From e81c83dfe6a38734a4fc91c162688cad4900bf33 Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Mon, 12 Mar 2018 03:23:29 +0900
Subject: [PATCH] docs: Update

---
 docs/examples/airship.html | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/docs/examples/airship.html b/docs/examples/airship.html
index a1d94e40c..90732a367 100644
--- a/docs/examples/airship.html
+++ b/docs/examples/airship.html
@@ -213,6 +213,9 @@ func drawGroundImage(screen *ebiten.Image, ground *ebiten.Image) {
                 // z is in [1, -1]
                 rate := float64(j) / float64(ph)
                 z := (1-rate)*1 &#43; rate*-1
+                if z &lt;= 0 {
+                        break
+                }
                 op := &amp;ebiten.DrawImageOptions{}
                 op.GeoM.Translate(-float64(pw)/2, 0)
                 op.GeoM.Scale(1/z, 8) // 8 is an arbitrary number not to make empty lines.