[madeitout]

I have an entitiy that I want to fly and hit an exact origin. I have a function that will do it but the function doesn't account for gravity and assumes the entities movetype is fly but I need it to calculate the velocities with gravity included.

here is the function

PHP Code:

stock send_to_origin(ent, target_origin[3], Float:speed)
{
    if (!pev_valid(ent))
        return 0;

    new Float:entity_origin[3];
    pev(ent, pev_origin, entity_origin);

    new Float:diff[3];
    diff[0] = target_origin[0] - entity_origin[0];
    diff[1] = target_origin[1] - entity_origin[1];
    diff[2] = target_origin[2] - entity_origin[2];

    new Float:length = floatsqroot(floatpower(diff[0], 2.0) + floatpower(diff[1], 2.0) + floatpower(diff[2], 2.0));

    new Float:velocity[3];
    velocity[0] = diff[0] * (speed / length);
    velocity[1] = diff[1] * (speed / length);
    velocity[2] = diff[2] * (speed / length);
    set_pev(ent, pev_velocity, velocity);

    return 1;
} 


any help is appreciated, thank you

[xbatista]

Show us your code where you creating entity ?

[madeitout]

oh sorry here you are

PHP Code:

public make_nade(id)
{
    new Float:angles[3], Float:origin[3], ent = engfunc(EngFunc_CreateNamedEntity, engfunc(EngFunc_AllocString, "info_target"));
    if (pev_valid(ent) && is_user_alive(id))
    {
        set_pev(ent, pev_classname, "grenade");
        set_pev(ent, pev_owner, id);
        set_pev(ent, pev_solid, 2);
        set_pev(ent, pev_movetype, 6);
        set_pev(ent, pev_gravity, 1.0);
        engfunc(EngFunc_SetModel, ent, "models/grenade.mdl");
        engfunc(EngFunc_SetSize, ent, Float:{-6.0, -6.0, -6.0}, Float:{6.0, 6.0, 6.0});

        pev(id, pev_v_angle, angles);
        set_pev(ent, pev_angles, angles);
        pev(id, pev_origin, origin);
        engfunc(EngFunc_SetOrigin, ent, origin);

        return ent;
    }
    return 0;
} 


[xbatista]

Take a look of my rpg code :

PHP Code:

// RPG Launcher Stuff
public act_launch(id)
{    
    new rocket_ent = create_entity("info_target");
    
    if (!pev_valid(rocket_ent) || !is_user_alive(id) )
        return;
    
    set_pev(rocket_ent ,pev_classname, "RPG")
    engfunc(EngFunc_SetModel, rocket_ent, g_w_rpg)
    
    set_pev( rocket_ent, pev_owner, id)
    set_pev( rocket_ent, pev_movetype, MOVETYPE_FLY)
    set_pev( rocket_ent, pev_solid, SOLID_BBOX)
    
    set_pev( rocket_ent, pev_mins, Float:{-1.0,-1.0,-1.0})
    set_pev( rocket_ent, pev_maxs, Float:{1.0,1.0,1.0})
    
    new Float:fAim[3],Float:fAngles[3],Float:fOrigin[3]
    
    pev(id,pev_origin,fOrigin)
    velocity_by_aim(id,64,fAim)
    vector_to_angle(fAim,fAngles)

    
    fOrigin[0] += fAim[0]
    fOrigin[1] += fAim[1]
    fOrigin[2] += fAim[2]
    
    set_pev(rocket_ent,pev_origin,fOrigin)
    set_pev(rocket_ent,pev_angles,fAngles)
    
    new Float:fVel[3]
    velocity_by_aim(id, 1500,fVel)    
    set_pev(rocket_ent,pev_velocity,fVel)
} 


Sorry I'm little lazy now to explain, must go

[madeitout]

thanks man but that code basically does the exact thing as what the stock that i have does. Both of our codes only calculate a velocity that will hit the target if the entity has no gravity (MOVETYPE_FLY).

im not very good at angle math and such so what i need is someone math wiz to edit my formula so it accounts for gravity because my ent is MOVETYPE_TOSS, thanks thou

[xbatista]

You mean throw entity like a grenade (gravity) ?

[madeitout]

yea the rpg you made has the movetype set to fly so it has no gravity and will just float so it you set its velocity to like 1 it will just slowly float ahead until its hits something, but the grenade that i made has a movetype of toss which means it has gravity. If you set its velocity to 1 its will move forward and then gravity will pull it to the ground like a normal nade.

If I use either of our formulas on my grenade it will start off towards the target origin but the gravity will grab it and pull it down before it gets to the target

[Alka]

Creating a ent with movetype MOVETYPE_TOSS and setting pev_gravity should do the job.

Originally Posted by madeitout If I use either of our formulas on my grenade it will start off towards the target origin but the gravity will grab it and pull it down before it gets to the target

Set the gravity to a lower value...

[xbatista]

PHP Code:

    set_pev(ent, pev_gravity, 1.3);
    set_pev(ent, pev_friction, 1.0); 


[madeitout]

thanks guys but my ent is already set to toss and in order to get the entity to hit the exact origin by moding the gravity, I would need to find the exact gravity for my ent which im unsure how to calc and it would also make the ent appear slower and float more ingame. I perfer to just modify my formula so the ent gets more velocity from the start and will hit the target. Ill wait a day or two and then I might need to go to a math forum and see if they can make me a forumla that will do it more me.