[Solved] How do you make one entity rotate at a certain speed toward another?

LiZou Mapper · **Author**

Hello !
This is method how I use to make the NPC rotate towards the enemy, but it's boring and bad.

PHP Code:


			
pev(ent, pev_origin, vOrigin)

pev(victim, pev_origin, vVicOrigin)



xs_vec_sub(vVicOrigin, vOrigin, vVector)



// Convert vector to angles.

vector_to_angle(vVector, vAngles)



vAngles[0] = 0.0

vAngles[2] = 0.0

    

pev(ent, pev_angles, vAngles)

I tried to make this entity rotate but at a certain speed towards some entity like NPCs in Half-Life.It rotates from the near direction of the enemy, for example, if the enemy is on the right side of an entity, the entity will rotate towards the right direction.

Thanks in advance

MrPickles · *Last edited by MrPickles; 10-13-2022 at 20:52.*

Quote:

Originally Posted by LiZou Mapper

Hello !
This is method how I use to make the NPC rotate towards the enemy, but it's boring and bad.

PHP Code:


			
pev(ent, pev_origin, vOrigin)
pev(victim, pev_origin, vVicOrigin)

xs_vec_sub(vVicOrigin, vOrigin, vVector)

// Convert vector to angles.
vector_to_angle(vVector, vAngles)

vAngles[0] = 0.0
vAngles[2] = 0.0
    
pev(ent, pev_angles, vAngles)

I tried to make this entity rotate but at a certain speed towards some entity like NPCs in Half-Life.It rotates from the near direction of the enemy, for example, if the enemy is on the right side of an entity, the entity will rotate towards the right direction.

Thanks in advance

PHP Code:


			

public setAIMtoORIGIN( Client, Target )
{
       static Float:__fl_POrigin[3], Float:__fl_TOrigin[3];

       entity_get_vector( Client, 0, __fl_POrigin );
       entity_get_vector( Target, 0, __fl_TOrigin );

       __fl_TOrigin[0] -= __fl_POrigin[0];
       __fl_TOrigin[1] -= __fl_POrigin[1];
       __fl_TOrigin[2] -= __fl_POrigin[2];

       static Float:__fl_Lenght;
       __fl_Lenght = vector_length( __fl_TOrigin )

       static Float:__fl_Aim[3];
       __fl_Aim[0] = __fl_TOrigin[0] / __fl_Lenght;
       __fl_Aim[1] = __fl_TOrigin[1] / __fl_Lenght;
       __fl_Aim[2] = __fl_TOrigin[2] / __fl_Lenght;

       vector_to_angle( __fl_Aim, __fl_Aim );

       __fl_Aim[0] *= -1;

       switch(__fl_Aim[1])
       {
              case 180, -180:
              {
                     __fl_Aim[1]=-179.999999
              } 
              default:
              {
                     if(__fl_Aim[1]>180.0) 
                     {
                           __fl_Aim[1] -= 360
                     }
                     else if(__fl_Aim[1]<-180.0) 
                     {
                           __fl_Aim[1] += 360
                     }
              }
       }

       entity_set_vector( Client, EV_VEC_angles, __fl_Aim );
       entity_set_int( Client, EV_INT_fixangle, 1 );
}

LiZou Mapper · *Last edited by LiZou Mapper; 10-13-2022 at 21:56. Reason: Edit on code!!*

client?
Maybe, you don't understand what I mean, you know when an NPC is idle after stopping a player behind it, slowly rotate towards player !

Maybe, you will understand now?

PHP Code:


			
public fw_NPC_Think(ent)
{
    // Invalid entity?
    if (!pev_valid(ent))
        return

    // ...

    static Float:vVicOrigin[3], Float:vAngles[3], victim

    victim = pev(ent, pev_enemy)

    // Get origin of enemy.
    pev(victim, pev_origin, vVicOrigin)

    // Get angles of the NPC.
    pev(ent, pev_angles, vAngles)

    vAngles[1] += 1.0

    // Set NPC new angles.
    set_pev(ent, pev_angles, vAngles)

    // Check victim in view cone?
    if (is_in_viewcone(ent, vVicOrigin))
    {
        // Make the NPC attack the enemy...

        // Think after the attack
        set_pev(ent, pev_nextthink, get_gametime() + 3.0)
        return
    }

    // ...

