47  Heads-up Display (HUD)

This walkthrough examines the HUD text widgets defined in linuxdoom-1.10/hu_lib.h and their initialization in hu_lib.c.

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47.1 hu_lib.h Highlights

47.1.1 hu_textline_t

Lines 45–59 define a single-line text widget: - Position: (x, y) - Font array: f - Start character: sc - Character buffer: l - Current length: len - Update flag: needsupdate

47.1.2 hu_stext_t

Lines 65–75 define a scrolling multi-line text widget: - Text lines: l[HU_MAXLINES] - Window height: h - Current insert line: cl - Visibility flag: on

47.1.3 hu_itext_t

Lines 81–92 define a user input text line: - Embedded hu_textline_t - Left margin: lm - Visibility flag: pointer on - Last-on state: laston

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47.2 hu_lib.c Highlights

47.2.1 HUlib_initTextLine

Lines 53–66: - Sets position (x, y), font f, and start character sc - Clears text via HUlib_clearTextLine

47.2.2 HUlib_initSText

Lines 176–197: - Sets height h, on flag, and resets cl - Calls HUlib_initTextLine on each sub-line

47.2.3 HUlib_initIText

Lines 270–282: - Sets lm = 0, initializes on and laston - Calls HUlib_initTextLine for its internal textline

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That was it.