math rotation formula...

Homer_simpson · **Posted:** Sun May 04, 2003 3:49 pm

k... here's the problem I need a formula or procedure that would get OriginX,OriginY,SecondparX,SecondparY,Angle and then caclulate the SecondparX and SecondparY rotated By Angle
please help... ASAP

Homer_simpson · **Posted:** Sun May 04, 2003 3:51 pm

i know
Y = R*Sin(deg)
X = R*Cos(deg)
and
radius^2 = X^2 + Y^2
But i cant get them to do what i want...

I have tried a procedure that would get
OriginX,OriginY,radius,Angle as well but i cant work it Crying or Very sad

HEEEEEELP!!!!!!!!!!!!!!!!!!!!!!!!

Homer_simpson · **Posted:** Sun May 04, 2003 4:36 pm

WHOOHOOO!!!!!!!!!!!!!!
I solved it took me an hour to work the formula... Rolling Eyes

But at last

code:

procedure rotate (OriginX, OriginY : int, var secondpartX, secondpartY : real, Rotaion : int)
var tempx := (((OriginX - secondpartX) * cosd (Rotaion)) + ((OriginY - secondpartY) * sind (Rotaion)))
var tempy := (((OriginY - secondpartY) * cosd (Rotaion)) - ((OriginX - secondpartX) * sind (Rotaion)))
secondpartY := OriginY - tempy
secondpartX := OriginX - tempx
end rotate

Homer_simpson · **Posted:** Sun May 04, 2003 4:46 pm

here's a pretty demo of how it works:

code:

procedure rotate (OriginX, OriginY : int, var secondpartX, secondpartY : real, Rotaion : real)
var tempx := (((OriginX - secondpartX) * cosd (Rotaion)) + ((OriginY - secondpartY) * sind (Rotaion)))
var tempy := (((OriginY - secondpartY) * cosd (Rotaion)) - ((OriginX - secondpartX) * sind (Rotaion)))
secondpartY := OriginY - tempy
secondpartX := OriginX - tempx
end rotate
var col := 1
var i := .0
var secondpartX, secondpartY := 500.0
secondpartY := 200
loop
rotate (320, 200, secondpartX, secondpartY, .01)
i += .01
drawline (320, 200, round (secondpartX), round (secondpartY), col)
if i >= 30 then
col += 1
i := 0
end if
end loop

Asok · **Posted:** Sun May 04, 2003 5:22 pm

how are you using glow in your text?

Homer_simpson · **Posted:** Sun May 04, 2003 5:25 pm

is it not allowed? =/

Asok · **Posted:** Sun May 04, 2003 5:27 pm

well no one has done it before so I'll assume we didn't make a decision on it. PM me with how you did that. (I'll need to exploit test glow system)

Tony · **Posted:** Sun May 04, 2003 5:42 pm

its just a HTML tag... See

Dan · **Posted:** Sun May 04, 2003 10:00 pm

i am sprised no one eltes figered it out yet, lol

oh well as lonjg was you dont over do it Wink

Homer_simpson · **Posted:** Sun May 04, 2003 10:04 pm

heh!
i was trying to work some dhtml on my text to make it really fancy but for some reason javascript doesn't work only straight html... =/

Dan · **Posted:** Sun May 04, 2003 10:25 pm

Homer_simpson wrote:

heh!
i was trying to work some dhtml on my text to make it really fancy but for some reason javascript doesn't work only straight html... =/

that is so no one will wirte somting in javascript that will mess over the fourm or piss peopeop off. also not all html will wrok...

Homer_simpson · **Posted:** Sun May 04, 2003 10:52 pm

what ever you say dan =Ãž
Hail the admins... HAIL.... 8)

	Computer Science Canada Programming C, C++, Java, PHP, Ruby, Turing, VB Username: Password: Register
Wiki Blog Search Turing Chat Room Members