feat: add corner fill toggle for blobs

plugin/src/Caelestia/Blobs/blobgroup.cpp

@@ -28,6 +28,14 @@ void BlobGroup::setColor(const QColor& c) {
     markDirty();
 }
 
+void BlobGroup::setCornerFill(bool e) {
+    if (m_cornerFill == e)
+        return;
+    m_cornerFill = e;
+    emit cornerFillChanged();
+    markDirty();
+}
+
 void BlobGroup::addShape(BlobShape* shape) {
     if (!shape || m_shapes.contains(shape))
         return;

plugin/src/Caelestia/Blobs/blobgroup.hpp

@@ -13,6 +13,7 @@ class BlobGroup : public QObject {
     QML_ELEMENT
     Q_PROPERTY(qreal smoothing READ smoothing WRITE setSmoothing NOTIFY smoothingChanged)
     Q_PROPERTY(QColor color READ color WRITE setColor NOTIFY colorChanged)
+    Q_PROPERTY(bool cornerFill READ cornerFill WRITE setCornerFill NOTIFY cornerFillChanged)
 
 public:
     explicit BlobGroup(QObject* parent = nullptr);
@@ -26,6 +27,10 @@ public:
 
     void setColor(const QColor& c);
 
+    bool cornerFill() const { return m_cornerFill; }
+
+    void setCornerFill(bool e);
+
     void addShape(BlobShape* shape);
     void removeShape(BlobShape* shape);
 
@@ -43,10 +48,12 @@ public:
 signals:
     void smoothingChanged();
     void colorChanged();
+    void cornerFillChanged();
 
 private:
     qreal m_smoothing = 32.0;
     QColor m_color{ 0x44, 0x88, 0xff };
+    bool m_cornerFill = true;
     QList<BlobShape*> m_shapes;
     BlobInvertedRect* m_invertedRect = nullptr;
     bool m_physicsUpdated = false;

plugin/src/Caelestia/Blobs/blobrect.cpp

@@ -173,11 +173,24 @@ bool BlobRect::isExcluded(const BlobShape* other) const {
     return false;
 }
 
+bool BlobRect::isCornerExcluded(const BlobShape* other) const {
+    for (const auto& ptr : m_excludeCorners) {
+        if (ptr == other)
+            return true;
+    }
+    return false;
+}
+
 QQmlListProperty<BlobRect> BlobRect::exclude() {
     return QQmlListProperty<BlobRect>(
         this, nullptr, &excludeAppend, &excludeCount, &excludeAt, &excludeClear, &excludeReplace, &excludeRemoveLast);
 }
 
+QQmlListProperty<BlobRect> BlobRect::excludeCorners() {
+    return QQmlListProperty<BlobRect>(this, nullptr, &excludeCornersAppend, &excludeCornersCount, &excludeCornersAt,
+        &excludeCornersClear, &excludeCornersReplace, &excludeCornersRemoveLast);
+}
+
 void BlobRect::excludeAppend(QQmlListProperty<BlobRect>* prop, BlobRect* rect) {
     auto* self = static_cast<BlobRect*>(prop->object);
     self->m_exclude.append(rect);
@@ -224,6 +237,52 @@ void BlobRect::excludeRemoveLast(QQmlListProperty<BlobRect>* prop) {
     emit self->excludeChanged();
 }
 
+void BlobRect::excludeCornersAppend(QQmlListProperty<BlobRect>* prop, BlobRect* rect) {
+    auto* self = static_cast<BlobRect*>(prop->object);
+    self->m_excludeCorners.append(rect);
+    if (self->m_group)
+        self->m_group->markDirty();
+    emit self->excludeCornersChanged();
+}
+
+qsizetype BlobRect::excludeCornersCount(QQmlListProperty<BlobRect>* prop) {
+    auto* self = static_cast<BlobRect*>(prop->object);
+    return self->m_excludeCorners.size();
+}
+
+BlobRect* BlobRect::excludeCornersAt(QQmlListProperty<BlobRect>* prop, qsizetype index) {
+    auto* self = static_cast<BlobRect*>(prop->object);
+    return self->m_excludeCorners.at(index);
+}
+
+void BlobRect::excludeCornersClear(QQmlListProperty<BlobRect>* prop) {
+    auto* self = static_cast<BlobRect*>(prop->object);
+    if (self->m_excludeCorners.isEmpty())
+        return;
+    self->m_excludeCorners.clear();
+    if (self->m_group)
+        self->m_group->markDirty();
+    emit self->excludeCornersChanged();
+}
+
+void BlobRect::excludeCornersReplace(QQmlListProperty<BlobRect>* prop, qsizetype index, BlobRect* rect) {
+    auto* self = static_cast<BlobRect*>(prop->object);
+    self->m_excludeCorners[index] = rect;
+    if (self->m_group)
+        self->m_group->markDirty();
+    emit self->excludeCornersChanged();
+}
+
+void BlobRect::excludeCornersRemoveLast(QQmlListProperty<BlobRect>* prop) {
+    auto* self = static_cast<BlobRect*>(prop->object);
+    if (self->m_excludeCorners.isEmpty())
+        return;
+    self->m_excludeCorners.removeLast();
+    if (self->m_group)
+        self->m_group->markDirty();
+    emit self->excludeCornersChanged();
+}
+
 void BlobRect::checkAtRest(float speed) {
     constexpr float kEpsilon = 0.002f;
     const bool atRest = std::abs(m_dm00 - 1.0f) < kEpsilon && std::abs(m_dm01) < kEpsilon &&

