tree dissolve + instances

src/snow.rs

@@ -505,10 +505,23 @@ impl SnowLayer
             })
         });
 
+        let mut aabb_min = Vec3::splat(f32::MAX);
+        let mut aabb_max = Vec3::splat(f32::MIN);
+        for v in &vertices
+        {
+            let p = Vec3::from(v.position);
+            aabb_min = aabb_min.min(p);
+            aabb_max = aabb_max.max(p);
+        }
+
         Mesh {
             vertex_buffer,
             index_buffer,
             num_indices: indices.len() as u32,
+            aabb_min,
+            aabb_max,
+            cpu_positions: Vec::new(),
+            cpu_indices: Vec::new(),
         }
     }
 
@@ -568,6 +581,7 @@ impl SnowLayer
                 enable_dissolve: false,
                 enable_snow_light: true,
                 displacement_bind_group: Some(self.displacement_bind_group.clone()),
+                entity: None,
             })
             .collect()
     }