- Game Lab
- Drawing Shapes
- Shapes and Parameters
- Sprites
- The Counter Pattern
- Velocity and the Counter Pattern
- The Draw Loop
- Debugging with Watchers
- Animation Tab
- App Lab
- Responding to User Input
- Taking Input with getProperty
- Multi-Screen Apps
- Changing Screens
- Designing Screens with Code
- The Counter Pattern
- Design Mode
- If Statements
- App Lab Table Data Storage
- Maker Toolkit
- Circuit Playground
- Color Lights
- Playing Notes
- Analog Sensors
- Changing Sensor Scale
- Physical Input
- Producing Output
- Circuits and Buttons
- Circuits and LEDs
- The Accelerometer
- Accelerometer Events
- Board Events
- Data and Change Events
- JavaScript
- Booleans and Comparison Operators
- If Statements
- If-Else Statements
- For Loops
- Timed Loop
- Timed For Loop
- Variables
- Naming Variables
- Arrays
- Modifying Arrays
- Random Numbers
- Functions
- Patterns
- HTML
- CSS
- Patterns
- Counter Patterns with Event
- Variable with String Concatenation Pattern
- The updateScreen() Pattern
- Checking Multiple Conditions with If-Else-If
- Random List Access Pattern
- List Scrolling Pattern
- When to Make a Function
- Debugging Variable Scope: Functions
- List Filter Pattern
- List Reduce Pattern
- Other
- AI Lab
Concepts
Velocity
The velocity blocks (velocityX and velocityY), tell sprites how fast to move in a particular direction, just as the counter pattern did before. By hiding the counter pattern code inside a block, you can build even more complex programs.
Movement with Velocity
The code that uses the counter pattern is on the left, and the code that uses the velocity blocks is on the right.
With velocityX and velocityY, you can set the sprites' velocities when you first create them, but both programs will make the sprites move as in the picture below.
Found a bug in the documentation? Let us know at documentation@code.org