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360 degrees for full rotation

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AntonVit
Advanced Cheater

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Joined: 25 Jan 2014
Posts: 73

Posted: Sat Dec 17, 2016 3:19 am Post subject: 360 degrees for full rotation

Hi all.
I tryed to convert Cosinus and Sinus values to just degrees.
Cosinus and Sinus has value batween -1 to 1.
I need a values from 0 to 360 degrees, for rotat bgsprite in d3d on screen, but in game i have only cosinus and sinus. Need to convert it to degrees,
I tryed use many ways but not working

tryed:

Code:

a = MyCar_Sinus.Value
b = math.asin(a)
c = math.deg(b)

a1 = MyCar_Cosinus.Value
b1 = math.acos(a1)
c1 = math.deg(b1)

DegresesValue = c+c1

Code:

Tangens = MyCar_Sinus.Value / MyCar_Cosinus.Value
a = math.atan(Tangens)
a1 = math.deg(a)
DegresesValue = a1

Not work too

In net cant find way how to recolculate to just degreese.

Corroder
Grandmaster Cheater Supreme

Reputation: 75

Joined: 10 Apr 2015
Posts: 1667

Posted: Sat Dec 17, 2016 5:09 am Post subject:

math.deg , math.rad
Convert from radians to degrees and vice versa.

Use Cheat Engine 6.5.1 or higher (work with Lua 5.3)

Code:

x = math.sin(0.123)
a = math.deg(x)
s = string.char(39)

print(a)
print( string.format( "%6.2f", a )..s )
print( "or "..string.format( "%6.2f", a ).." ".."Degrees" )

-- Result
7.0296243464734
7.03'
or 7.03 Degrees

from your code :

Code:

MyCar_Sinus = -0.234
MyCar_Cosin = 0.234
Sin_deg = math.deg(math.asin(MyCar_Sinus))
Cos_deg = math.deg(math.acos(MyCar_Cosin))
DegresesValue1 = Sin_deg + Cos_deg
print("Degrees Value : "..DegresesValue1)

Tangens = MyCar_Sinus / MyCar_Cosin
Tan_deg = math.deg(math.atan(Tangens))
print("Degrees Value From Tangens : "..Tan_deg)

Degrees Value : 62.934632926341
Degrees Value From Tangens : -45.0

AntonVit
Advanced Cheater

Reputation: 0

Joined: 25 Jan 2014
Posts: 73

Posted: Sat Dec 17, 2016 6:23 am Post subject:

Thank
Tryed now on last 6.6 CE

Code:

It get me not correct value, i mean can not give me value from 0 to 360

Code:

Too can not get value from 0 to 360

Code:

Tangens = MyCar_Sinus / MyCar_Cosin
Tan_deg = math.deg(math.atan(Tangens))
print("Degrees Value From Tangens : "..Tan_deg)

Degrees Value : 62.934632926341
Degrees Value From Tangens : -45.0

And this script too can not get value from 0 to 360

With this script value can be form 0 to 180 (and back from 180 to 0)

Code:

MyCar_Cosin = -0.9983792901
Cos_deg = math.deg(math.acos(MyCar_Cosin))
DegresesValue1 = Cos_deg
print("Degrees Value : "..DegresesValue1)

So i have now 1 idea how recolculate to value from 0 - 360
Some later i try to test, and then write result

Corroder
Grandmaster Cheater Supreme

Reputation: 75

Joined: 10 Apr 2015
Posts: 1667

Posted: Sat Dec 17, 2016 8:40 am Post subject:

If you want the result as rounded floating number without decimal or point.

Code:

MyCar_Cosin = -0.9983792901
Cos_deg = math.deg(math.acos(MyCar_Cosin))
DegresesValue1 = Cos_deg
print("Degrees Value : "..string.format( "%6.f", DegresesValue1))

Degrees Value : 177

mgr.inz.Player
I post too much

Reputation: 218

Joined: 07 Nov 2008
Posts: 4438
Location: W kraju nad Wisla. UTC+01:00

Posted: Sat Dec 17, 2016 8:45 am Post subject:

To convert from radians to degrees you simply multiply it by
57.295779513082320876798154814105

so:

Code:

rotFromSin = math.asin(sinvalue) * 57.29577951308232

Code:

rotFromCos = math.acos(cosvalue) * 57.29577951308232

math.asin and math.acos takes value between -1 and 1 as argument.

rotFromSin value is between -90° and 90° (is 180° wide)
rotFromCos value is between 0° and 180° (is 180° wide)

You want rot between 0° and 360°

Now look at this:

Code:

https://www.google.pl/search?q=sin(x)%2C+cos(x)

As you see we can not determine our rot by just using one.

