logic, spline: more spline work/fixes

- mapping window clamps are now value<max_clamp> in
  spline
- clamp won't mess up saved spline content
- clean up artifacts on spline widget

12 files changed, 268 insertions, 244 deletions

diff --git a/gui/mapping-window.cpp b/gui/mapping-window.cpp
index 0726186a..629bcd5b 100644
--- a/gui/mapping-window.cpp
+++ b/gui/mapping-window.cpp
@@ -56,14 +56,14 @@ MapWidget::MapWidget(Mappings& m) : m(m), widgets{}
     tie_setting(s.a_y.altp, ui.ty_altp);
     tie_setting(s.a_z.altp, ui.tz_altp);
 
-    tie_setting(s.a_yaw.clamp_x, ui.max_yaw_rotation);
-    tie_setting(s.a_pitch.clamp_x, ui.max_pitch_rotation);
-    tie_setting(s.a_roll.clamp_x, ui.max_roll_rotation);
-    tie_setting(s.a_x.clamp_x, ui.max_x_translation);
-    tie_setting(s.a_y.clamp_x, ui.max_y_translation);
-    tie_setting(s.a_z.clamp_x, ui.max_z_translation);
-
-    tie_setting(s.a_pitch.clamp_y, ui.max_pitch_output);
+    tie_setting(s.a_yaw.clamp_x_, ui.max_yaw_rotation);
+    tie_setting(s.a_pitch.clamp_x_, ui.max_pitch_rotation);
+    tie_setting(s.a_roll.clamp_x_, ui.max_roll_rotation);
+    tie_setting(s.a_x.clamp_x_, ui.max_x_translation);
+    tie_setting(s.a_y.clamp_x_, ui.max_y_translation);
+    tie_setting(s.a_z.clamp_x_, ui.max_z_translation);
+
+    tie_setting(s.a_pitch.clamp_y_, ui.max_pitch_output);
 }
 
 void MapWidget::load()
@@ -123,10 +123,9 @@ void MapWidget::load()
             qfc.force_redraw();
         }
 
-        connect(&axis.opts.clamp_x, base_value::signal_fun<int>(),
+        connect(&axis.opts.clamp_x_, base_value::signal_fun<int>(),
                 &qfc, [i, &conf, &qfc](int value) {
-            conf.set_max_input(value);
-            qfc.reload_spline();
+            //qfc.reload_spline();
             qfc.set_x_step(value + 1e-2 >= 90 ? 10 : 5);
 
             if (i >= 3)
@@ -140,30 +139,10 @@ void MapWidget::load()
 
         // force signal to avoid duplicating the slot's logic
         qfc.setConfig(&conf);
-        axis.opts.clamp_x.valueChanged(axis.opts.clamp_x);
+        axis.opts.clamp_x_.valueChanged(axis.opts.clamp_x_);
 
         widgets[i % 6][altp ? 1 : 0] = &qfc;
     }
-
-    {
-        value<axis_opts::max_clamp>& val = s.a_pitch.clamp_y;
-
-        Map& axis = m(Pitch);
-
-        connect(&val, base_value::signal_fun<int>(), this, [&](int x) {
-            x = std::abs(x);
-
-            spline* splines[] { &axis.spline_main, &axis.spline_alt };
-
-            for (spline* spl : splines)
-                spl->set_max_output(x);
-
-            ui.ryconfig->setConfig(&axis.spline_main);
-            ui.ryconfig_alt->setConfig(&axis.spline_alt);
-        });
-
-        axis.opts.clamp_y.valueChanged(axis.opts.clamp_y);
-    }
 }
 
