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, 9 insertions, 0 deletions

diff --git a/src/main.rs b/src/main.rs
index 8c1d63e..16afe1f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -36,6 +36,7 @@ pub mod transformable;
 
 use config::Config;
 use editor::Editor;
+use float_cmp::F64Margin;
 use gui::{DimensionIndicator, ToolSidebar};
 use raylib::prelude::*;
 use std::ffi::CString;
@@ -47,6 +48,14 @@ pub const GUI_STYLE: &str = "assets/style/cyber.rgs";
 /// Location of the graf karto configuration options file.
 pub const CONFIG_FILE: &str = "config.ron";
 
+/// The acceptable error that is used throughout the project for two floats to be considered equal.
+/// If it is set too low, the editor might not work properly, if set too high, the granularity may
+/// become too low for certain purposes.
+pub const FLOAT_MARGIN: F64Margin = F64Margin {
+    epsilon: 10000. * f64::EPSILON,
+    ulps: 0,
+};
+
 fn main() {
     pretty_env_logger::init();