Also executing this should convince you:

Code:

function test(realRot)
local sinval = math.sin(realRot / 57.29577951308232)
local cosval = math.cos(realRot / 57.29577951308232)

-- let's pretend that sinval and cosval are taken from game process

local rotFromSin = math.asin(sinval) * 57.29577951308232
local rotFromCos = math.acos(cosval) * 57.29577951308232

return string.format('sinval:%8.3f cosval%8.3f asin%8.3f acos%8.3f',sinval,cosval,rotFromSin,rotFromCos)
end

print(test(10))
print(test(80))
print(test(100))
print(test(170))
print(test(190))
print(test(250))
print(test(290))

Result:

Code:

sinval: 0.174 cosval 0.985 asin 10.000 acos 10.000
sinval: 0.985 cosval 0.174 asin 80.000 acos 80.000
sinval: 0.985 cosval -0.174 asin 80.000 acos 100.000
sinval: 0.174 cosval -0.985 asin 10.000 acos 170.000
sinval: -0.174 cosval -0.985 asin -10.000 acos 170.000
sinval: -0.940 cosval -0.342 asin -70.000 acos 110.000
sinval: -0.940 cosval 0.342 asin -70.000 acos 70.000

You have to take into account both sinval and cosval.

Code:

function test(realRot)
local sinval = math.sin(realRot / 57.29577951308232)
local cosval = math.cos(realRot / 57.29577951308232)

-- let's pretend that sinval and cosval are taken from game process

local rotFromSin = math.asin(sinval) * 57.29577951308232
local rotFromCos = math.acos(cosval) * 57.29577951308232

local rot360 = rotFromCos
if sinval < 0 then rot360=360-rot360 end

return string.format('sinval:%8.3f cosval%8.3f asin%8.3f acos%8.3f rot360%8.3f',sinval,cosval,
rotFromSin,rotFromCos,rot360)
end

print(test(10))
print(test(80))
print(test(100))
print(test(170))
print(test(190))
print(test(250))
print(test(290))

Result:

Code:

sinval: 0.174 cosval 0.985 asin 10.000 acos 10.000 rot360 10.000
sinval: 0.985 cosval 0.174 asin 80.000 acos 80.000 rot360 80.000
sinval: 0.985 cosval -0.174 asin 80.000 acos 100.000 rot360 100.000
sinval: 0.174 cosval -0.985 asin 10.000 acos 170.000 rot360 170.000
sinval: -0.174 cosval -0.985 asin -10.000 acos 170.000 rot360 190.000
sinval: -0.940 cosval -0.342 asin -70.000 acos 110.000 rot360 250.000
sinval: -0.940 cosval 0.342 asin -70.000 acos 70.000 rot360 290.000

So, taking most important thing, you have to use this:

Code:

local rot360 = math.acos(cosval) * 57.29577951308232
if sinval < 0 then rot360 = 360 - rot360 end

If you don't like above solution with additional "IF THEN", you can also use this one liner:

Code:

local rot360 = (math.atan(sinval,cosval) * 57.29577951308232) % 360

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AntonVit
Advanced Cheater

Reputation: 0

Joined: 25 Jan 2014
Posts: 73

Posted: Sun Dec 18, 2016 1:35 am Post subject:

Thank All fol Help
Thank mgr.inz.Player, it very helpfull

This get me value from 0-360 perfectly

Code:

local rot360 = (math.atan(sinval,cosval) * 57.29577951308232) % 360

But what mean this "%" - it is a persent? How calculate it code in assembler. In lua engine work perfectly, bur i want write it to instuction, for not using timer in lua.

Tryed like this, not know what next

Code:

globalalloc(SinValue,100)
globalalloc(CosValue,100)
globalalloc(Tangens,100)
globalalloc(Atan,100)
globalalloc(DegresesConverterValue,100)

DegresesConverterValue:
dd (float)57.29577951308232

fld dword ptr [esi+250]
fstp dword ptr [SinValue]
fld dword ptr [esi+258]
fstp dword ptr [CosValue]

fld dword ptr [SinValue]
fmul dword ptr [DegresesConverterValue]
fstp dword ptr [SinValue]

fld dword ptr [CosValue]
fmul dword ptr [DegresesConverterValue]
fstp dword ptr [CosValue]

fld dword ptr [SinValue]
fdiv dword ptr [CosValue]
fstp dword ptr [Tangens]

fld dword ptr [Tangens]
fpatan
fstp dword ptr [Atan]

// ?

Tryed test

Code:

a = sinval/cosval //tangens
b = math.atan(a)
UDF1.CEEdit1.Text=b

a1 = math.atan(sinval,cosval)
UDF1.CEEdit2.Text=a1

And CEEdit1.Text ~= CEEdit2.Text
How work math.atan(sinval,cosval)?

