X-Git-Url: https://git.ucc.asn.au/?p=atyndall%2Fcits2231.git;a=blobdiff_plain;f=helper.c;h=0b5a8790ddb9ccd33f96b68f084232329b68c947;hp=004da4330028af07ed20688baea05613d7947e7f;hb=4f5489c9ff0a0c37cc7c89c412b1a1079272337d;hpb=9265bbe175893ed49376b406b64e5b7ecbd9234e

diff --git a/helper.c b/helper.c
index 004da43..0b5a879 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 = 0.1;
 
   glBegin(GL_LINES);
     // x arrow
@@ -272,17 +272,21 @@ void drawLine() {
     
     // x arrowheads
     glVertex3i(  lineLength, 0.0, 0.0 );
-    glVertex3i(  lineLength - arrowLength, 0.0,  0.3 );
+    glVertex3i(  lineLength - arrowLength, 0.0,  1.0 );
 
     glVertex3i(  lineLength, 0.0, 0.0 );
-    glVertex3i(  lineLength - arrowLength, 0.0, -0.3 );
-
-    glVertex3i( -lineLength, 0.0, 0.0 );
-    glVertex3i( -lineLength - arrowLength, 0.0,  0.3 );
+    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);