<addElements:withTexture:> rendered two results

[CoderMaurice]

I made some changes to the demo,
when I paint on the bottom, the same strokes appear on the top.(use addElements:withTexture:)
Marker and Highlighter seem to have a problem with addElements.
Any advice?

[adamwulf]

Between calls to JotView addElements:withTexture:, call the state's method finishCurrentStroke.

I should probably update the JotView method to call this automatically in the finishCurrentStroke: method. I think this'll fix it for you.

[CoderMaurice]

I call the state's method finishCurrentStrok: before every addElements:withTexture:.
But the upper part no longer shows anything.

In fact, I have called finishCurrentStroke: in the didEndStrokeWithCoalescedTouch: delegate to make the front and back strokes not connected.

Here is my modified example: (ฅ′ω`ฅ)

[CoderMaurice]

another problem :
There are some elements that will not be added to the upper part by addElements:withTexture:.
Usually the last few elements of a stroke and especially when I write a little faster.