[C# Code] Arch tool facing out of process

[counted]

Working on adding Archeology to my bot

I read one of the other arch threads and saw the Quaternion reference which helped once i got to the unpack routine and the angle calc routine.

I used the Tom_Rus Ida database to get to the actual code.

I tested this on 10 or so arch dig sites and it worked on all of them.

                var packed = TC.Wr.Read<long>(TC.Wr.Read<uint>(TC.Wr.Read<uint>(node.Address + 0x1c8) + 0x4) + 0x20 + 0x100);

                q.x = (packed >> 42) * (1.0f / 2097152.0f);

                q.y = (((packed << 22) >> 32) >> 11) * (1.0f / 1048576.0f);

                q.z = (packed << 43 >> 43) * (1.0f / 1048576.0f);

                q.w = q.x * q.x + q.y * q.y + q.z * q.z;

                if (Math.Abs(q.w - 1.0f) >= (1.0f / 1048576.0f))
                    q.w = (float)Math.Sqrt(1.0f - q.w);
                else
                    q.w = 0.0f;

                var Y = 2 * q.z * q.w + 2 * q.x * q.y;

                var X = 1 - 2 * q.y * q.y - 2 * q.z * q.z;

                var result = Math.Atan2(Y, X);  // answer in radians 

                SystemLog("Angle = " + result * 180 / Math.PI);  // if angle is negative add 360 degrees to it

[mazer]

sorry for bumping an old thread,
but i guess this is the only way to get the facing of the survey tool while staying out of process.

i've tried OP's code and get a strage behavior when the angle of the survey tool is greater than 180°.
i've debugged the whole last day and have ask a whole lot of people but nobody was able to help me.

dump of the vars and a possible error in the calculation below.

so, here is the code i'm using:

ulong packed = Memory.ReadUInt64(Memory.ReadUInt(Memory.ReadUInt(ObjectBaseAdress + 0x1c8) + 0x4) + (0x20 + 0x100));

Console.WriteLine("[DEBUG] Packed: " + packed.ToString());


            var x = (packed >> 42) * (1.0f / 2097152.0f);
            var y = (((packed << 22) >> 32) >> 11) * (1.0f / 1048576.0f);
            var z = (packed << 43 >> 43) * (1.0f / 1048576.0f);
            var w = x * x + y * y + z * z;


            Console.WriteLine("[DEBUG] x: " + x.ToString() + " " + " y: " + y.ToString() + " " + " z: " + z.ToString() + " " + " w: " + w.ToString());




            if (Math.Abs(w - 1.0f) >= (1.0f / 1048576.0f))
            {
                Console.WriteLine("[DEBUG] w if match");
                w = (float)Math.Sqrt(1.0f - w);
            }
            else
            {
                Console.WriteLine("[DEBUG] w if no match");
                w = 0.0f;
            }


            Console.WriteLine("[DEBUG] w after if: " + w.ToString());


            var Y = 2 * z * w + 2 * x * y;
            var X = 1 - 2 * y * y - 2 * z * z;


            Console.WriteLine("[DEBUG] Y: " + Y.ToString() + " " + " X: " + X.ToString());


            var result = Math.Atan2(Y, X);


            var angle = result * 180 / Math.PI;


            Console.WriteLine("[DEBUG] angle pre if: " + angle.ToString());


            if (angle < 0)
            {
                angle = angle + 360;
            }


            Console.WriteLine("[DEBUG] result: " + result.ToString());
            Console.WriteLine("[DEBUG] angle: " + angle.ToString());


            return angle;

yes it's basicly the same as the OP's code.

