Function - Printable Version

Function - Printable Version

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+--- Thread: Function (/showthread.php?tid=325042)

Function - BaubaS - 11.03.2012

Hello all, I came here with a question ^^. Does anybody haves a function which would calculate distance from point X to point Y?

For example,

Point X - SFPD
Point Y - LSPD.

It would calculate distance from SFPD to LSPD in metres.

Re: Function - coole210 - 11.03.2012

pawn Код:

//Distances:
new Float:Distances[3];
Distances[0] = floatsub(X1,X2);//LSPDX,SFPDX - X Offset Distance
Distances[1] = floatsub(Y1,Y2);//LSPDY,SFPDY - Y Offset Distance
Distances[2] = floatsub(Z1,Z2);//LSPDZ,SFPDZ - Z Offset Distance

Guessed, but in theory it should work

Re: Function - Stylock - 11.03.2012

Quote:

Originally Posted by coole210

pawn Код:

//Distances:
new Float:Distances[3];
Distances[0] = floatsub(X1,X2);//LSPDX,SFPDX - X Offset Distance
Distances[1] = floatsub(Y1,Y2);//LSPDY,SFPDY - Y Offset Distance
Distances[2] = floatsub(Z1,Z2);//LSPDZ,SFPDZ - Z Offset Distance

Guessed, but in theory it should work

Utter fail. This is the correct way:

Код:

floatsqroot((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2) + (z1 - z2) * (z1 - z2));

That calculates distance in game units (I assume it's feet).To convert that to meters, divide it by 3.28083989501312.

Re: Function - BaubaS - 11.03.2012

YJIET, thank you, but is it going to work?

For metres:

pawn Код:

new Float: Distance = floatsqroot((SFPD_X - LSPD_X) * (SFPD_X - LSPD_X) + (SFPD_Y - LSPD_Y) * (SFPD_Y - LSPD_Y) + (SFPD_Z - LSPD_Z) * (SFPD_Z - LSPD_Z)),
    Float: Metres = 3.28083989501312,
    Float: Result
;
Result = floatdiv(Distance / Metres);
printf("Distance from LSPD to LSPD (in metres): %d", Result);

For kilometres:

pawn Код:

new Float: Distance = floatsqroot((SFPD_X - LSPD_X) * (SFPD_X - LSPD_X) + (SFPD_Y - LSPD_Y) * (SFPD_Y - LSPD_Y) + (SFPD_Z - LSPD_Z) * (SFPD_Z - LSPD_Z)),
    Float: Metres = 3.28083989501312,
    Float: Kilometres,
    Float: Result
;
Result     = floatdiv(Distance, Metres);
Kilometres = floatdiv(Result, 1000);
printf("Distance from SFPD to LSPD (in kilometres): %d", Kilometres);

Re: Function - Stylock - 11.03.2012

Yeah, that works but you can make it simpler:

pawn Код:

//meter
distance = floatsqroot((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2) + (z1 - z2) * (z1 - z2)) / 3.2808;  
//kilometer
distance = floatsqroot((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2) + (z1 - z2) * (z1 - z2)) / 3.2808 / 1000.0;

Re: Function - BaubaS - 11.03.2012

Okay, thank you very much. And one more question: the print will be like 5.555555555555, so If I want to show only first number after ., I must use 0.1f?

Re: Function - Vince - 11.03.2012

San Andreas uses the metric system, so it is actually meters already.

Re: Function - Stylock - 11.03.2012

@BaubaS: Yes.

Quote:

Originally Posted by Vince

San Andreas uses the metric system, so it is actually meters already.

You learn something new every day.