Module ROT.FOV.Precise
Precise Shadowcasting Field of View calculator.
The Precise shadow casting algorithm developed by Ondřej Žára for rot.js. See http://roguebasin.roguelikedevelopment.org/index.php?title=Precise_Shadowcasting_in_JavaScript
Functions
| init (lightPassesCallback, options) | Constructor. |
| compute (x, y, R, callback) | Compute. |
Functions
- init (lightPassesCallback, options)
-
Constructor.
Called with ROT.FOV.Precise:new()
Parameters:
- lightPassesCallback function A function with two parameters (x, y) that returns true if a map cell will allow light to pass through
- options Options
- topology int Direction for light movement Accepted values: (4 or 8)
- compute (x, y, R, callback)
-
Compute.
Get visibility from a given point
Parameters:
- x int x-position of center of FOV
- y int y-position of center of FOV
- R int radius of FOV (i.e.: At most, I can see for R cells)
- callback A function that is called for every cell in view. Must accept four parameters.
- x int x-position of cell that is in view
- y int y-position of cell that is in view
- r int The cell's distance from center of FOV
- visibility number The cell's visibility rating (from 0-1). How well can you see this cell?