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Mat
07-17-2002, 05:25 AM
Hi,

I produced pictures from my OpenGL scene and I make a movie with BMP2AVI a shareware that a lot of you advise me.

I would like to know if an other freeware or shareware exist that do the same with JPEG files..

Thanks a lot
MAt

DonDan
07-18-2002, 07:17 AM
Mat, could you explain me how did you dump those images?

Mat
07-18-2002, 11:48 PM
Hey,

I can explain this to you but I use Java and Java Advance imaging for producing the pictures...

For the OpenGL part, You have to use glReadPixel(x,y,width,height,format,type,pixels[]) function that will read the pixels of the scene and put the result in an array.. After you must use this array for producing the pictures.. I know how to do it in Java but not in C++.. but you can find a lot of examples in the archives of the forum for C++ code.

glReadPixels where:
(x,y) angle inferior left of the area to read
width height the dimsension of the area
format, the element type (GL_RGB, GL_RGBA...)
type the type of data (GL_BYTE,
GL_UNSIGNED_BYTE)
and pixel a byte array of the pixels read..

the size of this array (for a byte array) will be(width*height*Element type size (3 for RGB 4 for RGBA..))

Now if you work also with Java tell me I will give you the code I used for producing the pictures !!!

Regards
Mat