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  1. #1
    Cypher's Avatar Kynox's Sister's Pimp
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    Mountain Climbing – The definitive guide

    I’m sure many of you have used the mountain climbing ‘trainers/hacks’. But do you actually understand how they work? That is what I wish to explain, the what, why and how of mountain climbing. Lets begin with an introduction to the subject material.


    Assumed knowledge:
    • Basic trigonometry knowledge
    • Basic game-hacking knowledge (addresses, pointers, offsets, etc)
    Quick revision, there are three ‘primary’ trigonometric functions, sine, cosine and tan (and their inverse function). We will be dealing with cosine in this guide.









    Note: All of the following is done in degrees, not radians.


    The mountain climb value is static in memory and is stored as a float (although most people give 4-byte values, this is wrong). The value stored in memory is “0.642787635326385” (approximately), but what does this mean exactly? It is the result of a trigonometric equation, or to be more specific, result of the ‘cosine’ function applied to a currently unknown angle. To find this angle we simply need to use the ‘inverse cosine’ function against our resultant.


    arcos(0.642787635326385) = 49.999998
    = 50 (approx)


    The reason we get 49.999998 is because computers can only store numbers to a certain accuracy in normal circumstances, because of this when we reverse the ratio we get an approximate angle (which ends up being rounded to 50).


    What does this mean to us exactly? 50° is just an angle, how does this help us? Well, think about it, when walking around there are certain mountains we can climb, and ones we can’t. Why? Because some mountains are too steep to climb according to the game engine. But how does the engine know? That is where the mountain climb value comes in. 50° is the maximum size of the angle we’re allowed to walk up in terrain, let me explain with a diagram.






    As you can see in the diagram, at any given point the game must work out whether we’re ‘allowed’ to walk up the terrain or not, based on the angle that the terrain inclines at. So by changing the value in the mountain climbing address, you are effectively changing the angle at which you can walk on. For example:
    • cos(60) = 0.5
    • cos(70) = 0.34202
    • cos(80) = 0.173648
    So as you can see, in terms of the float, the lower the number you put in the address, the steeper the terrain you can climb.


    I hope this has helped to explain mountain climbing and how it works. If you have any questions don’t hesitate to ask.


    P.S. This is my own original work (Chazwazza of MMOwned) steal it and I hunt you down.
    Last edited by Cypher; 08-12-2007 at 04:49 AM.

    Mountain Climbing – The definitive guide
  2. #2
    Cypher's Avatar Kynox's Sister's Pimp
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    Re: Mountain Climbing – The definitive guide

    Reserved, there may be more to come.
    Last edited by Cypher; 08-12-2007 at 04:49 AM.

  3. #3
    Alkhara Majere's Avatar Account not activated by Email
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    Re: Mountain Climbing – The definitive guide

    A excellent read.

    Take the time to at least scan through this.

  4. #4
    BrightChild's Avatar I AM 100$ SERIOUS
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    Re: Mountain Climbing – The definitive guide

    thats cool. i always like knowing how programs work and how computers think. thanks for this.
    +rep for your time spent teaching. (after 24 hours*sigh*)

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    Cypher's Avatar Kynox's Sister's Pimp
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    Re: Mountain Climbing – The definitive guide

    Originally Posted by Frost View Post
    thats cool. i always like knowing how programs work and how computers think. thanks for this.
    +rep for your time spent teaching. (after 24 hours*sigh*)
    Heh, that happens to me a lot too.

  6. #6
    Demonkunga's Avatar Banned
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    Re: Mountain Climbing – The definitive guide

    Thank you very much for the contribution Chaz
    • cos(60) = 0.5
    • cos(70) = 0.34202
    • cos(80) = 0.173648
    As this shows... is there a way to walk up 180* objects/mountains or objects/mountains slanted the opposite way?

  7. #7
    Cypher's Avatar Kynox's Sister's Pimp
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    Re: Mountain Climbing – The definitive guide

    Originally Posted by Demonkunga View Post
    Thank you very much for the contribution Chaz
    • cos(60) = 0.5
    • cos(70) = 0.34202
    • cos(80) = 0.173648
    As this shows... is there a way to walk up 180* objects/mountains or objects/mountains slanted the opposite way?
    Havn't tried it, but i doubt it, the physics engine would prevent walking on angles that large.
    Last edited by Cypher; 08-12-2007 at 10:47 AM.

  8. #8
    ministorm's Avatar Member
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    Re: Mountain Climbing – The definitive guide

    that was cool and all.....but i have no ****ing clue what it means :P

  9. #9
    Cypher's Avatar Kynox's Sister's Pimp
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    Re: Mountain Climbing – The definitive guide

    Originally Posted by ministorm View Post
    that was cool and all.....but i have no ****ing clue what it means :P
    Yes, I assumed people would say this. It was aimed at the more technically inclined users, if it goes over your head don't worry, you're not the only one.

  10. #10
    suicidity's Avatar Contributor
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    Re: Mountain Climbing – The definitive guide

    Knew this but was a good read and the trig just hit me for an idea. Thanks and +rep.

  11. #11
    pewpewlazerz's Avatar Contributor


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    Re: Mountain Climbing – The definitive guide

    so is there a way to change these values without a program or is it server side

  12. #12
    Cypher's Avatar Kynox's Sister's Pimp
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    Re: Mountain Climbing – The definitive guide

    Originally Posted by pewpewlazerz View Post
    so is there a way to change these values without a program or is it server side
    Ummm, thats what I've been explaining, how mountain climb hacks work. Mountain climb hacks exist, so that means that it's changeable with a program..... (And that it's not server side)

  13. #13
    suicidity's Avatar Contributor
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    Re: Mountain Climbing – The definitive guide

    Doh, :leave:|

    Slapped in the face with common sense?

  14. #14
    Cypher's Avatar Kynox's Sister's Pimp
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    Re: Mountain Climbing – The definitive guide

    Originally Posted by suicidity View Post
    Doh, :leave:|

    Slapped in the face with common sense?
    Pretty much.

  15. #15
    suicidity's Avatar Contributor
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    Re: Mountain Climbing – The definitive guide

    I just hope one of us get some points into their heads and get them out of their zombie mode ( + :drool and get them thinking .

    EDIT: And If it matters to you, you've helped me on

    1) My game development and the movement / aiming

    and

    2) My CS:S Aimbot is a little more accurate. Thanks
    Last edited by suicidity; 08-13-2007 at 02:46 AM.

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