
 
 			this.connect.arrow.single.render = this.renderArrowHead;
 			this.connect.arrow.double.render = this.renderArrowHead;
 
 			this.connect.line.solid.renderFlat = this.renderFlatConnector;
+			this.connect.line.solid.renderRev = this.renderRevConnector;
 			this.connect.line.dash.renderFlat = this.renderFlatConnector;
+			this.connect.line.dash.renderRev = this.renderRevConnector;
+			this.connect.line.wave.renderFlat =
+				this.renderFlatConnectorWave.bind(this);
+			this.connect.line.wave.renderRev =
+				this.renderRevConnectorWave.bind(this);
+		}
 
+		_assignNoteFunctions() {
 			this.notes.note.boxRenderer = this.renderNote.bind(this);
 			this.notes.state.boxRenderer = this.renderState.bind(this);
+		}
+
+		_assignBlockFunctions() {
+			this.renderTag = this.renderTag.bind(this);
+
 			this.blocks.ref.boxRenderer = this.renderRefBlock.bind(this);
 			this.blocks[''].boxRenderer = this.renderBlock.bind(this);
 			this.blocks.ref.section.mode.boxRenderer = this.renderTag;
@@ -530,6 +573,74 @@ define([
 			};
 		}
 
+		renderRevConnector(attrs, {xL, dx1, dx2, y1, y2, xR}) {
+			const variance = Math.min((xR - xL) * 0.06, 3);
+			const overshoot = Math.min((xR - xL) * 0.5, 6);
+			const p1x = xL + dx1 + this.vary(variance, -1);
+			const p1y = y1 + this.vary(variance, -1);
+			const b1x = xR - overshoot * this.vary(0.2, 1);
+			const b1y = y1 - this.vary(1, 2);
+			const p2x = xR;
+			const p2y = y1 + this.vary(1, 1);
+			const b2x = xR;
+			const b2y = y2 + this.vary(2);
+			const p3x = xL + dx2 + this.vary(variance, -1);
+			const p3y = y2 + this.vary(variance, -1);
+
+			return {
+				shape: svg.make('path', Object.assign({
+					d: (
+						'M' + p1x + ' ' + p1y +
+						'C' + p1x + ' ' + p1y +
+						',' + b1x + ' ' + b1y +
+						',' + p2x + ' ' + p2y +
+						'S' + b2x + ' ' + b2y +
+						',' + p3x + ' ' + p3y
+					),
+				}, attrs)),
+				p1: {x: p1x - dx1, y: p1y},
+				p2: {x: p3x - dx2, y: p3y},
+			};
+		}
+
+		renderFlatConnectorWave(attrs, {x1, dx1, x2, dx2, y}) {
+			const x1v = x1 + this.vary(0.3);
+			const x2v = x2 + this.vary(0.3);
+			const y1v = y + this.vary(1);
+			const y2v = y + this.vary(1);
+			return {
+				shape: svg.make('path', Object.assign({
+					d: new SVGShapes.PatternedLine(this.wave)
+						.move(x1v + dx1, y1v)
+						.line(x2v + dx2, y2v)
+						.cap()
+						.asPath(),
+				}, attrs)),
+				p1: {x: x1v, y: y1v},
+				p2: {x: x2v, y: y2v},
+			};
+		}
+
+		renderRevConnectorWave(attrs, {xL, dx1, dx2, y1, y2, xR}) {
+			const x1v = xL + this.vary(0.3);
+			const x2v = xL + this.vary(0.3);
+			const y1v = y1 + this.vary(1);
+			const y2v = y2 + this.vary(1);
+			return {
+				shape: svg.make('path', Object.assign({
+					d: new SVGShapes.PatternedLine(this.wave)
+						.move(x1v + dx1, y1v)
+						.line(xR, y1)
+						.arc(xR, (y1 + y2) / 2, Math.PI)
+						.line(x2v + dx2, y2v)
+						.cap()
+						.asPath(),
+				}, attrs)),
+				p1: {x: x1v, y: y1v},
+				p2: {x: x2v, y: y2v},
+			};
+		}
+
 		renderArrowHead(attrs, {x, y, dx, dy}) {
 			const w = dx * this.vary(0.2, 1);
 			const h = dy * this.vary(0.3, 1);

scripts/svg/SVGShapes.js

@@ -1,4 +1,12 @@
-define(['./SVGUtilities', './SVGTextBlock'], (svg, SVGTextBlock) => {
+define([
+	'./SVGUtilities',
+	'./SVGTextBlock',
+	'./PatternedLine',
+], (
+	svg,
+	SVGTextBlock,
+	PatternedLine
+) => {
 	'use strict';
 
 	function renderBox(attrs, position) {
@@ -112,5 +120,6 @@ define(['./SVGUtilities', './SVGTextBlock'], (svg, SVGTextBlock) => {
 		renderNote,
 		renderBoxedText,
 		TextBlock: SVGTextBlock,
+		PatternedLine,
 	};
 });