In
[`TweenController`](file:///home/dietrich/Projekte/Source/turtlers/turtle-lib/src/tweening.rs),
commands are currently accumulated in `queue: CommandQueue` (which wraps
a `Vec<TurtleCommand>`). When commands execute in `update()`, an
internal `cursor: usize` increments, but executed commands are never
removed. In streaming and threaded applications (such as
[`examples/clock_threaded.rs`](file:///home/dietrich/Projekte/Source/turtlers/turtle-lib/examples/clock_threaded.rs)),
new commands are appended continuously, causing `queue` to grow
unboundedly over time and exhaust memory.
We will replace `queue: CommandQueue` and `cursor: usize` with `queue:
std::collections::VecDeque<TurtleCommand>` inside `TweenController`.
Consumed commands will be removed immediately using `pop_front()`,
completely freeing memory as commands complete.
> [!NOTE]
> All design decisions were aligned during the `/grill-me` session:
> - `TweenController` will internally store
`std::collections::VecDeque<TurtleCommand>` and consume items via
`pop_front()`.
> - `self.cursor` is eliminated entirely.
> - `CommandQueue` remains the public API container for passing
batches of commands into `TweenController::new` and
`TweenController::append_commands`.
> - `TurtleCommand::Reset` retains its normal semantics (clearing
drawings and parameters without clearing future queued commands), as
continuous `pop_front()` already discards consumed commands.
> - Standard `VecDeque` capacity behavior is maintained (no
auto-shrinking) to prevent reallocation jitter in streaming scenarios.
[tweening.rs](file:///home/dietrich/Projekte/Source/turtlers/turtle-lib/src/tweening.rs)
- Import `std::collections::VecDeque`.
- Update `TweenController` struct definition:
- Replace `queue: CommandQueue` and `cursor: usize` with `queue:
VecDeque<TurtleCommand>`.
- In `TweenController::new`:
- Initialize `queue` using `queue.into_iter().collect()`.
- Remove `cursor` initialization.
- In `TweenController::append_commands`:
- Extend `self.queue` directly from `new_queue: CommandQueue`.
- In `TweenController::update`:
- **Instant mode**: Replace `while let Some(command) =
self.queue.get(self.cursor).cloned()` with `while let Some(command)
= self.queue.pop_front()`, removing `self.cursor += 1` and
unnecessary command cloning.
- **Animated mode**: Replace `if let Some(command) =
self.queue.get(self.cursor).cloned()` with `if let Some(command) =
self.queue.pop_front()`, removing `self.cursor += 1` and unnecessary
command cloning.
- In `TweenController::is_complete`:
- Update check to `self.current_tween.is_none() &&
self.queue.is_empty()`.
- Add unit tests in `#[cfg(test)] mod tests`:
- Verify queue drains to 0 length in Instant mode.
- Verify queue drains in Animated mode with multiple frames.
- Verify streaming `append_commands` calls continuously drain and do
not accumulate.
- Verify `is_complete()` transitions correctly.
---
[commands.rs](file:///home/dietrich/Projekte/Source/turtlers/turtle-lib/src/commands.rs)
- Update doc comments referencing `TweenController`'s cursor to reflect
the queue consumption model.
- Run `cargo test -p turtle-lib --lib tweening` to execute the new unit
tests.
- Run `cargo test -p turtle-lib` to ensure all existing tests in
`turtle-lib` continue to pass.
- Run `cargo check --examples` to ensure all examples (including
`clock_threaded.rs`) compile cleanly.
- Review memory behavior or run `examples/clock_threaded.rs` in debug to
confirm streaming updates run smoothly.
- Added tessellation module to handle path tessellation using Lyon.
- Updated execution logic to record fill vertices and manage fill contours.
- Integrated tessellation into command execution for lines, arcs, and filled shapes.
- Enhanced TurtleState to track fill state and contours.
- Modified TweenController to handle fill commands and update drawing commands accordingly.
- Improved debug output for fill operations and tessellation processes.
dietrich