Simulate mouse button presses via keyboard

Some apps that I use function better with a mouse or trackpad with mechanical buttons than with a buttonless trackpad.

These are mainly 3d graphic/animation apps which use, for example, left, right, and left+right combination buttons for rotate, zoom, and translate.

left+right combination is impossible with buttonless trackpad.

Please advise me of any apps you know of which can define keyboard shortcuts to simulate mouse button presses.

I am aware of bettertouchtool. However it does not satisfy my need because it only seems to be able to define mouse clicks (i.e. brief events) rather than mouse button holds (simulated press for the entire duration I am holding the keyboard modifier).

 

Mouse chording (simultaneous left and right click) like you can do on a mouse/trackpad with discrete mechanical buttons is not possible with this method.

I guess I didn't explain myself thoroughly enough. The apps I referred to in the original post require holding left, right, or mouse button chording whilst moving the cursor at the same time in order to zoom, rotate, or pan an image. So two finger tap is of no use for this task.