 void MapWidget::closeEvent(QCloseEvent*)
diff --git a/logic/main-settings.cpp b/logic/main-settings.cpp
index b1b9a132..e2d1b41f 100644
--- a/logic/main-settings.cpp
+++ b/logic/main-settings.cpp
@@ -3,12 +3,12 @@
 main_settings::main_settings() :
     b(make_bundle("opentrack-ui")),
     b_map(make_bundle("opentrack-mappings")),
-    a_x(b, b_map, "x", TX),
-    a_y(b, b_map, "y", TY),
-    a_z(b, b_map, "z", TZ),
-    a_yaw(b, b_map, "yaw", Yaw),
-    a_pitch(b, b_map, "pitch", Pitch),
-    a_roll(b, b_map, "roll", Roll),
+    a_x("x", TX),
+    a_y("y", TY),
+    a_z("z", TZ),
+    a_yaw("yaw", Yaw),
+    a_pitch("pitch", Pitch),
+    a_roll("roll", Roll),
     all_axis_opts { &a_x, &a_y, &a_z, &a_yaw, &a_pitch, &a_roll },
     tcomp_p(b, "compensate-translation", false),
     tcomp_disable_tx(b, "compensate-translation-disable-x-axis", false),
@@ -59,30 +59,3 @@ key_opts::key_opts(bundle b, const QString& name) :
     guid(b, QString("guid-%1").arg(name), ""),
     button(b, QString("button-%1").arg(name), -1)
 {}
-
-using max_clamp = axis_opts::max_clamp;
-
-static max_clamp get_max_x(Axis k)
-{
-    if (k == Pitch)
-        return max_clamp::r90;
-    if (k >= Yaw)
-        return max_clamp::r180;
-    return max_clamp::t30;
-}
-
-axis_opts::axis_opts(bundle b_settings_window, bundle b_mapping_window, QString pfx, Axis idx) :
-    b_settings_window(b_settings_window),
-    b_mapping_window(b_mapping_window),
-    zero(b_settings_window, n(pfx, "zero-pos"), 0),
-    src(b_settings_window, n(pfx, "source-index"), idx),
-    invert(b_settings_window, n(pfx, "invert-sign"), false),
-    altp(b_mapping_window, n(pfx, "alt-axis-sign"), false),
-    clamp_x(b_mapping_window, n(pfx, "max-value"), get_max_x(idx)),
-    clamp_y(b_mapping_window, n(pfx, "max-output-value"), idx >= Yaw ? o_r90 : o_t75)
-{}
-
-QString axis_opts::n(QString pfx, QString name)
-{
-    return QString("%1-%2").arg(pfx, name);
-}
diff --git a/logic/main-settings.hpp b/logic/main-settings.hpp
index 4b29157f..29f401ab 100644
--- a/logic/main-settings.hpp
+++ b/logic/main-settings.hpp
@@ -10,53 +10,12 @@
 
 #include <QString>
 #include "options/options.hpp"
-#include "api/plugin-api.hpp"
-
 using namespace options;
+#include "api/plugin-api.hpp"
+#include "spline/axis-opts.hpp"
 
 #include "export.hpp"
 
-namespace axis_clamp_opts
-{
-
-} // ns axis-clamp-opts
-
-struct OTR_LOGIC_EXPORT axis_opts final
-{
-    enum max_clamp
-    {
-        r180 = 180,
-        r90 = 90,
-        r60 = 60,
-        r45 = 45,
-        r30 = 30,
-        r25 = 25,
-        r20 = 20,
-        r15 = 15,
-        r10 = 10,
-
-        t100 = 100,
-        t30 = 30,
-        t20 = 20,
-        t15 = 15,
-        t10 = 10,
-
-        o_r180 = -180,
-        o_r90 = -90,
-        o_t75 = -75,
-    };
-
-    // note, these two bundles can be the same value with no issues
-    bundle b_settings_window, b_mapping_window;
-    value<double> zero;
-    value<int> src;
-    value<bool> invert, altp;
-    value<max_clamp> clamp_x, clamp_y;
-    axis_opts(bundle b_settings_window, bundle b_mapping_window, QString pfx, Axis idx);
-private:
-    static inline QString n(QString pfx, QString name);
-};
-
 struct OTR_LOGIC_EXPORT key_opts
 {
     value<QString> keycode, guid;
diff --git a/logic/mappings.cpp b/logic/mappings.cpp
index 9e81bb01..8144f9b4 100644
--- a/logic/mappings.cpp
+++ b/logic/mappings.cpp
@@ -2,18 +2,13 @@
 
