original.zengl/demos/Delphi 7/01 - Initialization/demo01.dpr

program demo01;

// RU: Ýòîò ôàéë ñîäåðæèò íåêîòîðûå íàñòðîéêè(íàïðèìåð èñïîëüçîâàòü ëè ñòàòè÷åñêóþ êîìïèëÿöèþ) è îïðåäåëåíèÿ ÎÑ ïîä êîòîðóþ ïðîèñõîäèò êîìïèëÿöèÿ.
// EN: This file contains some options(e.g. whether to use static compilation) and defines of OS for which is compilation going.
{$I zglCustomConfig.cfg}

{$R *.res}

uses
  {$IFDEF USE_ZENGL_STATIC}
  // RU: Ïðè èñïîëüçîâàíèè ñòàòè÷åñêîé êîìïèëÿöèè íåîáõîäèìî ïîäêëþ÷àòü ìîäóëè ZenGL ñîäåðæàùèå íåîáõîäèìûé ôóíêöèîíàë.
  // EN: Using static compilation needs to use ZenGL units with needed functionality.
  zgl_main,
  zgl_screen,
  zgl_window,
  zgl_timers,
  zgl_utils
  {$ELSE}
  // RU: Èñïîëüçóÿ ZenGL â êà÷åñòâå áèáëèîòåêè(so, dll èëè dylib) íóæåí âñåãî îäèí çàãîëîâî÷íûé ôàéë.
  // EN: Using ZenGL as a shared library(so, dll or dylib) needs only one header.
  zglHeader
  {$ENDIF}
  ;

var
  DirApp  : UTF8String;
  DirHome : UTF8String;

procedure Init;
begin
  // RU: Òóò ìîæíî âûïîëíÿòü çàãðóçêó îñíîâíûõ ðåñóðñîâ.
  // EN: Here can be loading of main resources.
end;

procedure Draw;
begin
  // RU: Òóò "ðèñóåì" ÷òî óãîäíî :)
  // EN: Here "draw" anything :)
end;

procedure Update( dt : Double );
begin
  // RU: Ýòà ôóíêöèÿ íàçåìåíèìà äëÿ ðåàëèçàöèÿ ïëàâíîãî äâèæåíèÿ ÷åãî-ëèáî, ò.ê. òî÷íîñòü òàéìåðîâ îãðàíè÷åíà FPS.
  // EN: This function is the best way to implement smooth moving of something, because accuracy of timers are restricted by FPS.
end;

procedure Timer;
begin
  // RU: Áóäåì â çàãîëîâêå ïîêàçûâàòü êîëè÷åñòâî êàäðîâ â ñåêóíäó.
  // EN: Caption will show the frames per second.
  wnd_SetCaption( '01 - Initialization[ FPS: ' + u_IntToStr( zgl_Get( RENDER_FPS ) ) + ' ]' );
end;

procedure Quit;
begin
 //
end;

Begin
  // RU: Êîä íèæå çàãðóæàåò áèáëèîòåêó åñëè ñòàòè÷åñêàÿ êîìïèëÿöèÿ íå èñïîëüçóåòñÿ.
  // EN: Code below loads a library if static compilation is not used.
  {$IFNDEF USE_ZENGL_STATIC}
  if not zglLoad( libZenGL ) Then exit;
  {$ENDIF}

  // RU: Äëÿ çàãðóçêè/ñîçäàíèÿ êàêèõ-òî ñâîèõ íàñòðîåê/ïðîôèëåé/etc. ìîæíî ïîëó÷èòü ïóòü ê äîìàøåíåìó êàòàëîãó ïîëüçîâàòåëÿ, èëè ê èñïîëíÿåìîìó ôàéëó(íå ðàáîòàåò äëÿ GNU/Linux).
  // EN: For loading/creating your own options/profiles/etc. you can get path to user home directory, or to executable file(not works for GNU/Linux).
  DirApp  := utf8_Copy( PAnsiChar( zgl_Get( DIRECTORY_APPLICATION ) ) );
  DirHome := utf8_Copy( PAnsiChar( zgl_Get( DIRECTORY_HOME ) ) );

  // RU: Ñîçäàåì òàéìåð ñ èíòåðâàëîì 1000ìñ.
  // EN: Create a timer with interval 1000ms.
  timer_Add( @Timer, 1000 );

  // RU: Ðåãèñòðèðóåì ïðîöåäóðó, ÷òî âûïîëíèòñÿ ñðàçó ïîñëå èíèöèàëèçàöèè ZenGL.
  // EN: Register the procedure, that will be executed after ZenGL initialization.
  zgl_Reg( SYS_LOAD, @Init );
  // RU: Ðåãèñòðèðóåì ïðîöåäóðó, ãäå áóäåò ïðîèñõîäèòü ðåíäåð.
  // EN: Register the render procedure.
  zgl_Reg( SYS_DRAW, @Draw );
  // RU: Ðåãèñòðèðóåì ïðîöåäóðó, êîòîðàÿ áóäåò ïðèíèìàòü ðàçíèöó âðåìåíè ìåæäó êàäðàìè.
  // EN: Register the procedure, that will get delta time between the frames.
  zgl_Reg( SYS_UPDATE, @Update );
  // RU: Ðåãèñòðèðóåì ïðîöåäóðó, êîòîðàÿ âûïîëíèòñÿ ïîñëå çàâåðøåíèÿ ðàáîòû ZenGL.
  // EN: Register the procedure, that will be executed after ZenGL shutdown.
  zgl_Reg( SYS_EXIT, @Quit );

  // RU: Óñòàíàâëèâàåì çàãîëîâîê îêíà.
  // EN: Set the caption of the window.
  wnd_SetCaption( '01 - Initialization' );

  // RU: Ðàçðåøàåì êóðñîð ìûøè.
  // EN: Allow to show the mouse cursor.
  wnd_ShowCursor( TRUE );

  // RU: Óêàçûâàåì ïåðâîíà÷àëüíûå íàñòðîéêè.
  // EN: Set screen options.
  scr_SetOptions( 800, 600, REFRESH_MAXIMUM, FALSE, FALSE );

  // RU: Èíèöèàëèçèðóåì ZenGL.
  // EN: Initialize ZenGL.
  zgl_Init();
End.