From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Tue, 10 May 2022 20:11:04 +0000 (+0100)
Subject: impl Mean for f64
X-Git-Tag: otter-1.1.0~238
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=afe06c86154ea77b61f9440b529f061cf04042e3;p=otter.git

impl Mean for f64

We'll want this to calculate middles of SVGs.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---

diff --git a/base/geometry.rs b/base/geometry.rs
index 2733632e..6983a3a0 100644
--- a/base/geometry.rs
+++ b/base/geometry.rs
@@ -85,6 +85,9 @@ pub trait Mean { fn mean(&self, other: &Self) -> Self; }
 impl Mean for i32 { fn mean(&self, other: &Self) -> Self {
   ((*self as i64 + *other as i64) / 2) as i32
 } }
+impl Mean for f64 { fn mean(&self, other: &Self) -> Self {
+  self * 0.5 + other * 0.5
+} }
 
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