add serde feature

Cargo.toml

@@ -20,16 +20,20 @@ rand = { version = "0.8", default-features = false }
 rand_xorshift = "0.3"
 image = { version = "0.25.0", optional = true }
 num-traits = "0.2"
+serde = { version = "1.0.203", features = ["derive"], optional = true }
+
 
 [features]
 default = []
 images = ["image", "std"]
 std = []
+serde = ["dep:serde"]
 
 [dev-dependencies]
 criterion = { version = "0.5.1", features = ["html_reports"] }
 rand = { version = "0.8", default-features = true }
 rand_pcg = "0.3"
+serde_json = "1.0.117"
 
 [[bench]]
 name = "open_simplex"

examples/README.md

@@ -382,6 +382,11 @@ cargo run --example "select" --features="images"
 
 *select2.png*
 
+## [serde](/examples/serde.rs)
+
+```
+cargo run --example "serde" --features="serde"
+```
 
 ## [simplex](/examples/simplex.rs)
 

examples/serde.rs

@@ -0,0 +1,17 @@
+use std::{fs::File, io::Write};
+
+use noise::{utils::*, Perlin};
+use serde::{self, Serialize};
+mod utils;
+
+fn main() {
+    let perlin = Perlin::default();
+
+    let map = &PlaneMapBuilder::new(perlin).build();
+
+    let serialized = serde_json::ser::to_string(map).expect("error serializing");
+
+    let mut file = File::create("examples/file.json").expect("error opening file");
+
+    let _ = file.write(serialized.as_bytes());
+}

src/utils/noise_map.rs

@@ -2,13 +2,17 @@ use alloc::{
     slice::{Iter, IterMut},
     vec::{IntoIter, Vec},
 };
+
 use core::ops::{Index, IndexMut};
 #[cfg(feature = "images")]
 use std::path::Path;
+#[cfg(feature = "serde")]
+use serde::{Deserialize, Serialize};
 
 const RASTER_MAX_WIDTH: u16 = 32_767;
 const RASTER_MAX_HEIGHT: u16 = 32_767;
 
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct NoiseMap {
     size: (usize, usize),
     border_value: f64,