2 replies to this topic

[mastermarty]

As my first introduction to 3D in gamemaker I treid to recreate this tutorial: http://sandbox.yoyog.../make/tutorials , and then this tutorial: Tutorial: A First Person Shooter (zip file, 2.4 MB).
While the tutorial did work for a while, I ran into some problems in the "create an enemy" part of the tutorial.
You see, the enemy's are invisible. while this ups the tension a good bit, but it doesn't quite work.

The first thing you see will be a basic menu. just click the first button to go to the room wich actually works. You'll see an incredibly ugly room with a minigun in it. after a little while you'll here the ow sound, wich means that the monsters work. they also die like they should, but they just stay invisible.

I already asked a person who's quite experienced with gamemaker, but he can't find the problem.
I'll just post the gamemaker information here, since that's the quickest.

I used the standard files, sounds, scripts and sound from the tutorial but it just refuses to work.
If there're any questions, please ask.

player object:

Information about object: obj

Sprite: Sprite_player
Solid: false
Visible: true
Depth: 0
Persistent: false
Parent: <no parent>
Mask: <same as sprite>

Create Event:
execute code:

zdir = 0

display_mouse_set(display_get_width()/2,display_get_height()/2)

globalvar camx,camy,camcos,camsin;
direction = 0;
friction = 0.2;
pitch = 0;
playerheight = 12
playerspeed = 2

camx = x; camsin = sin(direction*pi/180);
camy = y; camcos = cos(direction*pi/180);

d3d_start();
d3d_set_hidden(false);
d3d_set_lighting(false);
d3d_set_culling(false);
d3d_set_fog(true,c_black,10,300);
texture_set_interpolation(true);







 Step Event:
execute code:

if keyboard_check(ord('W')){x += playerspeed*camcos;y -= playerspeed*camsin;}
if keyboard_check(ord('S')){x -= playerspeed*camcos;y += playerspeed*camsin;}
if keyboard_check(ord('A')){x += playerspeed*(cos((direction+90)*pi/180));y -= playerspeed*(sin((direction+90)*pi/180));}
if keyboard_check(ord('D')){x += playerspeed*(cos((direction-90)*pi/180));y -= playerspeed*(sin((direction-90)*pi/180));}

if keyboard_check(vk_shift) then {playerheight = 4} else {playerheight = 12}


End Step Event:
execute code:

{
camx = x;
camy = y;
camsin = sin(direction*pi/180);
camcos = cos(direction*pi/180);
playerspeed = playerheight/6

direction -= (display_mouse_get_x()-(display_get_width()/2))/4;
pitch -= (display_mouse_get_y()-(display_get_height()/2))/4;
display_mouse_set(display_get_width()/2,display_get_height()/2);

if pitch > 89 then pitch = 89;
if pitch < -89 then pitch = -89;
}



Collision Event with object object_wall_basic_hor:
execute code:

if keyboard_check(ord('W')){y += playerspeed*camsin;}
if keyboard_check(ord('S')){y -= playerspeed*camsin;}
if keyboard_check(ord('A')){y += playerspeed*(sin((direction+90)*pi/180));}
if keyboard_check(ord('D')){y += playerspeed*(sin((direction-90)*pi/180));}


Collision Event with object object_wall_basic_ver:
execute code:

if keyboard_check(ord('W')){x -= playerspeed*camcos;}
if keyboard_check(ord('S')){x += playerspeed*camcos;}
if keyboard_check(ord('A')){x -= playerspeed*(cos((direction+90)*pi/180));}
if keyboard_check(ord('D')){x -= playerspeed*(cos((direction-90)*pi/180));}


Draw Event:
execute code:

// set the projection 
d3d_set_projection(x,y,playerheight, x+camcos,y-camsin,playerheight+tan(degtorad(pitch)),0,0,1);
draw_set_alpha(1);
draw_set_color(c_white);

d3d_draw_floor(0,0,0,640,480,0, background_get_texture(texture_floor),24,18);
d3d_draw_floor(0,0,48,640,480,48, background_get_texture(texture_floor),16,12);

the enemy himself:

Information about object: obj_monster1

Sprite: spr_monster
Solid: false
Visible: true
Depth: -10
Persistent: false
Parent: obj_monster_basic
Mask: <same as sprite>

Create Event:
set variable image_speed to 0.3
set variable image_index to floor(random(4))

Destroy Event:
execute code:

{
  instance_create(x,y,obj_monster1_dead);
}


Begin Step Event:
execute code:

{
  if (point_distance(x,y,global.camx,global.camy) > 200) 
    { speed = 0; exit; }
  if (collision_line(x,y,global.camx,global.camy,obj_parent_wall,false,false))
    { speed = 0; exit; }  
  if (point_distance(x,y,global.camx,global.camy) < 12) 
  { 
    speed = 0; health -= 2; 
    if not sound_isplaying(snd_ow) sound_play(snd_ow);
    exit; 
  }
  move_towards_point(global.camx,global.camy,1.4);
}


Draw Event:
execute code:

{

  var tex;
  tex = sprite_get_texture(tex_monster,image_index);
  d3d_draw_wall(x-8*global.camsin,y-8*global.camcos,19,
                x+8*global.camsin,y+8*global.camcos,3,tex,1,1);
}

I don't really know wich files you need to see, so please say it if this is insufficient.

Edited by mastermarty, 12 February 2012 - 10:42 AM.

[troido]

you didn't define global.camsin.
in the step even of obj you define the local variables camsin, but that's not the same as global.camsin.
you should change camsin obj into global.camsin
alternatively, you can change global.camsin in the monster into obj.camsin, but i recomment the first choise.
this also applies to camcos, camx and camy.

Edited by troido, 12 February 2012 - 07:36 PM.

[mastermarty]

you didn't define global.camsin.
in the step even of obj you define the local variables camsin, but that's not the same as global.camsin.
you should change camsin obj into global.camsin
alternatively, you can change global.camsin in the monster into obj.camsin, but i recomment the first choise.
this also applies to camcos, camx and camy.

And it worked like a charm! that such a small mistake can give you such a headache....
Thanks alot!