X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=builtin_data%2F_ambientocclusion.glsl;h=ecdaed7a46256e1101cc5b332d8ad2001f6b499c;hb=d4e380914f02800b7d915a8748ac9ccd7029bc3b;hp=dca636bb646092da6cd0a823f5fe3783186c851f;hpb=d4312ccb1a73acecc57394b2c5230083b1f8b6a1;p=libs%2Fgl.git

diff --git a/builtin_data/_ambientocclusion.glsl b/builtin_data/_ambientocclusion.glsl
index dca636bb..ecdaed7a 100644
--- a/builtin_data/_ambientocclusion.glsl
+++ b/builtin_data/_ambientocclusion.glsl
@@ -1,6 +1,12 @@
-const int max_samples = 32;
+const int max_samples = 128;
 
-uniform mat4 projection_matrix;
+uniform CameraTransform
+{
+	mat4 eye_world_matrix;
+	mat4 world_eye_matrix;
+	mat4 clip_eye_matrix;
+	mat4 eye_clip_matrix;
+};
 
 uniform sampler2D source;
 uniform sampler2D depth;
@@ -8,7 +14,6 @@ uniform sampler2D occlusion;
 uniform sampler2D rotate;
 uniform AmbientOcclusionParams
 {
-	mat4 inverse_projection;
 	float darkness;
 	vec3 sample_points[max_samples];
 	int n_samples;
@@ -21,12 +26,24 @@ vec3 project(vec3 position)
 {
 	if(position.z>=0.0)
 		return vec3(0.0, 0.0, -1.0);
-	vec4 pp = projection_matrix*vec4(position, 1.0);
+	vec4 pp = clip_eye_matrix*vec4(position, 1.0);
 	return pp.xyz/pp.w;
 }
 
 vec3 unproject(vec3 position)
 {
-	vec4 upp = inverse_projection*vec4(position, 1.0);
+	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);
+}