Constrained perspective transformations
Operating System: all
Description of the feature
This is an enhancement request that asks for restricting an existing feature: In the perspective tool one can make "any" transformation. However for some simple perspective transformations a restricted mode seem helpful. Like "symmetric mode" that would move left and right (top and bottom) handles symmetrically. Or "constrained mode" that would restrict movements of the "control boxes" either horizontally or vertically.
At the moment both are hard to achieve.
As a related enhancement, there is a matrix display, but you cannot enter values to the matrix directly. (It might be possible to add symmetry as "matrix post-processing", but actually I'm not sure how the mathematics would look like)
Use cases
Use case: Add perspective to a hexagon
I tried to add perspective to a hexagon (obviously there is not just non-uniform scaling).