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nearest entity on screen???
#283755
08/09/09 21:09
08/09/09 21:09
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Joined: Mar 2008
Posts: 2,247
Baden Württemberg, Germany
Espér
OP
Expert
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OP
Expert
Joined: Mar 2008
Posts: 2,247
Baden Württemberg, Germany
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Hi there.. i´m wokring on a 2,5D Shooter.. And i worked hard to get movement and weapon changes to work. But now i stuck at a problem. The Rockets! What i need: A Script that Scans the Screen for all objects with a 5 in Skill99. From all this, it should notice the nearest to the player, and set his angle to look at that object ( so my rocket seeks it ). I hope really someone can help me here ( it´s the last weapon before i start mapping ). Edit: Some Ingame Screens of Weapons and Stuff ( click to enlarge ): 
Last edited by Espér; 08/09/09 21:18.
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Re: nearest entity on screen???
[Re: Espér]
#283787
08/10/09 06:02
08/10/09 06:02
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Joined: Feb 2009
Posts: 84
Deutschland/Niedersachsen
GorNaKosh
Junior Member
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Junior Member
Joined: Feb 2009
Posts: 84
Deutschland/Niedersachsen
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Also wenn du Entities für die Objekte benutzt, versuch sowas mal:
ENTITY* nextEnt;
void event_scan() {
if(event_type == EVENT_SCAN && my.skill[5] == 5) {
if(nextEnt == NULL || vec_dist(me.x,you.x) < vec_dist(nextEnt.x,you.x)) {
nextEnt = me;
}
}
}
action object() {
my.emask |= ENABLE_SCAN;
my.event = event_scan;
}
Wenn du deine eigenen Structs hast, könntest du die Pointer aller sichtbaren Objekte in einer Liste verwalten und diese bei jedem mal durchlaufen wenn gescannt werden soll. Für jedes Objekt muss dann wieder die Entfernung - ähnlich wie oben - gecheckt werden... Hoffe ich hab die Frage richtig verstanden und konnte helfen 
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Re: nearest entity on screen???
[Re: Espér]
#283883
08/10/09 15:26
08/10/09 15:26
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Joined: Jul 2007
Posts: 959
nl
flits
User
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User
Joined: Jul 2007
Posts: 959
nl
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didnt test the code and need some change but its just for the idea
var dist;
ENTITY* close_ent;
dist = 0;
you = ent_next(NULL); // retrieve first entity
while (you) // repeat until there are no more entities
{
if(Skill99 == 5 )
{
if(vec_dist(player.x,you.x) == dist)
{
dist = vec_dist(player.x,you.x);
close_ent = you;
}
}
you = ent_next(you); // get next entity
}
vec_set(temp,close_ent.x);
vec_sub(temp,weapon.x);
vec_to_angle(weapon.pan,temp);
"empty"
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Re: nearest entity on screen???
[Re: flits]
#283895
08/10/09 16:08
08/10/09 16:08
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Joined: Jun 2006
Posts: 2,640
Earth
Germanunkol
Expert
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Expert
Joined: Jun 2006
Posts: 2,640
Earth
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== dist won't work, dist won't ever be 0...
var dist;
ENTITY* close_ent;
dist = 100000; //maximum dist that the rocket can 'see' entities at
you = ent_next(NULL); // retrieve first entity
while (you) // repeat until there are no more entities
{
if(Skill99 == 5 )
{
if(vec_dist(player.x,you.x) < dist)
{
dist = vec_dist(player.x,you.x);
close_ent = you;
}
}
you = ent_next(you); // get next entity
}
vec_set(temp,close_ent.x);
vec_sub(temp,weapon.x);
vec_to_angle(weapon.pan,temp);
~"I never let school interfere with my education"~
-Mark Twain
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Re: nearest entity on screen???
