X-Git-Url: https://git.ucc.asn.au/?p=atyndall%2Fcits2231.git;a=blobdiff_plain;f=helper.c;h=404094752514a120a13e43ca4fc58f7dd8ccb814;hp=5903b843197c531c52de0bcbed17a9a6517208b7;hb=04b80f76711fefed66b740898072a6a1fd51171d;hpb=9644796a64e902273a02a75c68e22da05b3a87ec

diff --git a/helper.c b/helper.c
index 5903b84..4040947 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
@@ -272,11 +272,21 @@ 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 );
 
     // z arrow
-    glVertex3i( 0.0, 0.0,  lineLength );
-    glVertex3i( 0.0, 0.0, -lineLength );
+    glVertex3i(  0.0, 0.0,  lineLength );
+    glVertex3i(  0.0, 0.0, -lineLength );
+
+    // z arrowheads
+    glVertex3i(  0.0, 0.0,  lineLength );
+    glVertex3i(  1.0, 0.0,  lineLength - arrowLength );
+
+    glVertex3i(  0.0, 0.0,  lineLength );
+    glVertex3i( -1.0, 0.0,  lineLength - arrowLength );
   glEnd();
 
   glDisable(GL_BLEND);