BGT Compatibility Layer (bgt_compat.nvgt)

BGT Compatibility Layer

This is an include file that attempts to make old BGT games run in NVGT with minimal modifications, mainly by remapping function names and writing a few convenience wrappers. All function signatures are exactly how they would've been in BGT unless otherwise noted.

Below, you'll find a list of everything this include does, as well as a reference for what each item roughly maps to in native nVGT.

Key constants:

• KEY_PRIOR: KEY_PAGEUP.
• KEY_NEXT: KEY_PAGEDOWN.
• KEY_LCONTROL: KEY_LCTRL.
• KEY_RCONTROL: KEY_RCTRL.
• KEY_LWIN: KEY_LGUI.
• KEY_RWIN: KEY_RGUI.
• KEY_LMENU: KEY_LALT.
• KEY_RMENU: KEY_RALT.
• KEY_LBRACKET: KEY_LEFTBRACKET.
• KEY_RBRACKET: KEY_RIGHTBRACKET.
• KEY_NUMPADENTER: KEY_NUMPAD_ENTER.
• KEY_DASH: KEY_MINUS.

Math functions:

• absolute: abs.
• cosine: cos.
• sine: sin.
• tangent: tan.
• arc_cosine: acos.
• arc_sine: asin.
• arc_tangent: atan.
• power: pow.
• square_root: sqrt.
• ceiling: ceil.

Screen reader speech:

Note that these functions don't map cleanly to how NVGT's API works. As such, substitutions will not be provided here. It is recommended that you use NVGT's built-in screen reader speech functions if you can, they're much more efficient, and much more powerful.

Constants:

• JAWS.
• WINDOW_EYES.
• SYSTEM_ACCESS.
• NVDA.

Functions:

• screen_reader_is_running.
• screen_reader_speak.
• screen_reader_speak_interrupt.
• screen_reader_stop_speech.

String functions:

• string_len: string.length.
• string_replace: string.replace.
• string_left: string.substr.
• string_right: string.slice.
• string_trim_left: string.substr.
• string_trim_right: string.slice.
• string_mid: string.substr.
• string_is_lower_case: string.is_lower.
• string_is_upper_case: string.is_upper.
• string_is_alphabetic: string.is_alphabetic.
• string_is_digits: string.is_digits.
• string_is_alphanumeric: string.is_alphanumeric.
• string_reverse: string.reverse.
• string_to_lower_case: string.lower.
• string_to_upper_case: string.upper.
• string_split: string.split.
• string_contains: string.find.
• get_last_error_text: Superseded by exceptions.
• string_to_number: parse_float.
• string_compress: string_deflate.
• string_decompress: string_inflate.

String encryption/decryption:

Note that these functions don't work with existing BGT data.

• string_encrypt.
• string_decrypt.

UI functions:

• show_game_window: show_window.
• is_game_window_active: is_window_active.