glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glColor3f( 0.0, 0.0, 0.0 );
+ float arrowLength = 0.5;
+
glBegin(GL_LINES);
// x arrow
glVertex3i( lineLength, 0.0, 0.0 );
glVertex3i( -lineLength, 0.0, 0.0 );
// x arrowheads
- glVertex3i( lineLength - 1, 0.0, 0.0 );
- glVertex3i( -lineLength - 1, 0.0, 0.0 );
-
- glVertex3i( lineLength - 1, 0.0, 0.0 );
- glVertex3i( -lineLength + 1, 0.0, 0.0 );
+ 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 );
+
+ 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 );