[ғαιιοцт]

I was making a function to set the player's facing angle to a point(x and y) on the map
it's like SetCameraLookAt but for the player and only x and y coord.

this is what i already had:

pawn Код:

stock SetPlayerLookAt(playerid, Float:x, Float:y)
{
    new Float:Px, Float:Py, Float: Pa;
    GetPlayerPos(playerid, Px, Py, Pa);
    Pa = atan(floatdiv(floatsub(y, Py), floatsub(x, Px))); //pythagoras -> this is the code that doesn't work when i use negative floats

    new Float:Par = floatadd((floatsub(Pa, (floatmul(Pa, 2)))), 90); //calculating the angle in gta from the angle i got with pythagoras
(see [url]http://forum.sa-mp.com/index.php?topic=89950.0[/url]) this code works good

    SetPlayerFacingAngle(playerid, Par);

    new text[64];
    format(text, sizeof text, "real angle = %f | gta angle = %f", Pa, Par);
    SendClientMessage(playerid, 0xFF3399AA, text); //just debugging
}

it only works if the X and Y are positive but when they're negative it sets the wrong facingangle

[[LDT]LuxurY]

please check this topic http://forum.sa-mp.com/index.php?topic=45996.0

[ғαιιοцт]

Quote:

Originally Posted by [LDT LuxurY ] please check this topic http://forum.sa-mp.com/index.php?topic=45996.0

Quote:

stock Float:AngleToPoint(Float,Float:y,Float1,Float: y1) { new Float:newang = atan(floatabs((x-x1)/(y-y1))); if (x1 <= x && y1 >= y) newang += 90.0; else if (x1 < x && y1 < y) newang += 180.0; else if (x1 >= x && y1 <= y) newang += 270.0; if (newang >= 360.0) newang = 0.0; return newang; }

so i was on my right way
does this code works?

[[LDT]LuxurY]

Quote:

Originally Posted by °ғαιιοцт° Quote: Originally Posted by [LDT LuxurY ] please check this topic http://forum.sa-mp.com/index.php?topic=45996.0 Quote: stock Float:AngleToPoint(Float,Float:y,Float1,Float: y1) { new Float:newang = atan(floatabs((x-x1)/(y-y1))); if (x1 <= x && y1 >= y) newang += 90.0; else if (x1 < x && y1 < y) newang += 180.0; else if (x1 >= x && y1 <= y) newang += 270.0; if (newang >= 360.0) newang = 0.0; return newang; } so i was on my right way does this code works?

certainly

[ғαιιοцт]

i get this error when adding the code:

Код:

warning 208: function with tag result used before definition, forcing reparse

line = stock Float:AngleToPoint(Float,Float:y,Float1,Float: y1)

[Marcel]

Straight from pawn-lang.pdf:

Quote:

Originally Posted by pawn-lang.pdf function with tag result used before definition, forcing User-defined oper- ators: 86 Forward declara- tion: 82 reparse When a function is “used” (invoked) before being declared, and that function returns a value with a tag name, the parser must make an extra pass over the source code, because the presence of the tag name may change the interpretation of operators (in the presence of user-defined operators). You can speed up the parsing/compilation process by declaring the relevant functions before using them.

[ғαιιοцт]

Quote:

Originally Posted by Marcel Straight from pawn-lang.pdf: Quote: Originally Posted by pawn-lang.pdf function with tag result used before definition, forcing User-defined oper- ators: 86 Forward declara- tion: 82 reparse When a function is “used” (invoked) before being declared, and that function returns a value with a tag name, the parser must make an extra pass over the source code, because the presence of the tag name may change the interpretation of operators (in the presence of user-defined operators). You can speed up the parsing/compilation process by declaring the relevant functions before using them.

thanks

@ [LDT]LuxurY:

The code is ready now

Код:

stock SetPlayerLookAt(playerid, Float:x, Float:y)
{
	new Float:Px, Float:Py, Float: Pa;
	GetPlayerPos(playerid, Px, Py, Pa);
	Pa = floatabs(atan((y-Py)/(x-Px)));
	if (x <= Px && y >= Py) Pa = floatsub(180, Pa);
	else if (x < Px && y < Py) Pa = floatadd(Pa, 180);
	else if (x >= Px && y <= Py) Pa = floatsub(360.0, Pa);
	Pa = floatsub(Pa, 90.0);
	if (Pa >= 360.0) Pa = floatsub(Pa, 360.0);
	SetPlayerFacingAngle(playerid, Pa);
}

ps i had to do
Pa = floatadd(Pa, 90.0);
you forgot that
it's because the angles in gta are 90° less (it's 90° rotated)
and why did you do
if (Pa >= 360.0) Pa = 0.0;
?
wtf if the value is higher than 360 it'll become 0°



another thing:
wiki is a little wrong here https://sampwiki.blast.hk/wiki/SetPlayerFacingAngle
it says:

Quote:

north (0) | (270)west- -east (90) (Good way to remember: Never Eat Shredded Wheat) | south (180)

but it should be:

Quote:

north (0) | (90)west- -east (270) (Good way to remember: Never Eat Shredded Wheat) | south (180)