Snippet Movement Calculation

[kingkingyyk3]

/////////////////////////////////////////////////////////////////////////////////////////////
//  Functions :
//
//  GetDisplacementLoc(locationA,locationB) -> real(Distance Between 2 points)
//  GetDisplacement(x1,y1,x2,y2) -> real(Distance Between 2 points)
//  GetVelocityLoc(locationA,locationB,time) -> real(X range/second)
//  GetVelocity(x1,y1,x2,y2,time) -> real(X range/second)
//  GetAcceleration(final velocity, initial velocity, time) -> range/second-1
//
//  Recommended using XY since it is faster.
//  P/S : I found the the unit does not move unitformly in warcraft engine.
//        They have acceleration and decceleration
/////////////////////////////////////////////////////////////////////////////////////////////
library MovementCalculating

    function GetDisplacementLoc takes location locA, location locB returns real
        local real locAX = GetLocationX(locA)
        local real locAY = GetLocationY(locA)
        local real locBX = GetLocationX(locB)
        local real locBY = GetLocationY(locB) 
        return SquareRoot((locBX - locAX) * (locBX - locAX) + (locBY - locAY) * (locBY - locAY))
        //Return distance between 2 points
    endfunction

    function GetDisplacement takes real x1, real y1, real x2, real y2 returns real 
        return SquareRoot((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1))
        //Return distance between 2 points
    endfunction
    
    function GetVelocityLoc takes location locA, location locB, real time returns real
        return GetDisplacementLoc(locA, locB)/time
        //Return Velocity
    endfunction
    
    function GetVelocity takes real x1, real y1, real x2, real y2, real time returns real 
        return GetDisplacement(x1, y1, x2, y2)/time
        //Return Velocity
    endfunction
    
    function GetAcceleration takes real v, real u, real time returns real
        //V = Final Velocity
        //U = Initial Velocity
        return (v-u)/time
        //Return acceleration
        //If returned value is negative, then it is decceleration
        //If returned value is 0, then it is neither accelerates or decelerates but is constant velocity
    endfunction
   
   
endlibrary

Hmm, i think it is useful in calculating APM(s).
I have attached a map here for u guys to test it!

 

[Trollvottel]

Looks kind of useless to me. Every 12 year old child would be able to do this (if it knows jass and is not too stupid).

Also:

 function GetDisplacementLoc takes location locA, location locB returns real
        local real locAX = GetLocationX(locA)
        local real locAY = GetLocationY(locA)
        local real locBX = GetLocationX(locB)
        local real locBY = GetLocationY(locB) 
        return SquareRoot((locBX - locAX) * (locBX - locAX) + (locBY - locAY) * (locBY - locAY))
        //Return distance between 2 points
    endfunction

this looks like crap to me, its like the DistanceBetweenPoints BJ-function but worse, since it uses more calculations and more variables.

 

[kingkingyyk3]

So I recommended use XY. The Location is slower but I made it also for location users easy to use it.

 

[Trollvottel]

But why do you even implement a function if Blizzard provides a better version of it?

 

[wraithseeker]

Why not use the BJ then?

I'm not sure but doesn't a velocity have x y and z?

 

[_whelp]

How do I use this?

According to Trollvottel, I wouldn't understand this because I'm ten.

 

[kingkingyyk3]

You also can use BJ... Is the same. But XY is the best.

 

[_whelp]

Can't you just write down the formula?
It's pretty easy to remember an write anyways.

 

[wraithseeker]

They are not the same...

function DistanceBetweenPoints takes location locA, location locB returns real
    local real dx = GetLocationX(locB) - GetLocationX(locA)
    local real dy = GetLocationY(locB) - GetLocationY(locA)
    return SquareRoot(dx * dx + dy * dy)
endfunction

 

[kingkingyyk3]

I made this to neaten code.

 

[Flare]

How do I use this?

According to Trollvottel, I wouldn't understand this because I'm ten.

He said 12, not 10 (although you might do this sort of math at that age anyway)

Overall, it's just basic math and not hard for anyone to do. The location one is pointless since the BJ function already exists and most people who use JASS would be using coordinates anyway

 

[Tyrande_ma3x]

> I made this to neaten code.
There's nothing neat about it - you just renamed the BJs...

 

[kingkingyyk3]

I mean other than the GetDistance function.

 

[_whelp]

@Flare

It was

"wouldn't",

not "would".

 

[wraithseeker]

function GetDisplacement takes real x1, real y1, real x2, real y2 returns real 
        return SquareRoot((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1))
        //Return distance between 2 points
    endfunction

 return SquareRoot((locBX - locAX) * (locBX - locAX) + (locBY - locAY) * (locBY - locAY))

Identical and totally the same.

 

[kingkingyyk3]

Is this faster?

function GetDisplacement takes real x1, real y1, real x2, real y2 returns real 
        return x1*x1 -2*x1*x2 +x2*x2 + y1*y1-2*y1*y2+y2*y2
endfunction

Any ideas?

 

[_whelp]

Err... it becomes less legible for us(whoever is ten) ten year olds.

 

[Trollvottel]

@Flare

It was

"wouldn't",

not "would".

And i didnt say 10 year olds couldnt understand. but have you done linear functions or pythagoras? (This system is only pythagoras and linear functions)

Is this faster?

function GetDisplacement takes real x1, real y1, real x2, real y2 returns real 
        return x1*x1 -2*x1*x2 +x2*x2 + y1*y1-2*y1*y2+y2*y2
endfunction

Any ideas?

Does it even work? Looks weird to me, which formula did you use to make this?

 

[_whelp]

[NoSarcasm]
Linear functions and what? I can't seem to understand...
[/NoSarcasm]

 

[wraithseeker]

I don't know about

function GetDisplacement takes real x1, real y1, real x2, real y2 returns real 
        return x1*x1 -2*x1*x2 +x2*x2 + y1*y1-2*y1*y2+y2*y2
endfunction

Where did that -2 come from?