# HG changeset patch
# User Eleni Maria Stea <elene.mst@gmail.com>
# Date 1398364406 -10800
# Node ID c4662d60cd9357524013d6ca0dd62a92e52e2995
# Parent  930c063ae3462c3ae80daf9ab11345e71d4026e5
foo

diff -r 930c063ae346 -r c4662d60cd93 data/shaders/transfer.f.glsl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/data/shaders/transfer.f.glsl	Thu Apr 24 21:33:26 2014 +0300
@@ -0,0 +1,18 @@
+uniform sampler3D tex;
+uniform float tmin;
+uniform float tmax;
+
+float transfer(float x, float tmin, float tmax)
+{
+	float dt = 0.25 * (tmax - tmin);
+	return smoothstep(tmin - dt, tmin + dt, x) *
+		(1.0 - smoothstep(tmax - dt, tmax + dt, x));
+}
+
+void main()
+{
+	float texel = texture3D(tex, gl_TexCoord[0].xyz).x;
+	float val = transfer(texel, tmin, tmax);
+
+	gl_FragColor = vec4(val, val, val, 1.0);
+}
diff -r 930c063ae346 -r c4662d60cd93 data/shaders/transfer.v.glsl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/data/shaders/transfer.v.glsl	Thu Apr 24 21:33:26 2014 +0300
@@ -0,0 +1,5 @@
+void main()
+{
+	gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
+	gl_TexCoord[0] = gl_MultiTexCoord0;
+}