SHK_intercept

[shuko 45]

Just another thing I made for a mission of mine. I wanted to spawn enemies in front of the player group. How to get the right direction and thus position?

This script will tracking a group and record it's positions in given interval. You can call the function any time to get the average direction, aka a guesstimate where the group to heading to.

As usual, it's a 0.1 version. I'll improve it as bugs and new ideas come up.

Starting Tracking

Required Parameters:
 0 Group/Object  Group to track.

Optional Parameters:
 1 Number        Recording interval, delay in seconds between position checks.
 2 Number        History size, number of newest positions to remember.

Starting Examples:
 nul = dude1 execvm "SHK_intercept.sqf";
 nul = grpWest1 execvm "SHK_intercept.sqf";
 nul = [dude2,5,20] execvm "SHK_intercept.sqf";

Getting the Direction

Function's name is SHK_Intercept_getDir. It takes an object or a group as a parameter
and returns a direction between 0 and 360.

Required Parameters:
 0 Group/Object  Group to track.

Optional Parameters:
 1 Number      Position info age when calculating direction. Given number is the
               Nth newest position to compare the current position.
               Example: positions are [a,b,c,d,e,f,g], you give 3 as info age. The
               position to be used for direction calculation is e.
   Float       Range 0-1, which is applied to the size of the history. Example: size
               is 10 and age is 0.5, the dir will be calculated from the 5th
               position in the history. Or 0.2, the position would be 9th (2nd newest).
 2 Number      Sample size. Number of positions between newest and the one determined
               by info age, which is included in the average calculation as well.

Examples:
 dir = grpWest1 call SHK_Intercept_getDir;
 dir = [grpWest1,0.3] call SHK_Intercept_getDir;
 dir = [grpWest1,10,5] call SHK_Intercept_getDir;

SHK_intercept.sqf

SHK_intercept.rar

Example pic 1

Example pic 2

Edited March 12, 2011 by Shuko

[demonized 16]

pretty cool, will test this out.

[Two Dogs 10]

This has been a long time coming.

Thanks!

[cuel 23]

How would I get a position, say, 100-200 metres infront of the player using this direction?

[kylania 546]

// Get a random position within 100-200m and in a 90 degree arc in front of the player's vehicle/player.
       _unit = player;
_randDir = getDir vehicle _unit - 45;
_randDir = _randDir + random(90);
_randDist = (random 100) + 100;
_spawnPosition =	[(getPos vehicle _unit select 0) + (_randDist * sin(_randDir)), (getPos vehicle _unit select 1) + (_randDist * cos(_randDir)), 0];

[cuel 23]

Maths is not my best skill. Thanks alot.

[KeyCat 126]

Thanks Shuko!

Just discovered your script link in your sig as well, lots of good stuff there.

/KC