another bullet question

another bullet question

neil dwyer

Member #7,237

May 2006

There is no bullet, why?

1#include <allegro.h>
2#include <stdlib.h>
3#include <math.h>
4#include <iostream.h>
5 
6#define player_speed 1
7#define bullet_speed 2
8 
9 
10float player1_x = 320;
11float player1_y = 240;
12float player2_x;
13float player2_y;
14float player1_rotate;
15float player2_rotate;
16float bullet_x;
17float bullet_y;
18int mickeyx;
19int mickeyy;
20int RED = makecol(255,0,0);
21 
22BITMAP *player1;
23BITMAP *player2;
24BITMAP *buffer;
25 
26void bullet_move()
27{
28bullet_x += bullet_speed * fixtof(fcos(ftofix(player1_rotate)));
29bullet_y += bullet_speed * fixtof(fsin(ftofix(player1_rotate))); 
30if(key[KEY_SPACE])
31{
32bullet_x = player1_x;
33bullet_y = player1_y; 
34putpixel(buffer,bullet_x, bullet_y,RED);
35}
36}
37 
38void player1_movement()
39{
40  if(key[KEY_A] && player1_x > 0)
41  {
42    player1_x -= player_speed;
43  }
44  if(key[KEY_D] && player1_x < 640 - player1->w)
45  {
46    player1_x += player_speed;
47  }
48  if(key[KEY_W] && player1_x > 0 && player1_x < 640 - player1->w && player1_y > 0 && player1_y < 480 - player1->h)
49  {
50    player1_y -= player_speed * fixtof(fcos(ftofix(player1_rotate)));
51    player1_x += player_speed * fixtof(fsin(ftofix(player1_rotate)));
52  }
53  if(key[KEY_S] && player1_y < 480 - player1->h)
54  {
55    player1_y += player_speed;
56  }
57  if(player1_y + player1->h >= 480)
58  {
59        player1_y = 479 - player1->h;
60    }
61    if(player1_y <= 0)
62    {
63        player1_y = 1;
64    }
65    if(player1_x <= 0)
66    {
67        player1_x = 1;
68    }
69    if(player1_x + player1->w >= 640)
70    {
71        player1_x = 639 - player1->w;
72    }
73  get_mouse_mickeys(&mickeyx, &mickeyy);
74  player1_rotate += mickeyx;
75  
76  
77}
78 
79int main(int argc, char *argv[])
80{
81  allegro_init();
82  install_keyboard();
83  install_mouse();
84  set_mouse_speed(1,1);
85  set_color_depth(16);
86  set_gfx_mode(GFX_AUTODETECT_WINDOWED,640,480,0,0);
87  cout << bullet_x << "  " << bullet_y << endl;
88 
89  buffer = create_bitmap(640,480);
90 
91  player1 = load_bitmap("player.bmp", NULL);
92     
93  player2 = load_bitmap("player.bmp", NULL);
94  
95 
96  
97     
98  while(!key[KEY_ESC])
99  {                      
100    player1_movement();
101    bullet_move();
102    rotate_sprite(buffer, player1, player1_x, player1_y, ftofix(player1_rotate));
103    blit(buffer, screen,0,0,0,0,640,480);
104    clear_bitmap(buffer);
105  }
106 
107  destroy_bitmap(player1);
108  destroy_bitmap(player2);
109  destroy_bitmap(buffer);
110 
111  return 0;
112}
113END_OF_MAIN()

Myrdos

Member #1,772

December 2001

Well, I don't see any kind of delay in your code. My guess: the player's movement seems to be linked to the key repeat rate, which prevents it from moving at an insane speed. There is no such limiter for your bullet. Thus, it flies off the screen too quickly to see.

To make your game run at the same speed on different computers, see here.

__________________________________________________

neil dwyer

Member #7,237

May 2006

Hmm, that is seems to be it because my cout << bullet_x << bullet_y shows that the bullet moves very fast. How should I fix it, maybe a timer?

EDIT: oops, didn't see the end of your post.

Lucid Nightmare

Member #5,982

July 2005

Where's the timer for the code???

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