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
// 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);