plugin/src/Caelestia/Blobs/blobrect.hpp

@@ -14,6 +14,7 @@ class BlobRect : public BlobShape {
     Q_PROPERTY(qreal damping READ damping WRITE setDamping NOTIFY dampingChanged)
     Q_PROPERTY(qreal deformScale READ deformScale WRITE setDeformScale NOTIFY deformScaleChanged)
     Q_PROPERTY(QQmlListProperty<BlobRect> exclude READ exclude NOTIFY excludeChanged)
+    Q_PROPERTY(QQmlListProperty<BlobRect> excludeCorners READ excludeCorners NOTIFY excludeCornersChanged)
     Q_PROPERTY(qreal topLeftRadius READ topLeftRadius WRITE setTopLeftRadius NOTIFY topLeftRadiusChanged)
     Q_PROPERTY(qreal topRightRadius READ topRightRadius WRITE setTopRightRadius NOTIFY topRightRadiusChanged)
     Q_PROPERTY(qreal bottomLeftRadius READ bottomLeftRadius WRITE setBottomLeftRadius NOTIFY bottomLeftRadiusChanged)
@@ -52,8 +53,10 @@ public:
     }
 
     QQmlListProperty<BlobRect> exclude();
+    QQmlListProperty<BlobRect> excludeCorners();
 
     bool isExcluded(const BlobShape* other) const override;
+    bool isCornerExcluded(const BlobShape* other) const override;
     void cornerRadii(float out[4]) const override;
 
     qreal topLeftRadius() const { return m_topLeftRadius; }
@@ -77,6 +80,7 @@ signals:
     void dampingChanged();
     void deformScaleChanged();
     void excludeChanged();
+    void excludeCornersChanged();
     void topLeftRadiusChanged();
     void topRightRadiusChanged();
     void bottomLeftRadiusChanged();
@@ -116,6 +120,7 @@ private:
     qreal m_bottomRightRadius = -1;
 
     QList<QPointer<BlobRect>> m_exclude;
+    QList<QPointer<BlobRect>> m_excludeCorners;
 
     static void excludeAppend(QQmlListProperty<BlobRect>* prop, BlobRect* rect);
     static qsizetype excludeCount(QQmlListProperty<BlobRect>* prop);
@@ -123,4 +128,11 @@ private:
     static void excludeClear(QQmlListProperty<BlobRect>* prop);
     static void excludeReplace(QQmlListProperty<BlobRect>* prop, qsizetype index, BlobRect* rect);
     static void excludeRemoveLast(QQmlListProperty<BlobRect>* prop);
+
+    static void excludeCornersAppend(QQmlListProperty<BlobRect>* prop, BlobRect* rect);
+    static qsizetype excludeCornersCount(QQmlListProperty<BlobRect>* prop);
+    static BlobRect* excludeCornersAt(QQmlListProperty<BlobRect>* prop, qsizetype index);
+    static void excludeCornersClear(QQmlListProperty<BlobRect>* prop);
+    static void excludeCornersReplace(QQmlListProperty<BlobRect>* prop, qsizetype index, BlobRect* rect);
+    static void excludeCornersRemoveLast(QQmlListProperty<BlobRect>* prop);
 };

plugin/src/Caelestia/Blobs/blobshape.cpp

@@ -288,10 +288,12 @@ void BlobShape::updatePolish() {
     // Pre-compute effective per-corner radii (moves O(N²) work from GPU to CPU)
     const float smoothFactor = pad;
     constexpr float minR = 2.0f;
+    const bool cornerFill = m_group->cornerFill();
     const auto rectCount = m_cachedRects.size();
     for (qsizetype i = 0; i < rectCount; ++i) {
         auto& ri = m_cachedRects[i];
         const int riExcludeMask = ri.excludeMask;
+        BlobShape* const si = rectShapes[i];
         float fTr = 1.0f, fBr = 1.0f, fBl = 1.0f, fTl = 1.0f;
 
         const float cTrX = ri.cx + ri.hw, cTrY = ri.cy - ri.hh;
@@ -299,11 +301,14 @@ void BlobShape::updatePolish() {
         const float cBlX = ri.cx - ri.hw, cBlY = ri.cy + ri.hh;
         const float cTlX = ri.cx - ri.hw, cTlY = ri.cy - ri.hh;
 
-        for (qsizetype j = 0; j < rectCount; ++j) {
+        for (qsizetype j = 0; cornerFill && j < rectCount; ++j) {
             if (j == i)
                 continue;
             if (riExcludeMask & (1 << j))
                 continue;
+            BlobShape* const sj = rectShapes[j];
+            if (si->isCornerExcluded(sj) || sj->isCornerExcluded(si))
+                continue;
             const auto& rj = m_cachedRects[j];
             // Skip when the corner is inside rj: it's buried, not on a visible junction,
             // so squaring it would only perturb interior SDF gradients.
@@ -321,7 +326,7 @@ void BlobShape::updatePolish() {
                 fTl = std::min(fTl, cpuSmoothstep(0.0f, smoothFactor, sdTl));
         }
 
-        if (m_cachedHasInverted) {
+        if (cornerFill && m_cachedHasInverted) {
             const float icx = m_cachedInvertedInner[0];
             const float icy = m_cachedInvertedInner[1];
             const float ihw = m_cachedInvertedInner[2];

plugin/src/Caelestia/Blobs/blobshape.hpp

@@ -49,6 +49,8 @@ protected:
 
     virtual bool isExcluded(const BlobShape* /*other*/) const { return false; }
 
+    virtual bool isCornerExcluded(const BlobShape* /*other*/) const { return false; }
+
     virtual void cornerRadii(float out[4]) const;
 
     virtual void updatePhysics() {}