Path: utzoo!utgpu!watserv1!watmath!att!dptg!ulysses!andante!mit-eddie!wuarchive!bcm!etaylor
From: etaylor@wilkins.iaims.bcm.tmc.edu (Eric Taylor)
Newsgroups: comp.windows.x
Subject: Re: Vector Fonts
Message-ID: <2908@gazette.bcm.tmc.edu>
Date: 27 Nov 90 17:48:46 GMT
References: <9011271415.AA26954@bruker.com>
Sender: usenet@bcm.tmc.edu
Reply-To: etaylor@wilkins.iaims.bcm.tmc.edu (Eric Taylor)
Organization: Baylor College of Medicine, Houston, Tx
Lines: 29
Nntp-Posting-Host: wilkins.iaims.bcm.tmc.edu


Here is a simplistic method for rotating text by
an arbitrary angle:

	First, create a bitmap B and write your
	text to it.

	Second, create an XYBitmap image I from B
	(via XGetImage).

	Third, create another XYBitmap Image I2.

	Fourth, for each x,y in I2:

	I2(x,y) = I(a,b)
		where
		a = x * cos(theta) - y * sin(theta)
		and
		b = x * sin(theta) + y * cos(theta)

	Finally, send your image to the screen.

	The dimensions of I2 should be big enough to
	handle the transformation. 
--
					Eric Taylor
					Baylor College of Medicine
					etaylor@wilkins.bmc.tmc.edu
					(713) 798-3776