From 2813933dbf92ed25a4b00c514ad20c1893145538 Mon Sep 17 00:00:00 2001
From: Ash Tyndall <git@atyndall.net>
Date: Fri, 21 Oct 2011 09:39:03 +0800
Subject: [PATCH]

---
 helper.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/helper.c b/helper.c
index 9695093..b1b0d96 100644
--- a/helper.c
+++ b/helper.c
@@ -264,8 +264,18 @@ void drawLine() {
   glColor3f( 0.0, 0.0, 0.0 );
 
   glBegin(GL_LINES);
+    // x arrow
     glVertex3i(  lineLength, 0.0, 0.0 );
     glVertex3i( -lineLength, 0.0, 0.0 );
+    
+    // x arrowheads
+    glVertex3i( lineLength - 1, 0.0, 0.0 );
+    glVertex3i( -lineLength - 1, 0.0, 0.0 );
+    
+    glVertex3i( lineLength - 1, 0.0, 0.0 );
+    glVertex3i( -lineLength + 1, 0.0, 0.0 );
+
+    // z arrow
     glVertex3i( 0.0, 0.0,  lineLength );
     glVertex3i( 0.0, 0.0, -lineLength );
   glEnd();
-- 
2.20.1