enemy.cpp

00001 #include "enemy.h"
00002 #include "missile.h"
00003 
00004 void draw_enemy(int blk_x, int blk_y, int enemy_color, int e_width, int e_height)
00005 {
00006     uLCD.filled_rectangle(blk_x,blk_y,blk_x+e_width,blk_y-e_height,enemy_color);
00007 }
00008 
00009 void erase_enemy(int blk_x, int blk_y, int enemy_color, int e_width, int e_height)
00010 {
00011     uLCD.filled_rectangle(blk_x,blk_y,blk_x+e_width,blk_y-e_height,BACKGROUND_COLOR);
00012 }
00013 
00014 int move_enemy(enemy_t * g, int MOVE_DOWN, int DIRECTION)
00015 {
00016     if (g->status == ENEMY_ALIVE)
00017     {   
00018         if (DIRECTION == 1)
00019         {
00020             enemy_erase(g);
00021             g->enemy_blk_x += 1;
00022             enemy_show(g);
00023             
00024             if (g->enemy_blk_y >= 110)
00025             {
00026                 MOVE_DOWN = 2;
00027             }
00028         }
00029         else if (DIRECTION == 2)
00030         {
00031             enemy_erase(g);
00032             g->enemy_blk_x -= 1;
00033             enemy_show(g);   
00034             
00035             if (g->enemy_blk_y >= 110)
00036             {
00037                 MOVE_DOWN = 2;
00038             }
00039         }
00040         
00041         if ((g->enemy_blk_x+g->enemy_width) > (128-g->enemy_width)
00042         || (g->enemy_blk_x < (0+g->enemy_width)))
00043         {
00044             MOVE_DOWN = 1;
00045         }    
00046     }
00047     return MOVE_DOWN;
00048 }
00049 
00050 void enemy_init(enemy_t * g, unsigned int blk_x, unsigned int blk_y, unsigned int color)
00051 {
00052     g->enemy_blk_x = blk_x;
00053     g->enemy_blk_y = blk_y;
00054     g->enemy_color = color;
00055     g->enemy_width = 8;
00056     g->enemy_height = 8;
00057     g->status = ENEMY_ALIVE;
00058 }
00059 
00060 void enemy_show(enemy_t * g)
00061 {
00062     draw_enemy(g->enemy_blk_x, g->enemy_blk_y, g->enemy_color, g->enemy_width, g->enemy_height);
00063 }
00064 
00065 void enemy_erase(enemy_t * g)
00066 {
00067     erase_enemy(g->enemy_blk_x, g->enemy_blk_y, g->enemy_color, g->enemy_width, g->enemy_height);
00068 }
00069 
00070 int check_enemy(enemy_t * g, missile_t * h)
00071 {
00072     int enemy_died = 0;
00073     if (g->status == ENEMY_ALIVE 
00074     && ((h->missile_blk_x >= g->enemy_blk_x) && (h->missile_blk_x <= (g->enemy_blk_x + g->enemy_width)))) 
00075     {
00076         enemy_erase(g);
00077         g->status = ENEMY_DEAD;
00078         enemy_died = 1;
00079         h->status = PLAYER_MISSILE_EXPLODED;                         
00080     }  
00081     
00082     return enemy_died;
00083 }