Sprite draw to Sprite?

[zxtunes.com]

possible to draw sprites in other sprites?

I have a polygon. I can change its shape (distortion and size), that would set up an even rectangle for the image of the projector.
And I want to display this polygon rotating about its axis in the sprite.

[zxtunes.com]

Example:

Code: Select all

   ClearScreen(#black)
   StartDrawing ( SpriteOutput( polygon ) )

             DisplayTransparentSprite( texture, 0, 0 ... )

   StopDrawing()

   TransformSprite ( Polygon, .... )
    DisplayTransparentSprite( Polygon, .... )

as a result Sprite "texture" not drawn in the sprite "Polygon", but is drawn on the main screen.

[void]

Unfortunately, startdrawing() is only for the 2d drawing library, so spriteoutput() is only relevant for things like line(), box(), etc.

I've requested in the past for a mechanism to render sprites onto a sprite as the target buffer, but it isn't currently possible with the PB libraries.

[citystate]

there used to be a command UseBuffer() that would substitute a sprite for the screen, but it's been depreciated - you might get more bang for your buck using an image rather than a sprite, and then draw it onto a sprite as required

[netmaestro]

GrabDrawingImage, a relatively new command (v4.4 iirc) is what you want:

Code: Select all

InitSprite():InitKeyboard()

OpenWindow(0,0,0,640,640,"Press ESC to exit...",#PB_Window_ScreenCentered)
OpenWindowedScreen(WindowID(0),0,0,640,640)

CreateSprite(0, 256,256)
CreateSprite(1, 512,512)

StartDrawing(SpriteOutput(0))
  DrawingMode(#PB_2DDrawing_Gradient)
  BackColor($000099)
  FrontColor($dd0000)
  LinearGradient(0, 0, 0, 256) 
  Box(0,0,256,256)
StopDrawing()

; We want sprite 0 drawn on sprite 1, so step 1: Grab the drawing image
StartDrawing(SpriteOutput(0))
  this = GrabDrawingImage(#PB_Any,0,0,256,256)
StopDrawing()

; Step 2: Draw the grabbed image to sprite 1:
StartDrawing(SpriteOutput(1))
  Box(0,0,512,512,RGB(255,255,223))
  DrawImage(ImageID(this),128,128)
StopDrawing()

Repeat
  While WindowEvent():Wend
  ClearScreen(0)
  DisplaySprite(1, 60,60)
  FlipBuffers()
  ExamineKeyboard()
Until KeyboardPushed(#PB_Key_Escape)

[void]

GrabDrawingImage, a relatively new command (v4.4 iirc) is what you want:

That approach doesn't look like it lets you make use of any of the features available to sprites, such as rotation, scaling, blending modes, etc.

[Pot Noodle]

That approach doesn't look like it lets you make use of any of the features available to sprites, such as rotation, scaling, blending modes, etc.

It would if you then converted it to a 3D sprite!