pxt-calliope/docs/lessons/dice-roll/activity.md
Sam El-Husseini 6f148c14e0 Fix randomInt
2018-06-01 11:42:38 -07:00

170 lines
2.7 KiB
Markdown

# dice roll activity
Create a dice on the @boardname@
## ~avatar avatar
Welcome! This tutorial will help you create a dice. Let's get started!
## ~
Let's create a condition for when the @boardname@ is shaken.
```blocks
input.onGesture(Gesture.Shake, () => {
})
```
We need to show a random value from 1 to 6 on our dice. So let's make a local variable called **roll**.
```blocks
input.onGesture(Gesture.Shake, () => {
let roll = Math.randomRange(0, 6)
})
```
We need a condition for if **roll** is 5. We will show a `6` if **roll** is 5 because **roll** has a range from 0 to 5. We can use `show LEDs` to display the side of a dice that shows 6.
```blocks
input.onGesture(Gesture.Shake, () => {
let roll = Math.randomRange(0, 6);
if (roll == 5) {
basic.showLeds(`
. # . # .
. . . . .
. # . # .
. . . . .
. # . # .`);
}
});
```
Let's use an `else if` condition for if **roll** is 4. If **roll** is 4 we can show 5 dots on the dice.
```blocks
input.onGesture(Gesture.Shake, ()=> {
let roll = Math.randomRange(0, 6);
if (roll == 5) {
basic.showLeds(`
. # . # .
. . . . .
. # . # .
. . . . .
. # . # .`);
}
else if (roll == 4) {
basic.showLeds(`
. . . . .
. # . # .
. . # . .
. # . # .
. . . . .`);
}
});
```
Now we need to repeat the same steps for if **roll** is 3. If **roll** is 3 we will show `4` on the dice.
```blocks
input.onGesture(Gesture.Shake, () => {
let roll = Math.randomRange(0, 6);
if (roll == 5) {
basic.showLeds(`
. # . # .
. . . . .
. # . # .
. . . . .
. # . # .`);
}
else if (roll == 4) {
basic.showLeds(`
. . . . .
. # . # .
. . # . .
. # . # .
. . . . .`);
}
else if (roll == 3) {
basic.showLeds(`
. . . . .
. # . # .
. . . . .
. # . # .
. . . . .`);
}
});
```
Let's also repeat these steps to show the 3, 2, and 1 on the dice. We are almost done with our dice!
```blocks
input.onGesture(Gesture.Shake, () => {
let roll = Math.randomRange(0, 6);
if (roll == 5) {
basic.showLeds(`
. # . # .
. . . . .
. # . # .
. . . . .
. # . # .`);
}
else if (roll == 4) {
basic.showLeds(`
. . . . .
. # . # .
. . # . .
. # . # .
. . . . .`);
}
else if (roll == 3) {
basic.showLeds(`
. . . . .
. # . # .
. . . . .
. # . # .
. . . . .`);
}
else if (roll == 2) {
basic.showLeds(`
# . . . .
. . . . .
. . # . .
. . . . .
. . . . #`);
}
else if (roll == 1) {
basic.showLeds(`
. . . . .
. # . . .
. . . . .
. . . # .
. . . . .`);
}
else {
basic.showLeds(`
. . . . .
. . . . .
. . # . .
. . . . .
. . . . .`);
}
});
```
## ~avatar avatar
Excellent, you're ready to continue with the [challenges](/lessons/dice-roll/challenges)!
## ~