FX support for maps

[kevin]

This piccy is of another feature i've been wanting to implement for some time now.  Which is adding support FX maps.  This allows FX maps to be rendered to system memory buffers.  Anything in system memory you can then run alpha effects over them.  Obviously  This places the rendering burden squarely on your cpu's shoulders.    While some effects and screen modes are optimized for MMX,  many aren't at this time.  

  Anyway, there's still a little bit to flesh out (namely there's no transparent support), but this should give a bit of cpu muscle those an avenue to throw some serious visuals around.  The bellow is the map with a alpha shape masked over it.  It's clocking about 70-90fps on my 800mhz duron.    


 PB 1.11 code

PlayBASIC Code: [Select]

; =======================
; Create Lighting Shape
; =======================
   
  LIghtShape=GetFreeShape()
  CreateConvexShape LIghtShape,100,5
  ResizeShape LIghtShape,50,50
  t=GetFreeShape()
  CreateConvexShape t,300,30
  MergeShape t,LIghtShape
  DeleteShape t   




;   SetFPS 90

;   Makebitmapfont 1,$ffffff


   `CReate a Series of Tiles To make the blob Animation.
   Frames=10
   BlockSize=64
; Create the Animated blocks 
   Block_Image=CreateBlocks(BlockSize,frames)  


; Create a Map with provision For 2 level maps To be created using it's Blocks
   Thismap=NewMap(2)
   
; Import the above Image created into our Map as BLocks
   MakeMapGFX ThisMap,Block_image,BlockSize,BlockSize,frames+1,RGB(0,0,0)


; Prepare the Block graphics for FX rendering.  This Allows Maps to be
; drawn to the images converted to FX format.  
   PrepareFXMap ThisMap
   

; =========================
; Create 3 Animations 
; =========================

   MaxAnims=6

   Create_Map_Anims(ThisMap,MAxAnims,Frames)


  

; CREATE A LEVEL 
   Constant z=$80000000

   Width=100
   height=100

   CreateLevel ThisMap,1,Width,height
   For ylp=0 To Width
   For xlp=0 To height
     PokeLevelTile ThisMap,1,xlp,ylp,z Or RndRange(1,MaxAnims)
   Next xlp
   Next ylp
   
; SET THIS LEVEL As Transparent + animated.. 
;  LevelTransparent ThisMap,1,0
   LevelAnimated ThisMap,1

   sw=getscreenwidth()
   sh=getscreenheight()
   
   FXScreen=NEwImage(sw,sh)
   PrepareFXIMage FXscreen
   Rendertoimage FXscreen
     
   createcamera 1

   rendertoscreen   
   Do   

  capturetoscene
  clsscene
     DrawMap thisMap,1,0,0
  DrawCamera 1

     RendertoIMage FXScreen
     inkmode 1+32
;     circlec sw/2,sh/2,200,1,$800000     

     ink rgb(155,85,155)
     drawshape  LIghtShape,sw/2,sh/2,2
     
     inkmode 1
     rendertoscreen
     inkalpha 0.5+(Sin(angle#)*0.5)         

     Angle#=WrapAngle(angle#,1)
     RotateShape LightShape,angle#,1.5+Cos(angle#)     
     

;     BlitImageClr(FXScreen,0,0,ClrRGB)   
     drawimage FXscreen,0,0,0
     
     if upkey() then MoveCamera 1,0,-5
     if Downkey() then MoveCamera 1,0,5
     if Rightkey() then MoveCamera 1,5,0
     if Leftkey() then MoveCamera 1,-5,0
     
     CenterText GetScreenWidth()/2,0,"Rendering Animated FX Map"

     UpdateMapAnims Thismap
    
     Sync
  Loop

   End
   
   


Function BlitImageClr(ThisImage,X#,y#,ClrRGB)
   select GetSCreenDepth()
  case 16,32
     BlitMode=1
     blitimage ThisIMage,x#,y#,transparentflag,Blitmode,ClrRGB,0,0   
  case 24
     oldsurface=getsurface()
     drawimage ThisIMage,x#,y#,transparentflag
     rendertoimage ThisImage
     cls ClrRgb
     rendertoimage Oldsurface    
   Endselect
EndFunction








Function CreateBlocks(BlockSize,frames)  
; Create a Image to Use to Store out Blob tiles upon
   Map_Image=NewImage(BlockSize*(Frames+1),BlockSize)

; CReate the set of Blob 
   For lp=0 To frames
  i=NewImage(BlockSize,BlockSize)   
     c=$0142f8

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[kevin]

How about some "water"  :)

All thanks to FX maps and vector shapes

[Ian Price]

Very nice! Now we can create SNES style lighting (where character etc. is in a dark room, with only a torch and ghosts for company :))

[kevin]

Yeah you could..

i've got another old idea on the to-do list (that i'm working on atm)  is to blit/light combine blitter.

This would allow you take/render a coloured light map and merge them together during the blit.   It's a pretty heavy work load effect though.

[Ian Price]

I think I know what you're trying to achieve - the GBA does this very well (see CastleVania for examples). It's a nice effect :)

[kevin]

yeah It's certainly not a new idea.    anyway,  each R/B/G of the light map is applied to corresponding pixel of the image your blitting.  R/G/B component of the light map is used/applied as  the intensity of image pixels R/G/B.   Not a cheap effect, and probably a 32bit only effect.