c_meyer/pxt-calliope
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Fixes to the 'states of matter' project (#570)

Browse Source
This commit is contained in:
Galen Nickel 2017-11-17 12:11:00 -08:00 committed by Peli de Halleux
parent 0df8e76fb7
commit ae73ae00be
1 changed files with 5 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
docs/projects/states-of-matter/code.md
View File

@ -3,21 +3,18 @@
Have you ever tried to represent the states of matter? Let's try to visually represent various states of matter based on atmospheric temperatures!
## Step 1: Variables.
In order for States of Matter to follow the rules for determining the atmospheric temperature, we need to add variables that will store data. Then we will assign (set) the value of the variables. We want to name the two (2) variables as follows: “atmos_temperature” and “temperature”. Set the value of the variables to 100. Modify your code so that your code looks like this.
In order for States of Matter to follow the rules for determining the atmospheric temperature, we need to add variables that will store data. Then we will assign (set) the value of the variables. We want to name the two (2) variables as follows: “atmos_temperature” and “temperature”. Set the value of the variables to 100. Modify your code so that it looks like this.
```blocks
let temperature = 100
let atmos_temperature = 100
```
## Step 2: Detect a solid.
We want to detect a solid for the atmospheric temperature. On Pin 2 Pressed, you want to represent an atmospheric temperature of 0 and scroll the message SOLID. We want to set atmos_temperature to 0 and show string as a Solid. Modify your code so that your code looks like this:
We want to detect when the solid state occurs. On Pin 2 Pressed, you want to represent an atmospheric temperature of 0 and scroll the message "SOLID". We want to set atmos_temperature to 0 and show the string: "SOLID". Modify your code to look like this:
```blocks
let temperature = 0
@ -28,13 +25,11 @@ input.onPinPressed(TouchPin.P2, () => {
})
atmos_temperature = 100
temperature = 100
```
## Step 3: Detect a liquid.
We want to detect a liquid for the atmospheric temperature. On Pin 1 Pressed, you want to represent an atmospheric temperature of 80 and scroll the message LIQUID. We want to set atmos_temperature to 80 and show string as a liquid. Modify your code so that your code looks like this:
We want to detect when the liquid state happens. On Pin 1 Pressed, you want to represent an atmospheric temperature of 80 and scroll the message "LIQUID". We want to set atmos_temperature to 80 and show the string: "LIQUID". Modify your code to look like this:
```blocks
let temperature = 0
@ -49,20 +44,15 @@ input.onPinPressed(TouchPin.P1, () => {
})
atmos_temperature = 100
temperature = 100
```
## Step 4: Detect a gas.
We want to detect a liquid for the atmospheric temperature. On Pin 1 Pressed, you want to represent an atmospheric temperature of 80 and scroll the message LIQUID. We want to set atmos_temperature to 80 and show string as a liquid. Modify your code so that your code looks like this:
We want to detect when matter will be a gas. On Pin 0 Pressed, you want to represent an atmospheric temperature of 80 and scroll the message "GAS". We want to set atmos_temperature to 250 and show the string: "GAS". Modify your code to look like this:
```blocks
let atmos_temperature = 0
let temperature = 0
input.onGesture(Gesture.Shake, () => {
temperature += 50
basic.showIcon(IconNames.Triangle)
})
input.onPinPressed(TouchPin.P0, () => {
atmos_temperature = 250
basic.showString("GAS")
@ -77,15 +67,13 @@ input.onPinPressed(TouchPin.P1, () => {
})
atmos_temperature = 100
temperature = 100
```
* click *Download* to see if the code works as expected.
## Step 5: Increase temperature.
We want to display a change of temperature on shake. When you shake the states of matter experiment, there will be a show icon to represent an increase in temperature. Modify your code so that your code looks like this:
We want to display a change of temperature on shake. When you shake the states of matter experiment, there will be a show icon to represent an increase in temperature. Modify your code to add the shake event:
```blocks
let atmos_temperature = 0
@ -108,13 +96,10 @@ input.onPinPressed(TouchPin.P1, () => {
})
atmos_temperature = 100
temperature = 100
```
* click Download to see if the code works as expected.
## Step 6: Display temperature change.
We want to conditionally run code depending on whether a Boolean condition is true or false. We want to display certain icons to reflect the temperature being changed on shake. We will create two condition statements. After displaying an icon, the icon will be cleared from the screen with clear screen. Then we will pause program execution for 100 milliseconds. This function is helpful to slow down the program's execution.
@ -165,6 +150,4 @@ input.onPinPressed(TouchPin.P1, () => {
})
atmos_temperature = 100
temperature = 100
```