Stationary Ball option in GUI

[demifang]

Aatish, after working on p5 to make sure it ran OK, I just copy/pasted my new p5 code into this "Edit file" field-- is that how it works? Hope you can see the changes I made. If not, I introduced "isBallMoving" boolean variable and made a Stationary Ball option in the drop-down menu for interactions.

The one thing I couldn't figure out is in line 212-- currently, when you select Stationary Ball, the new stationary ball takes on the position of the Moving Ball before it stopped. I think it'd be better to have the position be reset to the center, but I wasn't sure how to go about doing that.

Alternatively, maybe it'd be nicer to have a checkbox for "moving" when the "Ball" option is selected from the dropdown menu-- in this scenario, I wouldn't mind the stationary ball taking on the old position. However, I wasn't sure how to code the GUI so that the checkbox would only be activated when a certain dropdown option is selected. Let me know what you think!

[aatishb]

Hi Demi, thanks for making the pull request! The changes make sense to me. However, when I test it out I’m getting a very slight visual glitch (in the moving ball, a few particles of the cloth tend to ‘jump around’ just a little.) I’ll try to get to the bottom of this.

[aatishb]

Could you check to see if you see the same glitch as well? It's an effect where a few particles seem to be pushed slightly away from the moving ball. It's weird because as far as I can tell, nothing should be affected for the moving ball.

[demifang]

Right, Aatish I see this bug for the stationary ball as well. Actually I'm
trying the latest web version and I think I see the same jumpiness there--
could it be unrelated to the stationary ball addition?
Another thing I just noticed in my stationary ball addition is that for the
stationary ball, I'm not sure the friction is working-- I turned up the
friction to 1 and the cloth was still sliding off the ball. Did you get the
same thing by any chance?

Demi Fang
Department of Civil & Environmental Engineering
Certificate Program in Musical Performance
Princeton University | Class of 2017
dfang@princeton.edu

On Mon, May 23, 2016 at 9:08 PM, aatishb notifications@github.com wrote:

Could you check to see if you see the same glitch as well? It's an effect
where a few particles seem to be pushed slightly away from the moving ball.
It's weird because as far as I can tell, nothing should be affected for the
moving ball.

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