[Re: Germanunkol]
#284134
08/11/09 21:13
08/11/09 21:13
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Joined: Mar 2008
Posts: 2,247
Baden Württemberg, Germany
Espér
OP
Expert
|
OP
Expert
Joined: Mar 2008
Posts: 2,247
Baden Württemberg, Germany
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ok.. a problem appeared..: this is the rocket code:
action i_rocket()
{
var dist;
var dist2 = 100;
var destroyme = 0;
my.skill2 = 0;
my.skill1 = reedeem2;
if(reedeem2 == 1){reedeem2 = 2;}
else{reedeem2 = 1;}
ENTITY* close_ent;
VECTOR* temp;
set(my, PASSABLE);
while(my.skill2 < 50)
{
if(my.skill1 == 1)
{
c_move(my, vector(0,-40*time_step,0), nullvector, NULL);
my.pan += 4*time_step;
}
if(my.skill1 == 2)
{
c_move(my, vector(0,-40*time_step,0), nullvector, NULL);
my.pan -= 4*time_step;
}
rocketeer();
my.skill2 += 1;
wait(1);
}
dist = 100000; //maximum dist that the rocket can 'see' entities at
while(dist2 > 30 && my.x > -1600 && my.x < 1600 && my.y > -500 && my.y < 5000)
{
you = ent_next(NULL); // retrieve first entity
while(you) // repeat until there are no more entities
{
if(you.skill99 >= 5)
{
if(vec_dist(my.x,you.x) < dist)
{
dist = vec_dist(my.x,you.x);
dist2 = vec_dist(my.x,you.x);
close_ent = you;
}
}
you = ent_next(you); // get next entity
wait(1);
}
// if(close_ent != NULL)
// {
while(dist2 > 30 && my.x > -1600 && my.x < 1600 && my.y > -500 && my.y < 5000)
{
error("1")
dist2 = vec_dist(my.x, close_ent.x);
error("1")
vec_set(temp, close_ent.x);
error("2")
vec_sub(temp, my.x);
error("3")
vec_to_angle(my.pan, temp);
error("4")
c_move(my, vector(50*time_step,0,0), nullvector, NULL);
error("5")
rocketeer();
error("6")
my.z = 0;
error("7")
wait(1);
}
// }
wait(1);
}
// exploding_1(my);
wait(1);
ent_remove(my);
}
The problem: The rocket appears... makes it´s startin curve-flight and is away.. from one frame to another... Odd: the player moves now only diagonal ( lower_left to upper_right and reverse.. nothing else ). And the next rockets are flying down out of the screen, when an error "Crash in i_rocket" appears... like you see, i´ve written some errors with numbers.. After Error "1", but BEFORE Error "2", i got an "Empty ointer in i_rocket" Any idea what could be wrong????
Last edited by Espér; 08/12/09 06:08.
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Re: nearest entity on screen???
[Re: Espér]
#284210
08/12/09 08:09
08/12/09 08:09
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Joined: Jul 2007
Posts: 959
nl
flits
User
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User
Joined: Jul 2007
Posts: 959
nl
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i gues the pointer is destroyed by your rocket ore somthing else
if(close_ent != NULL)
// {
while(dist2 > 30 && my.x > -1600 && my.x < 1600 && my.y > -500 && my.y < 5000 && close_ent != NULL)
{
error("1")
dist2 = vec_dist(my.x, close_ent.x);
error("1")
vec_set(temp, close_ent.x);
error("2")
vec_sub(temp, my.x);
error("3")
vec_to_angle(my.pan, temp);
error("4")
c_move(my, vector(50*time_step,0,0), nullvector, NULL);
error("5")
rocketeer();
error("6")
my.z = 0;
error("7")
wait(1);
}
// }
"empty"
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Re: nearest entity on screen???
[Re: Espér]
#284223
08/12/09 09:30
08/12/09 09:30
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Joined: Jul 2007
Posts: 959
nl
flits
User
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User
Joined: Jul 2007
Posts: 959
nl
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dont know if this is the problem but you dont got the ";" afer the error("1")
and not importend but you wont need the wait(1); in this loop
you = ent_next(NULL); // retrieve first entity
while(you) // repeat until there are no more entities
{
...
// wait(1);
}
"empty"
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