FloodFill Function

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sinisrus
Posts: 262
Joined: Tue Apr 21, 2015 5:43 pm

FloodFill Function

Post by sinisrus » Sat Mar 30, 2019 1:33 am

Hello,

I have problem for port of code C# FloodFill to Hollywood not work :-/
Help me please

(Source: https://lodev.org/cgtutor/floodfill.html)

Origine Code:

Code: Select all

//The scanline floodfill algorithm using stack instead of recursion, more robust
void floodFillScanlineStack(int x, int y, int newColor, int oldColor)
{
  if(oldColor == newColor) return;

  int x1;
  bool spanAbove, spanBelow;

  std::vector<int> stack;
  push(stack, x, y);
  while(pop(stack, x, y))
  {
    x1 = x;
    while(x1 >= 0 && screenBuffer[y * w + x1] == oldColor) x1--;
    x1++;
    spanAbove = spanBelow = 0;
    while(x1 < w && screenBuffer[y * w + x1] == oldColor)
    {
      screenBuffer[y * w + x1] = newColor;
      if(!spanAbove && y > 0 && screenBuffer[(y - 1) * w + x1] == oldColor)
      {
        push(stack, x1, y - 1);
        spanAbove = 1;
      }
      else if(spanAbove && y > 0 && screenBuffer[(y - 1) * w + x1] != oldColor)
      {
        spanAbove = 0;
      }
      if(!spanBelow && y < h - 1 && screenBuffer[(y + 1) * w + x1] == oldColor)
      {
        push(stack, x1, y + 1);
        spanBelow = 1;
      }
      else if(spanBelow && y < h - 1 && screenBuffer[(y + 1) * w + x1] != oldColor)
      {
        spanBelow = 0;
      }
      x1++;
    }
  }
}
And my code hollywood (not work)

Code: Select all

Stack={}

Function Stack:Push(X,Y) ; Ajouter une valeur

Local Pos={X=X,Y=Y}

InsertItem(Self,Pos)
EndFunction

Function Stack:Pop() ; Supprimer une valeur
IF (ListItems(Self)=0) THEN Return("NULL")
Local Pos=RemoveItem(Self,ListItems(Self))
Return(Pos.X,Pos.Y)
EndFunction

Function Stack:Size() ; Taille de la pile
IF (ListItems(Self)=0) THEN Return("NULL")
Return(ListItems(Self))
EndFunction

Function Stack:Clear() ; Vider la pile
IF (ListItems(Self)<>0) THEN Self={}
Return(ListItems(Self))
EndFunction

/********************/

;The scanline floodfill algorithm using stack instead of recursion, more robust
Function floodFillScanlineStack(x, y, newColor)

  oldcolor = ReadBrushPixel(PICTURE,X,Y)
  oldcolor = HexStr(oldcolor) debugprint(oldcolor)

  w=35
  h=35


  IF (ToNumber(oldColor) = ToNumber(newColor)) THEN RETURN()

  Stack:Push(x,y)
  WHILE(ToNumber(Stack:pop())<>"NULL")

    x1 = x
    WHILE((x1>=0) AND ReadBrushPixel(PICTURE,x1,y) = ToNumber(oldColor)) DO x1=x1-1 
    x1=x1+1

    spanAbove, spanBelow = 0, 0
    WHILE(x1 < w AND ReadBrushPixel(PICTURE,x1,y) = ToNumber(oldColor))
      X,Y = Self:Pop()
      WriteBrushPixel(PICTURE,x1,y,newColor)
      IF(NOT spanAbove AND y > 0 AND ReadBrushPixel(PICTURE,x1,y-1) = ToNumber(oldColor))
      Stack:Push(x1,y-1)
      spanAbove = 1
      ELSEIF(spanAbove AND y > 0 AND ReadBrushPixel(PICTURE,x1,y-1) <> ToNumber(oldColor))
      spanAbove = 0
      EndIF

      IF(NOT spanBelow AND y < h - 1 AND ReadBrushPixel(PICTURE,x1,y+1) = ToNumber(oldColor))
      Stack:Push(x1,y+1)
      spanBelow = 1
      ELSEIF(spanBelow AND y < h - 1 AND ReadBrushPixel(PICTURE,x1,y+1) <> ToNumber(oldColor))
      spanBelow = 0
      EndIF
      x1=x1+1
    WEND

  WEND

EndFunction


SamuraiCrow
Posts: 222
Joined: Fri May 15, 2015 5:15 pm
Location: Ft. Collins, Colorado USA

Re: FloodFill Function

Post by SamuraiCrow » Sat Mar 30, 2019 10:27 pm

Self is only defined in a method. FloodFillScanlineStack() is not a method but a function so quit using self:pop() and use stack:pop instead.

sinisrus
Posts: 262
Joined: Tue Apr 21, 2015 5:43 pm

Re: FloodFill Function

Post by sinisrus » Sun Mar 31, 2019 4:48 pm

Thank you i solved my problem work new

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