Tricks of the Mac Game Programming Gurus/TricksOfTheMacGameProgrammingGurus.iso/More Source/Libraries/SAT 2.3b4/Demo ƒ/Bricks demo ƒ/Bricks.p

Text File | 1995-04-23 | 7KB | 238 lines

{Bricks}
{}
{Demo program for SAT 2.3, by Ingemar Ragnemalm november 1994}
{}
{The purpose of this demo is to test and demonstrate the support for what I call "resting" sprites.}
{If a sprite neither moves, changes face, overlaps a changing sprite nor changes its place in the}
{sprite list, then SAT can avoid drawing it.}
{}
{For programs where all sprites change in every frame (which is the case in many arcade games)}
{then this is not of any interest at all, and will just slow things down. For other programs, for}
{example board games, Tetris-style games etc, this technique is very useful.}
{}
{For the moment (SAT 2.3d3), you get the new system by calling SATRun2 instead of SATRun. The name}
{of SATRun2 is likely to change in the future.}
{}
{When you start Bricks, the sprites will not be initialied in order, so since VPositionSort}
{is active, they will sort during the first frames. This slows the program down for the first}
{few seconds. If this is a problem, it can be avoided by either turning off sorting or}
{creating the sprite in the proper places from the start.}
{}
{Bug note: When using "fast graphics", the cursor will cause some "mouse droppings". This is best avoided}
{by hiding the cursor and repllacing it with a SAT sprite. The "proper" way to avoid the problem is to}
{call ShieldCursor, but that will make the cursor flicker a lot.}

program Bricks;
    uses
{$ifc UNDEFINED THINK_PASCAL}
        Types, QuickDraw, Events, Windows, Dialogs, Fonts, DiskInit, TextEdit, Traps,{}
        Memory, SegLoad, Scrap, ToolUtils, OSUtils, Menus, Resources, StandardFile,{}
        GestaltEqu, Files, Errors, Devices,
{$elsec}
        InterfacesUI,
{$endc}
        SAT;

    const
        kNumBricks = 30;
    var
        brickFace: array[0..kNumBricks] of FacePtr;
        myEvent: EventRecord;
        whichWindow: WindowPtr;
        appleMenu, fileMenu: MenuHandle;
        gUseStagger, gDone, gUseFast, gAllowBackground: Boolean;
        i: integer;
        sp, found: SpritePtr;
        theSelection: Longint;
        where: Point;
        theKey: Char;
        whichPart: Integer;
        hasEvent: Boolean;

    procedure InitBricks;
        var
            i: integer;
    begin
        for i := 0 to kNumBricks - 1 do
            brickFace[i] := SATGetFace(i + 128);
    end;

    procedure HandleRestingBrick (me: SpritePtr);
    begin
    end;

    procedure HandleFollowMouse (me: SpritePtr);
        var
            mousePos: Point;
    begin
        if Button then
            begin
                GetMouse(mousePos);
                me^.position.h := me^.position.h + mousePos.h - me^.speed.h;
                me^.position.v := me^.position.v + mousePos.v - me^.speed.v;
                me^.speed := mousePos;
            end
        else
            me^.task := @HandleRestingBrick;
    end;

    procedure SetupBrick (me: SpritePtr);
    begin
        me^.task := @HandleRestingBrick;
        me^.face := brickFace[me^.kind];
    end;

    procedure SynchMenus;
    begin
        CheckItem(fileMenu, 1, not gUseStagger);
        CheckItem(fileMenu, 2, gUseStagger);
        CheckItem(fileMenu, 3, gUseFast);
        CheckItem(fileMenu, 4, gAllowBackground);
    end;

