Looking for formula help

decadre · #5 06-18-2006, 03:24 PM

ok, I'm having no luck getting the same answer that I get from Taco's Tool.

The in-game map has x-coordinates from;

Code:

 80 to -140 left to right

and y-coordinates from;

Code:

 -80 to 140 top to bottom

my map is;

Code:

 1000 pixels wide, and 966 pixels high

I'm just going to work the x-axis and hopefully someone will tell me what's wrong here.

From Bobbles post I get the following variables from the map info;

Code:

 
LOC_Ax = 80
LOC_Bx = -140
MAP_Ax = 0
MAP_Bx = 1000

So to get wdpp_x;

Code:

           LOC_Bx - LOC_Ax
wdpp_x = --------------------
           MAP_Bx - MAP_Ax

          -140 - 80       -220
wdpp_x = -----------  =  ------ = -0.22
          1000 - 0        1000

Ok, so according to Bobble MAP_0x is 0.
So, all I need now are LOC_0x and LOC_x.

LOC_x in this example will be 0 and 40 (2 different examples)

to get LOC_0x, we do;

Code:

LOC_0x = LOC_Bx - (wdpp_x * (MAP_Bx - MAP_0x) )
LOC_0x = -140 - (-0.22 * (1000 - 0) )
LOC_0x = 80

Ok, so to get my x-coordinate as far as I understand it, I just have to plug my numbers into this formula;

Code:

         (LOC_0x + LOC_x)
MAP_x  = ----------------  +  Map_0x - (IconW / 2)
               wdpp_x

for x = 0
         (80 + 0)
MAP_x  = ----------------  +  0 - (2)
               -0.22

MAP_x = -366 and Taco Program gives me an x-coordinate of 356.
Barring +/- sign, pretty close.

and for x = 40
         (80 + 40)
MAP_x  = ----------------  +  0 - (2)
               -0.22

MAP_x = -547 and Taco Program gives me an x-coordinate of 178.

Anyone know what I'm missing, not understanding, or just plain screwing up?