From 679580a394facee46f7ec1bf5aae96af56f3923a Mon Sep 17 00:00:00 2001
From: Rezmason <jeremysachs@rezmason.net>
Date: Sat, 24 Sep 2022 07:16:01 -0700
Subject: [PATCH] =?UTF-8?q?Theatrics=E2=80=94=20first=20column=20is=20in?=
 =?UTF-8?q?=20the=20middle,=20next=20one's=20over=20to=20the=20side,=20the?=
 =?UTF-8?q?n=20they=20all=20join=20in?=
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---
 shaders/glsl/rainPass.intro.frag.glsl | 12 ++++++++++--
 shaders/wgsl/rainPass.wgsl            | 12 ++++++++++--
 2 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/shaders/glsl/rainPass.intro.frag.glsl b/shaders/glsl/rainPass.intro.frag.glsl
index b09bc9f..410d50c 100644
--- a/shaders/glsl/rainPass.intro.frag.glsl
+++ b/shaders/glsl/rainPass.intro.frag.glsl
@@ -41,8 +41,16 @@ vec4 computeResult(float simTime, bool isFirstFrame, vec2 glyphPos, vec2 screenP
 		return vec4(1., 0., 0., 0.);
 	}
 
-	float columnTimeOffset = randomFloat(vec2(glyphPos.x, 0.)) * -10.;
-	columnTimeOffset += sin(glyphPos.x / numColumns * PI) - 1.;
+	float columnTimeOffset;
+	int column = int(glyphPos.x);
+	if (column == int(numColumns / 2.)) {
+		columnTimeOffset = -1.;
+	} else if (column == int(numColumns * 0.75)) {
+		columnTimeOffset = -2.;
+	} else {
+		columnTimeOffset = randomFloat(vec2(glyphPos.x, 0.)) * -4.;
+		columnTimeOffset += (sin(glyphPos.x / numColumns * PI) - 1.) * 2. - 2.5;
+	}
 	float introTime = (simTime + columnTimeOffset) * fallSpeed / numRows * 100.;
 
 	vec4 result = vec4(introTime, 0., 0., 0.);
diff --git a/shaders/wgsl/rainPass.wgsl b/shaders/wgsl/rainPass.wgsl
index eb42d09..9935ca2 100644
--- a/shaders/wgsl/rainPass.wgsl
+++ b/shaders/wgsl/rainPass.wgsl
@@ -221,8 +221,16 @@ fn computeIntro (simTime : f32, isFirstFrame : bool, glyphPos : vec2<f32>, scree
 		return vec4<f32>(1.0, 0.0, 0.0, 0.0);
 	}
 
-	var columnTimeOffset = randomFloat(glyphPos) * -10.0;
-	columnTimeOffset += sin(glyphPos.x / config.gridSize.x * PI) - 1.0;
+	var columnTimeOffset = 0.0;
+	var column = i32(glyphPos.x);
+	if (column == i32(config.gridSize.y / 2.0)) {
+		columnTimeOffset = -1.0;
+	} else if (column == i32(config.gridSize.y * 0.75)) {
+		columnTimeOffset = -2.0;
+	} else {
+		columnTimeOffset = randomFloat(vec2(glyphPos.x, 0.)) * -4.;
+		columnTimeOffset += (sin(glyphPos.x / config.gridSize.y * PI) - 1.) * 2. - 2.5;
+	}
 	var introTime = (simTime + columnTimeOffset) * config.fallSpeed / config.gridSize.y * 100.0;
 
 	var result = vec4<f32>(introTime, 0.0, 0.0, 0.0);