circles + archs

JSBN · **Posted:** Thu May 08, 2003 11:57 am

i am getting pissed off, so i thought i'd ask. I need to get a circle to move in an arch. can someone give me some pionters?
problem is that after a short period of time it starts to move too quickly :/

Tony · **Posted:** Thu May 08, 2003 12:04 pm

use trig to find your new location.

SOH CAH TOA

or you could use a circle equation... x^2 / Rx + y^2 / rY = 1

Radius remains the same, X is determined by forloop, solve for y and you got your new position...

Though that would work for 0 to 180 degrees... use trig if you wanna move further.

Homer_simpson · **Posted:** Thu May 08, 2003 12:45 pm

I dunno if this is what yer askin for... =/

code:

View.Set ("offscreenonly")
var y := 0
var a, b, c := 0.0
a := .001
b := 0
c := 50

for x : -320 .. 320
y := round (a * ((x + b) ** 2) + c)
drawfilloval (x + 320, y, 10, 10, 9)
View.Update
delay (10)
cls
end for

JSBN · **Posted:** Thu May 08, 2003 6:22 pm

yes, but i need it to go faster and for 90o (bottom to mid top)
+10 bits for helping a mod

Homer_simpson · **Posted:** Thu May 08, 2003 6:56 pm

i guess this is as fast as it can be...

code:

View.Set ("offscreenonly")
var yy, y := 0
var a, b, c := 0.0
a := .00099
b := 0
c := 0

for x : 0 .. 640
y := round (a * ((x + b) ** 2) + c)

%remove this loop to make it faster
for xx : 0 .. 640
yy := round (a * ((xx + b) ** 2) + c)
drawdot (xx, yy, 12)
end for
%remove this loop to make it faster

drawfilloval (x, y, 10, 10, 9)
View.Update
cls
end for

Homer_simpson · **Posted:** Thu May 08, 2003 6:58 pm

oooooooh sorry=(
nvm the last post try this one u can make it go as fast as u want

code:

var yy, y := 0
var a, b, c := 0.0
a := .00099
b := 0
c := 0

for x : 0 .. 640 by 5 % this is the speed
y := round (a * ((x + b) ** 2) + c)

%remove this loop to make it faster
for xx : 0 .. 640
yy := round (a * ((xx + b) ** 2) + c)
drawdot (xx, yy, 12)
end for
%remove this loop to make it faster

drawfilloval (x, y, 10, 10, 9)
View.Update
cls
end for

Asok · **Posted:** Thu May 08, 2003 8:03 pm

hehe JSBN, homer just figured out a nice chunk of your ISP for you. Be sure to give him credit in your ISP.

JSBN · **Posted:** Fri May 09, 2003 11:17 am

yeah, will do, thx alot man

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