"graying out" Icons

Scripting Issues
1

I have some character portrait icons in my game. What technique would I use to “gray” them out when a character is knocked out?
They are just images on DirectGUI buttons.

2

DirectButtons support multiple images, including one for when they are in a disabled state. See the “DirectButton” page in the manual for details and an example, and another thread I found.

3

Creating new versions that are more gray in your paint program would be the easiest thing to do, and would probably give the best-looking results.

I guess you could also try putting a 50% transparent gray card in front of it or something, if you like making things difficult.

David

4

Thx for the replies.

My app allows users to “mod” it by adding their own char portraits, so I can’t just create gray images of everything in advance (though I could for the action command icons).

I guess I’m off to gray cards.

5

I needed something like this for my game.
You can get the pixel data from your texture to a PNMImage object, make it grayscale then pass the pixel data from PNMImage to a new Texture object.

def makeGrayscaleTexture(texture):
	"""
	Takes a Texture object and returns a grayscaled version of it.
	"""
	
	# get data from Texture into PNMImage
	pnmimage = PNMImage()
	texture.store(pnmimage)
	
	# convert PNMIMage to grayscale
	pnmimage.makeGrayscale()
	
	# get data back to another Texture object
	newtexture = Texture()
	newtexture.load(pnmimage)
	
	return newtexture

Don’t get too confused with the PNMImage class name, “PNM” is there for historical reasons.

6

Thx for that. Will try it - very interesting.

Just wondering - Is there a way to change the “hue” of a texture to something else (like you can in paint programs).

I’m thinking of a slider which would allow the user to make a texture that looks red change to blue , etc.

7

You can write a shader to do this, or you can do it by processing each pixel on the CPU (via PNMImage). But there’s nothing built-in to do it for you.

David