 #include <utility>
 
-Map::Map(QString primary, QString secondary, int max_x, int max_y, axis_opts& opts) :
+Map::Map(const QString& spline_name, const QString& alt_spline_name, axis_opts& opts) :
     opts(opts),
-    name1(primary),
-    name2(secondary),
-    spline_main(max_x, max_y, primary),
-    spline_alt(max_x, max_y, secondary)
+    name(spline_name),
+    alt_name(alt_spline_name),
+    spline_main(spline_name, opts.prefix(), opts.axis()),
+    spline_alt(alt_spline_name, opts.prefix(), opts.axis())
 {
-    spline_main.set_max_input(max_x);
-    spline_alt.set_max_input(max_x);
-
-    spline_main.set_max_output(max_y);
-    spline_alt.set_max_output(max_y);
 }
 
 void Map::save()
@@ -30,11 +25,11 @@ void Map::load()
 
 Mappings::Mappings(std::vector<axis_opts*> opts) :
     axes {
-        Map("spline-X", "alt-spline-X", 100, 75, *opts[TX]),
-        Map("spline-Y", "alt-spline-Y", 100, 75, *opts[TY]),
-        Map("spline-Z", "alt-spline-Z", 100, 75, *opts[TZ]),
-        Map("spline-yaw", "alt-spline-yaw", 180, 180, *opts[Yaw]),
-        Map("spline-pitch", "alt-spline-pitch", 180, std::abs((int)opts[Pitch]->clamp_y), *opts[Pitch]),
-        Map("spline-roll", "alt-spline-roll", 180, 180, *opts[Roll])
+        Map("spline-X", "alt-spline-X", *opts[TX]),
+        Map("spline-Y", "alt-spline-Y", *opts[TY]),
+        Map("spline-Z", "alt-spline-Z", *opts[TZ]),
+        Map("spline-yaw", "alt-spline-yaw", *opts[Yaw]),
+        Map("spline-pitch", "alt-spline-pitch", *opts[Pitch]),
+        Map("spline-roll", "alt-spline-roll", *opts[Roll])
     }
 {}
diff --git a/logic/mappings.hpp b/logic/mappings.hpp
index b3587749..4b71e9c5 100644
--- a/logic/mappings.hpp
+++ b/logic/mappings.hpp
@@ -15,13 +15,13 @@ using namespace options;
 
 struct OTR_LOGIC_EXPORT Map final
 {
-    Map(QString primary, QString secondary, int max_x, int max_y, axis_opts& opts);
+    Map(const QString& spline_name, const QString& alt_spline_name, axis_opts& opts);
 
     void save();
     void load();
 
     axis_opts& opts;
-    QString name1, name2;
+    QString name, alt_name;
     spline spline_main, spline_alt;
 };
 
