From ede5386d53a453cb56c9b1c80de0a80322ddc6f1 Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Mon, 17 Dec 2018 19:09:25 +0100
Subject: Try out velocity norm color mapping

---
 src/shader/code/vertex.glsl | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'src/shader/code/vertex.glsl')

diff --git a/src/shader/code/vertex.glsl b/src/shader/code/vertex.glsl
index 453b6fa..516f2c6 100644
--- a/src/shader/code/vertex.glsl
+++ b/src/shader/code/vertex.glsl
@@ -7,8 +7,16 @@ out VS_OUT {
 	vec3 color;
 } vs_out;
 
+float unit(float x) {
+	return 1.0/(1.0+exp(-x));
+}
+
+vec3 getColor(float x) {
+	return x*vec3(1.0,0.0,0.0) + (1-x)*vec3(-0.5,0.0,1.0);
+}
+
 void main() {
 	gl_Position  = vec4(VertexPosition.xy, 0., 1.);
-	vs_out.color = vec3(VertexPosition.z, 0., 0.);
+	vs_out.color = getColor(unit(VertexPosition.z));
 }
 )";
-- 
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