add rule fail rate property

petri/src/lib.rs

@@ -36,7 +36,8 @@ pub struct Rule {
 	pub flip_x: bool,
 	pub flip_y: bool,
 	pub rotate: bool,
-	// probability: u8
+	#[serde(default)]
+	pub failrate: u8,
 }
 
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
@@ -131,6 +132,7 @@ impl Rule {
 			flip_x: false,
 			flip_y: false,
 			rotate: false,
+			failrate: 0,
 		}
 	}
 
@@ -383,6 +385,11 @@ impl Dish {
 			return;
 		}
 
+		let fail: u8 = random();
+		if rule.failrate > fail {
+			return;
+		}
+
 		let width = variant.width;
 		let height = variant.height;
 		let mut old_state = Vec::new();

uscope/src/main.rs

@@ -10,7 +10,7 @@ use eframe::{
 	epaint::Hsva,
 	NativeOptions,
 };
-use egui::{collapsing_header::CollapsingState, PointerButton};
+use egui::{collapsing_header::CollapsingState, DragValue, PointerButton};
 use native_dialog::FileDialog;
 use rand::prelude::*;
 use serde::{Deserialize, Serialize};
@@ -272,10 +272,13 @@ fn rule_editor(
 					rule.generate_variants();
 				}
 			});
-			if ui.checkbox(&mut rule.rotate, "rotate").changed() {
-				rule.generate_variants();
-			}
-
+			ui.horizontal(|ui| {
+				if ui.checkbox(&mut rule.rotate, "rotate").changed() {
+					rule.generate_variants();
+				}
+				ui.label("fail rate");
+				ui.add(DragValue::new(&mut rule.failrate));
+			});
 			let cells_y = rule.height();
 			let cells_x = rule.width();
 			let patt_width = CSIZE * cells_x as f32;