149 lines
3.7 KiB
Markdown
149 lines
3.7 KiB
Markdown
# catch the egg game challenges
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## Before we get started
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Your starting code should look like this:
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```blocks
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let basketX = 2
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let eggX = 2
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let eggY = 0
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basic.forever(() => {
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led.unplot(basketX, 4)
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led.unplot(eggX, eggY)
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eggY = eggY + 1
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led.plot(eggX, eggY)
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basic.pause(300)
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let accX = input.acceleration(Dimension.X)
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basketX = 2 + Math.min(2, Math.max(-2, accX / 200))
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led.plot(basketX, 4)
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if (eggY > 4) {
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eggY = -1
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eggX = Math.random(5)
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}
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basic.pause(300)
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})
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```
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## ~avatar avatar impressed
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## Challenge 1
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Let's use an **IF** statement to detect if the egg and the basket are lined up.
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Now that we know when an egg is caught, we can keep track of the score! We need to use the `add score` function built into the game library to add `1` point for every egg that is caught. However, let's not forget to `remove life` if an egg falls off the display before it's caught!
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## ~
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```blocks
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let basketX1 = 2
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let eggX1 = 2
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let eggY1 = 0
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basic.forever(() => {
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led.unplot(basketX1, 4)
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led.unplot(eggX1, eggY1)
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eggY1 = eggY1 + 1
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led.plot(eggX1, eggY1)
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basic.pause(300)
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let accX = input.acceleration(Dimension.X)
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basketX1 = 2 + Math.min(2, Math.max(-2, accX / 200))
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led.plot(basketX1, 4)
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if (eggY1 > 4) {
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eggY1 = -1
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eggX1 = Math.random(5)
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}
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if (eggY1 == 4) {
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if (basketX1 == eggX1) {
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game.addScore(1)
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} else {
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game.removeLife(1)
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}
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}
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basic.pause(300)
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})
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```
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* Press the `run` button to test out your game.
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## ~avatar avatar encourage
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## Challenge 2
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Catching eggs gets easier with practice so let's make the eggs fall faster every 5 catches. We can do this by tracking how long the egg pauses in each position while falling with a global variable called **falling pause**. Let's create this variable and set it to `300` initially. Don't forget to also create a condition that will be true every 5 catches.
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## ~
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```blocks
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let basketX2 = 2
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let eggX2 = 2
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let eggY2 = 0
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let fallingPause = 300 // ***
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basic.forever(() => {
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led.unplot(basketX2, 4)
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led.unplot(eggX2, eggY2)
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eggY2 = eggY2 + 1
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led.plot(eggX2, eggY2)
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basic.pause(300)
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let accX2 = input.acceleration(Dimension.X)
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basketX2 = 2 + Math.min(2, Math.max(-2, accX2 / 200))
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led.plot(basketX2, 4)
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if (eggY2 > 4) {
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eggY2 = -1
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eggX2 = Math.random(5)
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}
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if (eggY2 == 4) {
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if (basketX2 == eggX2) {
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game.addScore(1)
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if (game.score() %5 == 0) {
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}
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} else {
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game.removeLife(1)
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}
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}
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basic.pause(300)
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})
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```
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## ~avatar avatar surprised
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## Challenge 3
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Let's make the egg fall faster by decreasing the amount of time it pauses in each position by decreasing **falling pause** by `25` every 5 catches. Now, instead of pausing for 300 milliseconds we can pause for the value of **falling pause**.
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```blocks
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let basketX3 = 2
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let eggX3 = 2
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let eggY3 = 0
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let fallingPause1 = 300
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basic.forever(() => {
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led.unplot(basketX3, 4)
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led.unplot(eggX3, eggY3)
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eggY3 = eggY3 + 1
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led.plot(eggX3, eggY3)
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basic.pause(300)
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let accX3 = input.acceleration(Dimension.X)
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basketX3 = 2 + Math.min(2, Math.max(-2, accX3 / 200))
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led.plot(basketX3, 4)
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if (eggY3 > 4) {
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eggY3 = -1
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eggX3 = Math.random(5)
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}
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if (eggY3 == 4) {
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if (basketX3 == eggX3) {
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game.addScore(1)
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if (game.score()% 5 == 0) {
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fallingPause1 = fallingPause1 - 25 // ***
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}
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} else {
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game.removeLife(1)
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}
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}
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basic.pause(fallingPause1)
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})
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```
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Fantastic! Your game is now ready to show off.
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* Press the `run` button to see your finished game!
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