Change to polygongraph instead of polygon in roomtool

The polygon room tool used a convoluted process for determining what the
user actually wants to draw. I have changed to the polygon graph
instead, which makes the checks easier and restricts the user a bit
less. In the process however I found a serious problem with my handling
float, so everything needed to change to margin compares (which I of
course should have done in the beginning. Guys, take the warning
seriously and don't ignore it for ten years like I did. It will come
back to haunt you.. apparently) instead of direct equality.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/tool/rect_room_tool.rs b/src/tool/rect_room_tool.rs
index 7cb85bb..9445787 100644
--- a/src/tool/rect_room_tool.rs
+++ b/src/tool/rect_room_tool.rs
@@ -19,6 +19,7 @@ pub struct RectRoomTool {
 impl RectRoomTool {
     /// Create a new room tool where no rooms have been drawn yet. Should be created only once per
     /// program instance and by the editor.
+    #[allow(clippy::new_without_default)]
     pub fn new() -> Self {
         Self {
             unfinished_rect: None,