Java was missing the motor safety thread entirely
C++ accidentally used a manual reset event, causing the motor safety thread to spin.
C++ PWMMotorController would not feed the watch kitty.
Both languages would call feed() from the StopMotor call, causing some ping ponging.
Reverts "[wpimath] Constrain Rotation2d range to -pi to pi (#4611)"
This reverts commit d1d458db2b.
This broke multiple teams code in beta. It is also easier to limit the angle externally, then reconstruct a larger angle that got limited. This additionally adds comments to clarify the behavior and retains tests that were added in the reverted commit, and fixes a javadoc comment angle reference.
For PWM motor controllers, this is going to be the fastest way to stop the motor,
as disabling the PWM output will have a small delay due to the motor controller
needing to detect the missing signal.
Note Set(0) is not a safe approach for CAN motor controllers, which may have closed
loop operation, non-% output set() calls, etc.
The Color algorithm was tweaked to:
a) not produce incorrect values if the user happens to input a hue outside the [0, 180) range, and
b) more accurately convert the hue remainder from range 0-30 to 0-255. The current conversion vastly overshoots the multiplier (converts 0-30 to 0-270) and relies on clamping the value when constructing the Color object to produce a slightly incorrect result.
Trigger was refactored to use BooleanEvent when it was introduced in #4104.
This reverts to the original implementation until edge-based BooleanEvents can be fixed.
Comparison operators which compared against every class member variable
now use C++20's default comparison operators.
Also remove operator!= that in C++20 is now auto-generated from operator==.
This leaves the file format as a list, but internally will transform the collection of tags into a map on de/serialization. The serialization will probably happen once on startup, but the tag lookup can happen 100s of times a second. This honestly probably doesn't make too much of a performance hit since N is small, but this is a simple O(n) -> O(1) change for lookups.
This is an API for looking up a Pose3d from a tag id, and includes functionality to load that map from a JSON file.
This also adds JSON support to Pose3d, Rotation3d. Translation3d, and Quaternion.
Co-authored-by: Tyler Veness <calcmogul@gmail.com>
Co-authored-by: AMereBagatelle <themerebagatelle@gmail.com>
Motivation
Feedback from 2022 showed that the Trigger API is rather confusing, mostly due to the following:
- duplicate Trigger and Button APIs were available; users were confused searching for a nonexistent difference between them.
- the when terminology was ambiguous and unclear whether it refers to the high state or specifically the rising edge.
- the Active terminology didn't unambiguously refer to the high state; it wasn't unintuitive to understand it as "when the binding is active/polled".
- whileHeld vs whenHeld was very confusing, and the difference between them wasn't obvious. The parallel Trigger verbs, whileActiveContinuously and whileActiveOnce are much less confusing.
Solution
Deprecating Button and its binding methods. The rationale for deprecating Button (and not Trigger) is because Button uses terminology that is needlessly more specific and restricting to the button use case, making the use case of arbitrary trigger conditions unintuitive.
After consideration, deprecation of Button's subclasses was decided against:
- NetworkButton (a trigger condition based on a boolean NT entry/topic) is a use case that is not necessarily intuitive for teams to implement themselves, so it is an abstraction that should be provided in the library. A parallel class for the BooleanEvent level, NetworkBooleanEvent, was also added as part of NT4. NT listeners were considered as a alternative solution, but they require attention to thread safety, and aren't interoperable with the EventLoop API.
- JoystickButton/POVButton provide abstractions around HID buttons. The new Trigger-returning factories on the HID classes are an equal (if not more concise) alternative, but there is no reason not to keep them for those who find their use preferable.
At a later date in the deprecation cycle (perhaps for 2024), when Button is removed, these subclasses should be changed to inherit directly from Trigger.
Trigger's bindings are changed to use True/False terminology, as it should be unambiguous. Each binding type has both True and False variants; for brevity, only the True variants are listed here:
- onTrue (replaces whenActive): schedule on rising edge.
- whileTrue (replaces whileActiveOnce): schedule on rising edge, cancel on falling edge.
- toggleOnTrue (replaces toggleWhenActive): on rising edge, schedule if unscheduled and cancel if scheduled.
Two binding types are completely deprecated:
- cancelWhenActive: this is a fairly niche use case which is better described as having the trigger's rising edge (Trigger.rising()) as an end condition for the command (using Command.until()).
- whileActiveContinuously: however common, this relied on the no-op behavior of scheduling an already-scheduled command. The more correct way to repeat the command if it ends before the falling edge is using Command.repeatedly/RepeatCommand or a RunCommand -- the only difference is if the command is interrupted, but that is more likely to result in two commands perpetually canceling each other than achieve the desired behavior. Manually implementing a blindly-scheduling binding like whileActiveContinuously is still possible, though might not be intuitive.
Notes
It was considered to share BooleanEvent's digital signal terminology; however, once it was decided that Trigger should not inherit from BooleanEvent (due to overload incompatibility) the common terminology was not worth the unintuitiveness stemming from users' unfamiliarity with the signal processing terms.
All trigonometric functions and vector classes assume North-West-Up axes
convention, so using North-East-Down convention with them is really
error-prone. We've broken something every time we touched the drive
classes.
We originally used North-East-Down to match the joystick convention, but
the volume of long-lived bugs has made this not worth it in retrospect.
The rest of WPILib also uses North-West-Up, so this makes things
consistent.
KilloughDrive was removed since no one uses it.
- In both C++ and Java, add listener functions to Instance class (same as NT3 provided)
- Add WaitForListenerQueue functions (same as NT3 provided)
- Move Java non-poller implementation to Instance (previously only handled single instance)
- Change C++ listeners to take non-const references for subscribers etc to help avoid footguns from use of temporary objects (also add doc comment)
- Fix Preferences making .type persistent
This avoids the need for explicit value() calls (as compared to using
DoubleTopic). The unit name is published as the "unit" property.
Implementation note: the test needs to be in wpilibc because ntcore does
not depend on wpimath.
