add draft weather/environment system

1 files changed, 18 insertions, 1 deletions

diff --git a/server/src/lib.rs b/server/src/lib.rs
index a59aad11..2cbcc10b 100644
--- a/server/src/lib.rs
+++ b/server/src/lib.rs
@@ -20,5 +20,22 @@ pub mod data;
 pub mod entity;
 pub mod game;
 pub mod interaction;
-pub mod state;
 pub mod spatial_index;
+pub mod state;
+
+use hurrycurry_protocol::glam::Vec2;
+
+pub trait InterpolateExt {
+    fn exp_to(&mut self, target: Self, dt: f32);
+}
+impl InterpolateExt for Vec2 {
+    fn exp_to(&mut self, target: Self, dt: f32) {
+        self.x = target.x + (self.x - target.x) * (-dt).exp();
+        self.y = target.y + (self.y - target.y) * (-dt).exp();
+    }
+}
+impl InterpolateExt for f32 {
+    fn exp_to(&mut self, target: Self, dt: f32) {
+        *self = target + (*self - target) * (-dt).exp();
+    }
+}