From e9579197a751394f54bf221c0213f603ff561b7f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=9F=A9=E6=8B=93?= <hantuo1984@gmail.com>
Date: Thu, 5 Jan 2017 23:45:31 +0800
Subject: [PATCH 1/4] Update linechart.go

---
 linechart.go | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/linechart.go b/linechart.go
index 1886114..7c720de 100644
--- a/linechart.go
+++ b/linechart.go
@@ -135,6 +135,7 @@ func (lc *LineChart) renderBraille() Buffer {
 
 func (lc *LineChart) renderDot() Buffer {
 	buf := NewBuffer()
+	oy := -1
 	for i := 0; i < len(lc.Data) && i < lc.axisXWidth; i++ {
 		c := Cell{
 			Ch: lc.DotStyle,
@@ -143,6 +144,17 @@ func (lc *LineChart) renderDot() Buffer {
 		}
 		x := lc.innerArea.Min.X + lc.labelYSpace + 1 + i
 		y := lc.innerArea.Min.Y + lc.innerArea.Dy() - 3 - int((lc.Data[i]-lc.bottomValue)/lc.scale+0.5)
+		
+		if oy != -1 {
+			u := 1
+			if oy > y {
+				u = -1
+			}
+			for i := oy; i != y; i += u {
+				buf.Set(x, i, c)
+			}
+		}
+		
 		buf.Set(x, y, c)
 	}
 

From ee9a03159593b7362c5ec7d4fb034be6bdad4e74 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=9F=A9=E6=8B=93?= <hantuo1984@gmail.com>
Date: Thu, 5 Jan 2017 23:47:12 +0800
Subject: [PATCH 2/4] Update linechart.go

---
 linechart.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/linechart.go b/linechart.go
index 7c720de..c833a6c 100644
--- a/linechart.go
+++ b/linechart.go
@@ -154,6 +154,7 @@ func (lc *LineChart) renderDot() Buffer {
 				buf.Set(x, i, c)
 			}
 		}
+		oy = y
 		
 		buf.Set(x, y, c)
 	}

From f0de1c55061b64e394a54c4c496d6c80e7b390d6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=9F=A9=E6=8B=93?= <hantuo1984@gmail.com>
Date: Fri, 6 Jan 2017 00:27:43 +0800
Subject: [PATCH 3/4] Update linechart.go

---
 linechart.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/linechart.go b/linechart.go
index c833a6c..bf6ee8b 100644
--- a/linechart.go
+++ b/linechart.go
@@ -145,12 +145,12 @@ func (lc *LineChart) renderDot() Buffer {
 		x := lc.innerArea.Min.X + lc.labelYSpace + 1 + i
 		y := lc.innerArea.Min.Y + lc.innerArea.Dy() - 3 - int((lc.Data[i]-lc.bottomValue)/lc.scale+0.5)
 		
-		if oy != -1 {
+		if oy != -1 && oy != y{
 			u := 1
 			if oy > y {
 				u = -1
 			}
-			for i := oy; i != y; i += u {
+			for i := oy + u; i != y; i += u {
 				buf.Set(x, i, c)
 			}
 		}

From 322b4a1dd44896b61591086c75ed33a29a05256e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=9F=A9=E6=8B=93?= <hantuo1984@gmail.com>
Date: Fri, 6 Jan 2017 01:13:08 +0800
Subject: [PATCH 4/4] Update linechart.go

---
 linechart.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/linechart.go b/linechart.go
index bf6ee8b..3b731ff 100644
--- a/linechart.go
+++ b/linechart.go
@@ -151,7 +151,11 @@ func (lc *LineChart) renderDot() Buffer {
 				u = -1
 			}
 			for i := oy + u; i != y; i += u {
-				buf.Set(x, i, c)
+				dx := -1
+				if u*(i-oy) >= u*(y-oy)/2 {
+					dx = 0
+				}
+				buf.Set(x+dx, i, c)
 			}
 		}
 		oy = y