render: SSAO

internal/asset/shader/world/ssao_blur.frag

@@ -0,0 +1,20 @@
+#version 330
+
+uniform sampler2D input;
+uniform vec2 screenSize;
+
+
+in vec2 fragPosScreen;
+layout (location = 0) out float output;
+
+
+void main() {
+	output = 0;
+
+	for (int i = -3; i <= 3; i++)
+		for (int j = -3; j <= 3; j++)
+			output += texture(input, fragPosScreen + vec2(i, j) / screenSize).r;
+
+	output /= 49.0;
+}
+