[NFBOH-Cleveland] Fwd: Latest news about the Blindfold Games

[Cheryl Fields]

 Learn more about the blindfold games next week at the Ohio affiliate
convention!

---------- Forwarded message ---------
From: Blindfold Games <martyschultz at kidfriendlysoftware.com>
Date: Tue, Oct 23, 2018 at 10:01 AM
Subject: Latest news about the Blindfold Games
To: <cherylelaine1957 at gmail.com>


Blindfold Games #285: Why do I have to learn trigonometry, dad?Marty
Schultz, 22 Oct 10:23 AM When I was designing Blindfold Racer several years
ago

Blindfold Games #285: Why do I have to learn trigonometry, dad?
<https://sable.madmimi.com/c/12318?id=2014468.25382.1.f6a9bada32e473d3ecefad509339ece1>
Marty Schultz, 22 Oct 10:23 AM

When I was designing Blindfold Racer several years ago, I had to consider
how to lay out the road.  Blindfold Racer started as a STEM after-school
club for 5th and 6th graders.  Together we designed the game and then I
programmed it at home.

I thought about how the students were laying out the road track, and I
needed an easy way to convert that into a virtual track in the game. I also
thought that in a future version of the game, we may want game players to
create their own tracks and then drive on it.

By searching “open source” (free) programming projects that other people
have created and shared, I found a program that lets you draw on the screen
(with your finger), and then tells you the points on the line. Using that
program, I could draw the “center line” of the track, and I would simply
have to write a program to compute the left and right edges of the track
(based on the width of the track). Easy?   No!

It took about two weeks of relearning my trigonometry from high school to
figure out how to do that – for example, how to rotate a square:


You need to know which direction the car is moving to understand which is
the left fence and which is the right fence. For a straight track, it’s
easy. For a track in the shape of a vertical “S” or a horizontal “S”, it
becomes more difficult.

Essentially, I have to determine the bounding square of the track for every
point on the “center line”:


and from that compute the left and right sides of the track.

Now, when my daughter asks me, “*what good is trigonometry – no one really
needs it when they are grown up*“, I know what to say.






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Wishing You All the Best,

Cheryl E. Fields


A man has made at least a start on discovering the meaning of human life
when he plants shade trees under which he knows full well he will never sit.
--D. Elton Trueblood
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