X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=shaderlib%2Fambientocclusion_combine.glsl;fp=shaderlib%2Fambientocclusion_combine.glsl;h=572ba2f14bcf73858c3b500d992ffebafa14d3db;hp=0000000000000000000000000000000000000000;hb=e55f79ccb21e8c1be3d86f127e3ec1583e58ce92;hpb=b2764a3a349b48d7445202faa903383386c09a4c

diff --git a/shaderlib/ambientocclusion_combine.glsl b/shaderlib/ambientocclusion_combine.glsl
new file mode 100644
index 00000000..572ba2f1
--- /dev/null
+++ b/shaderlib/ambientocclusion_combine.glsl
@@ -0,0 +1,23 @@
+import postprocess;
+import ambientocclusion;
+
+////// fragment
+void main()
+{
+	float sample = depth_ratio.x/(texture(depth, texcoord).r-depth_ratio.y);
+	float sum = 1.0;
+	float count = 1.0;
+	for(int i=0; i<=3; ++i)
+		for(int j=0; j<=3; ++j)
+		{
+			vec2 offs = vec2(float(i)-1.5, float(j)-1.5)/screen_size;
+			float dxy = length(offs)*-sample;
+			float dz = depth_ratio.x/(texture(depth, texcoord+offs).r-depth_ratio.y)-sample;
+			if(abs(dz)<3.0*dxy)
+			{
+				sum += texture(occlusion, texcoord+offs).r;
+				count += 1.0;
+			}
+		}
+	frag_color = texture(source, texcoord)*sum/count;
+}