X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;ds=inline;f=helper.c;h=b80a513ea35dd8d76d7b69dc5ef06f0a3be238af;hb=a73bfc78d5ebac0c1cb851ed8b619fbd13acea9c;hp=ceb7c1529c59ca2aa26d038b60102887e7a5a0c2;hpb=42f7093208bb77a0973435339f4e4361f402eb13;p=atyndall%2Fcits2231.git

diff --git a/helper.c b/helper.c
index ceb7c15..b80a513 100644
--- a/helper.c
+++ b/helper.c
@@ -263,12 +263,18 @@ void drawLine() {
   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
   glColor3f( 0.0, 0.0, 0.0 );
 
+  float arrowLength = 1.0;
+
   glBegin(GL_LINES);
+    // x arrow
     glVertex3i(  lineLength, 0.0, 0.0 );
     glVertex3i( -lineLength, 0.0, 0.0 );
-  glEnd();
+    
+    // x arrowheads
+    glVertex3i(  lineLength, 0.0, 0.0 );
+    glVertex3i(  lineLength -  arrowLength, 0.0,  arrowLength );
 
-  glBegin(GL_LINES);
+    // z arrow
     glVertex3i( 0.0, 0.0,  lineLength );
     glVertex3i( 0.0, 0.0, -lineLength );
   glEnd();