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A little more tidying. Better notes around how the absolute maximum threshold was arrived at.

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This commit is contained in:
Aubrey Hesselgren
2025-07-22 11:01:57 -07:00
committed by Sam Lantinga
parent 8863e5ee67
commit 34616d1b00
3 changed files with 24 additions and 26 deletions
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18
test/testcontroller.c
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@@ -211,7 +211,7 @@ void ResetGyroOrientation(IMUState *imustate)
}
/* More time = more accurate drift correction*/
#define SDL_GAMEPAD_IMU_NOISE_SETTLING_PERIOD_NS (1 * SDL_NS_PER_SECOND)
#define SDL_GAMEPAD_IMU_NOISE_SETTLING_PERIOD_NS ( SDL_NS_PER_SECOND / 2)
#define SDL_GAMEPAD_IMU_NOISE_EVALUATION_PERIOD_NS (4 * SDL_NS_PER_SECOND)
#define SDL_GAMEPAD_IMU_NOISE_PROFILING_PHASE_DURATION_NS (SDL_GAMEPAD_IMU_NOISE_SETTLING_PERIOD_NS + SDL_GAMEPAD_IMU_NOISE_EVALUATION_PERIOD_NS)
#define SDL_GAMEPAD_IMU_CALIBRATION_PHASE_DURATION_NS (5 * SDL_NS_PER_SECOND)
@@ -222,12 +222,11 @@ void ResetGyroOrientation(IMUState *imustate)
void CalibrationPhase_NoiseProfiling(IMUState *imustate)
{
/* If we have really large movement (i.e. greater than a fraction of G), then we want to start noise evaluation over. The frontend will warn the user to put down the controller. */
const float flAbsoluteMaxAccelerationG = 0.125f;
if (imustate->accelerometer_length_squared > (flAbsoluteMaxAccelerationG * flAbsoluteMaxAccelerationG) ) {
if (imustate->accelerometer_length_squared > ACCELEROMETER_MAX_NOISE_G_SQ) {
BeginNoiseCalibrationPhase(imustate);
return;
}
Uint64 now = SDL_GetTicksNS();
Uint64 delta_ns = now - imustate->calibration_phase_start_time_ticks_ns;
@@ -1433,7 +1432,7 @@ static void HandleGamepadGyroEvent(SDL_Event *event)
/* Two strategies for evaluating polling rate - one based on a fixed packet count, and one using a fixed time window.
* Smaller values in either will give you a more responsive polling rate estimate, but this may fluctuate more.
* Larger values in either will give you a more stable average but they will require more time to evaluate.
* Generally, wired connections tend to give much more stable
* Generally, wired connections tend to give much more stable
*/
/* #define SDL_USE_FIXED_PACKET_COUNT_FOR_ESTIMATION */
#define SDL_GAMEPAD_IMU_MIN_POLLING_RATE_ESTIMATION_COUNT 2048
@@ -1479,7 +1478,7 @@ static void UpdateGamepadOrientation( Uint64 delta_time_ns )
static void HandleGamepadSensorEvent( SDL_Event* event )
{
if (!controller)
return;
return;
if (controller->id != event->gsensor.which)
return;
@@ -1504,7 +1503,7 @@ static void HandleGamepadSensorEvent( SDL_Event* event )
/* Show how far we are through the current phase. When off, just default to zero progress */
Uint64 now = SDL_GetTicksNS();
float duration = 0.0f;
Uint64 duration = 0;
if (controller->imu_state->calibration_phase == GYRO_CALIBRATION_PHASE_NOISE_PROFILING) {
duration = SDL_GAMEPAD_IMU_NOISE_PROFILING_PHASE_DURATION_NS;
} else if (controller->imu_state->calibration_phase == GYRO_CALIBRATION_PHASE_DRIFT_PROFILING) {
@@ -1512,7 +1511,7 @@ static void HandleGamepadSensorEvent( SDL_Event* event )
}
Uint64 delta_ns = now - controller->imu_state->calibration_phase_start_time_ticks_ns;
float drift_calibration_progress_frac = duration > 0.0f ? ((float)delta_ns / (float)duration) : 0.0f;
float drift_calibration_progress_fraction = duration > 0.0f ? ((float)delta_ns / (float)duration) : 0.0f;
int reported_polling_rate_hz = sensorTimeStampDelta_ns > 0 ? (int)(SDL_NS_PER_SECOND / sensorTimeStampDelta_ns) : 0;
@@ -1524,10 +1523,9 @@ static void HandleGamepadSensorEvent( SDL_Event* event )
reported_polling_rate_hz,
controller->imu_state->imu_estimated_sensor_rate,
controller->imu_state->calibration_phase,
drift_calibration_progress_frac,
drift_calibration_progress_fraction,
controller->imu_state->accelerometer_length_squared,
controller->imu_state->accelerometer_tolerance_squared
);
/* Also show the gyro correction next to the gyro speed - this is useful in turntable tests as you can use a turntable to calibrate for drift, and that drift correction is functionally the same as the turn table speed (ignoring drift) */