pixel_to_braille: Convert pixel coordinates to Braille cell and dot position
Description
Convert pixel coordinates to Braille cell and dot position
Usage
pixel_to_braille(px, py, canvas_rows, canvas_cols)
Value
List with cell_row, cell_col, dot_row, dot_col
Arguments
- px
Pixel x coordinate (1-based)
- py
Pixel y coordinate (1-based, from top)
- canvas_rows
Number of character rows in canvas
- canvas_cols
Number of character columns in canvas