96 lines
2.8 KiB
Markdown
96 lines
2.8 KiB
Markdown
# Multi Dice
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## Introduction @unplugged
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Build a multi-player dice game using the **radio**. The **radio** blocks let you send wireless messages between a @boardname@ and another @boardname@.
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In this game, you shake to "throw the dice" and send the result to the other @boardname@. If you receive a result of a dice throw equal or greater than yours, you lose.
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## Dice game @fullscreen
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Let's start by rebuilding the **dice** game. If you are unsure about the details, try the **dice** tutorial again.
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```blocks
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input.onGesture(Gesture.Shake, function () {
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basic.showNumber(Math.randomRange(1, 6))
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})
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```
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## Dice variable @fullscreen
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We need to store the result of the dice cast in a variable. A **variable** is like a place in the memory of the @boardname@ where you save information, like numbers.
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* Go to the **Variables** toolbox and click ``||Make a Variable||`` to create a new variable. We will call it **dice**.
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* Add a ``||set dice to||`` block and drag the ``||pick random||`` into it.
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* Drag a ``||dice||`` from the **Variables** toolbox into the ``||basic:show number||`` block.
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```blocks
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let dice = 0
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input.onGesture(Gesture.Shake, function () {
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dice = Math.randomRange(1, 6)
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basic.showNumber(dice)
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})
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```
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## Send the dice @fullscreen
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Put in a ``||radio:send number||`` and a ``||dice||`` to send the value stored in the ``dice`` variable via radio.
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```blocks
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let dice = 0
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input.onGesture(Gesture.Shake, function () {
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dice = Math.randomRange(1, 6)
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basic.showNumber(dice)
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radio.sendNumber(dice)
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})
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```
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## Receive the dice @fullscreen
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Go get an ``||radio:on received number||`` event block. This event runs when a radio message from another @boardname@ arrives. The ``receivedNumber`` value is the value of the dice in this game.
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```blocks
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radio.onReceivedNumber(function (receivedNumber) {
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})
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```
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## Check your cast @fullscreen
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Add a ``||logic:if||`` block to test if ``receivedNumber`` is greater or equal to ``dice``.
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If is, you lost so display a sad face on the screen.
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```blocks
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let dice = 0;
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radio.onReceivedNumber(function (receivedNumber) {
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if (receivedNumber >= dice) {
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basic.showIcon(IconNames.Sad)
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}
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})
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```
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## Test it! @fullscreen
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Try pressing **SHAKE** in the simulator and see that a second @boardname@ appears. You can play the game on both virtual boards.
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If you have more than one @boardname@, download your code onto each one and try playing the game with your friends!
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```blocks
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let dice = 0
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input.onGesture(Gesture.Shake, function () {
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dice = Math.randomRange(1, 6)
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basic.showNumber(dice)
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radio.sendNumber(dice)
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})
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radio.onReceivedNumber(function (receivedNumber) {
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if (receivedNumber >= dice) {
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basic.showIcon(IconNames.Sad)
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}
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})
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```
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```package
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radio
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```
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