[GsiX]

Can anyone be so kind write me a simple code from the pic above.
I want to rotate from RED to BLUE without taking the long blue path,
instead i want to rotate thru the YELLOW path let say 45 degree to 340 degree the shorter way.

I cant explain this in better english so it like if the the yellow path is shorter than the blue path then go thru the zero degree?
Because subtract this number always give full rotation regardless since the number reset at 360.

Here some love and hug for appreciation of your time ===>>>

this backup attachment is the same as pic above

[GsiX]

Here is my humble code, it works but if i stand at zero PHD degree or close to zero to the object, it choose to rotate full blasst PHD degree.

Here some more love and hug ===>>>

PHP Code:

void Think_Direction( int entity, float pos_entity[3], float pos_owner[3] )
{
    float pos_buff[3];
    pos_buff[0] = pos_owner[0];
    pos_buff[1] = pos_owner[1];
    pos_buff[2] = pos_entity[2];    // we set the pos at same height to please my imagination, noting more.
    //SetArray3DFloat( pos_owner[0], pos_owner[1], pos_entity[2], pos_buff );
    
    float ang_entity[3];
    float ang_guide[3];
    GetEntAngle( entity, ang_entity, 0.0, 0 );    // get the object current world angle
    MakeVectorFromPoints( pos_entity, pos_buff, ang_guide );
    NormalizeVector( ang_guide, ang_guide );
    GetVectorAngles( ang_guide, ang_guide );    // get the world angle between the object and me
    
    float tolerance = 2.0; // we allow this much of angle over shoot/error
    float direction = ang_guide[1] - ang_entity[1];
    if( direction > (tolerance * -1.0 ) && direction < tolerance )    // dont compare with zero value to rest as we might not catch the exact number
    {
        direction = 0.0;    // tell the object to rest/stop rotate as it reach the nose facing me.
    }
    
    // negative value turn right/cw
    // positive value turn left/ccw
    float force = FORCE_ROTATE * direction;
    
    if( g_fForceDirection[entity] != force )
    {
        g_fForceDirection[entity] = force;
        SetThrusterTorque( g_iPetTroque[entity], force ); // whatever value we get, set it to the rotation force
        if( g_fForceDirection[entity] == FORCE_NONE && g_fForceForward[entity] == FORCE_NONE )
        {
            EmitSoundToAll( SND_TIMEOUT, entity, SNDCHAN_AUTO );
        }
    }
} 


[GsiX]

Found this by Kyle and it work like a charm.
It always give you shorter direction to rotate either negative or positive from 0' to 180' ( cw or ccw);

Solution 1 as follow:

PHP Code:

function AngleDifference( angle1, angle2 )
{
    let diff = ( Math.ceil(angle2 - angle1) + 180 ) % 360 - 180;
    return ( diff < -180 ? diff + 360 : diff );
} 


solution 2:

Spoiler

Check the last spoiler.

solution 3:

Spoiler

I said check the last spoiler.

solution 4:

Spoiler

If you insist....

PHP Code:

public static double AngleDifference( double angle1, double angle2 )
{
    double diff = ( angle2 - angle1 + 180 ) % 360 - 180;
    return diff < -180 ? diff + 360 : diff;
} 


last spoiler:

Spoiler

The code you are looking for... enjoy..

PHP Code:

float AngleDifference( float angle1, float angle2 )
{
    int diff = ( RoundToCeil(angle2 - angle1) + 180 ) % 360 - 180;
    return float( diff < -180 ? diff + 360 : diff );
}