[RayZek95]

Hi everyone, there's a way to set the origin of an entity to ground?

I tried this way of metalicross:

PHP Code:

stock GetUserEyePosition(iId, Float:vecReturn[3], Float:fNormalDist) // mia gordo mia :3
{
    static Float:vecStart[3], Float:vecEnd[3]
    entity_get_vector(iId, EV_VEC_origin, vecStart)
    entity_get_vector(iId, EV_VEC_view_ofs, vecEnd)
    
    xs_vec_add(vecStart, vecEnd, vecEnd) // vista de los ojos
    
    entity_get_vector(iId, EV_VEC_v_angle, vecEnd)
    engfunc(EngFunc_MakeVectors, vecEnd)
    get_global_vector(GL_v_forward, vecEnd)
    xs_vec_mul_scalar(vecEnd, 9999.9, vecEnd)
    
    xs_vec_add(vecStart, vecEnd, vecEnd) // vista a la mierda de los ojos
    
    engfunc(EngFunc_TraceLine, vecStart, vecEnd, DONT_IGNORE_MONSTERS, iId, 0)
    
    get_tr2(0, TR_vecPlaneNormal, vecEnd)
    xs_vec_mul_scalar(vecEnd, fNormalDist, vecEnd) // distancia de la normal de la superficie
    
    get_tr2(0, TR_vecEndPos, vecReturn)
    xs_vec_add(vecReturn, vecEnd, vecReturn)
} 


Works, but I want to restrict that for only aiming the ground; and in the case that is aiming the ground always set the origin in Z coordenate = 0 (in other words, "set to ground")

[EFFx]

https://www.amxmodx.org/api/engine/drop_to_floor

[RayZek95]

And without that? I need to know what I'm doing, the way using vectors like the stock I posted

[EFFx]

Doing more calculations to reach the same end result that a simple native call would do for you makes no sense, just follow the damn suggestion CJ.

[HamletEagle]

Originally Posted by RayZek95 And without that? I need to know what I'm doing, the way using vectors like the stock I posted

Read the notes to understand how the function works:

This engine function traces 256 units straight downwards from the entity origin. If the trace hits the floor, the origin is updated to the end position of the trace, FL_ONGROUND is added to the flags and EV_ENT_groundentity is updated. When the trace does not hit anything or the entity would be stuck inside something, the function does nothing and returns 0.

[McTavish]

Originally Posted by RayZek95 And without that? I need to know what I'm doing, the way using vectors like the stock I posted

I'm a noob at scripting but I can help I guess.

stock GetUserEyePosition(iId, Float:vecReturn[3], Float:fNormalDist)
{
    static Float:vecStart[3], Float:vecEnd[3]
    entity_get_vector(iId, EV_VEC_origin, vecStart)
    entity_get_vector(iId, EV_VEC_view_ofs, vecEnd)

    xs_vec_add(vecStart, vecEnd, vecEnd)

    entity_get_vector(iId, EV_VEC_v_angle, vecEnd)
    engfunc(EngFunc_MakeVectors, vecEnd)
    get_global_vector(GL_v_forward, vecEnd)
    xs_vec_mul_scalar(vecEnd, 9999.9, vecEnd)

    xs_vec_add(vecStart, vecEnd, vecEnd)

    engfunc(EngFunc_TraceLine, vecStart, vecEnd, DONT_IGNORE_MONSTERS, iId, 0)

    // Check if the trace hit the ground
    if(get_tr2(0, TR_iHitgroup) == HITGROUP_GENERIC && get_tr2(0, TR_flFraction) < 1.0)
    {
        // Check if the trace hit the floor 
        if(get_tr2(0, TR_iHitgroup) & CONTENTS_SOLID)
        {
            // Get the trace end position
            get_tr2(0, TR_vecEndPos, vecReturn)

            // Set the origin of the entity to the trace end position with Z = 0
            vecReturn[2] = 0.0
            entity_set_vector(iId, EV_VEC_origin, vecReturn)
        }
    }
}

This function works by first checking if the trace hit the ground using the get_tr2(0, TR_iHitgroup) function, and the fraction of the trace using the get_tr2(0, TR_flFraction) function. If the trace hit the ground and the fraction is less than 1, it will check if the trace hit the floor using the get_tr2(0, TR_iHitgroup) & CONTENTS_SOLID where the CONTENTS_SOLID macro is a flag that represents the floor or solid ground. If the trace hit the floor, it will set the origin of the entity to the trace end position with Z = 0 using the entity_set_vector(iId, EV_VEC_origin, vecReturn) function.

[RayZek95]

I get it... thank you all. And thanks McTravish

[shayan123]

Yes, there is a way to set the origin of an entity to the ground. One way to do this is by using the TraceLine function to trace a line from the entity's current origin to a point below it (for example, the origin minus the entity's view offset) and then using the TraceEndPos output to set the entity's origin to the point where the trace hit the ground. This method is similar to the one you provided, but you can use the TraceEndPos output to set the origin of the entity.

Another way to do this is using a plugin like 'groundme' which is a plugin that can be used to change the origin of an entity to the point where it is on the ground.

You can also use the built in function 'engfunc(EngFunc_SetOrigin, ent, origin_vector)' where ent is the index of the entity and origin_vector is the new origin for the entity. This will change the origin of an entity to the specific origin that you provide.

You can also use the built-in function 'engfunc(EngFunc_DropToFloor,ent)' where ent is the index of the entity. this will set the origin of the entity to the point where it is on the ground.