Reference


• Angles
• Sprite Arrange
• Changing sprites
• Child sprites
• Cloning sprites
• Collision detection
• Completion events
• Composition
• Coordinate space
• Data
• Drawing
• Expressions
• Flipbooks
• Joysticks
• Mouse events
• Movement
• Pursuits
• Range detection
• Reveal sprites
• Rotation
• Scaling and fading
• Shearing
• Sound
• Timing
• Touch events
• Variables

Angles

Angles are based on the unit circle. That is, 360 degrees around where 0 degrees is to the right and 90 degrees points up. (You should know the rest from high school.)

2 special notes:

1. Child sprite angles are relative to its parent sprite. Therefore if the parent sprite is at a 10 degree angle relative to the browser window, and the child sprite is angled at 10 degrees, then the child sprite will be at a 20 degree angle relative to the browser window.
2. Sprites are assumed to be angled at 0 degrees when initially launched unless you have explicitly given the angle in your sprite definition.

Zero and 45 degrees

create routine as Start launch arrow0 launch arrow45 end create sprite from arrow-sm-blue.png as arrow0 where x=150 and y=100 end create sprite from arrow-sm-blue.png as arrow45 where x=150 and y=100 and angle=45 end
editable