Essentially there are two kinds of images, raster and vector. A raster image is a created from a bitmap, the instructions to create a shape by printing specific dots on the page or lighting up specific pixels on the screen. A vector image is instead created from a set of instructions on how to draw the shape, such as "Pen down; forward 30 units; right 90 degrees; forward 30 units..." or "Place start of text at these XY coordinates, use this font, make it bold and print the following text string..."
Since a vector image on your screen is essentially the output from a little program on how to draw the image, and the graphic is that program; it's easy to make changes to the program to change what it shows on the screen. But the raster graphic is like a fixed snapshot of the image and all you can do is stretch it, shrink it, change the colour... Think of the difference between looking at a document in Word, and looking at a scanned-in image of that document in Photoshop. Bj ____ � The WDVL Discussion List from WDVL.COM � ____ To Join wdvltalk, Send An Email To: mailto:[EMAIL PROTECTED] Send Your Posts To: [EMAIL PROTECTED] To change subscription settings to the wdvltalk digest version: http://wdvl.internet.com/WDVL/Forum/#sub ________________ http://www.wdvl.com _______________________ You are currently subscribed to wdvltalk as: [email protected] To unsubscribe send a blank email to [EMAIL PROTECTED]
