ld21-ESCape/src/Functions.pbi

; This file holds all the functions If it gets too big,
; we can split it in categories

; *****************************************************************************
; * Tileset
Procedure InitGraphics()
  GFXLogo = LoadSprite(#PB_Any, "../data/gfx/logo.bmp")
  GFXTileset = LoadSprite(#PB_Any, "../data/gfx/tileset01.bmp")
EndProcedure

; TODO: Make this dynamic
Procedure InitTileset()
  Define i.i, j.i, count.i
  count = 0
  For i=0 To 5
    For j=0 To 5
      
      Tileset(count)\ID = CopySprite(GFXTileset, #PB_Any)
      ClipSprite(Tileset(count)\ID, #TILE_SIZE*j, #TILE_SIZE*i, #TILE_SIZE, #TILE_SIZE)
      
      Tileset(count)\Type = #TILESET_TYPE_FLOOR
      Select count
        Case 0
          Tileset(count)\Type = #TILESET_TYPE_PLAYER
        Case 2
          Tileset(count)\Type = #TILESET_TYPE_WALL
        Case 3
          Tileset(count)\Type = #TILESET_TYPE_SOLID
        Case 4
          Tileset(count)\Type = #TILESET_TYPE_GRASS
      EndSelect
      
      count+1
    Next
  Next
EndProcedure

Procedure LoadMap(Filename.s)
  ; Extract the map data from the XML file
  If LoadXML(0, Filename) And XMLStatus(0) = #PB_XML_Success
    Define *Node.i = XMLNodeFromPath(MainXMLNode(0), "/map/layer/data")
    Define MapData.s = GetXMLNodeText(*Node)
    If CreateRegularExpression(0, "\d{1,2},?")
      Dim Tiles.s(0)
      Define NumFound.i = ExtractRegularExpression(0, MapData, Tiles())
      Define i.i, X.i, Y.i
      X = 0
      Y = 0
      
      CreateFile(0, "mapcheck.txt") ; File stuff for checking the map loader
      For i=0 To NumFound-1
        TileMap(X, Y)\TileNumber = Val(RTrim(Tiles(i), ","))-1
        TileMap(X, Y)\X = X
        TileMap(X, Y)\Y = Y
        
        ; Walls get 4 health
        If TileMap(X, Y)\TileNumber = 2
          TileMap(X, Y)\Health = 4
        EndIf
        
        WriteString(0, StrU(TileMap(X, Y)\TileNumber+1)+",")

        If X = #MAP_WIDTH-1
          X = 0
          Y+1
          WriteStringN(0, "") ; do new line
        Else
          X+1
        EndIf
      Next
      CloseFile(0)
    EndIf
  EndIf
EndProcedure

; Shadowmap
Procedure CalculateShadow()
  Define X.i, Y.i
  Define MapX.i, MapY.i, Strength.i, Centercheck.i, CentercheckX.i, CentercheckY.i
  
  For X.i=-#SHADOW_RADIUS To #SHADOW_RADIUS*2
    For Y.i=-#SHADOW_RADIUS To #SHADOW_RADIUS*2
      MapX = Player\X + X
      MapY = Player\Y + Y
      
      CentercheckX = X
      If CentercheckX < 0
        CentercheckX * -1
      EndIf
      
      CentercheckY = Y
      If CentercheckY < 0
        CentercheckY * -1
      EndIf
      
      If CentercheckX > CentercheckY
        Centercheck = CentercheckX
      Else
        Centercheck = CentercheckY
      EndIf
      Centercheck = #SHADOW_RADIUS - Centercheck;
      
      Strength = (255 / #SHADOW_RADIUS) * (Centercheck)

      If MapX >= 0 And MapY >= 0
        If ShadowMap(MapX, MapY)\Strength < Strength
          ShadowMap(MapX, MapY)\Strength = Strength
        EndIf
      EndIf
    Next
  Next
EndProcedure

Procedure DrawShadowtile(strength.i, x.i, y.i)
  Box(#TILE_SIZE*x, #TILE_SIZE*y, #TILE_SIZE, #TILE_SIZE, RGBA(0, 0, 0, 255-strength))
EndProcedure

Procedure GenerateShadowLayer()
  Define X.i ,Y.i
  
  CompilerSelect #PB_Compiler_OS
    CompilerCase #PB_OS_Linux
      ShadowOfDarkness = CreateImage(#PB_Any, 800, 600, 32|#PB_Image_Transparent)
      StartDrawing(ImageOutput(ShadowOfDarkness))
    CompilerDefault
      StartDrawing(ScreenOutput())
  CompilerEndSelect
  
  DrawingMode(#PB_2DDrawing_AlphaBlend)
  For X.i=0 To Cam\Width
    For Y.i=0 To Cam\Height
      DrawShadowtile(ShadowMap(X+Cam\X, Y+Cam\Y)\Strength, X, Y)
    Next
  Next
  StopDrawing()
EndProcedure 

Procedure DrawShadow()
  CompilerSelect #PB_Compiler_OS
    CompilerCase #PB_OS_Linux
      StartDrawing(ScreenOutput())
      DrawImage(ImageID(ShadowOfDarkness), 0, 0)
      StopDrawing()
    CompilerDefault
      GenerateShadowLayer()
  CompilerEndSelect
EndProcedure

; Map itself
Procedure DrawTile(number.i, x.i, y.i)
  Define id.i
  
  If number = #TILESET_TYPE_WALL And TileMap(x, y)\He