Add have pixel offset to selection bounding box

Author: TrueDoctor

editor/src/tool/tools/select.rs

@@ -129,7 +129,10 @@ impl Fsm for SelectToolFsmState {
 						(Some([pos1, pos2]), path) => {
 							let path = path.unwrap_or_else(|| add_boundnig_box(responses));
 							data.bounding_box_id = Some(path.clone());
-							let transform = transform_from_box(pos1, pos2);
+							let half_pixel_offset = DVec2::splat(0.5);
+							let start = pos1 + half_pixel_offset;
+							let size = pos2 - start + half_pixel_offset;
+							let transform = transform_from_box(start, size);
 							Operation::SetLayerTransformInViewport { path, transform }.into()
 						}
 						(_, _) => Message::NoOp,
@@ -179,7 +182,7 @@ impl Fsm for SelectToolFsmState {
 				}
 				(DrawingBox, MouseMove) => {
 					data.drag_current = input.mouse.position;
-					let half_pixel_offset = DVec2::new(0.5, 0.5);
+					let half_pixel_offset = DVec2::splat(0.5);
 					let start = data.drag_start + half_pixel_offset;
 					let size = data.drag_current - start + half_pixel_offset;