diff --git a/options/base-value.hpp b/options/base-value.hpp
index dfb22670..7bf83619 100644
--- a/options/base-value.hpp
+++ b/options/base-value.hpp
@@ -29,6 +29,7 @@ class OTR_OPTIONS_EXPORT base_value : public QObject
     template<typename t>
     using signal_sig = void(base_value::*)(cv_qualified<t>) const;
 public:
+    bundle get_bundle() { return b; }
     QString name() const { return self_name; }
     base_value(bundle b, const QString& name, comparator cmp, std::type_index type_idx);
     ~base_value() override;
diff --git a/spline/CMakeLists.txt b/spline/CMakeLists.txt
index d252004b..7d427601 100644
--- a/spline/CMakeLists.txt
+++ b/spline/CMakeLists.txt
@@ -1,2 +1,2 @@
-otr_module(spline NO-COMPAT BIN)
-target_link_libraries(opentrack-spline opentrack-options opentrack-compat)
+otr_module(spline BIN)
+target_link_libraries(opentrack-spline)
diff --git a/spline/axis-opts.cpp b/spline/axis-opts.cpp
new file mode 100644
index 00000000..52fe20f5
--- /dev/null
+++ b/spline/axis-opts.cpp
@@ -0,0 +1,47 @@
+#include "axis-opts.hpp"
+
+using max_clamp = axis_opts::max_clamp;
+
+static max_clamp get_max_x(Axis k)
+{
+    if (k == Axis(-1))
+        return max_clamp::x1000;
+    if (k == Pitch)
+        return max_clamp::r90;
+    if (k >= Yaw)
+        return max_clamp::r180;
+    return max_clamp::t30;
+}
+
+static max_clamp get_max_y(Axis k)
+{
+    if (k == Axis(-1))
+        return max_clamp::x1000;
+    if (k == Axis::Pitch)
+        return max_clamp::o_r90;
+    if (k >= Axis::Yaw)
+        return max_clamp::o_r180;
+    return max_clamp::o_t75;
+}
+
+axis_opts::axis_opts(QString pfx, Axis idx) :
+    b_settings_window(make_bundle("opentrack-ui")),
+    b_mapping_window(make_bundle("opentrack-mappings")),
+    zero(b_settings_window, n(pfx, "zero-pos"), 0),
+    src(b_settings_window, n(pfx, "source-index"), idx),
+    invert(b_settings_window, n(pfx, "invert-sign"), false),
+    altp(b_mapping_window, n(pfx, "alt-axis-sign"), false),
+    clamp_x_(b_mapping_window, n(pfx, "max-value"), get_max_x(idx)),
+    clamp_y_(b_mapping_window, n(pfx, "max-output-value"), get_max_y(idx)),
+    prefix_(pfx),
+    axis_(idx)
+{}
+
+QString const& axis_opts::prefix() const { return prefix_; }
+
+Axis axis_opts::axis() const { return axis_; }
+
+QString axis_opts::n(QString pfx, QString name)
+{
+    return QString("%1-%2").arg(pfx, name);
+}
diff --git a/spline/axis-opts.hpp b/spline/axis-opts.hpp
new file mode 100644
index 00000000..ad94236c
--- /dev/null
+++ b/spline/axis-opts.hpp
@@ -0,0 +1,53 @@
+#pragma once
+
+#include "options/options.hpp"
+using namespace options;
+#include "api/plugin-api.hpp"
+
+#include "export.hpp"
+
+struct OTR_SPLINE_EXPORT axis_opts final
+{
+    enum max_clamp
+    {
+        r180 = 180,
+        r90 = 90,
+        r60 = 60,
+        r45 = 45,
+        r30 = 30,
+        r25 = 25,
+        r20 = 20,
+        r15 = 15,
+        r10 = 10,
+
+        t100 = 100,
+        t30 = 30,
+        t20 = 20,
+        t15 = 15,
+        t10 = 10,
+
+        o_r180 = -180,
+        o_r90 = -90,
+        o_t75 = -75,
+
+        x1000 = 1000,
+    };
+
+    // note, these two bundles can be the same value with no issues
+    bundle b_settings_window, b_mapping_window;
+    value<double> zero;
+    value<int> src;
+    value<bool> invert, altp;
+    value<max_clamp> clamp_x_, clamp_y_;
+    double max_clamp_x() const { return std::fabs(clamp_x_.to<double>()); }
+    double max_clamp_y() const { return std::fabs(clamp_y_.to<double>()); }
+    axis_opts(QString pfx, Axis idx);
+
+    QString const& prefix() const;
+    Axis axis() const;
+private:
+    static inline QString n(QString pfx, QString name);
+
+    QString prefix_;
+    Axis axis_;
+};
diff --git a/spline/spline-widget.cpp b/spline/spline-widget.cpp
index 2aa5e6ac..aac4ef9c 100644
--- a/spline/spline-widget.cpp
+++ b/spline/spline-widget.cpp
@@ -60,12 +60,15 @@ void spline_widget::setConfig(spline* spl)
     if (spl)
     {
         update_range();
-        _config->ensure_valid(_config->get_points());
+        {
+            QList<QPointF> pts = _config->get_points();
+            _config->ensure_valid(pts);
+        }
 
         std::shared_ptr<spline::settings> s = spl->get_settings();
         connection = connect(s.get(), &spline::settings::recomputed,
                              this, [this]() { reload_spline(); },
-        Qt::QueuedConnection);
+                             Qt::QueuedConnection);
     }
 }
 
@@ -104,10 +107,12 @@ void spline_widget::drawBackground()
 
     painter.fillRect(rect(), palette().background().color());
 
-    QColor bg_color(112, 154, 209);
-    if (!isEnabled() && !_preview_only)
-        bg_color = QColor(176,176,180);
-    painter.fillRect(pixel_bounds, bg_color);
+    {
+        QColor bg_color(112, 154, 209);
+        if (!isEnabled() && !_preview_only)
+            bg_color = QColor(176,176,180);
+        painter.fillRect(pixel_bounds, bg_color);
+    }
 
