From b3d08eceb18468a8a464fc56fb2a9f2ac1754517 Mon Sep 17 00:00:00 2001
From: Jeffrey Pfau <jeffrey@endrift.com>
Date: Sun, 8 Nov 2015 17:10:10 -0800
Subject: [PATCH] Shaders: Add uniforms to AGS-001

---
 res/shaders/ags001.shader/ags001-light.fs | 25 +++++++++++++++++------
 res/shaders/ags001.shader/manifest.ini    | 13 ++++++++++++
 2 files changed, 32 insertions(+), 6 deletions(-)

diff --git a/res/shaders/ags001.shader/ags001-light.fs b/res/shaders/ags001.shader/ags001-light.fs
index 87779acde..5d2e6f8a5 100644
--- a/res/shaders/ags001.shader/ags001-light.fs
+++ b/res/shaders/ags001.shader/ags001-light.fs
@@ -1,14 +1,27 @@
 varying vec2 texCoord;
 uniform sampler2D tex;
+uniform float reflectionBrightness;
+uniform vec2 reflectionDistance;
+uniform float lightBrightness;
+
+const float speed = 2.0;
+const float decay = 2.0;
+const float coeff = 2.5;
 
 void main() {
-	vec4 color = texture2D(tex, texCoord);
-	vec4 reflection = texture2D(tex, texCoord - vec2(0, 0.025));
+	float sp = pow(speed, lightBrightness);
+	float dc = pow(decay, -lightBrightness);
+	float s = (sp - dc) / (sp + dc);
+	vec2 radius = (texCoord.st - vec2(0.5, 0.5)) * vec2(coeff * s);
+	radius = pow(radius, vec2(4.0));
 	vec3 bleed = vec3(0.12, 0.14, 0.19);
-	vec2 radius = (texCoord.st - vec2(0.5, 0.5)) * vec2(1.6, 1.6);
-	bleed += (dot(pow(radius, vec2(4.0)), pow(radius, vec2(4.0))) + vec3(0.02, 0.03, 0.05)) * vec3(0.14, 0.18, 0.2);
-	color.rgb += bleed;
-	color.rgb += reflection.rgb * 0.07;
+	bleed += (dot(radius, radius) + vec3(0.02, 0.03, 0.05)) * vec3(0.14, 0.18, 0.2);
+
+	vec4 color = texture2D(tex, texCoord);
+	color.rgb += pow(bleed, pow(vec3(lightBrightness), vec3(-0.5)));
+
+	vec4 reflection = texture2D(tex, texCoord - reflectionDistance);
+	color.rgb += reflection.rgb * reflectionBrightness;
 	color.a = 1.0;
 	gl_FragColor = color;
 }
diff --git a/res/shaders/ags001.shader/manifest.ini b/res/shaders/ags001.shader/manifest.ini
index 2237d91a6..d0f034e8a 100644
--- a/res/shaders/ags001.shader/manifest.ini
+++ b/res/shaders/ags001.shader/manifest.ini
@@ -14,3 +14,16 @@ height=640
 fragmentShader=ags001-light.fs
 width=960
 height=640
+
+[uniform.lightBrightness]
+type=float
+default=1
+
+[uniform.reflectionBrightness]
+type=float
+default=0.07
+
+[uniform.reflectionDistance]
+type=float2
+default[0]=0
+default[1]=0.025