first commit

shaderpacks/Reimagined - High/shaders/lib/antialiasing/jitter.glsl

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+// Jitter offset from Chocapic13
+vec2 jitterOffsets[8] = vec2[8](
+                        vec2( 0.125,-0.375),
+                        vec2(-0.125, 0.375),
+                        vec2( 0.625, 0.125),
+                        vec2( 0.375,-0.625),
+                        vec2(-0.625, 0.625),
+                        vec2(-0.875,-0.125),
+                        vec2( 0.375,-0.875),
+                        vec2( 0.875, 0.875)
+                        );
+
+vec2 TAAJitter(vec2 coord, float w) {
+    #if TAA_JITTER > 0
+        vec2 offset = jitterOffsets[int(framemod8)] * (w / vec2(viewWidth, viewHeight));
+        #if TAA_JITTER == 1
+            offset *= 0.125;
+        #elif TAA_JITTER == 2
+            offset *= 0.33;
+        #endif
+        return coord + offset;
+    #else
+        return coord;
+    #endif
+}