Mesh v3 format support. (#101)

This adds support for reading the v3 `.mesh` format that the original
polyanya authors use. I didn't add support for writing to the v3 format.

The 35 meshes and accompanying pathfinding scenarios from Iron Harvest
(https://bitbucket.org/shortestpathlab/benchmarks/src/master/mesh-maps/iron-harvest/)
are provided in a bunch of different formats making them useful for
benchmarking and comparing different pathfinding libraries (mainly due
to having both grid and navmesh formats with the same scenarios).

Closes #100

Author: Elabajaba

benches/baking.rs

@@ -2,7 +2,7 @@ use criterion::{criterion_group, criterion_main, Criterion};
 use polyanya::{Mesh, PolyanyaFile};
 
 fn baking(c: &mut Criterion) {
-    let mut mesh: Mesh = PolyanyaFile::from_file("meshes/aurora-merged.mesh")
+    let mut mesh: Mesh = PolyanyaFile::from_file("meshes/v2/aurora-merged.mesh")
         .try_into()
         .unwrap();
     c.bench_function(&"baking".to_string(), |b| {

benches/is_in_mesh.rs

@@ -3,7 +3,7 @@ use glam::Vec2;
 use polyanya::{Mesh, PolyanyaFile};
 
 fn is_in_mesh(c: &mut Criterion) {
-    let mesh: Mesh = PolyanyaFile::from_file("meshes/aurora-merged.mesh")
+    let mesh: Mesh = PolyanyaFile::from_file("meshes/v2/aurora-merged.mesh")
         .try_into()
         .unwrap();
     [
@@ -25,7 +25,7 @@ fn is_in_mesh(c: &mut Criterion) {
 }
 
 fn is_not_in_mesh(c: &mut Criterion) {
-    let mesh: Mesh = PolyanyaFile::from_file("meshes/aurora-merged.mesh")
+    let mesh: Mesh = PolyanyaFile::from_file("meshes/v2/aurora-merged.mesh")
         .try_into()
         .unwrap();
     [

benches/no_path.rs

@@ -3,7 +3,7 @@ use glam::Vec2;
 use polyanya::{Mesh, PolyanyaFile};
 
 fn no_path(c: &mut Criterion) {
-    let mesh: Mesh = PolyanyaFile::from_file("meshes/aurora-merged.mesh")
+    let mesh: Mesh = PolyanyaFile::from_file("meshes/v2/aurora-merged.mesh")
         .try_into()
         .unwrap();
     [

benches/path.rs

@@ -13,7 +13,7 @@ macro_rules! assert_delta {
 }
 
 fn get_path(c: &mut Criterion) {
-    let mesh: Mesh = PolyanyaFile::from_file("meshes/aurora-merged.mesh")
+    let mesh: Mesh = PolyanyaFile::from_file("meshes/v2/aurora-merged.mesh")
         .try_into()
         .unwrap();
     [

examples/aurora.rs

@@ -18,7 +18,7 @@ fn main() {
     )
     .expect("set up the subscriber");
 
-    let mesh: Mesh = PolyanyaFile::from_file("meshes/aurora-merged.mesh")
+    let mesh: Mesh = PolyanyaFile::from_file("meshes/v2/aurora-merged.mesh")
         .try_into()
         .unwrap();
     assert_delta!(

examples/tests-aurora-merged.rs

@@ -17,7 +17,7 @@ macro_rules! assert_delta {
 
 #[cfg(test)]
 fn aurora_mesh() -> Mesh {
-    PolyanyaFile::from_file("meshes/aurora-merged.mesh")
+    PolyanyaFile::from_file("meshes/v2/aurora-merged.mesh")
         .try_into()
         .unwrap()
 }

examples/tests-aurora.rs

@@ -17,7 +17,7 @@ macro_rules! assert_delta {
 
 #[cfg(test)]
 fn aurora_mesh() -> Mesh {
-    PolyanyaFile::from_file("meshes/aurora.mesh")
+    PolyanyaFile::from_file("meshes/v2/aurora.mesh")
         .try_into()
         .unwrap()
 }

examples/traced/src/bin/paths.rs

@@ -10,7 +10,7 @@ fn main() {
     let mesh: Mesh = {
         let _execution_span: tracing::span::EnteredSpan =
             tracing::info_span!("loading mesh").entered();
-        PolyanyaFile::from_file("meshes/aurora-merged.mesh")
+        PolyanyaFile::from_file("meshes/v2/aurora-merged.mesh")
             .try_into()
             .unwrap()
     };