floatsin, floatcos - Printable Version

floatsin, floatcos - Printable Version

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+---- Thread: floatsin, floatcos (/showthread.php?tid=150212)

floatsin, floatcos - Cank - 25.05.2010

can someone explain me these two functions?

wiki doesnt help.

Re: floatsin, floatcos - iJumbo - 25.05.2010

like this ??

Код:

	new Float:x,Float:y,Float:z;
	new Float:xx2,Float:yy2,Float:az;
	new Float:x3,Float:y3;
	new Float:x4,Float:y4;
	new Float:x5,Float:y5;
	new Float:x6,Float:y6;
	new Float:xi,Float:yi;
	new Float:xi2,Float:yi2;
	if( strcmp(cmdtext, "/kame", true) == 0)
	{
	GetPlayerPos(playerid,x,y,z);
	GetPlayerFacingAngle(playerid, az);
	xi = x + (5 * floatsin(-az, degrees));
	yi = y + (5 * floatcos(-az, degrees));
	xx2 = x + (10 * floatsin(-az, degrees));
	yy2 = y + (10 * floatcos(-az, degrees));
	x3 = x + (15 * floatsin(-az, degrees));
	y3 = y + (15 * floatcos(-az, degrees));
	x4 = x + (20 * floatsin(-az, degrees));
	y4 = y + (20 * floatcos(-az, degrees));
	x5 = x + (25 * floatsin(-az, degrees));
	y5 = y + (25 * floatcos(-az, degrees));
	x6 = x + (30 * floatsin(-az, degrees));
	y6 = y + (30 * floatcos(-az, degrees));
	CreateExplosion(xi2,yi2,z-1,11,0);
	CreateExplosion(xi,yi,z-1,11,2.5);
	CreateExplosion(xx2,yy2,z-1,11,2.5);
	CreateExplosion(x3,y3,z-1,11,2.5);
	CreateExplosion(x4,y4,z-1,11,2.5);
	CreateExplosion(x5,y5,z-1,11,2.5);
	CreateExplosion(x6,y6,z-1,11,10);
	return 1;
}

Re: floatsin, floatcos - Cank - 25.05.2010

yes, but i dont understand how these functions work.
what are the parameters and what are these functions useful for?

Re: floatsin, floatcos - [HiC]TheKiller - 25.05.2010

Well for a explanation on what sin, cos and tan actually are you can find it on wikipedia http://en.wikipedia.org/wiki/Sin_cos_tan. That function pretty much makes the sin/cos/tan into a float value. Like 5235325.5523 =]. I'm not very good at Trigonometry so wait for a better answer =P.

Re: floatsin, floatcos - Babul - 25.05.2010

these functions are useful for creating a circle. if you want a circle of cars at dry lake, then try this:

Код:

public OnPlayerCommandText(playerid, cmdtext[])
{
//... start pasting the command from here
	if (strcmp("/CarsDryLake", cmdtext, true) == 0)
	{
		new Float:X,Float:Y,Float:Z;
		GetPlayerPos(playerid,X,Y,Z);
		for(new i = 0; i<360; i+=5)
		{
			new Float:CX,Float:CY,Float:CZ,Float:CA;
			X=5.3426;
			Y=1521.4684;
			Z=12.7500;
			CX=X+(40*floatsin(i,degrees));
			CY=Y+(40*floatcos(i,degrees));
			CZ=Z;
			CA=(-i+180)%360;
			CreateVehicle(412,CX,CY,CZ,CA,-1,-1,10);
		}
		SendClientMessage(playerid,0xafafff77,"Vehicle(s) spawned.");
		return 1;
	}
//... until here
}

X=5.3426 Y=1521.4684 Z=12.7500 << these are the coordinates at drylake. the "basis" position, its the middle point,
40*floatsin << the 40 is the radius (x-axis), the y-axis will be calculated with the floatcos,
if you want to create an ellipse, then modify one of those "40", maybe like:
CX=X+(50*floatsin(i,degrees));
CY=Y+(30*floatcos(i,degrees));
you can define how "dense" the cars are by the angle (degrees), its the 5 here:
for(new i = 0; i<360; i+=5) << set it to a lower value if you expand the circle to maybe 3 or 4 degrees

Re: floatsin, floatcos - Cank - 25.05.2010

thanks