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* pathFixed * expose Path; template literal * minimize diff * minimize diff * Path(digits); pathFixed(digits = 3) * Update README * simpler iteration * pathRound, not pathFixed * shorter Co-authored-by: Philippe Rivière <fil@rezo.net>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1 +1 @@ | ||
| export {default as path} from "./path.js"; | ||
| export {Path, path, pathRound} from "./path.js"; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| import assert from "assert"; | ||
| import {path, pathRound} from "../src/index.js"; | ||
|
|
||
| it("pathRound() defaults to three digits of precision", () => { | ||
| const p = pathRound(); | ||
| p.moveTo(Math.PI, Math.E); | ||
| assert.strictEqual(p + "", "M3.142,2.718"); | ||
| }); | ||
|
|
||
| it("pathRound(null) is equivalent to pathRound(0)", () => { | ||
| const p = pathRound(null); | ||
| p.moveTo(Math.PI, Math.E); | ||
| assert.strictEqual(p + "", "M3,3"); | ||
| }); | ||
|
|
||
| it("pathRound(digits) validates the specified digits", () => { | ||
| assert.throws(() => pathRound(NaN), /invalid digits/); | ||
| assert.throws(() => pathRound(-1), /invalid digits/); | ||
| }); | ||
|
|
||
| it("pathRound(digits) ignores digits if greater than 15", () => { | ||
| const p = pathRound(40); | ||
| p.moveTo(Math.PI, Math.E); | ||
| assert.strictEqual(p + "", "M3.141592653589793,2.718281828459045"); | ||
| }); | ||
|
|
||
| it("pathRound.moveTo(x, y) limits the precision", () => { | ||
| const p = pathRound(1); | ||
| p.moveTo(123.456, 789.012); | ||
| assert.strictEqual(p + "", "M123.5,789"); | ||
| }); | ||
|
|
||
| it("pathRound.lineTo(x, y) limits the precision", () => { | ||
| const p = pathRound(1); | ||
| p.moveTo(0, 0); | ||
| p.lineTo(123.456, 789.012); | ||
| assert.strictEqual(p + "", "M0,0L123.5,789"); | ||
| }); | ||
|
|
||
| it("pathRound.arc(x, y, r, a0, a1, ccw) limits the precision", () => { | ||
| const p0 = path(), p = pathRound(1); | ||
| p0.arc(10.0001, 10.0001, 123.456, 0, Math.PI+0.0001); | ||
| p.arc(10.0001, 10.0001, 123.456, 0, Math.PI+0.0001); | ||
| assert.strictEqual(p + "", precision(p0 + "", 1)); | ||
| p0.arc(10.0001, 10.0001, 123.456, 0, Math.PI-0.0001); | ||
| p.arc(10.0001, 10.0001, 123.456, 0, Math.PI-0.0001); | ||
| assert.strictEqual(p + "", precision(p0 + "", 1)); | ||
| p0.arc(10.0001, 10.0001, 123.456, 0, Math.PI / 2, true); | ||
| p.arc(10.0001, 10.0001, 123.456, 0, Math.PI / 2, true); | ||
| assert.strictEqual(p + "", precision(p0 + "", 1)); | ||
| }); | ||
|
|
||
| it("pathRound.arcTo(x1, y1, x2, y2, r) limits the precision", () => { | ||
| const p0 = path(), p = pathRound(1); | ||
| p0.arcTo(10.0001, 10.0001, 123.456, 456.789, 12345.6789); | ||
| p.arcTo(10.0001, 10.0001, 123.456, 456.789, 12345.6789); | ||
| assert.strictEqual(p + "", precision(p0 + "", 1)); | ||
| }); | ||
|
|
||
| it("pathRound.quadraticCurveTo(x1, y1, x, y) limits the precision", () => { | ||
| const p0 = path(), p = pathRound(1); | ||
| p0.quadraticCurveTo(10.0001, 10.0001, 123.456, 456.789); | ||
| p.quadraticCurveTo(10.0001, 10.0001, 123.456, 456.789); | ||
| assert.strictEqual(p + "", precision(p0 + "", 1)); | ||
| }); | ||
|
|
||
| it("pathRound.bezierCurveTo(x1, y1, x2, y2, x, y) limits the precision", () => { | ||
| const p0 = path(), p = pathRound(1); | ||
| p0.bezierCurveTo(10.0001, 10.0001, 123.456, 456.789, 0.007, 0.006); | ||
| p.bezierCurveTo(10.0001, 10.0001, 123.456, 456.789, 0.007, 0.006); | ||
| assert.strictEqual(p + "", precision(p0 + "", 1)); | ||
| }); | ||
|
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||
| it("pathRound.rect(x, y, w, h) limits the precision", () => { | ||
| const p0 = path(), p = pathRound(1); | ||
| p0.rect(10.0001, 10.0001, 123.456, 456.789); | ||
| p.rect(10.0001, 10.0001, 123.456, 456.789); | ||
| assert.strictEqual(p + "", precision(p0 + "", 1)); | ||
| }); | ||
|
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||
| function precision(str, precision) { | ||
| return str.replace(/\d+\.\d+/g, s => +parseFloat(s).toFixed(precision)); | ||
| } |