pxt-calliope/olddocs/js/lessons/meteorite/quiz-answers.md
2016-04-15 14:37:25 -07:00

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meteorite quiz answers

create the game meteorite.

Name

Directions

This is the answer key for the meteorite quiz

1. Write the code that sets up the position variables of meteorite 1. (Hint: look inside the function "initialize game".)


meteorite_1X = Math.random(5)
meteorite_1Y = -4

2. Write the code that plots the initial position of the ship. (Hint: look inside the function "initialize game".)


led.plot(shipLeftX, 4)
led.plot(shipLeftX + 1, 4)

3. Write the code that will detect if a meteorite 1 collided with the ship. (Hint: look inside the function "move meteorite 1".


if (meteorite_1X == 4 && (shipLeftX == meteorite_1X || shipLeftX + 1 == meteorite_1X)) {
    gameOver()
}

4. Write the code that increase the difficulty by making the game run faster.


pauseDifficulty = (pauseDifficulty * 49) / 50

5. Write the code that moves the ship left.


led.unplot(shipLeftX + 1, 4)
shipLeftX = shipLeftX - 1
led.plot(shipLeftX, 4)

6. Write the code that moves the ship right.


led.unplot(shipLeftX, 4)
shipLeftX = shipLeftX + 1
led.plot(shipLeftX + 1, 4)

7. Write the function that checks if moving the ship resulted in a collision with meteorite 1.


if (shipLeftX == meteorite_1X && meteorite_1Y == 4) {
    gameOver()
}

8. Write the code that flashes all the LEDs thee times to create the effect of a crash. (Hint: look at the function "game over".)


led.plotAll()
for (let i = 0; i < 3; i++) {
    led.fadeIn(400)
    led.fadeOut(400)
}