add triangle shape

src/lib.rs

@@ -112,6 +112,7 @@ mod stroke;
 #[cfg(feature = "std")]
 mod svg;
 mod translate_scale;
+mod triangle;
 mod vec2;
 
 pub use crate::affine::*;
@@ -136,4 +137,5 @@ pub use crate::stroke::*;
 #[cfg(feature = "std")]
 pub use crate::svg::*;
 pub use crate::translate_scale::*;
+pub use crate::triangle::*;
 pub use crate::vec2::*;

src/point.rs

@@ -3,6 +3,7 @@
 
 //! A 2D point.
 
+use core::cmp::Ordering;
 use core::fmt;
 use core::ops::{Add, AddAssign, Sub, SubAssign};
 
@@ -185,6 +186,30 @@ impl Point {
     pub fn is_nan(self) -> bool {
         self.x.is_nan() || self.y.is_nan()
     }
+
+    /// The topmost [`Point`]
+    #[inline]
+    pub fn topmost(&self, other: &Self) -> Ordering {
+        self.y.total_cmp(&other.y)
+    }
+
+    /// The bottommost [`Point`]
+    #[inline]
+    pub fn bottommost(&self, other: &Self) -> Ordering {
+        other.y.total_cmp(&self.y)
+    }
+
+    /// The rightmost [`Point`]
+    #[inline]
+    pub fn rightmost(&self, other: &Self) -> Ordering {
+        self.x.total_cmp(&other.x)
+    }
+
+    /// The leftmost [`Point`]
+    #[inline]
+    pub fn leftmost(&self, other: &Self) -> Ordering {
+        other.x.total_cmp(&self.x)
+    }
 }
 
 impl From<(f32, f32)> for Point {