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Merge pull request #9096 from jordan-woyak/calibration-cleanup

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ControllerEmu: Improve and simplify UpdateCalibrationData.
This commit is contained in:
Léo Lam 2020-10-20 02:01:16 +02:00 committed by GitHub
commit 911704611e
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4 changed files with 33 additions and 48 deletions
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5
Source/Core/DolphinQt/Config/Mapping/MappingIndicator.cpp
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@ -856,6 +856,7 @@ void CalibrationWidget::SetupActions()
void CalibrationWidget::StartCalibration()
{
m_prev_point = {};
m_calibration_data.assign(m_input.CALIBRATION_SAMPLE_COUNT, 0.0);
// Cancel calibration.
@ -888,7 +889,9 @@ void CalibrationWidget::Update(Common::DVec2 point)
if (IsCalibrating())
{
m_input.UpdateCalibrationData(m_calibration_data, point - *m_new_center);
const auto new_point = point - *m_new_center;
m_input.UpdateCalibrationData(m_calibration_data, m_prev_point, new_point);
m_prev_point = new_point;
if (IsCalibrationDataSensible(m_calibration_data))
{

1
Source/Core/DolphinQt/Config/Mapping/MappingIndicator.h
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@ -204,4 +204,5 @@ private:
ControllerEmu::ReshapableInput::CalibrationData m_calibration_data;
QTimer* m_informative_timer;
std::optional<Common::DVec2> m_new_center;
Common::DVec2 m_prev_point;
};

72
Source/Core/InputCommon/ControllerEmu/StickGate.cpp
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@ -25,18 +25,24 @@ constexpr auto CALIBRATION_CONFIG_SCALE = 100;
constexpr auto CENTER_CONFIG_NAME = "Center";
constexpr auto CENTER_CONFIG_SCALE = 100;
// Calculate distance to intersection of a ray with a line defined by two points.
double GetRayLineIntersection(Common::DVec2 ray, Common::DVec2 point1, Common::DVec2 point2)
// Calculate distance to intersection of a ray with a line segment defined by two points.
std::optional<double> GetRayLineIntersection(Common::DVec2 ray, Common::DVec2 point1,
Common::DVec2 point2)
{
const auto diff = point2 - point1;
const auto dot = diff.Dot({-ray.y, ray.x});
if (std::abs(dot) < 0.00001)
{
// Handle situation where both points are on top of eachother.
// This could occur if the user configures a single calibration value
// or when updating calibration.
return point1.Length();
// Both points are on top of eachother.
return std::nullopt;
}
const auto segment_position = point1.Dot({ray.y, -ray.x}) / dot;
if (segment_position < -0.00001 || segment_position > 1.00001)
{
// Ray does not pass through segment.
return std::nullopt;
}
return diff.Cross(-point1) / dot;
@ -147,9 +153,13 @@ ControlState ReshapableInput::GetCalibrationDataRadiusAtAngle(const CalibrationD
const double sample1_angle = sample1_index * MathUtil::TAU / data.size();
const double sample2_angle = sample2_index * MathUtil::TAU / data.size();
return GetRayLineIntersection(GetPointFromAngleAndLength(angle, 1.0),
GetPointFromAngleAndLength(sample1_angle, data[sample1_index]),
GetPointFromAngleAndLength(sample2_angle, data[sample2_index]));
const auto intersection =
GetRayLineIntersection(GetPointFromAngleAndLength(angle, 1.0),
GetPointFromAngleAndLength(sample1_angle, data[sample1_index]),
GetPointFromAngleAndLength(sample2_angle, data[sample2_index]));
// Intersection has no value when points are on top of eachother.
return intersection.value_or(data[sample1_index]);
}
ControlState ReshapableInput::GetDefaultInputRadiusAtAngle(double angle) const
@ -173,46 +183,16 @@ void ReshapableInput::SetCalibrationFromGate(const StickGate& gate)
val = gate.GetRadiusAtAngle(MathUtil::TAU * i++ / m_calibration.size());
}
void ReshapableInput::UpdateCalibrationData(CalibrationData& data, Common::DVec2 point)
void ReshapableInput::UpdateCalibrationData(CalibrationData& data, Common::DVec2 point1,
Common::DVec2 point2)
{
const auto angle_scale = MathUtil::TAU / data.size();
const u32 calibration_index =
std::lround((std::atan2(point.y, point.x) + MathUtil::TAU) / angle_scale) % data.size();
const double calibration_angle = calibration_index * angle_scale;
auto& calibration_sample = data[calibration_index];
// Update closest sample from provided x,y.
calibration_sample = std::clamp(point.Length(), calibration_sample,
SquareStickGate(1).GetRadiusAtAngle(calibration_angle));
// Here we update all other samples in our calibration vector to maintain
// a convex polygon containing our new calibration point.
// This is required to properly fill in angles that cannot be gotten.
// (e.g. Keyboard input only has 8 possible angles)
// Note: Loop assumes an even sample count, which should not be a problem.
for (auto sample_offset = u32(data.size() / 2 - 1); sample_offset > 1; --sample_offset)
for (u32 i = 0; i != data.size(); ++i)
{
const auto update_at_offset = [&](u32 offset1, u32 offset2) {
const u32 sample1_index = (calibration_index + offset1) % data.size();
const double sample1_angle = sample1_index * angle_scale;
auto& sample1 = data[sample1_index];
const auto angle = i * MathUtil::TAU / data.size();
const auto intersection =
GetRayLineIntersection(GetPointFromAngleAndLength(angle, 1.0), point1, point2);
const u32 sample2_index = (calibration_index + offset2) % data.size();
const double sample2_angle = sample2_index * angle_scale;
auto& sample2 = data[sample2_index];
const double intersection =
GetRayLineIntersection(GetPointFromAngleAndLength(sample2_angle, 1.0),
GetPointFromAngleAndLength(sample1_angle, sample1),
GetPointFromAngleAndLength(calibration_angle, calibration_sample));
sample2 = std::max(sample2, intersection);
};
update_at_offset(sample_offset, sample_offset - 1);
update_at_offset(u32(data.size() - sample_offset), u32(data.size() - sample_offset + 1));
data[i] = std::max(data[i], intersection.value_or(data[i]));
}
}

3
Source/Core/InputCommon/ControllerEmu/StickGate.h
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@ -92,7 +92,8 @@ public:
void SetCalibrationToDefault();
void SetCalibrationFromGate(const StickGate& gate);
static void UpdateCalibrationData(CalibrationData& data, Common::DVec2 point);
static void UpdateCalibrationData(CalibrationData& data, Common::DVec2 point1,
Common::DVec2 point2);
static ControlState GetCalibrationDataRadiusAtAngle(const CalibrationData& data, double angle);
const CalibrationData& GetCalibrationData() const;