From ab45b5857d948faa6cd2e32b84d3e8ec663c93f3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=BE=E6=B5=A6=20=E7=9F=A5=E4=B9=9F=20Matsuura=20Tomoy?=
 =?UTF-8?q?a?= <me@matsuuratomoya.com>
Date: Wed, 27 Aug 2025 17:29:08 +0900
Subject: [PATCH] [obsidian] vault backup: 2025-08-27 17:29:08[

---
 content/otopoiesis.md | 65 ++++++++++++++++++++++++++++++++-----------
 1 file changed, 49 insertions(+), 16 deletions(-)

diff --git a/content/otopoiesis.md b/content/otopoiesis.md
index baa17b57..dc21a98d 100644
--- a/content/otopoiesis.md
+++ b/content/otopoiesis.md
@@ -64,8 +64,8 @@ type Generator<T> = iVec<T>
 
 ```
 //Freq440Hz,Gain1.0,Phase0.0
-let Track1 = Generator::SineWave(Constant(440),Constant(1.0),Constant(0.0));
-let Track2 = Generator::SineWave(Track1,Constant(1.0),Constant(0.0));
+let t1 = Track(Generator::SineWave(Constant(440),Constant(1.0),Constant(0.0)));
+let t2 = Track(Generator::SineWave(t1,Constant(1.0),Constant(0.0)));
 ```
 これをあんまり動的ディスパッチじゃない感じで実装したい。そしてこの辺までは別にMaxとかと同じレベルの話
 
@@ -76,19 +76,50 @@ CubaseにおけるインストゥルメントトラックとかはMIDIトラッ
 
 ## 考えうるユースケース
 
+```rust
+type Region = {
+ start:float,
+ dur:float,
+ content: ()->float,
+} 
+```
+
+### 一般的なリージョンエフェクト
+
+```rust
+type alias FX = ({s:float,start:float,dur:float})->float
+fn region_transformer(origin:Region,fx:FX) -> 'Region{
+	let start = origin.start
+	let dur = origin.dur
+	 'Region{
+		start:$start,
+		dur:$dur,
+		content: || {s:$origin.content(),start:$start,dur:$dur} |> $fx
+	}
+}
+```
+
 ### リージョンに対するFadeInOut
 
 ```rust
-fn fade_inout(origin:Region)->Region{
-	let time_in = Param(0.0,"fade_in",0..=f64::MAX);
-	let time_out = Param(0.0,"fade_out",0..=f64::MAX);
-	//クロージャとして値を閉じ込める
-	let new_generator = |s| apply_fadeinout(s,time_in,time_out);
-	Region{
-		start:origin.start,
-		dur:origin.dur,
-		content: compose(origin.content,new_generator)//この辺がよくわからん
-	}
+fn apply_fadeinout(s,start,tin,dur,tout){
+ let end = start+dur
+ if now < start | now > end | tin<=0 | tout <= 0{
+  0
+ }else{
+   let gain_s = min(max(now - start,0)/tin ,1)
+   let gain_e = min(max(end - now,0)/tout,1)
+   s*gain_s*gain_e // gain_sとgain_eはどちらから0~1の区間もう片方が1
+ }
+}
+fn fade_inout(origin:Region)-> 'Region{
+	let new_generator = |s,start,dur| {
+		//パラメーターはステージ１では単なる変数参照になる
+		let time_in = Param!(0.0,"fade_in",0..=f64::MAX);
+		let time_out = Param!(0.0,"fade_out",0..=f64::MAX);
+		apply_fadeinout(s,start,time_in,dur, time_out)
+	};
+	region_transformer(origin,new_generator)
 }
 ```
 
@@ -97,13 +128,15 @@ fn fade_inout(origin:Region)->Region{
 ```rust
 fn reverse(origin:Region)->Region{
 	//クロージャとして値を閉じ込める
-	let mut new_cache = vec![0;origin.get_dur_in_samples()*origin.channeks];
-	origin.render(new_cache);
-	let new_generator = |s| ;
+	let new_cache = origin |> render
+
 	Region{
 		start:origin.start,
 		dur:origin.dur,
-		content: compose(origin.content,new_generator)//この辺がよくわからん
+		content:  | | {
+			let index =  origin.dur - origin.start - now
+			new_cache[index]
+		}
 	}
 }