Transformation Matrix (changes)
Showing changes from revision #3 to #4:
Added | Removed | Changed
Programmer's Draw Reference Manuals
» Transformation MatrixPart 8 - Non-kernel input/output?
» The Font Manager?
» SWI Calls
» Font_FindFont
» Font Identifier String
» Font Transformation Matrix
» Transformation Matrix
Transformation Matrix
| Offset | Var | Contents |
|---|---|---|
| +0 | a | X multiplier, for new x |
| +4 | b | X multiplier, for new y |
| +8 | c | Y multiplier, for new x |
| +12 | d | Y multiplier, for new y |
| +16 | e | X translation, in draw units |
| +20 | f | Y translation, in draw units |
Notes
The new co-ordinates are calculated using the following formulas: formulae:
new x = ax + cy + e
new y = bx + dy + f
Or in matrix form:
| a | b | 0 |
| c | d | 0 |
| e | f | 1 |
See also
Social
Follow us on
and
and
ROOL Store
Buy RISC OS Open merchandise here, including SD cards for Raspberry Pi and more.