fixes for small entities

1 files changed, 9 insertions, 5 deletions

diff --git a/src/sim/rb_manager/mod.rs b/src/sim/rb_manager/mod.rs
index efb25f9..3711b80 100644
--- a/src/sim/rb_manager/mod.rs
+++ b/src/sim/rb_manager/mod.rs
@@ -80,13 +80,13 @@ impl RbManager {
 
     fn polyline_from_marchable(
         marchable: &impl Marchable,
-        minimum_verts: Option<u32>,
+        minimum_verts_per_poly: Option<u32>,
     ) -> (Vec<Vec2>, Vec<[u32; 2]>) {
         let polys = marching_squares_vertex_trace(marchable);
         let mut vertices = Vec::new();
         let mut indices = Vec::new();
 
-        let minimum_verts = minimum_verts.unwrap_or(3);
+        let minimum_verts = minimum_verts_per_poly.unwrap_or(3);
 
         let centre_offset = (marchable.size() / 2).as_vec2() - 0.5;
 
@@ -116,11 +116,15 @@ impl RbManager {
 
     pub fn convex_hull_collider_from_marchable(
         marchable: &impl Marchable,
-        minimum_verts: Option<u32>,
+        minimum_verts_per_poly: Option<u32>,
     ) -> geometry::ColliderBuilder {
         puffin::profile_function!();
-        let (vertices, indices) = RbManager::polyline_from_marchable(marchable, minimum_verts);
-        {
+        let (vertices, indices) =
+            RbManager::polyline_from_marchable(marchable, minimum_verts_per_poly);
+        // convex_decomposition will panic if we have fewer verts
+        if vertices.len() < 3 {
+            panic!("Too few vertices to build collider!");
+        } else {
             puffin::profile_scope!("Convex decomposition");
             // TODO there are some pathological cases here that are taking 5ms+
             geometry::ColliderBuilder::convex_decomposition(&vertices, &indices)