[Freetype] Re: [Gltt-discuss] help with openGL (bitmap vs filled polygons)

[Gerard Lanois]

--- Wallace Chigona <address@hidden> wrote:
> Hi guys,
> I am rendering Freetype fonts using openGL and I am trying different
> libraries(including some bits which I am developing myself).  
> 
> I am mainly interested in rendering the characters as Bitmaps (for high
> quality), "filled-polygons" (for speed, I am storing them as display
> lists).   Initally I render the characters using "filled-polygons",i.e I
> am changing the character a lot (i.e rotating etc) and once I get the
> final picture, I want to replace the "filled polygon" characters with
> the high quality bitmap characters.  In which case, the size of the
> respective "filled-polygon" character must be equal to the size of their
> bitmaped counterparts.
> 
> With Bitmaps, all I need is to specify the character size, i.e
> FT_Set_Char_size and I get a character which I want. However, with
> "Filled-polygons" (or outlines) I have to use scaling (glScalef).   My
> question then is, how canI make sure the sizes of the two are equal?

Set up your projection and viewing matrices so that 1 unit in world
space equals 1 pixel in window space.  If you are drawing your 
characters in an arbitrarily defined 3-space, you will first need
to project their locations into window space (probably by using
gluProject()).

-Gerard


__________________________________________________
Terrorist Attacks on U.S. - How can you help?
Donate cash, emergency relief information
http://dailynews.yahoo.com/fc/US/Emergency_Information/