Calculate RZ from X and Y - Printable Version

Calculate RZ from X and Y - Printable Version

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+--- Thread: Calculate RZ from X and Y (/showthread.php?tid=652461)

Calculate RZ from X and Y - m4karow - 11.04.2018

Hey.
I have some dumpster coordinates (exported from dev.prineside) and i want to re-create theese objects with the correct position. Could i calculate the RZ from the X and Y axis or i have to search for other methods?

Код:

	{2535.39, 1942.25, 10.6094},
	{2676.45, 1665.69, 10.6094},
	{2676.45, 1705.57, 10.6094},
	{2657.12, 1942.25, 10.6094},
	{2676.45, 1825.41, 10.6094},
	{2178.22, 1418.84, 10.6250},
	{2181.56, 1418.84, 10.6250},
	{1878.65, 683.77, 10.6250},
	{1881.38, 683.77, 10.6250},
	{1969.95, 693.74, 10.6250},
	{1975.70, 712.70, 10.6250},
	{2006.20, 706.45, 11.2500},
	{1884.84, 722.70, 10.6250},
	{1882.10, 722.70, 10.6250}

Re: Calculate RZ from X and Y - Mugala - 11.04.2018

RZ? I think that you mean Rot Z but don't understand whats ROT is this..
can you explain it better?

Re: Calculate RZ from X and Y - NaS - 12.04.2018

There's no direction given from these coordinates, so it's not possible to calculate a Z rotation from that coords alone, except you want to have the Z rotation pointing from one coordinate to the other.

Re: Calculate RZ from X and Y - Joe Staff - 12.04.2018

I forget the exact name of the function in pawn, I think it's atan2 or tan2.

atan2(y2-y1,x2-x1);

Or something to that regard.

Re: Calculate RZ from X and Y - NaS - 12.04.2018

Quote:

Originally Posted by Joe Staff

I forget the exact name of the function in pawn, I think it's atan2 or tan2.

atan2(y2-y1,x2-x1);

Or something to that regard.

The actual implementation uses atan2(x, y) but is clockwise.

atan2(y, x) also works, but it's counter-clockwise + 90.0° (x and y vectors switched).

So if you use it like you did, you must subtract 90 from the result, or use x, y and negate it.

Код:

a = atan2(vy, vx) - 90.0

Код:

a = -atan2(vx, vy)

Re: Calculate RZ from X and Y - m4karow - 12.04.2018

Thanks for the reply dude
Anyway i don't really understand what you sayin' with my sh!t english

But i tried both example that you said

Код:

a = atan2(vy, vx) - 90.0

and

Код:

DumpsterData[dumpsterid][dumpsterR] = (-atan2(X, Y) + 45.0);

and the result is almost that i want.

but if the rotation of the object has not equals to 0.0;

soo could you give me more advice to finish this? i want to 'clone' all of theese dumpsters with server sided objects.
i'm very bad in maths so im look like this now

Re: Calculate RZ from X and Y - NaS - 12.04.2018

Quote:

Originally Posted by m4karow

Thanks for the reply dude
Anyway i don't really understand what you sayin' with my sh!t english

But i tried both example that you said

Код:

a = atan2(vy, vx) - 90.0

and

Код:

DumpsterData[dumpsterid][dumpsterR] = (-atan2(X, Y) + 45.0);

and the result is almost that i want.

but if the rotation of the object has not equals to 0.0;

soo could you give me more advice to finish this? i want to 'clone' all of theese dumpsters with server sided objects.
i'm very bad in maths so im look like this now

You cannot just use the coordinates. That gives an angle relative to the SA Map Center - 0.0, 0.0 (which is completely wrong).

You need 2 points from which you can calculate an angle (in the direction from Point A to Point B), but this condition isn't met as each Dumpster just has one set of coordinates without any info about its direction.

There is no way to tell in which direction it should be facing just from its coords. In this case you'll have to rotate them manually.

Re: Calculate RZ from X and Y - Pottus - 12.04.2018

Look at the all SA object array.

https://sampforum.blast.hk/showthread.php?tid=415397

Re: Calculate RZ from X and Y - m4karow - 12.04.2018

oh my

this is what i was searching for!! thank you very much

Re: Calculate RZ from X and Y - Pottus - 12.04.2018

Just do something like this......

Код:

Float:GetDistanceBetweenPoints3D(Float:x1,Float:y1,Float:z1,Float:x2,Float:y2,Float:z2){
    return VectorSize(x1-x2,y1-y2,z1-z2);
}

SaveModelsInRange(modelid, Float:x, Float:y, Float:z, Float:range, file[])
{
	if(isnull(file))
	    return 0;

	new File:f, tmp[128];

	f = fopen(file, io_write);


	for(new i = 0; i < sizeof(SearchData); i++)
	{
	    if( (modelid == SearchData[i][Search_Model]) &&
			(GetDistanceBetweenPoints3D(x, y, z, SearchData[i][SearchX], SearchData[i][SearchY], SearchData[i][SearchZ]) < range) )
		{
		    format(tmp, sizeof(tmp), "{ %f, %f, %f, %f, %f, %f, %f }, \r\n",
				SearchData[i][SearchX], SearchData[i][SearchY], SearchData[i][SearchZ],
		        SearchData[i][SearchRX], SearchData[i][SearchRY], SearchData[i][SearchRZ]
		    );
		    fwrite(f, tmp);
		}
	}
	
	fclose(f);

	return 1;
}