made painter actually how I wanted it (draw now takes in an owned painter)

src/render/primitive.rs

@@ -61,6 +61,12 @@ macro_rules! primitives {
             }
         }
 
+        impl PrimitiveData {
+            pub fn clear(&mut self) {
+                $(self.$name.clear();)*
+            }
+        }
+
         $(
             unsafe impl bytemuck::Pod for $ty {}
             unsafe impl bytemuck::Zeroable for $ty {}
@@ -87,6 +93,12 @@ impl Primitives {
         });
         vec.push(data);
     }
+
+    pub(crate) fn clear(&mut self) {
+        self.updated = true;
+        self.instances.clear();
+        self.data.clear();
+    }
 }
 
 primitives!(