From aeeda29104e51ee0dd778e44669f59bb597bb22d Mon Sep 17 00:00:00 2001
From: xswei <xswei@foxmail.com>
Date: Fri, 26 Sep 2025 14:42:55 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20tick=E8=AE=A1=E7=AE=97=E7=B2=BE=E5=BA=A6?=
 =?UTF-8?q?=E9=97=AE=E9=A2=98?=
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---
 __tests__/unit/tick-methods/d3-ticks.spec.ts | 4 ++++
 src/tick-methods/d3-ticks.ts                 | 3 ++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/__tests__/unit/tick-methods/d3-ticks.spec.ts b/__tests__/unit/tick-methods/d3-ticks.spec.ts
index d4a8c02..98b487d 100644
--- a/__tests__/unit/tick-methods/d3-ticks.spec.ts
+++ b/__tests__/unit/tick-methods/d3-ticks.spec.ts
@@ -29,4 +29,8 @@ describe('d3 ticks', () => {
     expect(fn(0, 5, -1)).toStrictEqual(fn(0, 5, 0));
     expect(fn(0, 5, -1.2)).toStrictEqual(fn(0, 5, 0));
   });
+
+  test('maximum value accuracy', () => {
+    expect(fn(0.53, 0.58, 6)).toStrictEqual([0.53, 0.54, 0.55, 0.56, 0.57, 0.58]);
+  });
 });
diff --git a/src/tick-methods/d3-ticks.ts b/src/tick-methods/d3-ticks.ts
index 857ccf3..064e065 100644
--- a/src/tick-methods/d3-ticks.ts
+++ b/src/tick-methods/d3-ticks.ts
@@ -42,7 +42,8 @@ export const d3Ticks: TickMethod = (begin: number, end: number, count: number, b
   } else {
     step = -step;
     start = Math.ceil(start * step);
-    stop = Math.floor(stop * step);
+    // 1e-10: Math.floor(0.58 * 100) => 57
+    stop = Math.floor(stop * step + 1e-10);
     ticks = new Array((n = Math.ceil(stop - start + 1)));
     for (let i = 0; i < n; i += 1) {
       ticks[i] = (start + i) / step;