(no commit message)

diff --git a/helper.c b/helper.c
index 5903b84..3b82580 100644 (file)
--- 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 +272,10 @@ void drawLine() {
     
     // x arrowheads
     glVertex3i(  lineLength, 0.0, 0.0 );
-    glVertex3i(  lineLength -  arrowLength, 0.0,  arrowLength );
+    glVertex3i(  lineLength - arrowLength, 0.0, arrowLength );
+
+    glVertex3i( -lineLength, 0.0, 0.0 );
+    glVertex3i( -lineLength - arrowLength, 0.0, arrowLength );
 
     // z arrow
     glVertex3i( 0.0, 0.0,  lineLength );