[Closed] Bitmap Transform

Ziboo

Dec 03, 2008 1:03 pm

Hi everybody,

I have 2 little questions about bitmap transform.

Is it possible to desaturate a bitmap by MaxScript ?

Is it possible to blur a bitmap by MaxScript ?

It’s because i use a script to make a virtual viewport, and i render my actual viewport as a bitmap to it, and i want to see it in greyscale or blured (for lighting is cool to have this vision).

Thanks

Rob

6 Replies

LoneRobot

Dec 03, 2008 1:03 pm

are you using max 2008 or up? you can just use a color correction map in the environment map slot. you can perform many image adjustments and this will show up in vpt background.

Ziboo

Dec 03, 2008 1:03 pm

i’m using max 9…

That isn’t for render but for realtime. I’m using directX shader with vertexColor in my scene.

Here is the script i’m using for duplicate my viewport :

rollout t "Virtual viewport" width:200 height:200
  (
  bitmap w "" width:200 height:200
  
  fn virtualViewport =
  (
  w.bitMap = gw.getViewportDib()
  --colors = getPixels w.bitmap [0,0] 200
  --print colors
  )
  
  on t open do
  (
  virtualViewport()
  registerRedrawViewsCallback virtualViewport
  )
  
  on t close do
  (
  unRegisterRedrawViewsCallback virtualViewport
  )
  
  on t resized size do
  (
  x = gw.getWinSizeX()
  y = gw.getWinSizeY()
  w.width = size.x
  w.height = size.y
  if size.x > x do
  (
  t.width = x
  w.width = x
  )
  if size.y > y do
  (
  t.height = y
  w.height = y
  )
  )
  
  )
  createDialog t style:#(#style_resizing,#style_minimizebox,#style_titlebar,#style_border,#style_sysmenu)

handiklap

Dec 03, 2008 1:03 pm

Do you mean something like this?:

(0.3pixelVal.x + 0.59pixelVal.y + 0.11*pixelVal.z)

That will return a pixel’s luma value. So just assign that value to pixelVal.x, pixelVal.y, and pixelVal.z and you’ve got a grayscale. Since you’re doing this to a bitmap, remember to read entire rows of pixels at a time, as it is more than twice as quick as doing it one pixel at a time.

As for blurring, I’d assume some research on convolution algorithms would get you what you need.

kees

Dec 03, 2008 1:03 pm

To do it in realtime, you would have to use Viewport shaders (scene shaders).
Max does support them, though they are poorly documented and don’t always work.

But blurring and desaturate should be possible.