    procedure MenuSelection (theSelection: Longint);
        var
            name: Str255;
            saveport: GrafPtr;
    begin
        case HiWord(theSelection) of
            128:
                begin
                    if LoWord(theSelection) = 1 then
                        SATReportStr('Experimental SAT demo program. Resting sprites allow good speed with many sprites!')
                    else
                        begin
                            GetPort(saveport);
                            GetMenuItemText(appleMenu, 1, name);    (* get name *)
                            if OpenDeskAcc(name) = 0 then (* run the desk accessory *)
                                ;
                            SetPort(saveport);
                        end;
                end;
            129:
                case LoWord(theSelection) of
                    1:
                        gUseStagger := false;
                    2:
                        gUseStagger := true;
                    3:
                        gUseFast := not gUseFast;
                    4:
                        gAllowBackground := not gAllowBackground;
                    6:
                        gDone := true;
                end; {case MenuSelect}
            otherwise
        end;
        SynchMenus;
        HiLiteMenu(0);
    end;

begin
{CodeWarrior needs inits here}
{$IFC UNDEFINED THINK_PASCAL}
    SATInitToolbox;
{$ENDC}

    InitBricks;

    SATInit(128, 129, 512, 342);
    SATSetPortScreen;
    gUseStagger := true;
    gAllowBackground := true;
    gUseFast := false;

    for i := 0 to kNumBricks - 1 do
        sp := SATNewSprite(i, SATRand(gSAT.offSizeH - 48), SATRand(gSAT.offSizeV - 64), @SetupBrick);
    for i := 0 to kNumBricks - 1 do
        sp := SATNewSprite(i, SATRand(gSAT.offSizeH - 48), SATRand(gSAT.offSizeV - 64), @SetupBrick);

    appleMenu := NewMenu(128, stringof(char($14)));
    AppendMenu(appleMenu, 'About Bricks demo…;(-');
    AppendResMenu(appleMenu, 'DRVR');
    InsertMenu(appleMenu, 0);            { put apple menu at end of menu bar }

    fileMenu := NewMenu(129, 'File');
    AppendMenu(fileMenu, 'RunSAT/1;RunSAT2/2;Fast graphics/F;Allow background tasks;(-;Quit/Q');
    InsertMenu(fileMenu, 0);            { put file menu at end of menu bar }
    DrawMenuBar;
    SynchMenus;

    InitCursor;

    repeat
{if gUseFast then}
{ShieldCursor(gSAT.bounds, Point(0));}
        if gUseStagger then
            SATRun2(gUseFast)
        else
            SATRun(gUseFast);
{if gUseFast then}
{ShowCursor;}

        if gAllowBackground then
            begin
                SystemTask;
                hasEvent := GetNextEvent(everyEvent, myEvent)
            end
        else
            hasEvent := GetOSEvent(everyEvent, myEvent);        {or perhaps mDownMask + updateMask + keyDownMask}
        if hasEvent then
            case myEvent.what of
                updateEvt:
                    if WindowPtr(myEvent.message) = gSAT.wind.port then
                        begin
                            BeginUpdate(gSAT.wind.port);
                            SATRedraw;
                            EndUpdate(gSAT.wind.port);
                        end;
                keyDown:
                    begin
                        theKey := char(BitAnd(myEvent.message, charCodeMask));
                        if (BitAnd(myEvent.modifiers, cmdKey) <> 0) then
                            MenuSelection(MenuKey(theKey))
                        else
{DoKey(theKey, theEvent.modifiers)}
                            ;
                    end;
                mouseDown:
                    begin
                        whichPart := FindWindow(myEvent.where, whichWindow);
                        case whichPart of
                            inMenuBar:
                                begin
                                    theSelection := MenuSelect(myEvent.where);
                                    MenuSelection(theSelection);
                                end;
                            inSysWindow:
                                SystemClick(myEvent, whichWindow);
                            inContent:
                                begin
                                    found := nil;
                                    sp := gSAT.sRoot;
                                    GetMouse(where);
                                    while sp <> nil do
                                        begin
                                            if PtInRect(where, sp^.r) then
                                                found := sp;
                                            sp := sp^.next;
                                        end;
                                    if found <> nil then
                                        if myEvent.modifiers <> 0 then
                                            found^.task := nil
                                        else
                                            begin
                                                found^.task := @HandleFollowMouse;
                                                found^.speed := where; {not speed, but storage for old mouse position}
                                            end;
                                end;
                            otherwise
                        end; {case whichPart}
                    end;

                otherwise
            end;{case myEvent.what}
    until gDone;

    SATSoundShutup;
end.