Scratch

wiyaya · 2012-06-11 20:55:19

How do you make sprite make a perfect circle slowly? The one that is suggested when i cliked with my left on "turn" didn't really make a circle...

coolhogs · 2012-06-11 20:59:02

Turn while moving.

jvvg · 2012-06-11 21:15:34

You can set the rotation center of the costume to the center of the circle, and then try this script:

when I receive [draw]
clear
repeat (360)
turn cw (1) degrees
stamp
end

MoreGamesNow · 2012-06-11 21:27:45

when I receive [Draw Circle v]
pen up
clear
go to x:(0) y:(0)
repeat (90)
turn cw (4) degrees
move (1) steps
end

jvvg · 2012-06-11 21:29:34

MoreGamesNow wrote:
...some script....

I think you also need a pen down in there, so:

when I receive [Draw Circle v]
pen up
clear
go to x:(0) y:(0)
pen down
repeat (90)
turn cw (4) degrees
move (1) steps
end
pen up

MoreGamesNow · 2012-06-11 22:00:57

jvvg wrote:
I think you also need a pen down in there, so:

Thanks, can't believe I overlooked that xD

zammer990 · 2012-06-12 10:52:57

when gf clicked
set [angle v] to (0)
forever
go to x:((([cos v] of (angle)) * (radius)) + (origin x)) y:((([sin v] of (angle)) * (radius)) + (origin x))
change [angle v] by (1)
wait (x) secs

Where origin x and y are the circle's center coords, you could do an angle limiter eg.ifangle = 360 set angle to 0

Last edited by zammer990 (2012-06-12 12:22:38)

AtomicBawm3 · 2012-06-12 11:35:25

zammer990 wrote:
when gf clicked
set [angle v] to (0)
forever
go to x:((([sin v] of (angle)) * (radius)) + (origin x)) y:((([cos v] of (angle)) * (radius)) + (origin y))
change [angle v] by (1)
wait (x) secs
Where origin x and y are the circle's center coords, you could do an angle limiter eg.ifangle = 369 set angle to 0

Fixed.

zammer990 · 2012-06-12 12:24:30

AtomicBawm3 wrote:
zammer990 wrote:
when gf clicked
set [angle v] to (0)
forever
go to x:((([sin v] of (angle)) * (radius)) + (origin x)) y:((([cos v] of (angle)) * (radius)) + (origin y))
change [angle v] by (1)
wait (x) secs
Where origin x and y are the circle's center coords, you could do an angle limiter eg.ifangle = 369 set angle to 0
Fixed.

Either way works, sine draws from the top, cosine from the side

amcerbu · 2012-06-12 13:00:10

zammer990 wrote:
...you could do an angle limiter e.g. if angle = 360 set angle to 0

Perhaps you're looking for the Modulo operation (often known as just mod). Include a block like this within the forever loop.

set [angle v] to ((angle) mod (360))

But, if you're using trigonometric functions, it won't matter whether the input is greater than 360, because

sin(25) = sin(25 + 360) = sin(25 + 720) = sin(25 + 360n)

where n is an integer.

Scratch

archived forums

#1 2012-06-11 20:55:19

Circle

#2 2012-06-11 20:59:02

Re: Circle

#3 2012-06-11 21:15:34

Re: Circle

#4 2012-06-11 21:27:45

Re: Circle

#5 2012-06-11 21:29:34

Re: Circle

MoreGamesNow wrote:

#6 2012-06-11 22:00:57

Re: Circle

jvvg wrote:

#7 2012-06-12 10:52:57

Re: Circle

#8 2012-06-12 11:35:25

Re: Circle

zammer990 wrote:

#9 2012-06-12 12:24:30

Re: Circle

AtomicBawm3 wrote:

zammer990 wrote:

#10 2012-06-12 13:00:10

Re: Circle

zammer990 wrote:

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