From 0f379ae55e07d4e1e7904a3eb33b1c29c2177ec1 Mon Sep 17 00:00:00 2001
From: drumsetmonkey <abelleisle@roadrunner.com>
Date: Fri, 18 Dec 2015 07:32:05 -0500
Subject: Added lights

---
 test.frag | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

(limited to 'test.frag')

diff --git a/test.frag b/test.frag
index 13fe6bc..18b03df 100644
--- a/test.frag
+++ b/test.frag
@@ -1,4 +1,17 @@
-#version 120
-void main(){
-	gl_FragColor = glColor;
-}
+uniform vec2 lightLocation;
+uniform vec3 lightColor;
+uniform float screenHeight;
+
+float radius = 4.9;
+float minLight = .01;
+float a = .01;
+float b = 1.0 / (radius*radius * minLight);
+
+void main() {
+	float distance = length(lightLocation - gl_FragCoord.xy);
+	//float attenuation = 1.0 / (1.0 + a*distance + b*distance*distance);
+	float attenuation = clamp(1.0 - distance*distance/(radius*radius), 0.0, 1.0); attenuation *= attenuation;
+	vec4 color = vec4(attenuation, attenuation, attenuation, attenuation) * vec4(lightColor, 1);
+
+	gl_FragColor = color;
+}
\ No newline at end of file
-- 
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