change PhysicsMesh::from to PhysicsMesh::try_from

src/model_physics.rs

@@ -280,9 +280,24 @@ impl EdgePool{
 		(&mut unsafe{self.edge_guys.get_unchecked_mut(edge_id.get() as usize)}.1,edge_id)
 	}
 }
-impl From<&model::Mesh> for PhysicsMesh{
-	fn from(mesh:&model::Mesh)->Self{
-		assert!(mesh.unique_pos.len()!=0,"Mesh cannot have 0 vertices");
+
+#[derive(Debug)]
+pub enum PhysicsMeshError{
+	ZeroVertices,
+}
+impl std::fmt::Display for PhysicsMeshError{
+	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+		write!(f,"{self:?}")
+	}
+}
+impl std::error::Error for PhysicsMeshError{}
+
+impl TryFrom<&model::Mesh> for PhysicsMesh{
+	type Error=PhysicsMeshError;
+	fn try_from(mesh:&model::Mesh)->Result<Self,PhysicsMeshError>{
+		if mesh.unique_pos.len()==0{
+			return Err(PhysicsMeshError::ZeroVertices);
+		}
 		let verts=mesh.unique_pos.iter().copied().map(Vert).collect();
 		//TODO: fix submeshes
 		//flat map mesh.physics_groups[$1].groups.polys()[$2] as face_id
@@ -384,14 +399,14 @@ impl From<&model::Mesh> for PhysicsMesh{
 				).collect(),
 			}
 		}).collect();
-		Self{
+		Ok(Self{
 			data:PhysicsMeshData{
 				faces,
 				verts,
 			},
 			complete_mesh:mesh_topologies.pop().unwrap(),
 			submeshes:mesh_topologies,
-		}
+		})
 	}
 }
 

src/physics.rs

@@ -1012,10 +1012,18 @@ impl PhysicsContext{
 				mesh_id
 			}else{
 				match map.meshes.get(model.mesh.get() as usize).and_then(|mesh|{
+					match PhysicsMesh::try_from(mesh){
+						Ok(physics_mesh)=>{
 							let mesh_id=PhysicsMeshId::new(used_meshes.len() as u32);
-					used_meshes.push(PhysicsMesh::from(mesh));
+							used_meshes.push(physics_mesh);
 							physics_mesh_id_from_model_mesh_id.insert(model.mesh,mesh_id);
 							Some(mesh_id)
+						},
+						Err(e)=>{
+							println!("Failed to build PhysicsMesh: {e}");
+							None
+						}
+					}
 				}){
 					Some(mesh_id)=>mesh_id,
 					None=>return None,