Corroder
Grandmaster Cheater Supreme

Reputation: 75

Joined: 10 Apr 2015
Posts: 1667

Posted: Sun Dec 18, 2016 6:36 am Post subject:

If I am not wrong,

Code:

% is a modulo.
In computing, the modulo operation finds the remainder after division of one number by another (sometimes called modulus).

5 % 2 = 1
It's mean 5 divide by 2 will give 1 as remainder

mgr.inz.Player
I post too much

Reputation: 218

Joined: 07 Nov 2008
Posts: 4438
Location: W kraju nad Wisla. UTC+01:00

Posted: Sun Dec 18, 2016 7:38 am Post subject:

Code:

local rot360 = (math.atan(sinval,cosval) * 57.29577951308232) % 360

math.atan returns value between -𝛑 and 𝛑 (-180° and 180° after conversion)

From Lua 5.3 manual

Quote:

math.atan (y [, x])

Returns the arc tangent of y/x (in radians), but uses the signs of both parameters to find the quadrant of the result. (It also handles correctly the case of x being zero.)

The default value for x is 1, so that the call math.atan(y) returns the arc tangent of y.

That percent sign, e.g. "x % y" is the same as this "math.fmod (x, y)"
From Lua 5.3 manual

Quote:

math.fmod (x, y)

Returns the remainder of the division of x by y that rounds the quotient towards zero. (integer/float)

AntonVit wrote:

How calculate it code in assembler

The question is, do you really need 0° - 360°?
I think sprite in d3d should also accept this range: -180° - 180°

Code:

fld dword ptr [esi+250]
fld dword ptr [esi+258]
fpatan
fmul dword ptr [DegresesConverterValue]
fstp dword ptr [Atan]

EDIT:
this doesn't make any sense:

Code:

fld dword ptr [SinValue]
fmul dword ptr [DegresesConverterValue]
fstp dword ptr [SinValue]

Why did you multiply sin value?
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AntonVit
Advanced Cheater

Reputation: 0

Joined: 25 Jan 2014
Posts: 73

Posted: Sun Dec 18, 2016 7:53 am Post subject:

Quote:

EDIT:
this doesn't make any sense:

Code:

fld dword ptr [SinValue]
fmul dword ptr [DegresesConverterValue]
fstp dword ptr [SinValue]

Why did you multiply sin value?

Couse i thinked that for convert to degresse need to multiply (from this code)

Code:

local rot360 = (math.atan(sinval,cosval) * 57.29577951308232) % 360

So, i tested and sprite realy can rotate with this values (-180 and 180). And can 500 and more.
So now all fine, dont need anymore use assembler for calculate 0-360
i use now in lua

Code:

if sinval < 0 then rot360 = 360 - rot360 end

Thank you, and all for help.

mgr.inz.Player
I post too much

Reputation: 218

Joined: 07 Nov 2008
Posts: 4438
Location: W kraju nad Wisla. UTC+01:00

Posted: Sun Dec 18, 2016 8:09 am Post subject:

If it accepts -180° - 180°

just use this in asm:

Code:

fld dword ptr [esi+250]
fld dword ptr [esi+258]
fpatan
fmul dword ptr [DegresesConverterValue]
fstp dword ptr [Atan]

_________________

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My Borderlands2 tables

Recent CheatEngine builds

AntonVit
Advanced Cheater

Reputation: 0

Joined: 25 Jan 2014
Posts: 73

Posted: Sun Dec 18, 2016 9:25 am Post subject:

mgr.inz.Player wrote:

If it accepts -180° - 180°

just use this in asm:

Code:

fld dword ptr [esi+250]
fld dword ptr [esi+258]
fpatan
fmul dword ptr [DegresesConverterValue]
fstp dword ptr [Atan]

Ok, understand. Thank mgr.inz.Player.

AntonVit
Advanced Cheater

Reputation: 0

Joined: 25 Jan 2014
Posts: 73

Posted: Mon Dec 19, 2016 3:55 am Post subject:

mgr.inz.Player wrote:

If it accepts -180° - 180°

just use this in asm:

Code:

fld dword ptr [esi+250]
fld dword ptr [esi+258]
fpatan
fmul dword ptr [DegresesConverterValue]
fstp dword ptr [Atan]

Hi mgr.inz.Player.
Thank for asm script again. I tryed add 180 and now asm get me value from 0 - 360. But i already create racalculation on lua. But it asm too very interesting.
I used in first cosinus,sinus from car, now from camera, it more batter,

Code:

PLACEcamcossin:
fld dword ptr [ecx+00000180]
fld dword ptr [ecx+00000188]
fpatan
fmul dword ptr [DegresesConverterValue]
fadd dword ptr [Adds_180_Float]
fstp dword ptr [Full_360_Value]
movaps [ecx+00000190],xmm0
jmp BACKcamcossin

///////////////////////////
DegresesConverterValue:
dd (float)57.29577951308232
Adds_180_Float:
dd (float)180

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