+ let c = (e.p1 + e.p2) / 2.0;
+ let mut rad = (e.p2 - e.p1).to_radians();
+ rad.0 += std::f64::consts::FRAC_PI_2;
+
+ renderer.draw_line(
+ <(i32, i32)>::from(c.to_i32()),
+ <(i32, i32)>::from((c + Point::from(rad) * 10.0).to_i32()),
+ (255, 128, 0));
+