Change Checkerboard to take a size with ::new()

::default() keeps the original size.

examples/cache.rs

@@ -3,7 +3,7 @@ extern crate noise;
 use noise::{utils::*, Cache, Checkerboard};
 
 fn main() {
-    let cboard = Checkerboard::new();
+    let cboard = Checkerboard::default();
     let cache = Cache::new(&cboard);
 
     PlaneMapBuilder::new(&cache)

examples/checkerboard.rs

@@ -5,7 +5,7 @@ extern crate noise;
 use noise::{utils::*, Checkerboard};
 
 fn main() {
-    let checker = Checkerboard::new();
+    let checker = Checkerboard::default();
 
     PlaneMapBuilder::new(&checker)
         .build()

examples/displace.rs

@@ -3,7 +3,7 @@ extern crate noise;
 use noise::{utils::*, Checkerboard, Constant, Cylinders, Displace, Perlin};
 
 fn main() {
-    let cboard = Checkerboard::new();
+    let cboard = Checkerboard::default();
     let constant = Constant::new(0.0);
     let cylinders = Cylinders::new();
     let perlin = Perlin::new();

examples/scale_point.rs

@@ -3,7 +3,7 @@ extern crate noise;
 use noise::{utils::*, Checkerboard, ScalePoint};
 
 fn main() {
-    let cboard = Checkerboard::new();
+    let cboard = Checkerboard::default();
     let scale_point = ScalePoint::new(cboard).set_all_scales(1.0, 2.0, 3.0, 1.0);
 
     PlaneMapBuilder::new(&scale_point)

examples/select.rs

@@ -3,7 +3,7 @@ extern crate noise;
 use noise::{utils::*, Checkerboard, Constant, Cylinders, Perlin, Select};
 
 fn main() {
-    let checkerboard = &Checkerboard::new();
+    let checkerboard = &Checkerboard::default();
     let cylinders = &Cylinders::new();
     let perlin = &Perlin::new();
     let constant = &Constant::new(0.5);

examples/translate_point.rs

@@ -3,7 +3,7 @@ extern crate noise;
 use noise::{utils::*, Checkerboard, TranslatePoint};
 
 fn main() {
-    let cboard = Checkerboard::new();
+    let cboard = Checkerboard::default();
     let translate_point = TranslatePoint::new(cboard).set_all_translations(0.5, 0.5, 0.0, 0.0);
 
     PlaneMapBuilder::new(&translate_point)

src/noise_fns/generators/checkerboard.rs

@@ -17,22 +17,24 @@ pub struct Checkerboard {
 impl Checkerboard {
     const DEFAULT_SIZE: usize = 0;
 
-    pub fn new() -> Self {
-        Self {
-            size: 1 << Self::DEFAULT_SIZE,
-        }
+    pub fn new(size: usize) -> Self {
+        Self { size: 1 << size }
     }
 
     pub fn set_size(self, size: usize) -> Self {
-        Self {
-            size: 1 << size,
-        }
+        Self { size: 1 << size }
+    }
+
+    pub fn size(&self) -> usize {
+        self.size
     }
 }
 
 impl Default for Checkerboard {
     fn default() -> Self {
-        Self::new()
+        Self {
+            size: 1 << Checkerboard::DEFAULT_SIZE,
+        }
     }
 }