Run text rotation

[Solaerts]

I have 2 matrix of 64x32 and I have connected them in parallel to have one matrix of 64x64. I was scrolling a text from right to left but I want to to scroll from up to down. How do I do that pls ? I am using a raspberry pi 2 and I am coding in python with Thonny.

[hzeller]

You want it to be 90 degrees rotated ? You can use the rotate mapper: https://github.com/hzeller/rpi-rgb-led-matrix/tree/master/examples-api-use#rotate

[Solaerts]

I already done that, and it's not the result I am expecting. The result I want looks like this :

H E L L O

This scrolling from up to down.

[hzeller]

ah, that is simply how you program where the characters to appear. So you want to break your string apart into letters and write them at the same X pos and with a Y pos shifted according to the font height. And for scrolling you add an offset to the y coordinate for all of them (so for each update of the screen you add an offset for all characcters to be a bit more down).

But that is purely what your program will have to do, not an issue in or feature needed from this library.

[anandrajgupta]

"VerticalDrawText" function

https://github.com/hzeller/rpi-rgb-led-matrix/blob/master/lib/led-matrix-c.cc

[hzeller]

Ah, good point, I forgot that DrawVerticalText() was available.

[Solaerts]

Ok thanks guys it will help a lot.