Function createMask
Generate a mask from a region of tiles based on a condition.
For each tile in the grid, sets the corresponding element of mask to the result of fn(tile).
If a coordinate is out of bounds (e.g. if you are generating a mask from a slice that extends
over the map border) the mask value is the init value of the mask's element type.
Prototype
void createMask(alias fn, T, U)( T grid, RowCol offset, ref U mask ) if (__traits(compiles, () { mask[0][0] = fn(grid.tileAt(RowCol(0, 0))); } ));
Parameters
| Name | Description |
|---|---|
| fn | function that generates a mask entry from a tile |
| grid | grid to generate mask from |
| offset | map coord from which to start the top-left corner of the mask |
| mask | rectangular array to populate with generated mask values.
must match the size of the grid |
Authors
Copyright
Copyright © 2015, Ryan Roden-Corrent