12 replies to this topic

[AlexTM]

Hi. I've sucessfully made an Auto aim system for a top down game. However, the auto-aim object only sticks to the pedestrian that I'm aiming at. Which is good but I want to add something else.

How can I make it so if i move the mouse a little, the aim object will still stick to the pedestrian but move slightly so that I can shoot other parts of the body?

Like it sticks to the pedestrian but I can only move it like 32 steps away from the pedestrian.
How do i do this?

Information on the OBJ_MOUSE object:

Spoiler

Information about object: OBJ_MOUSE

Sprite: SPR_MOUSE
Solid: false
Visible: true
Depth: -500
Persistent: false
Parent: <no parent>
Mask: <same as sprite>

Create Event:
execute code:

image_index=0
image_speed=0
image_scale = 1

Alarm Event for alarm 0:
execute code:

if mouse_check_button(mb_left)
{
image_scale += 0.002;
alarm[0] = 1};


 Step Event:
execute code:

if not position_meeting(x,y,obj_peds)
{image_index=0
 image_speed=0}
 
if not position_meeting(x,y,obj_save)
{image_index=0
 image_speed=0}
 
if not position_meeting(x,y,obj_blood)
{image_index=0
 image_speed=0}
 
image_xscale = image_scale+1;
image_yscale = image_scale+1

if image_scale>1.5
{image_scale = 1.5}


if global.auto_aim=0
{x=mouse_x
y=mouse_y}


Collision Event with object obj_blood:
execute code:

image_index=13


Mouse Event for Glob Left Button:
execute code:

image_scale += 0.002;
alarm[0] = 1


Mouse Event for Glob Left Released:
execute code:

image_scale=1


Draw Event:
execute code:

draw_sprite_ext(SPR_MOUSE,image_index,x,y,image_scale,image_scale,direction,c_white,1);

Edited by A!ex, 30 May 2012 - 05:06 PM.

[Jack Indie Box]

you need to upload your current one as we will be coding blind and most likely break your current one or just not get it to work

[AlexTM]

Spoiler

Information about object: OBJ_MOUSE

Sprite: SPR_MOUSE
Solid: false
Visible: true
Depth: -500
Persistent: false
Parent: <no parent>
Mask: <same as sprite>

Create Event:
execute code:

image_index=0
image_speed=0
image_scale = 1

Alarm Event for alarm 0:
execute code:

if mouse_check_button(mb_left)
{
image_scale += 0.002;
alarm[0] = 1};


 Step Event:
execute code:

if not position_meeting(x,y,obj_peds)
{image_index=0
 image_speed=0}
 
if not position_meeting(x,y,obj_save)
{image_index=0
 image_speed=0}
 
if not position_meeting(x,y,obj_blood)
{image_index=0
 image_speed=0}
 
image_xscale = image_scale+1;
image_yscale = image_scale+1

if image_scale>1.5
{image_scale = 1.5}


if global.auto_aim=0
{x=mouse_x
y=mouse_y}


Collision Event with object obj_blood:
execute code:

image_index=13


Mouse Event for Glob Left Button:
execute code:

image_scale += 0.002;
alarm[0] = 1


Mouse Event for Glob Left Released:
execute code:

image_scale=1


Draw Event:
execute code:

draw_sprite_ext(SPR_MOUSE,image_index,x,y,image_scale,image_scale,direction,c_white,1);

[Jack Indie Box]

i dont see any auto amining there i may be blind. plz explain it or wait for someone else to spot it and help you

[AlexTM]

i dont see any auto amining there i may be blind. plz explain it or wait for someone else to spot it and help you

yeayea I realised that 10 minutes ago. The auto-aiming code is in the characters right mouse button event.
This is the code:

with(OBJ_MOUSE) {if obj_player.weapon_equip!=4 and distance_to_object(obj_player)<=300
{x=instance_nearest(x,y,obj_peds).x
y=instance_nearest(x,y,obj_peds).y
global.auto_aim=1}}

with(OBJ_MOUSE) 
{if distance_to_object(obj_player)>300
{global.auto_aim=0}}

if weapon_equip=4
{view_object[view_current]=OBJ_MOUSE}

[Jack Indie Box]

ok just add

a check for mouse position if its currently over a body part(if your locking on to body parts) else just let the mouse freely target within the object(ie locks on, but if mouse is within the sprite target that spot).
im tired atm so if you cant work out how to do it, please work out exactly how you want it to work and maybe a picture and ill give you a hand.

[icuurd12b42]

I think your code should be in the mouse object...

Asuming you currently have
x = mouse_x;
y = mouse_y;

this should snap to a obj_ped

//follow mouse
x = mouse_x;
y = mouse_y;
//stop here, if auto-aim is off
if(global.auto_aim==0) exit;

//snap to ped? find a ped
var ins;
ins = instance_nearest(x, y, obj_peds)
if (ins != noone)
{
    //distance to ped
    var d;
    d = point_distance(ins.x, ins.y, x, y);
    //within snap 300 is way to big but I have no idea for you game. I would use the ped radius
    var maxd;
    maxd = 300;
    //maxd = point_distance(ins.bbox_left, ins.bbox_top, ins.bbox_right, ins.bbox_bottom) / 2;
    //snap on ped, but not right on it. On ped within the snap radius
    if (d <= maxd)
    {
        var a;
        a = point_direction(ins.x, ins.y, x, y);
        x = ins.x + lengthdir_x(median(0, maxd, d), a);
        y = ins.y + lengthdir_y(median(0, maxd, d), a);
    }
}

[edit] fixed up point_distance and point_direction

[AlexTM]

That didn't work

[icuurd12b42]

That didn't work

It would help to be more specific

[AlexTM]

Doesn't even aim to anything. Just follows the mouse completely.

[icuurd12b42]

Maybe you did not change maxd like said... the commented out maxd

[AlexTM]

Maybe you did not change maxd like said... the commented out maxd

ye I changed maxd to 48

[Jack Indie Box]

im pretty sure its this bit

//follow mouse
x = mouse_x;
y = mouse_y;

and 
if (d <= maxd)

not doing all situations you want. you want if the mouse is no where near the object that it follows mouse(or disapears?) if its withing a certain distance it locks on, if it is within the sprite it manually aims a little.

you need another bit then

//follow mouse
xx = mouse_x;
yy = mouse_y;
//stop here, if auto-aim is off
if(global.auto_aim==0) 
{
x=xx;
y=yy;
exit;
}

//snap to ped? find a ped
var ins;
ins = instance_nearest(xx,yy, obj_peds)
if (ins != noone)
{
    //distance to ped
    var d;
    d = point_distance(ins.x, ins.y, xx, yy);
    //within snap 300 is way to big but I have no idea for you game. I would use the ped radius
    var maxd;
    maxd = 48;
    //maxd = point_distance(ins.bbox_left, ins.bbox_top, ins.bbox_right, ins.bbox_bottom) / 2;
    //snap on ped, but not right on it. On ped within the snap radius
    if (d <= maxd*2)
    {
        var a;
        a = point_direction(ins.x, ins.y, xx, yy);
        x = ins.x + lengthdir_x(median(0, maxd, d), a);
        y = ins.y + lengthdir_y(median(0, maxd, d), a);
    }
}

i think that will do what you want? if i understood the code(i dont have access to GM atm to test). i made it so the aim obj only follows the mouse directly if its within the sprite OR outside the range for auto aim(i put 2*mxd, as i think maxd is the sprite size? or half, so i thought youd want the mouse to lock on outside of the sprite). i think thats it... else his code needs to be changed