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Making a game - Hunted

This activity has the following desired goals:

  • Learning to apply the ideas from the previous few lessons to make a game (M, T).

Step 1

Type in the following code and run it:

clear()
drawStage(cm.black)

val player = Picture.rectangle(50, 50)
player.setFillColor(green)
player.setPenColor(green)

val hunter1 = Picture.rectangle(50, 50)
hunter1.setFillColor(red)
hunter1.setPosition(250, 200)

val hunter2 = Picture.rectangle(50, 50)
hunter2.setFillColor(red)
hunter2.setPosition(-250, -200)

draw(player, hunter1, hunter2)

var vel1 = Vector2D(-3, -3)
var vel2 = Vector2D(4, 5)
var speedplayer = 10

def gameLost() {
    drawCenteredMessage("You Lose", cm.pink, 40)
    stopAnimation()
}

animate {
    hunter1.translate(vel1)
    hunter2.translate(vel2)
    if (hunter1.collidesWith(stageBorder)) {
        vel1 = bouncePicOffStage(hunter1, vel1)
    }

    if (hunter2.collidesWith(stageBorder)) {
        vel2 = bouncePicOffStage(hunter2, vel2)
    }

    if (player.collidesWith(hunter1)) {
        gameLost()
    }

    if (player.collidesWith(hunter2)) {
        gameLost()
    }

    if (player.collidesWith(stageBorder)) {
        gameLost()
    }

    if (isKeyPressed(Kc.VK_RIGHT)) {
        player.translate(speedplayer, 0)
    }
    if (isKeyPressed(Kc.VK_LEFT)) {
        player.translate(-speedplayer, 0)
    }
    if (isKeyPressed(Kc.VK_UP)) {
        player.translate(0, speedplayer)
    }
    if (isKeyPressed(Kc.VK_DOWN)) {
        player.translate(0, -speedplayer)
    }
}

showGameTime(10, "You Win", green, 25)
activateCanvas()

Q1a. Which lines in the above code are used to set up the game stage?

Q1b. Which lines in the above code are used to move the hunters around on the stage?

Q1c. Which lines in the above code are used to move the player around on the stage?

Q1d. Which lines in the above code are used to check if the player has lost the game?

Q1e. Which lines in the above code are used to check if the player has won the game?


Exercise

Add a third hunter to the code above.


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