X-Git-Url: https://git.ucc.asn.au/?p=atyndall%2Fcits2231.git;a=blobdiff_plain;f=helper.c;h=b98439e85b9051b752e6bad0ea45d723fe2eb635;hp=5903b843197c531c52de0bcbed17a9a6517208b7;hb=bc40db0c36dac196dc3c7d1271d356fe315e0f56;hpb=9644796a64e902273a02a75c68e22da05b3a87ec

diff --git a/helper.c b/helper.c
index 5903b84..b98439e 100644
--- a/helper.c
+++ b/helper.c
@@ -263,7 +263,7 @@ void drawLine() {
   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
   glColor3f( 0.0, 0.0, 0.0 );
 
-  float arrowLength = 0.5;
+  float arrowLength = 1.0;
 
   glBegin(GL_LINES);
     // x arrow
@@ -272,7 +272,13 @@ void drawLine() {
     
     // x arrowheads
     glVertex3i(  lineLength, 0.0, 0.0 );
-    glVertex3i(  lineLength -  arrowLength, 0.0,  arrowLength );
+    glVertex3i(  lineLength - arrowLength, 0.0,  1.0 );
+
+    glVertex3i(  lineLength, 0.0, 0.0 );
+    glVertex3i(  lineLength - arrowLength, 0.0, -1.0 );
+
+    glVertex3i( -lineLength, 0.0, 0.0 );
+    glVertex3i( -lineLength - arrowLength, 0.0,  1.0 );
 
     // z arrow
     glVertex3i( 0.0, 0.0,  lineLength );