     QFont font;
     font.setPointSize(8);
@@ -300,6 +305,16 @@ void spline_widget::paintEvent(QPaintEvent *e)
     QPointF last;
     if (_config->get_last_value(last) && isEnabled())
         drawPoint(p, point_to_pixel(last), QColor(255, 0, 0, 120));
+
+    const QColor bg = palette().background().color();
+
+    const QRect r1(pixel_bounds.left(), 0, width() - pixel_bounds.left(), pixel_bounds.top()),
+                r2(pixel_bounds.right(), 0, width() - pixel_bounds.right(), height());
+
+    // prevent topward artifacts the lazy way
+    p.fillRect(r1, bg);
+    // same for rightward artifacts
+    p.fillRect(r2, bg);
 }
 
 void spline_widget::drawPoint(QPainter& painter, const QPointF& pos, const QColor& colBG, const QColor& border)
@@ -508,9 +523,13 @@ void spline_widget::mouseReleaseEvent(QMouseEvent *e)
 void spline_widget::reload_spline()
 {
     if (_config)
-        _config->ensure_valid(_config->get_points());
+    {
+        QList<QPointF> pts = _config->get_points();
+        _config->ensure_valid(pts);
+    }
     // don't recompute here as the value's about to be recomputed in the callee
     update_range();
+    update();
 }
 
 int spline_widget::get_closeness_limit()
diff --git a/spline/spline.cpp b/spline/spline.cpp
index f28cc98d..ef1e9c58 100644
--- a/spline/spline.cpp
+++ b/spline/spline.cpp
@@ -13,6 +13,7 @@
 #include <cmath>
 #include <memory>
 #include <cinttypes>
+#include <utility>
 
 #include <QObject>
 #include <QMutexLocker>
@@ -25,16 +26,16 @@
 
 constexpr int spline::value_count;
 
-spline::spline(qreal maxx, qreal maxy, const QString& name) :
+spline::spline(const QString& name, const QString& axis_name, Axis axis) :
     s(nullptr),
     data(value_count, -16),
     _mutex(QMutex::Recursive),
-    max_x(maxx),
-    max_y(maxy),
+    ctx(std::make_shared<QObject>()),
+    axis(axis),
     activep(false),
     validp(false)
 {
-    set_bundle(options::make_bundle(name));
+    set_bundle(options::make_bundle(name), axis_name, axis);
 }
 
 spline::~spline()
@@ -44,11 +45,15 @@ spline::~spline()
     if (connection)
     {
         QObject::disconnect(connection);
+        QObject::disconnect(conn_maxx);
+        QObject::disconnect(conn_maxy);
         connection = QMetaObject::Connection();
+        conn_maxx = QMetaObject::Connection();
+        conn_maxy = QMetaObject::Connection();
     }
 }
 
-spline::spline() : spline(0, 0, "") {}
+spline::spline() : spline("", "", Axis(-1)) {}
 
 void spline::set_tracking_active(bool value)
 {
@@ -58,6 +63,7 @@ void spline::set_tracking_active(bool value)
 
 bundle spline::get_bundle()
 {
+    QMutexLocker l(&_mutex); // avoid logic errors due to changes in value<t> data
     return s->b;
 }
 
@@ -68,32 +74,6 @@ void spline::clear()
     validp = false;
 }
 
-void spline::set_max_input(qreal max_input)
-{
-    QMutexLocker l(&_mutex);
-    max_x = max_input;
-    validp = false;
-}
-
-void spline::set_max_output(qreal max_output)
-{
-    QMutexLocker l(&_mutex);
-    max_y = max_output;
-    validp = false;
-}
-
-qreal spline::max_input() const
-{
-    QMutexLocker l(&_mutex);
-    return max_x;
-}
-
-qreal spline::max_output() const
-{
-    QMutexLocker l(&_mutex);
-    return max_y;
-}
-
 float spline::get_value(double x)
 {
     QMutexLocker foo(&_mutex);
@@ -113,9 +93,6 @@ float spline::get_value_no_save_internal(double x)
 {
     QMutexLocker foo(&_mutex);
 
