A self-contained 3D renderer for embedded targets: a binary asset container, skeletal animation, tile binning, a software rasterizer and a 2D canvas. Header-only, with no third-party dependency of any kind.
Touch input for DGX displays: the fingers of a touch panel as fingers of the display, turned with the screen; a calibration measured on the board; gestures in millimetres; buttons the program draws; a translucent game pad in a layer of DGX and a keyboard on the display, with editors of their layouts and looks; a GSL3680 driver and any esp_lcd_touch panel