Something wrong with my geometry

[richmond62]

I have a stack with a 'turtle' and buttons to set the angle (currently only offering 90, 180,270 and 0 degrees) of travel, a field to input the distance of travel and a button "FORWARD" to get the
turtle to travel.

However, something seems wrong with my Pythagoras.

See script inside "FORWARD" button to see how I've gone wrong.

rat.livecode.zip

(2.59 KiB) Downloaded 168 times

[dunbarx]

Hi.

Fun stuff. I only glanced at your code, but I think you should rechoose the browse tool at the end of your handler.

Oh, and it is important to know that the trig functions in LC work only in radians, not degrees. This could be important

If you are more comfortable in degrees, can you write a function to translate, transparently, so that you never have to think about it again?

Craig Newman

[SparkOut]

Radians, not degrees!

Code: Select all

put DD * pi / 180 into tRadians
   put cos(tRadians) into tCos
   put tCos * FW into RITE
   put sin(tRadians) into tSin
   put tSin * FW into DOON

Aha, Craig answered while I was tapping. And yes, make it a functions.

[richmond62]

Ah! Radians! Says he pretending he's happy and wonder-struck by that, but, instead, feeling a "right Wally" for not working that out.

Of course, awkward sods [what, me? surely not?] would ask why, if "set the angle" works in degree, sine and cosine only works with radians?

So, now I've got to pop an algorithm in "there" to convert degrees into radians - that sucks a bit . . .