-    if (max_x > 0)
-        x = std::fmin(max_x, x);
-
     float  q  = float(x * bucket_size_coefficient(s->points));
     int    xi = (int)q;
     float  yi = get_value_internal(xi);
@@ -149,23 +126,20 @@ float spline::get_value_internal(int x)
     const float sign = signum(x);
     x = std::abs(x);
     const float ret_ = data[std::min(unsigned(x), unsigned(value_count)-1u)];
-    float ret = sign * std::fmax(0, ret_);
-    if (max_y > 0)
-        ret = fmin(max_y, ret);
-    return ret;
+    return sign * clamp(ret_, 0, 1000);
 }
 
 void spline::add_lone_point()
 {
     points_t points;
-    points.push_back(QPointF(max_x, max_y));
+    points.push_back(QPointF(s->opts.clamp_x_, s->opts.clamp_y_));
 
     s->points = points;
 }
 
-QPointF spline::ensure_in_bounds(const QList<QPointF>& points, double max_x, int i)
+QPointF spline::ensure_in_bounds(const QList<QPointF>& points, int i)
 {
-    const int sz = element_count(points, max_x);
+    const int sz = points.size();
 
     if (i < 0 || sz == 0)
         return QPointF(0, 0);
@@ -176,20 +150,16 @@ QPointF spline::ensure_in_bounds(const QList<QPointF>& points, double max_x, int
     return points[sz - 1];
 }
 
-int spline::element_count(const QList<QPointF>& points, double max_x)
+int spline::element_count(const QList<QPointF>& points, double max_input)
 {
-    if (!(max_x > 0))
-        return points.size();
-    else
+    const unsigned sz = points.size();
+    for (unsigned k = 0; k < sz; k++)
     {
-        const unsigned sz = points.size();
-        for (unsigned i = 0; i < sz; i++)
-        {
-            if (!(points[i].x() <= max_x))
-                return i;
-        }
-        return points.size();
+        const QPointF& pt = points[k];
+        if (max_input > 1e-4 && pt.x() - 1e-2 > max_input)
+            return k;
     }
+    return sz;
 }
 
 bool spline::sort_fn(const QPointF& one, const QPointF& two)
@@ -200,13 +170,13 @@ bool spline::sort_fn(const QPointF& one, const QPointF& two)
 void spline::update_interp_data()
 {
     points_t points = s->points;
-
     ensure_valid(points);
+    const int sz = points.size();
 
-    int sz = element_count(points, max_x);
+    const double maxx = max_input();
 
     if (sz == 0)
-        points.prepend(QPointF(max_x, max_y));
+        points.prepend(QPointF(maxx, max_output()));
 
     std::stable_sort(points.begin(), points.begin() + sz, sort_fn);
 
@@ -218,7 +188,7 @@ void spline::update_interp_data()
 
     if (sz < 2)
     {
-        if (points[0].x() - 1e-2 <= max_x)
+        if (points[0].x() - 1e-2 < maxx)
         {
             const double x = points[0].x();
             const double y = points[0].y();
@@ -232,15 +202,15 @@ void spline::update_interp_data()
     }
     else
     {
-        if (points[0].x() > 1e-2 && points[0].x() <= max_x)
+        if (points[0].x() > 1e-2 && points[0].x() <= maxx)
             points.push_front(QPointF(0, 0));
 
         for (int i = 0; i < sz; i++)
         {
-            const QPointF p0 = ensure_in_bounds(points, max_x, i - 1);
-            const QPointF p1 = ensure_in_bounds(points, max_x, i + 0);
-            const QPointF p2 = ensure_in_bounds(points, max_x, i + 1);
-            const QPointF p3 = ensure_in_bounds(points, max_x, i + 2);
+            const QPointF p0 = ensure_in_bounds(points, i - 1);
+            const QPointF p1 = ensure_in_bounds(points, i + 0);
+            const QPointF p2 = ensure_in_bounds(points, i + 1);
+            const QPointF p3 = ensure_in_bounds(points, i + 2);
             const double p0_x = p0.x(), p1_x = p1.x(), p2_x = p2.x(), p3_x = p3.x();
             const double p0_y = p0.y(), p1_y = p1.y(), p2_y = p2.y(), p3_y = p3.y();
 
@@ -293,7 +263,7 @@ void spline::remove_point(int i)
     QMutexLocker foo(&_mutex);
 
     points_t points = s->points;
-    const int sz = element_count(points, max_x);
+    const int sz = element_count(points, max_input());
 
     if (i >= 0 && i < sz)
     {
@@ -325,7 +295,7 @@ void spline::move_point(int idx, QPointF pt)
 
     points_t points = s->points;
 
