Add char.rs

src/char.rs

@@ -0,0 +1,16 @@
+pub struct CharSampler {
+    chars: String
+}
+
+impl CharSampler {
+    pub fn new(chars: String) -> Self {
+        Self { chars }
+    }
+
+    pub fn sample(&self, level: f32) -> char {
+        let pos = level * self.chars.chars().count() as f32;
+        let index = pos as usize;
+
+        self.chars.chars().nth(index).unwrap()
+    }
+}

src/main.rs

@@ -1,20 +1,26 @@
 use clap::Parser;
 use rand::rngs::OsRng;
+use crate::char::CharSampler;
 use crate::pallet::{choose_pallet, create_pallet, PalletEnum};
 
 mod pallet;
+mod char;
 
 #[derive(Parser)]
 #[clap(author = "Rico Riedel", version = "0.1.0", about = "Wipe your terminal with a random animation.")]
 struct Args {
     #[clap(short, long, help = "Add color pallet", arg_enum)]
     pallet: Vec<PalletEnum>,
+    #[clap(long, default_value = ".-+%#", help = "Set chars")]
+    chars: String
 }
 
 fn main() {
     let args = Args::parse();
     let rng = &mut OsRng::default();
 
+    let chars = CharSampler::new(args.chars);
+
     let pallet_key = choose_pallet(args.pallet, rng);
     let pallet = create_pallet(pallet_key);
 }