improoooved

mapPatchContext.js

@@ -0,0 +1,24 @@
+export function createPatchContext({ world, rects, candidateWindow, seed, patchAlpha, sourceIndexForWorld, worldIndex }) {
+  const writeRect = rects?.writeRect;
+  const writeCells = [];
+  if (world && writeRect && typeof patchAlpha === "function" && typeof sourceIndexForWorld === "function" && typeof worldIndex === "function") {
+    for (let y = writeRect.y0; y < writeRect.y1; y++) {
+      for (let x = writeRect.x0; x < writeRect.x1; x++) {
+        const wi = worldIndex(world, x, y);
+        if (wi < 0) continue;
+        const si = sourceIndexForWorld(rects, candidateWindow, x, y);
+        if (si < 0) continue;
+        const alpha = patchAlpha(x, y, rects, seed);
+        if (alpha <= 0.005) continue;
+        writeCells.push({ x, y, wi, si, alpha });
+      }
+    }
+  }
+  return {
+    world,
+    rects,
+    candidateWindow,
+    seed,
+    writeCells,
+  };
+}