-    const int sz = element_count(points, max_x);
+    const int sz = element_count(points, max_input());
 
     if (idx >= 0 && idx < sz)
     {
@@ -346,7 +316,7 @@ QList<QPointF> spline::get_points() const
 int spline::get_point_count() const
 {
     QMutexLocker foo(&_mutex);
-    return element_count(s->points, max_x);
+    return element_count(s->points, s->opts.clamp_x_);
 }
 
 void spline::reload()
@@ -361,7 +331,18 @@ void spline::save()
     s->b->save();
 }
 
-void spline::set_bundle(bundle b)
+void spline::invalidate_settings()
+{
+    // we're holding the mutex to allow signal disconnection in spline dtor
+    // before this slot gets called for the next time
+
+    QMutexLocker l(&_mutex);
+    validp = false;
+
+    emit s->recomputed();
+}
+
+void spline::set_bundle(bundle b, const QString& axis_name, Axis axis)
 {
     QMutexLocker l(&_mutex);
 
@@ -369,34 +350,44 @@ void spline::set_bundle(bundle b)
     // the sentinel settings/bundle objects don't need any further branching once created
     if (!s || s->b != b)
     {
-        s = std::make_shared<settings>(b);
+        s = std::make_shared<settings>(b, axis_name, axis);
 
         if (connection)
+        {
             QObject::disconnect(connection);
+            QObject::disconnect(conn_maxx);
+            QObject::disconnect(conn_maxy);
+        }
 
         if (b)
         {
             connection = QObject::connect(b.get(), &bundle_::changed,
-            s.get(), [&]()
-            {
-                    // we're holding the mutex to allow signal disconnection in spline dtor
-                    // before this slot gets called for the next time
-
-                    // spline isn't a QObject and the connection context is incorrect
-
-                    QMutexLocker l(&_mutex);
-                    validp = false;
+                                          s.get(), [&]() { invalidate_settings(); });
 
-                    emit s->recomputed();
-                },
-            Qt::QueuedConnection);
+            // this isn't strictly necessary for the spline but helps the widget
+            conn_maxx = QObject::connect(&s->opts.clamp_x_, base_value::signal_fun<int>(),
+                                         ctx.get(), [&](double) { invalidate_settings(); });
+            conn_maxy = QObject::connect(&s->opts.clamp_y_, base_value::signal_fun<int>(),
+                                         ctx.get(), [&](double) { invalidate_settings(); });
         }
 
         validp = false;
     }
 }
 
-void spline::ensure_valid(const QList<QPointF>& the_points)
+double spline::max_input() const
+{
+    QMutexLocker l(&_mutex);
+    return s ? s->opts.clamp_x_.to<double>() : 0;
+}
+
+double spline::max_output() const
+{
+    QMutexLocker l(&_mutex);
+    return s ? std::fabs(s->opts.clamp_y_.to<double>()) : 0;
+}
+
+void spline::ensure_valid(QList<QPointF>& the_points)
 {
     QMutexLocker foo(&_mutex);
 
@@ -411,6 +402,8 @@ void spline::ensure_valid(const QList<QPointF>& the_points)
     QList<QPointF> ret_list;
     ret_list.reserve(sz);
 
+    const double maxx = max_input(), maxy = max_output();
+
     for (int i = 0; i < sz; i++)
     {
         QPointF& pt(list[i]);
@@ -421,29 +414,22 @@ void spline::ensure_valid(const QList<QPointF>& the_points)
                 const QPointF& pt2(list[j]);
                 const QPointF tmp(pt - pt2);
                 const double dist_sq = QPointF::dotProduct(tmp, tmp);
-                const double overlap = max_x / 500.;
+                const double overlap = maxx / 500.;
                 if (dist_sq < overlap * overlap)
                     return true;
             }
             return false;
         );
 
-        const bool over_limit = progn(
-            bool ret = false;
-            if (pt.y() - 1e-2 > max_y)
-            {
-                pt.setY(max_y);
-                ret = true;
-            }
-            return ret;
-        );
-
-        if (!overlap && !over_limit)
+        if (!overlap)
             ret_list.push_back(pt);
     }
 
     if (ret_list != the_points)
+    {
         s->points = ret_list;
+        the_points = std::move(ret_list);
+    }
 
     last_input_value = QPointF(0, 0);
     activep = false;
@@ -466,23 +452,26 @@ double spline::bucket_size_coefficient(const QList<QPointF>& points) const
 {
     static constexpr double eps = 1e-4;
 
-    if (unlikely(max_x < eps))
+    const double maxx = max_input();
+
+    if (maxx < eps)
         return 0;
 
     // needed to fill the buckets up to the last control point.
     // space between that point and max_x doesn't matter.
 
