Plugins/ZShell/Blobs/blobrect.cpp

@@ -14,6 +14,8 @@ BlobRect::~BlobRect() {
 }
 
 void BlobRect::updatePolish() {
+	BlobShape::updatePolish();
+
 	if (m_physicsActive) {
 		// Check if deformation is visually imperceptible
 		float totalDelta = std::abs(m_dm00 - 1.0f) + std::abs(m_dm01) + std::abs(m_dm11 - 1.0f);
@@ -39,8 +41,6 @@ void BlobRect::updatePolish() {
 				Qt::QueuedConnection);
 		}
 	}
-
-	BlobShape::updatePolish();
 }
 
 void BlobRect::updatePhysics() {

Plugins/ZShell/Blobs/blobshape.cpp

@@ -68,9 +68,22 @@ void BlobShape::componentComplete() {
 void BlobShape::geometryChange(const QRectF& newGeometry, const QRectF& oldGeometry) {
 	QQuickItem::geometryChange(newGeometry, oldGeometry);
 	updateCenteredDeformMatrix();
-	if (m_group && newGeometry != oldGeometry) {
+	if (m_group) {
+		// Accumulate sub-pixel drift so slow movements don't desync the shader
+		m_pendingDx += static_cast<float>(newGeometry.x() - oldGeometry.x());
+		m_pendingDy += static_cast<float>(newGeometry.y() - oldGeometry.y());
+		m_pendingDw += static_cast<float>(newGeometry.width() - oldGeometry.width());
+		m_pendingDh += static_cast<float>(newGeometry.height() - oldGeometry.height());
+		
+		if (std::abs(m_pendingDx) > 0.5f || std::abs(m_pendingDy) > 0.5f || 
+		    std::abs(m_pendingDw) > 0.5f || std::abs(m_pendingDh) > 0.5f) {
+			m_pendingDx = 0;
+			m_pendingDy = 0;
+			m_pendingDw = 0;
+			m_pendingDh = 0;
 			m_group->markShapeDirty(this);
 		}
+	}
 }
 
 void BlobShape::updateCenteredDeformMatrix() {

Plugins/ZShell/Blobs/blobshape.hpp

@@ -82,9 +82,13 @@ float m_cachedPaddedW = 0;
 float m_cachedPaddedH = 0;
 QRectF m_localPaddedRect;
 QVector<BlobRectData> m_cachedRects;
-	int m_cachedMyIndex = -2;
+int m_cachedMyIndex = -2;
-	bool m_cachedHasInverted = false;
+float m_pendingDx = 0;
-	float m_cachedInvertedRadius = 0;
+float m_pendingDy = 0;
+float m_pendingDw = 0;
+float m_pendingDh = 0;
+bool m_cachedHasInverted = false;
+float m_cachedInvertedRadius = 0;
 float m_cachedInvertedOuter[4] = {};
 float m_cachedInvertedInner[4] = {};
 };