You're converting the results of sin and cos [-1, 1] into integers.
Just dump all the fixed point and use floats like normal people already. 
Why are there only eight directions? I am assuming it has something to do with allegro degrees and the player1_rotate. My bitmap will rotate all 255 degrees but if I press forward it will only go North, South, East, West, NE, NW, SE, or SW. Sorry for all of my noob questions but I am a noob. Do I have to do the trig in radians and the normal trig functions?
| 1 | #include <allegro.h> |
| 2 | #include <stdlib.h> |
| 3 | |
| 4 | #define speed 1 |
| 5 | |
| 6 | int player1_x = 320; |
| 7 | int player1_y = 240; |
| 8 | int player2_x; |
| 9 | int player2_y; |
| 10 | int player1_rotate; |
| 11 | int player2_rotate; |
| 12 | int mickeyx; |
| 13 | int mickeyy; |
| 14 | int player1_vy; |
| 15 | |
| 16 | void player1_movement() |
| 17 | { |
| 18 | if(key[KEY_A]) |
| 19 | { |
| 20 | player1_x -= speed; |
| 21 | } |
| 22 | if(key[KEY_D]) |
| 23 | { |
| 24 | player1_x += speed; |
| 25 | } |
| 26 | if(key[KEY_W]) |
| 27 | { |
| 28 | player1_y -= speed * fixtoi(fcos(itofix(player1_rotate))); |
| 29 | player1_x += speed * fixtoi(fsin(itofix(player1_rotate))); |
| 30 | } |
| 31 | if(key[KEY_S]) |
| 32 | { |
| 33 | player1_y += speed; |
| 34 | } |
| 35 | get_mouse_mickeys(&mickeyx, &mickeyy); |
| 36 | |
| 37 | player1_rotate += mickeyx / 5; |
| 38 | |
| 39 | } |
| 40 | |
| 41 | int main(int argc, char *argv[]) |
| 42 | { |
| 43 | allegro_init(); |
| 44 | install_keyboard(); |
| 45 | install_mouse(); |
| 46 | set_mouse_speed(1,1); |
| 47 | set_color_depth(16); |
| 48 | set_gfx_mode(GFX_AUTODETECT,640,480,0,0); |
| 49 | |
| 50 | |
| 51 | BITMAP *buffer = create_bitmap(640,480); |
| 52 | |
| 53 | BITMAP *player1 = load_bitmap("player.bmp", NULL); |
| 54 | |
| 55 | BITMAP *player2 = load_bitmap("player.bmp", NULL); |
| 56 | |
| 57 | while(!key[KEY_ESC]) |
| 58 | { |
| 59 | player1_movement(); |
| 60 | rotate_sprite(buffer, player1, player1_x, player1_y, ftofix(player1_rotate)); |
| 61 | blit(buffer, screen,0,0,0,0,640,480); |
| 62 | clear_bitmap(buffer); |
| 63 | } |
| 64 | |
| 65 | destroy_bitmap(player1); |
| 66 | destroy_bitmap(player2); |
| 67 | destroy_bitmap(buffer); |
| 68 | |
| 69 | return 0; |
| 70 | } |
| 71 | END_OF_MAIN() |
Thanks.
]]>You're converting the results of sin and cos [-1, 1] into integers.
Just dump all the fixed point and use floats like normal people already.
how many radians is one allegro degree. It's like 40 something but I want to be exact.
]]>There are 2PI radians in a circle, or 256 Allegro degrees. That means there would be roughly 0.025 radians in 1 Allegro degree.
I think the problem with there only being 8 directions is due to rounding. If you are using itofix, that means you are taking radians (which are float), and rounding them to ints. The loss of data would cause problems like what you had stated.
]]>yes, but does it round to the nearest 16th whole number?
]]>player1_x and player1_y should be floats, not ints. And the thing you add to them should be float, not int.
speed * fixtoi(fcos(itofix(player1_rotate)))
turns into -1, 0 or 1. So when you add that to both x and y, you get only 8 directions.
]]>ok
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