    // Think again!
    set_pev(ent, pev_nextthink, get_gametime() + 0.1)
}

I'm sorry, do not know how to explain it to you?

MrPickles · *Last edited by MrPickles; 10-13-2022 at 22:57.*

Quote:

Originally Posted by LiZou Mapper

client?
Maybe, you don't understand what I mean, you know when an NPC is idle after stopping a player behind it, slowly rotate towards player !

Maybe, you will understand now?

PHP Code:


			
public fw_NPC_Think(ent)
{
    // Invalid entity?
    if (!pev_valid(ent))
        return

    // ...

    static Float:vVicOrigin[3], Float:vAngles[3], victim

    victim = pev(ent, pev_enemy)

    // Get origin of enemy.
    pev(victim, pev_origin, vVicOrigin)

    // Get angles of the NPC.
    pev(ent, pev_angles, vAngles)

    vAngles[1] += 1.0

    // Set NPC new angles.
    set_pev(ent, pev_angles, vAngles)

    // Check victim in view cone?
    if (is_in_viewcone(__int_Entity, vVicOrigin))
    {
        // Make the NPC attack the enemy...

        // Think after the attack
        set_pev(ent, pev_nextthink, get_gametime() + 3.0)
        return
    }

    // ...

    // Think again!
    set_pev(ent, pev_nextthink, get_gametime() + 0.1)
}

I'm sorry, do not know how to explain it to you?

PHP Code:


			
public fw_NPC_Think(__int_Entity)
{
    if (!_is_valid_ent(__int_Entity))
        return

    static __int_Victim;
    __int_Victim = entity_get_edict( __int_Entity, EV_ENT_enemy );

    static Float:__fl_Angles[3], Float:__fl_AnglesEnd[3], Float:__fl_VictimOrg[3];

    entity_get_vector( __int_Victim, 0, __fl_VictimOrg );

    setAIMtoORIGIN( __int_Entity, __fl_VictimOrg, __fl_AnglesEnd );
    entity_get_vector( __int_Entity, 6, __flAngles );

    __fl_Angles[0] += __fl_AnglesEnd[0] - 5.0;
    __fl_Angles[1] += __fl_AnglesEnd[1] - 5.0;
    __fl_Angles[2] += __fl_AnglesEnd[2] - 5.0;

    entity_set_vector( __int_Entity, 6, __fl_Angles );
    entity_set_int( __int_Entity, EV_INT_fixangle, 1 );


    if (is_in_viewcone(ent, __fl_VictimOrg))
    {
        // Make the NPC attack the enemy...

        // Think after the attack
        set_pev(ent, pev_nextthink, get_gametime() + 3.0)
        return
    }

    // ...

    // Think again!
    set_pev(ent, pev_nextthink, get_gametime() + 0.1)
} 
public setAIMtoORIGIN( Client, Float:__fl_TOrigin[3], Float:__fl_Aim[3] )
{
       static Float:__fl_POrigin[3];

       entity_get_vector( Client, 0, __fl_POrigin );

       __fl_TOrigin[0] -= __fl_POrigin[0];
       __fl_TOrigin[1] -= __fl_POrigin[1];
       __fl_TOrigin[2] -= __fl_POrigin[2];

       static Float:__fl_Lenght;
       __fl_Lenght = vector_length( __fl_TOrigin )

       static Float:__fl_Aim[3];
       __fl_Aim[0] = __fl_TOrigin[0] / __fl_Lenght;
       __fl_Aim[1] = __fl_TOrigin[1] / __fl_Lenght;
       __fl_Aim[2] = __fl_TOrigin[2] / __fl_Lenght;

       vector_to_angle( __fl_Aim, __fl_Aim );

       __fl_Aim[0] *= -1;

       switch(__fl_Aim[1])
       {
              case 180, -180:
              {
                     __fl_Aim[1]=-179.999999
              } 
              default:
              {
                     if(__fl_Aim[1]>180.0) 
                     {
                           __fl_Aim[1] -= 360
                     }
                     else if(__fl_Aim[1]<-180.0) 
                     {
                           __fl_Aim[1] += 360
                     }
              }
       }
}

try with this, it doesnt care if in the stock client is entity or id, when u put it in the think, change it to your index, see if works

MrPickles · *Last edited by MrPickles; 10-13-2022 at 22:56.*

*Delete This*

LiZou Mapper

Solved!
Thank you MrPickles !!