Nml parser should parse float coordinates of nodes (#4045)

* round float values for node positions

* pr feedback changelog entry #4045

CHANGELOG.md

@@ -14,7 +14,7 @@ For upgrade instructions, please check the [migration guide](MIGRATIONS.md).
 - 
 
 ### Changed
-- 
+- The NML parser now rounds floating point values in node coordinates. [#4045](https://github.com/scalableminds/webknossos/pull/4045)
 
 ### Fixed
 - 

app/models/annotation/nml/NmlParser.scala

@@ -193,12 +193,16 @@ object NmlParser extends LazyLogging with ProtoGeometryImplicits {
         }
     }
 
-  private def parsePoint3D(node: XMLNode) =
+  private def parsePoint3D(node: XMLNode) = {
+    val xText = (node \ "@x").text
+    val yText = (node \ "@y").text
+    val zText = (node \ "@x").text
     for {
-      x <- (node \ "@x").text.toIntOpt
-      y <- (node \ "@y").text.toIntOpt
-      z <- (node \ "@z").text.toIntOpt
+      x <- xText.toIntOpt.orElse(xText.toFloatOpt.map(math.round))
+      y <- yText.toIntOpt.orElse(yText.toFloatOpt.map(math.round))
+      z <- zText.toIntOpt.orElse(zText.toFloatOpt.map(math.round))
     } yield Point3D(x, y, z)
+  }
 
   private def parseRotationForParams(node: XMLNode) =
     for {