Make polygons deletable

Before, the deletion tool was not targeting polygons. I also took the
liberty to broaden the functionality of the surface trait, which now can
check if a rectangle or polygon is contained.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/math/mod.rs b/src/math/mod.rs
index 6f83c98..b84d270 100644
--- a/src/math/mod.rs
+++ b/src/math/mod.rs
@@ -20,6 +20,12 @@ pub trait Surface<T: Scalar + Copy> {
 
     /// Checks if a line segment is entirely contained by this surface.
     fn contains_line_segment(&self, line_segment: &LineSegment<T>) -> bool;
+
+    /// Checks if a rectangle is entirely contained inside this surface.
+    fn contains_rect(&self, rect: &Rect<T>) -> bool;
+
+    /// Checks if a polygon is contained wholly by this surface.
+    fn contains_polygon(&self, polygon: &Polygon<T>) -> bool;
 }
 
 /// Round a floating point number to the nearest step given by the step argument. For instance, if