X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=builtin_data%2F_ambientocclusion.glsl;h=ecdaed7a46256e1101cc5b332d8ad2001f6b499c;hb=177f7a345c615e5934af16c97abde59127113b4c;hp=81aac182acb4683412d429d7d33b58938bdd1722;hpb=e6bb00e2d6b817b81a555b6cbebe3ba4ec28cf80;p=libs%2Fgl.git

diff --git a/builtin_data/_ambientocclusion.glsl b/builtin_data/_ambientocclusion.glsl
index 81aac182..ecdaed7a 100644
--- a/builtin_data/_ambientocclusion.glsl
+++ b/builtin_data/_ambientocclusion.glsl
@@ -1,4 +1,4 @@
-const int max_samples = 32;
+const int max_samples = 128;
 
 uniform CameraTransform
 {
@@ -35,3 +35,15 @@ vec3 unproject(vec3 position)
 	vec4 upp = eye_clip_matrix*vec4(position, 1.0);
 	return upp.xyz/upp.w;
 }
+
+vec3 get_fragment_position(vec2 tc)
+{
+	return unproject(vec3(tc*2.0-1.0, texture(depth, tc).r));
+}
+
+vec3 get_slope(vec3 a, vec3 x, vec3 b)
+{
+	float dz1 = abs(x.z-a.z);
+	float dz2 = abs(b.z-x.z);
+	return (dz1>2.0*dz2 ? b-x : dz2>2.0*dz1 ? x-a : b-a);
+}