progress

gpx-rs/src/algorithms/smooth.rs

@@ -0,0 +1,39 @@
+#[macro_export]
+macro_rules! for_each_window {
+    (
+        $left:expr,
+        $right:expr,
+        $window:expr,
+        |$a:ident, $b:ident| $distance:expr,
+        |$i:ident, $l:ident, $r:ident| $body:block,
+    ) => {{
+        let mut start = $left;
+
+        for $i in $left..$right {
+            while start + 1 < $i && {
+                let $a = start;
+                let $b = $i;
+                $distance
+            } > $window
+            {
+                start += 1;
+            }
+
+            let mut end = $right.min($i + 2);
+
+            while end < $right && {
+                let $a = $i;
+                let $b = end;
+                $distance
+            } <= $window
+            {
+                end += 1;
+            }
+
+            let $l = start;
+            let $r = end - 1;
+
+            $body
+        }
+    }};
+}