Bravo, lovely use of a parametric curve. Inspirational creativity.
Question, do you plan to finish the closing of the curtain? Some continued vector of the movement of the touch?
It would probably be too cute, but could you draw a 'holding hand' instead of a circle? See the lower hand in the attached pic.
If you like math you could create your own with a series of Bezier curves. Or a path of a rough trace.
The curtain closes if you travel more than half the horizontal screen otherwise it goes back. I will not put my hand that would not be visible because it would be covered by my finger while scrolling
The project is now complete. In the next bit of time I will post an example
Passage from page to another with curtain effect (B4A, B4J) SD_Curtain Author: Star-Dust Version: 1.01 SD_Curtain Events: ToLeft ToRight Fields: mBase As B4XView Tag As Object Functions: Class_Globals As String DesignerCreateView (Base As Object, Lbl As Label, Props As Map) As String...