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Is player facing speed camera - Printable Version

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+--- Thread: Is player facing speed camera (/showthread.php?tid=636623)


Is player facing speed camera - Bigwebicek - 01.07.2017

Hello there,
I need to check if is player's vehicle facing speed camera (with maximum difference about 40 degrees), so that if player'd speed over the camera, it will trigger alert to the police. But, if player won't be facing the camera (he would be not like this ( > < ), it won't get triggered.

I need it to be triggered just like this, > <, not like this > > or > V or this > ^

It shouldn't be constant, I will place more speed cameras and I need it to work on every camera.

Camera angle is stored in spdcamEnum[i][scam_RZ], then in spdcma, vehicle's angle is stored in angle.

Here is my actual code.

Код:
new
   Float:spdcma= spdcamEnum[i][scam_RZ]-180,
   Float:angle;
			    
   GetVehicleZAngle(GetPlayerVehicleID(playerid), angle);
			
   ValidateDegree(spdcma); // After editing object degrees can be negative or bigger than 360 degrees, so lets fix it.
   ValidateDegree(angle);
			
   if(spdcma < angle + 45 && spdcma > angle - 45)
       continue; //Player shouldn't be facing speed camera


//-------------------------

ValidateDegree(&Float:degree)
{
    if(degree < 0.0)
		degree = degree * -1 + 180;

	if(degree > 360)
	    degree -= 360.0;
}
This code appears to not work, as it is working just in some cases, it appears to be random. Does anyone have better solution, please?

> - speed cam
< / v / ^ - player's vehicle

Re: Is player facing speed camera - Nero_3D - 01.07.2017

The first case in ValidateDegree is strange, changed it to + 360.0, also added a while loop

PHP код:
ValidateDegree(& Float:degree) {
    if(degree < 0.0) {
        while((degree += 360.0) < 0.0) {}
    } else if(degree >= 360) {
        while((degree -= 360.0) >= 360.0) {}
    }
} 
PHP код:
new
    vehicleid = GetPlayerVehicleID(playerid);
if(vehicleid) { // check if player is in a vehicle
    new
        Float: angle,
        Float: offset;
    GetVehicleZAngle(vehicleid, angle); // get angle before the loop, no need to recall this function x times
    angle += 180.0; // adding offset before the loop
    for(new i; i < sizeof spdcamEnum; ++i) {
        offset = angle - spdcamEnum[i][scam_RZ];
        ValidateDegree(offset); // you need to validate the result otherwise it could be that spdcam is 355 and angle is 5.0 and it wouldn't trigger
            
        if(offset < 45.0 || offset > 315.0) {
            printf("Playerid %d got caught by speed cam!", playerid);
            break; // abort loop
        }
    } 


Re: Is player facing speed camera - Bigwebicek - 01.07.2017

Working, thanks.