Discussion Sin/Cos?

[kingkingyyk3]

I just found Warcraft 3's Sin and Cos function are weird.

Correct :

Tested Sin/Cos, both resulted same look.
Literate through 0->1440 for x and 300*scale for y-axis.
Any idea? :nuts:

 

[Weep]

Literate through 0->1440 for x and 300*scale for y-axis.

That's an awfully big number for a function that takes radians.

If that's not it, post your code?

Cool-looking pattern, though...

 

[kingkingyyk3]

Oh... radian..

 

[tooltiperror]

Speaking of Radians, could someone please explain them to me?

 

[kingkingyyk3]

2 * pi rad = 360 degree

Tangent

Sin 3x

Cos 3x

 

[Weep]

Radians are just another unit of measurement for angle.

Degrees break a full rotation up into 360 divisions, whereas 2(pi) radians complete a rotation. This is handy because circular measurements naturally depend on pi. For example, the length along the edge of a circular sector is simply radius*angle (in radians).

 

[SineCosine]

The ratio is..

(180°) : ? Radians

1° : (?/180) Radians

 

[kingkingyyk3]

180 degree = 1 rad
1 degree = ~0.175rad or (pi / 180)

 

[Jesus4Lyf]

the length along the edge of a circular sector is simply radius*angle (in radians).

The reason I think degrees should be banished...

 

[kingkingyyk3]

Perhaps I post the script for you all to test it.

library GraphViewer

    function interface GetY takes real x returns real
    
    globals
        private constant string Model = "Abilities\\Weapons\\RedDragonBreath\\RedDragonMissile.mdl"
        private constant string AxisModel = "Abilities\\Weapons\\GreenDragonMissile\\GreenDragonMissile.mdl"
        private GetY equation
        private timer t = CreateTimer()
        private real xD = 0.
        private real x = 0.
        private real s
    endglobals
    
    private function GenerateGraph takes nothing returns nothing
        if xD > 0. then
            set xD = xD - .07
            set x = x + .07
            call AddSpecialEffect(Model,x * s,equation.evaluate(x) * s)
        else
            call PauseTimer(t)
        endif
    endfunction
    
    function ShowGraph takes GetY y, real times, real scale returns nothing
        set equation = y
        set xD = times * 2
        set s = scale
        set x = -times
        call TimerStart(t,0.0,true,function GenerateGraph)
    endfunction
    
    private struct Initializer extends array
        private static method onInit takes nothing returns nothing
            set xD = -2000.
            loop
            exitwhen xD >= 2000.
                call AddSpecialEffect(AxisModel,xD,0.)
                call AddSpecialEffect(AxisModel,0.,xD)
                set xD = xD + 100.
            endloop
        endmethod
    endstruct
endlibrary

library MapInit initializer Init requires GraphViewer
    private function Equation takes real x returns real
        return 3 - x - (4 * x * x) //Equation of line
    endfunction
    //don't touch any thing below here.
    private function Init takes nothing returns nothing
        call FogEnable(false )
        call FogMaskEnable(false)
        call SetCameraField(CAMERA_FIELD_ZOFFSET,3000.,0.)
        call SetCameraField(CAMERA_FIELD_ANGLE_OF_ATTACK,270.,0.)
        call PanCameraTo(0.,0.)
        call ShowGraph(Equation,6.284,300.)
    endfunction
endlibrary

 

[SineCosine]

HEY!

I put in the symbol for pi in my post, but the forum thingy made it into a question mark, wtf!

Lemme' try again..

???????????????

 

[Crazy_Dead]

Nope.

 

[Monovertex]

HEY!

I put in the symbol for pi in my post, but the forum thingy made it into a question mark, wtf!

Lemme' try again..

???????????????

The font set does not support it. Put it as an image .

 

[SineCosine]

Looks like I got beat to it =/

 

[Weep]

How about
_
|L

 

[SineCosine]

That just looks fugly ._.

 

[Weep]

Well, what're ya gonna do.

The worst part is that it (pi ? ?) displays correctly when hitting "Preview Post" but not in the post itself.

 

[SineCosine]

Haha, this thread has been derailed.

 

[saw792]

180 degree = 1 rad
1 degree = ~0.175rad or (pi / 180)

Let me bring it back!

180 degrees = pi radians, not 1 radian. 1 radian is defined as the angle formed from a sector of a circle where the radius of the circle = the arc length.

 

[Bribe]

My favorite is when I see noobs using the inlined versions of AngleBetweenPoints and PolarProjectionBJ, because you've got bj_RADTODEG to get the angle, and then a bj_DEGTORAD to utilize the angle