space_pirate space_pirate_update(space_pirate p, whitgl_fvec target)
{
if(!p.e.active)
return p;
whitgl_fvec diff = whitgl_fvec_sub(target, p.e.pos);
whitgl_float target_angle = whitgl_fvec_to_angle(diff)+whitgl_pi/2;
whitgl_float ang_diff = whitgl_fwrap(target_angle-p.e.angle, -whitgl_pi, whitgl_pi);
whitgl_bool r, l;
if(ang_diff > 0.2)
{
r = true;
l = false;
}
else if(ang_diff < -0.2)
{
r = false;
l = true;
}
else
{
l = true;
r = true;
}
if(l&&r)
{
whitgl_fvec impulse = {0,-0.002};
impulse = whitgl_rotate_point_around_point(impulse, whitgl_fvec_zero, p.e.angle);
p.speed = whitgl_fvec_add(p.speed, impulse);
}
if(l)
p.angle_speed = whitgl_fclamp(p.angle_speed-0.01, -0.2, 0.2);
if(r)
p.angle_speed = whitgl_fclamp(p.angle_speed+0.01, -0.2, 0.2);
p.angle_speed = p.angle_speed*0.9;
p.e.angle = whitgl_fwrap(p.e.angle+p.angle_speed, 0, whitgl_pi*2);
p.e.pos = whitgl_fvec_add(p.e.pos, p.speed);
p.speed = whitgl_fvec_interpolate(p.speed, whitgl_fvec_zero, 0.01);
whitgl_int i;
for(i=0; i<2; i++)
{
whitgl_bool on = i == 0 ? r : l;
// if(on && !p.was_on[i])
// whitgl_sound_play(i == 0 ? SOUND_THRUST_L : SOUND_THRUST_R, 1.0);
// p.was_on[i] = on;
whitgl_float target = on ? 1 : 0;
p.engine_thrust[i] = p.engine_thrust[i]*0.6 + 0.4*target;
}
return p;
}
game_snake game_snake_update(game_snake snake, const game_map* map)
{
whitgl_fvec joy = whitgl_input_joystick();
if(whitgl_input_pressed(WHITGL_INPUT_A))
snake.do_reverse = true;
if(snake.do_reverse)
joy = whitgl_fvec_zero;
whitgl_int dir = whitgl_fvec_to_facing(joy);
bool moving = joy.x != 0 || joy.y != 0;
snake.falling = true;
whitgl_int i;
for(i=0 ;i<snake.size; i++)
{
whitgl_int j;
for(j=0; j<4; j++)
{
whitgl_ivec test_pos = whitgl_ivec_add(snake.pos[i], whitgl_facing_to_ivec(j));
if(j!=2 && (i==snake.size-1 || i==0))
continue;
if(j==2 && game_map_get_tile(map, test_pos) == TILE_WALL)
snake.falling = false;
if(j==2 && game_map_get_tile(map, test_pos) == TILE_PLATFORM)
snake.falling = false;
if(j==2 && game_map_get_tile(map, test_pos) == TILE_BEAM)
snake.falling = false;
}
if(game_map_get_tile(map, snake.pos[i]) == TILE_VINE)
snake.falling = false;
}
if(game_map_get_tile(map, snake.new_pos) == TILE_WALL && _game_snake_move_valid(snake, snake.new_pos, map))
snake.falling = false;
if(snake.falling)
{
snake.fall_speed = whitgl_fclamp(snake.fall_speed+0.02, 0, 0.5);
snake.fall_timer += snake.fall_speed;
if(snake.fall_timer > 0.5)
{
for(i=0 ;i<MAX_SEGMENTS; i++)
{
snake.pos[i].y++;
}
snake.new_pos.y++;
snake.fall_timer -= 1;
}
} else
{
snake.fall_timer = 0;
snake.fall_speed = 0;
}
if(!moving && !snake.do_reverse )
{
return snake;
}
bool forward = true;
if(dir != snake.dir && snake.t < 0.5)
forward = false;
if(!_game_snake_move_valid(snake, snake.new_pos, map))
forward = false;
whitgl_float inc = forward ? 1.0/8.0 : -1.0/4.0;
whitgl_float old_snake_t = snake.t;
snake.t = whitgl_fclamp(snake.t+inc, 0, 1);
if(old_snake_t <= 0.5 && snake.t > 0.5)
{
snake.old_pos = snake.pos[snake.size-1];
for(i=MAX_SEGMENTS-1; i>0; i--)
snake.pos[i] = snake.pos[i-1];
snake.pos[0] = snake.new_pos;
if(whitgl_randfloat() > 0.5)
whitgl_sound_play(SOUND_SLICK00+whitgl_randint(6), whitgl_randfloat()*0.2+0.9);
}
if(snake.t == 0 || snake.t == 1)
{
if(snake.do_reverse)
{
game_snake new_snake = snake;
for(i=0; i<snake.size; i++)
new_snake.pos[i] = snake.pos[snake.size-1-i];
new_snake.dir = whitgl_ivec_to_facing(whitgl_ivec_sub(snake.pos[snake.size-1], snake.pos[snake.size-2]));
new_snake.do_reverse = false;
new_snake.old_pos = snake.new_pos;
new_snake.new_pos = snake.old_pos;
snake = new_snake;
whitgl_sound_play(SOUND_SWAP, whitgl_randfloat()*0.5+0.75);
snake.t = 1;
}
whitgl_ivec new_pos = whitgl_ivec_add(snake.pos[0], whitgl_facing_to_ivec(dir));
if(_game_snake_move_valid(snake, new_pos, map))
{
snake.new_pos = new_pos;
snake.dir = dir;
snake.t = 0.1;
}
}
return snake;
}
