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Start of a Graphics Tut
By: OlDosLover Date: May 1, 2012, 9:18 am
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Hi all,
Here's the start of a graphics tutorial comparing the QBasic
ideas to the new QB64 ideas. Criticisms and ideas welcomed.
[quote]
Welcome to this tutorial. Here i will attempt to help the
newcommer understand the legacy QBasic graphics
ideas compared to the new QB64 graphic commands and how to use
them. I will use some terms to describe things and
define these terms next.
TERMS
Legacy = QBasic or QB45
QB64 = The new underscored keywords
Graphic surface = a set sized screen of pixels at a certain
amount of colours
Pages = a number of associated graphic surfaces all the same
size and colour depth
Colour Depth = maximum number of colours that can be displayed
on a graphics surface
Statement = a BASIC keyword used to invoke a command with
correct parameters
Monitor = computer screen
Mode = a particular legacy screen
Handle = Identifing label (a name)
LEGACY SCREEN's
In the old DOS QBasic a user could only create fixed legacy
screens in size and colour depth. In QBasic a
user would create this one graphic window by using the statement
SCREEN with a number. For example the main graphic
screens that QBasic could create are:
SCREEN 7
SCREEN 9
SCREEN 12
SCREEN 13
The resolutions of these old screens are:
gopher.createaforum.com:70 /forums/technogamedevforum/p/22:47: port field too long