Distort image shape

[Peter Morris]

Hi all

I need to take an input image and produce an output image which is distorted
to fit 4 Points. So the 4 input points would be

(0,0)
(Width - 1, 0)
(Width - 1, Height - 1)
(0, Height - 1)

And the 4 output points would be anything the user decides, so that I can
have weirdly shaped output (e.g to look rotated + perspective).

I've Googled but can't find anything to do what I need. Does anyone have
any suggestions?


Pete

 

[Chris Taylor]

Hi,

Well, if you are using WPF you can use an ImageBrush and map the texture
coordinates from the image to the new shape provided by the user.

For windows forms GDI+ you will probably need to implement custom texture
mapping routine. Take a look at the following as a starting point
http://www.gamers.org/dEngine/rsc/pcgpe-1.0/texture.txt

Hope that helps