How to draw Fill Triangle using the library Adafruit GFX library?

david_prentice:
Please use native GFX methods in new programs.

UTFTGLUE is only for porting legacy UTFT programs.

You should not mix UTFTGLUE methods with the native GFX methods.

You should certainly never create a UTFTGLUE object at the same time as a MCUFRIEND_kbv object.

Just stick with the native tft object MCUFRIEND_kbv object .

If you do not understand, please say.
I am taking my dog out for a walk. I could "correct" your code if you want me to.

David.

ok, I would appreciate if you help me to correct my code, I do not understand what you mean by using native gfx methods, could you explain me a little more, or send a link where that is explained? Greetings.