diff --git a/emath/src/pos2.rs b/emath/src/pos2.rs
index 7afcb3aa..7fde33cb 100644
--- a/emath/src/pos2.rs
+++ b/emath/src/pos2.rs
@@ -122,10 +122,16 @@ impl Pos2 {
         pos2(self.x.ceil(), self.y.ceil())
     }
 
+    /// True if all members are also finite.
     pub fn is_finite(self) -> bool {
         self.x.is_finite() && self.y.is_finite()
     }
 
+    /// True if any member is NaN.
+    pub fn any_nan(self) -> bool {
+        self.x.is_nan() || self.y.is_nan()
+    }
+
     #[must_use]
     pub fn min(self, other: Self) -> Self {
         pos2(self.x.min(other.x), self.y.min(other.y))
diff --git a/emath/src/rect.rs b/emath/src/rect.rs
index 9a8af43c..d8849c65 100644
--- a/emath/src/rect.rs
+++ b/emath/src/rect.rs
@@ -163,6 +163,7 @@ impl Rect {
         Rect::from_min_size(self.min + amnt, self.size())
     }
 
+    /// The intersection of two `Rect`, i.e. the area covered by both.
     #[must_use]
     pub fn intersect(self, other: Rect) -> Self {
         Self {
@@ -290,9 +291,15 @@ impl Rect {
         self.max.x < self.min.x || self.max.y < self.min.y
     }
 
+    /// True if all members are also finite.
     pub fn is_finite(&self) -> bool {
         self.min.is_finite() && self.max.is_finite()
     }
+
+    /// True if any member is NaN.
+    pub fn any_nan(self) -> bool {
+        self.min.any_nan() || self.max.any_nan()
+    }
 }
 
 /// ## Convenience functions (assumes origin is towards left top):
diff --git a/emath/src/vec2.rs b/emath/src/vec2.rs
index 4a59904c..73450c24 100644
--- a/emath/src/vec2.rs
+++ b/emath/src/vec2.rs
@@ -155,6 +155,11 @@ impl Vec2 {
         self.x.is_finite() && self.y.is_finite()
     }
 
+    /// True if any member is NaN.
+    pub fn any_nan(self) -> bool {
+        self.x.is_nan() || self.y.is_nan()
+    }
+
     #[must_use]
     pub fn min(self, other: Self) -> Self {
         vec2(self.x.min(other.x), self.y.min(other.y))