Orientation of a matrix

[RFLTools]

Is there a way to simply change the start position of a pixel? i.e. revise the Pixel 0 position from TOP-LEFT to, say, LOWER-RIGHT?

I ask because I'm reusing a WLED project where I constructed a 3D printed frame using 3 16x16 panels and the spectrum project in NightDriver is upside-down. I'd prefer not to have to rip apart my frame to reinstall the panels rotated 180 degrees.

[rbergen]

If I read your question correctly, you're actually looking for a way to rotate the orientation of the matrix by 180 degrees. I didn't test this, but you could try adding the following line to the very start of the LEDMatrixGFX::StartMatrix() function in ledmatrixgfx.cpp:

    matrix.setRotation(rotation180);

[RFLTools]

You read correctly but unfortunately the Spectrum doesn't use he Matrix libraries. As such I did find a solution by adding:
x = _width - x - 1; y = _height - y - 1;
to the start of
inline virtual uint16_t xy(uint16_t x, uint16_t y) const
Which would essentially accomplish the same as rotating 180 degrees.

Oh - and thanks for the prompt reply!

Edit: Just to be clear if anyone is trying to resolve the same issue, the changes were made to gfxbase.h

[rbergen]

Well, based on how useful my reply was, next time I should probably spend more time looking into things and answer more slowly. Anyway, I'm glad you found a solution that does work!

[davepl]

Good point - you can do whatever remapping (rotations, flips, mirrors) you like in the xy virtual override.

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On Mar 9, 2023, at 8:40 AM, Robert Livingston ***@***.***> wrote: You read correctly but unfortunately the Spectrum doesn't use he Matrix libraries. As such I did find a solution by adding: x = _width - x - 1; y = _height - y - 1; to the start of inline virtual uint16_t xy(uint16_t x, uint16_t y) const Which would essentially accomplish the same as rotating 180 degrees. Oh - and thanks for the prompt reply! — Reply to this email directly, view it on GitHub <#236 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AA4HCF23X72BTSQX7UE4EXTW3IBWBANCNFSM6AAAAAAVUZILHI>. You are receiving this because you are subscribed to this thread.

[RFLTools]

Oh, and just a comment off topic: Those M5StickC Plus controllers are fantastic!

I was going to use a more standard ESP32 with an I2S mic but your videos made me aware of them - great little devices with so many features (and quite inexpensive considering all the features).

[davepl]

Check out their website, they have a TON of cool modules and adding! https://m5stack.com/

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On Mar 9, 2023, at 10:48 AM, Robert Livingston ***@***.***> wrote: Oh, and just a comment off topic: Those M5StickC Plus controllers are fantastic! I was going to use a more standard ESP32 with an I2S mic but your videos made me aware of them - great little devices with so many features (and quite inexpensive considering all the features). — Reply to this email directly, view it on GitHub <#236 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AA4HCF3VECLG3HMIKXYG3JLW3IQZRANCNFSM6AAAAAAVUZILHI>. You are receiving this because you commented.

[RFLTools]

lol - just what I need to look into after my wife's instruction to "stop buying $hit"...

[davepl]

OT: I once saw an eBay auction that offered to include a “cheap” invoice “for your wife”. No idea if he was kidding...

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On Mar 9, 2023, at 10:57 AM, Robert Livingston ***@***.***> wrote: lol - just what I need to look into after my wife's instruction to "stop buying $hit"... — Reply to this email directly, view it on GitHub <#236 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AA4HCFZLE6HP6XOQQ3GIZ73W3IR3PANCNFSM6AAAAAAVUZILHI>. You are receiving this because you commented.