better lighting

pxl8d/src/world.rs

@@ -38,10 +38,6 @@ impl World {
         self.chunks.remove(id)
     }
 
-    pub fn set_active(&mut self, id: ChunkId) {
-        self.active = Some(id);
-    }
-
     pub fn active(&self) -> Option<&Chunk> {
         self.active.as_ref().and_then(|id| self.chunks.get(id))
     }
@@ -50,6 +46,14 @@ impl World {
         self.active
     }
 
+    pub fn set_active(&mut self, id: ChunkId) {
+        self.active = Some(id);
+    }
+
+    pub fn clear_active(&mut self) {
+        self.active = None;
+    }
+
     pub fn trace(&self, from: Vec3, to: Vec3, radius: f32) -> Vec3 {
         if let Some(chunk) = self.active() {
             return chunk.trace(from, to, radius);