Computer Science Canada

circles + archs
Author:  JSBN [ Thu May 08, 2003 11:57 am ]
Post subject:  circles + archs
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 :/
Author:  Tony [ Thu May 08, 2003 12:04 pm ]
Post subject: 
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.
Author:  Homer_simpson [ Thu May 08, 2003 12:45 pm ]
Post subject: 
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
Author:  JSBN [ Thu May 08, 2003 6:22 pm ]
Post subject: 
yes, but i need it to go faster and for 90o (bottom to mid top)
+10 bits for helping a mod
Author:  Homer_simpson [ Thu May 08, 2003 6:56 pm ]
Post subject: 
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
Author:  Homer_simpson [ Thu May 08, 2003 6:58 pm ]
Post subject: 
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
Author:  Asok [ Thu May 08, 2003 8:03 pm ]
Post subject: 
hehe JSBN, homer just figured out a nice chunk of your ISP for you. Be sure to give him credit in your ISP.
Author:  JSBN [ Fri May 09, 2003 11:17 am ]
Post subject: 
yeah, will do, thx alot man

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