X-Git-Url: https://git.ucc.asn.au/?p=atyndall%2Fcits2231.git;a=blobdiff_plain;f=helper.c;h=b1b0d967141ad6d5b08f5d8227fc924fcec4da3b;hp=ceb7c1529c59ca2aa26d038b60102887e7a5a0c2;hb=b32b74865d4cc2913383e3a38c629eb2d4d983f6;hpb=42f7093208bb77a0973435339f4e4361f402eb13

diff --git a/helper.c b/helper.c
index ceb7c15..b1b0d96 100644
--- a/helper.c
+++ b/helper.c
@@ -264,11 +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 );
-  glEnd();
-
-  glBegin(GL_LINES);
+    
+    // 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();