-    const int sz = element_count(points, max_x);
-    const double last_x = sz ? points[sz - 1].x() : max_x;
+    const int sz = element_count(points, maxx);
+    const double last_x = sz ? points[sz - 1].x() : maxx;
 
-    return clamp((value_count-1) / clamp(last_x, eps, max_x), 0., (value_count-1));
+    return clamp((value_count-1) / clamp(last_x, eps, maxx), 0., (value_count-1));
 }
 
 namespace spline_detail {
 
-settings::settings(bundle b):
+settings::settings(bundle b, const QString& axis_name, Axis idx):
     b(b ? b : make_bundle("")),
-    points(b, "points", QList<QPointF>())
+    points(b, "points", {}),
+    opts(axis_name, idx)
 {}
 
 settings::~settings()
diff --git a/spline/spline.hpp b/spline/spline.hpp
index cb2dc654..334e70d0 100644
--- a/spline/spline.hpp
+++ b/spline/spline.hpp
@@ -13,11 +13,14 @@
 #include "compat/util.hpp"
 using namespace options;
 
+#include "axis-opts.hpp"
+
 #include "export.hpp"
 
 #include <vector>
 #include <limits>
 #include <memory>
+#include <functional>
 
 #include <QObject>
 #include <QPointF>
@@ -29,10 +32,12 @@ namespace spline_detail {
 class OTR_SPLINE_EXPORT settings final : public QObject
 {
     Q_OBJECT
+
 public:
     bundle b;
     value<QList<QPointF>> points;
-    settings(bundle b);
+    axis_opts opts;
+    settings(bundle b, const QString& axis_name, Axis idx);
     ~settings() override;
 signals:
     void recomputed() const;
@@ -49,11 +54,11 @@ class OTR_SPLINE_EXPORT spline final
     float get_value_no_save_internal(double x);
     static bool sort_fn(const QPointF& one, const QPointF& two);
 
-    static QPointF ensure_in_bounds(const QList<QPointF>& points, double max_x, int i);
-    static int element_count(const QList<QPointF>& points, double max_x);
+    static QPointF ensure_in_bounds(const QList<QPointF>& points, int i);
+    static int element_count(const QList<QPointF>& points, double max_input);
 
     std::shared_ptr<spline_detail::settings> s;
-    QMetaObject::Connection connection;
+    QMetaObject::Connection connection, conn_maxx, conn_maxy;
 
     std::vector<float> data;
     using interp_data_t = decltype(data);
@@ -62,21 +67,27 @@ class OTR_SPLINE_EXPORT spline final
 
     MyMutex _mutex;
     QPointF last_input_value;
-    qreal max_x, max_y; // XXX TODO move to value<double> -sh 20171020
+    std::shared_ptr<QObject> ctx;
+
+    Axis axis;
+
     bool activep;
     bool validp;
 
 public:
     using settings = spline_detail::settings;
 
+    void invalidate_settings();
+
     void reload();
     void save();
-    void set_bundle(bundle b);
+    void set_bundle(bundle b, const QString& axis_name, Axis axis);
+
+    double max_input() const;
+    double max_output() const;
 
-    qreal max_input() const;
-    qreal max_output() const;
     spline();
-    spline(qreal maxx, qreal maxy, const QString& name);
+    spline(const QString& name, const QString& axis_name, Axis axis);
     ~spline();
 
     spline& operator=(const spline&) = default;
@@ -92,12 +103,10 @@ public:
     void add_point(double x, double y);
     void move_point(int idx, QPointF pt);
     QList<QPointF> get_points() const;
-    void set_max_input(qreal MaxInput);
-    void set_max_output(qreal MaxOutput);
 
     void set_tracking_active(bool value);
     bundle get_bundle();
-    void ensure_valid(const QList<QPointF>& the_points);
+    void ensure_valid(QList<QPointF>& the_points);
 
     std::shared_ptr<settings> get_settings();
     std::shared_ptr<const settings> get_settings() const;