static int gen_monster(lua_State* L) {
GameState* gs = lua_get_gamestate(L);
MTwist& mt = gs->rng();
int nargs = lua_gettop(L);
GeneratedLevel* level = lua_togenlevel(L, 1);
enemy_id etype = enemy_from_lua(L, 2);
Region r = lua_toregion(L, 3);
int amount = nargs >= 4 ? lua_tointeger(L, 4) : 1;
bool success = generate_enemy(*level, mt, etype, r,
gs->teams().default_enemy_team(), amount);
lua_pushboolean(L, success);
return 1;
}
/** init_model: Used to initialize the values of a given model.
* It takes a pointer to a model and changes it's values
* to set values, instead of having to call all of the
* functions individually.
*
* @param: modelPtr
* A pointer to an object of the Model structure type.
*
* @return: none
*
*/
void init_model(struct Model *modelPtr) {
int i;
set_score(modelPtr, 0); /* initialize score to 0 */
set_player_move_requested(modelPtr, 0, 0);
set_player_deltaX(modelPtr, 0, 8);
set_player_deltaY(modelPtr, 0, 8);
set_player_cor(modelPtr, 0, 20, 160); /* set player 1's position in play area */
set_player_alive(modelPtr, 0, 0); /* set player 1's alive state to true */
for(i = 0; i < NUM_ENEMIES; i++) {
generate_enemy(modelPtr, i);
}
}
/*
Purpose: Moves the enemy ship to a new coordinate, and resets it if needed
Param: pointer to model
enemy num: 0 = enemy 1, 1 = enemy 2, ...
*/
void move_enemy_ship(struct Model *modelPtr, UINT16 enemy) {
UINT16 enemy_posX;
UINT16 enemy_deltaX;
/* Get enemy's current position, and "speed" */
enemy_posX = get_enemy_posX(modelPtr, enemy);
enemy_deltaX = get_enemy_deltaX(modelPtr, enemy);
/* Update the enemies position if it isn't on the left side of the screen */
if (enemy_posX <= 568) {
enemy_posX -= enemy_deltaX;
set_enemy_cor(modelPtr, enemy, enemy_posX, get_enemy_posY(modelPtr,enemy));
}
else {
/* If it is on the left side of the screen, then generate a new starting position */
generate_enemy(modelPtr, enemy);
}
}
void gameLoop()
{
// Set our game data
shipRow = 55;
shipCol = 0;
enemyCol = 225;
enemy_num = 0;
projectile_num = 0;
time_diff = 0;
kills = 0;
REG_DISPCNT = MODE3 | BG2_ENABLE;
EntityClass player_ship;
initialize_entity( &player_ship, SHIP_WIDTH, SHIP_HEIGHT, shipRow, shipCol );
EntityClass enemy;
initialize_entity( &enemy, 0, 0, 0, 0 );
enemies[max_enemies+1] = enemy;
while (lives != 0)
{
// Check if player won the level.
if( kills == 10 )
{
state = WIN;
break;
}
// Draw background
drawImage3( 0, 0, BACKGROUND_WIDTH, BACKGROUND_HEIGHT, background );
// Draw ship
draw_entity( &player_ship, ship );
// Generate enemy
if( time_diff <= 0 && enemy_num < 10 )
{
time_diff = 75;
int rand_row = ( rand() % (120+1-20) ) + 20;
generate_enemy( rand_row, enemyCol );
}
// Draw Enemy
update_enemies();
// Draw each projectile
update_projectiles();
// Check if player is dead.
if( is_player_dead( &player_ship ) == 1 )
{
lives--;
gameLoop();
}
check_collisions();
remove_old_projectiles();
remove_old_enemies();
// Draw lives
for( int i = 0; i < lives; i++ )
{
drawImage3( 140, 170 + ( i * 25 ), SHIP_WIDTH, SHIP_HEIGHT, ship );
}
waitForVblank();
// If player hits 'select' return to titleScreen and start game over.
if( KEY_DOWN_NOW( BUTTON_SELECT ) )
{
state = TITLE;
break;
}
// Player Actions
if( KEY_DOWN_NOW( BUTTON_DOWN ) )
{
if( get_row( &player_ship ) < 121 )
move_entity( &player_ship, 2, 0 );
}
if( KEY_DOWN_NOW( BUTTON_UP ) )
{
if( get_row( &player_ship ) > 20 )
move_entity( &player_ship, -2, 0 );
}
if( KEY_DOWN_NOW( BUTTON_A ) )
{
while( KEY_DOWN_NOW( BUTTON_A ) ) {
;
}
fire_weapon( &player_ship );
}
time_diff--;
}
if( lives == 0 )
{
state = GAME_OVER;
}
else if( state == WIN )
return;
}
