Difference between revisions of "FSOSS 2010/processing.js/vectors"
| Line 8: | Line 8: | ||
<b>Operations</b><br /> | <b>Operations</b><br /> | ||
| − | <b>Add</ | + | <br /> |
| − | <b>Scale</b> a vector by multiplying by | + | <b>Addition</b> |
| + | <ul> | ||
| + | <li>Add two vectors geometrically by adding head to tail</li> | ||
| + | <li>Add two vectors algebraically by adding their components [3, 3] + [1, 2] = [4, 5]</li> | ||
| + | <li>PVector.add(PVector)</li> | ||
| + | </ul> | ||
| + | |||
| + | <b>Scale</b> | ||
| + | <ul> | ||
| + | <li>Scale a vector geometrically by stretching or shrinking</li> | ||
| + | <li>Scale a vector algebraically by multiplying all components by scalar [1,3] * 2 = [2, 6]</li> | ||
| + | <li>PVector.mult(float)</li> | ||
| + | </ul> | ||
Revision as of 21:09, 27 October 2010
Vectors
- Object with a direction and magnitude (length)
- Typically represented using coordinates for simplicity
- Used for storing position, velocity, acceleration, etc.
- Processing has a built-in PVector object for 2D and 3D
Operations
Addition
- Add two vectors geometrically by adding head to tail
- Add two vectors algebraically by adding their components [3, 3] + [1, 2] = [4, 5]
- PVector.add(PVector)
Scale
- Scale a vector geometrically by stretching or shrinking
- Scale a vector algebraically by multiplying all components by scalar [1,3] * 2 = [2, 6]
- PVector.mult(float)
