Arduino Uno Quick Start Manual page 174

hits = 0;
create_target();
}
void create_target() {
target_r = random(7, 11);
target_x = random(target_r, WIDTH - target_r);
target_y = random(target_r, HEIGHT - target_r);
target_count++;
target_creation = millis();
}
The init_game function sets most of the global variables to constant values.
create_target is a bit more interesting. It creates a new target at a random
position and having a random size. We ll use it later on in the game loop
whenever we need to create a new target. Note that the function ensures that
the target always stays within the screen s bounds. Also, it uses the
function to determine the target s creation time.
Adding the Setup and Loop Functions
Like all Arduino programs our little game needs
Tinkering/Pragduino/Pragduino.ino
void setup() {
Line 1
randomSeed(analogRead(A0));
-
tv.begin(PAL, WIDTH, HEIGHT);
-
nunchuk.initialize();
-
init_game();
5
}
-
-
void loop() {
-
check_controls();
-
switch (state) {
10
case INTRO:
-
case STARTING: start_game();
-
case RUNNING:
-
case DONE:
-
}
15
tv.delay_frame(1);
-
}
-
-
void check_controls() {
-
up = down = left = right = c_button = z_button = false;
20
if (nunchuk.update())
-
{
-
if (nunchuk.joystick_x() < 70)
-
left = true;
-
if (nunchuk.joystick_x() > 150)
25
right = true;
-
intro(); break;
break;
update_game(); break;
game_over(); break;
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Creating Your Own Video Game
setup and loop functions:
157
millis
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