X-Git-Url: https://git.ucc.asn.au/?p=atyndall%2Fcits2231.git;a=blobdiff_plain;f=helper.c;h=d7d418bc24a7acc288d4bfe69d6f5585280c5d0f;hp=aebdaeecebffa1ed6574dfca8e5d0f652c8655f4;hb=736f5bfdedf4e3cd741eed4ee2974b3d133106fd;hpb=279764e831c70dd8e02a5d70b1c3715464b1b731;ds=sidebyside

diff --git a/helper.c b/helper.c
index aebdaee..d7d418b 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 = 0.3;
 
   glBegin(GL_LINES);
     // x arrow
@@ -277,15 +277,16 @@ void drawLine() {
     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 );
+    glVertex3i(  0.0, 0.0, -lineLength );
 
-    glVertex3i( -lineLength, 0.0, 0.0 );
-    glVertex3i( -lineLength + arrowLength, 0.0, -1.0 );
+    // z arrowheads
+    glVertex3i(  0.0, 0.0,  lineLength );
+    glVertex3i(  1.0, 0.0,  lineLength - arrowLength );
 
-    // z arrow
-    glVertex3i( 0.0, 0.0,  lineLength );
-    glVertex3i( 0.0, 0.0, -lineLength );
+    glVertex3i(  0.0, 0.0,  lineLength );
+    glVertex3i( -1.0, 0.0,  lineLength - arrowLength );
   glEnd();
 
   glDisable(GL_BLEND);