as stated, the calculation works flawless for angles smaller than 180°


here is a dump of the vars when everthing works:
angle smaller 180°

[DEBUG] Packed: 365024
[DEBUG] x: 0  y: 0  z: 0,348114  w: 0,1211834
[DEBUG] w if match
[DEBUG] w after if: 0,9374522
[DEBUG] Y: 0,6526805  X: 0,7576333
[DEBUG] angle pre if: 40,7440068657897
[DEBUG] result: 0,711117070263206
[DEBUG] angle: 40,7440068657897
[DEBUG] My Rotation: 46,533
[DEBUG] Survey Angle: 40,744

so, no big deal here.
next is a dump when it doesn't work:
angle larger 180°

[DEBUG] Packed: 1133353
[DEBUG] x: 0  y: 0  z: 1,08085  w: 1,168236
[DEBUG] w if match
[DEBUG] w after if: n. def.
[DEBUG] Y: n. def.  X: -1,336472
[DEBUG] angle pre if: n. def.
[DEBUG] result: n. def.
[DEBUG] angle: n. def.
[DEBUG] My Rotation: 226,264
[DEBUG] Survey Angle: n. def.

so this is the problem.

things i noticed this far:
- x and y are always 0, no problem, i don't need them
- the if condition is always met
- if w is larger than 1, the math.sqrt will fail! because the value (1.0f - w) is negative.
- when the code works, z and w are below 1
- when the code fails, z and w are above 1


i can't find the solution to this problem. i've search the net and read stuff about the quaternion calculation.
if someone could help me with this or point me in the right direction i would really appreciate this.

thanks

[guizmows]

why ain't you reading directly gameobject matrice?

[mazer]

why ain't you reading directly gameobject matrice?

i don't quite understand what you mean, could you give me a link or an example?

[guizmows]

each object in DirectX has a matrice (offset 1D0 if I rememeber correctly). read it, and you will be able to find correct facing

[mazer]

each object in DirectX has a matrice (offset 1D0 if I rememeber correctly). read it, and you will be able to find correct facing

at this point i want to stick to wow memory.
i have never read DirectX data / memory.

there must be another way to do so.

but thanks for your help

[guizmows]

data is in wow memory : [objBase + 0x1D0] (check CGGameObject_C__GetMatrix in Wow)

[mazer]

data is in wow memory : [objBase + 0x1D0] (check CGGameObject_C__GetMatrix in Wow)

will look at this, firing up ida now
thanks!

[mazer]

ok, i was able to get the DX date of the object.
part of the values look like a rotation matrix.

a friend of mine helped me with the calculation (he forgot to give me the formula tho)
the problem was that the resulting angle was wired.

when i dumb the values, i place my char on the survey tool and facing roughly in the same direction,
so i got my rotation angle and think it should nearly be the same as the rotation of the tool.
but they never match.


do i miss something? is the resulting angle some sort of relative angle to north or something?
can't figure it out.

btw, here is a dump of 5 different locations on the same digsite:
[DEBUG] dxdata_0: -0,235289931297302 [DEBUG] dxdata_1: -0,971925258636475 [DEB - Pastebin.com

[guizmows]

I hope this will help you : Rasterisation - Wikipedia, the free encyclopedia

besically, you need to calculate the arc tangeant between two points.

[mazer]

I hope this will help you : Rasterisation - Wikipedia, the free encyclopedia

besically, you need to calculate the arc tangeant between two points.

thanks, i will take a look.
i hope to get this running soon...

[mazer]

thanks, i will take a look.
i hope to get this running soon...

ok, this is too heavy for me and far behind any of my knowledge.
it was hard to even understand what a rotation matrix is and does.
guess i have to give up at this point.
3 days of research (of things i never heard before) were to much for my little brain

[!@^^@!]

ok, this is too heavy for me and far behind any of my knowledge.
it was hard to even understand what a rotation matrix is and does.
guess i have to give up at this point.
3 days of research (of things i never heard before) were to much for my little brain

The topic is called linear algebra and while it's difficult to research on your own, khanacadamy has some very good lessons about it that you might want to check out: Khan Academy
It's a very interesting topic and is the basis of most modern graphics calculations

[counted]

Getting back into Arch.

the location of the packed number is now.

long packed = Mem.Read<long>(address + 0x120 + 0x2;

address is base survey tool gameobject address.

if you want to work in degrees, remember to add 360 if the radian answer is negative.

-counted

[Holico]

That Thread was more than 5 years old >.<