removed math, operable to map and layers, on the way to merging tile and frame

1 files changed, 8 insertions, 0 deletions

diff --git a/src/npc.rs b/src/npc.rs
index 9316e69..c31f305 100644
--- a/src/npc.rs
+++ b/src/npc.rs
@@ -1,5 +1,7 @@
 use ggez::graphics::spritebatch::SpriteBatch;
 use ggez::nalgebra::Point2;
+use rand::Rng;
+use std::f32::consts::PI;
 
 use crate::animations::Animations;
 use crate::entity::{Entity, Operable};
@@ -83,3 +85,9 @@ enum Behavior {
     //Waiting(Instant),
     Wandering(Option<Point2<f32>>),
 }
+
+pub fn random_nearby_point(origin: Point2<f32>, within_radius: f32) -> Point2<f32> {
+    let w = within_radius * rand::thread_rng().gen_range(0.0, 1.0);
+    let t = 2.0 * PI * rand::thread_rng().gen_range(0.0, 1.0);
+    Point2::new(origin.x + w * t.cos(), origin.y + w * t.sin())
+}