{This file contains additional macros that work with stacks.}


procedure CheckForStack;
begin
  if nPics=0 then begin
    PutMessage('This macro requires a stack.');
    exit;
  end;
  if nSlices=0 then begin
    PutMessage('This window is not a stack.');
    exit;
  end;
end;


macro 'Add Slice [A]';    begin CheckForStack; AddSlice end;
macro 'Delete Slice [D]'; begin CheckForStack; DeleteSlice end;
macro 'First Slice [F]';  begin CheckForStack; SelectSlice(1) end;
macro 'Last Slice [L]';   begin CheckForStack; SelectSlice(nSlices) end;

macro '(-' begin end;


macro 'Smooth';
var
  i:integer;
begin
  CheckForStack;
  for i:= 1 to nSlices do begin
    SelectSlice(i);
    SetOption; Smooth;
  end;
end;

macro 'Invert';
var
  i:integer;
begin
  CheckForStack;
  for i:= 1 to nSlices do begin
    SelectSlice(i);
    Invert;
  end;
end;

macro 'Make Surface Plot MovieÉ';
var
  i,OldStack,NewStack:integer;
  N,PlotWidth,PlotHeight:integer;
  ScaleFactor:real;
  OneToOne:boolean;
begin
  RequiresVersion(1.50); 
  CheckForStack;
  SaveState;
  OldStack:=PicNumber;
  N:=nSlices;
  PlotWidth:=GetNumber('Surface Plot Width:',300);
  PlotHeight:=GetNumber('Surface Plot Height:',PlotWidth);
  SetNewSize(PlotWidth,PlotHeight);
  MakeNewStack('Stack');
  NewStack:=PicNumber;
  SelectPic(OldStack);
  for i:= 1 to N do begin
    SelectSlice(1);
    SurfacePlot;
    SelectAll;
    Copy;
    Dispose;
    SelectPic(NewStack);
    if i<>1 then AddSlice;
    Paste;
    SelectPic(OldStack);
    DeleteSlice;
  end;
  Dispose; {OldStack}
  RestoreState;
end;

macro 'Make Expression MovieÉ [E]';
{
Requires the Expression 3.0b filter plug-in, which
is available by anonymous FTP from zippy.nimh.nih.gov,
in the /pub/nih-image/plug-ins directory.
}
var
  width,height,nframes,i:integer;
begin
  RequiresVersion(1.56);
  width:=GetNumber('Width:',200);
  height:=GetNumber('Height:',width);
  nframes:=GetNumber('Number of Frames:',50);
  SetNewSize(width,height);
  MakeNewStack('Stack');
  MakeNewWindow('Temp');
  CallFilter('Reset');
  for i:=1 to nframes do begin
    SelectWindow('Temp');
    CallFilter('Expression 3.0');
    SelectAll;
    Copy;
    SelectWindow('Stack');
    if i<>1 then AddSlice;
    paste;
  end;
  SelectWindow('Temp');
  Dispose;
end;

macro 'Animate Stack';
var
  i,delay:integer;
begin
  RequiresVersion(1.56);
  CheckForStack;
  i:=0;
  delay:=0.1;
  repeat
    i:=i+1;
    if i>nSlices then i:=1;
    Wait(delay);
    SelectSlice(i);
    if KeyDown('shift') then delay:=1.5*delay;
    if delay>1 then delay:=1;
    if KeyDown('control') then delay:=0.66*delay;
    if KeyDown('option') then beep;
    ShowMessage('delay=',delay:4:2);
  until button;
end;