Change to polygongraph instead of polygon in roomtool

The polygon room tool used a convoluted process for determining what the
user actually wants to draw. I have changed to the polygon graph
instead, which makes the checks easier and restricts the user a bit
less. In the process however I found a serious problem with my handling
float, so everything needed to change to margin compares (which I of
course should have done in the beginning. Guys, take the warning
seriously and don't ignore it for ten years like I did. It will come
back to haunt you.. apparently) instead of direct equality.

1 files changed, 3 insertions, 4 deletions

diff --git a/src/math/rect.rs b/src/math/rect.rs
index 6f993d1..b019ad5 100644
--- a/src/math/rect.rs
+++ b/src/math/rect.rs
@@ -1,9 +1,8 @@
 //! Rectangles where the sides are parallel to the x and y-axes.
 
-use super::{LineSegment, Polygon, Surface, Vec2};
+use super::{ExactSurface, LineSegment, Polygon, Vec2};
 //use alga::general::{Additive, Identity};
-use nalgebra::{ClosedAdd, ClosedSub, RealField, Scalar};
-use num_traits::identities::Zero;
+use nalgebra::{RealField, Scalar};
 use num_traits::{NumCast, ToPrimitive};
 use serde::{Deserialize, Serialize};
 use std::ops::{Add, AddAssign};
@@ -150,7 +149,7 @@ impl<T: Scalar + Copy> Rect<T> {
     }
 }
 
-impl<T: Scalar + Copy + PartialOrd + ClosedAdd + ClosedSub + Zero> Surface<T> for Rect<T> {
+impl<T: RealField> ExactSurface<T> for Rect<T> {
     fn contains_point(&self, point: &Vec2<T>) -> bool {
         point.x >= self.x
             && point.x <= self.x + self.w