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view32.txt
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1992-11-11
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View V3.2 - ANIM/ILBM Viewer
View 3.0 supports IFF ANIM OpCode 5 animations. This is the
standard ANIM format that has been adopted by the Amiga
community.
OpCode-6 Animation is my own creation. The format is exactly
the same as OpCode 5 but is QUAD buffered instead of DOUBLE
buffered. This allows the player to show 2 screens at one
time for the X-Specs Glasses. Each picture MUST be viewed for
1/60th of a second, therefore to see a 3D-Picture the viewer can
only play ANIMs at 30 frames per second. (2 pictures = 1 frame).
-------------------------------------------------------------
Updated from versions 2.0/2.1:
1. RGB file support has been removed. It proved to be too bulky
and widely unused. And I personally never used it.
2. The code has been significantly reduced. Mostly because of the
removal of RGB support.
3. A bug was fixed that made some IFF pictures display incorrectly.
4. Another bug with HIRES OVERSCAN animations has been fixed.
5. The method for positioning the display has changed AGAIN.
It was found the DCTV pictures had problems with the last method
that I used.
6. A new interface has been applied. This means a new file
requester, (with all the features of the old one plus a few more).
As well as the fact that the file information is now readable on
the screen. The key sequences are displayed view a help screen.
***********
Updated from versions 3.0 to 3.2:
1. AGAIN the method for positioning the display has been changed,
to accomodate DCTV pictures. This 'should' be the final needed change.
2. The menus have been removed when in the 'HELP' or 'ABOUT' screens.
The menus are not affected anywhere else.
3. Support for brushes has been added. A brush is any IFF picture
that is SMALLER than the default resolution for its display mode.
4. Support for ANIM brushes was added. Since ANIM brushes have an
interleave of one, double buffering required copying the buffer every
animation frame. This gets rid of flicker but may reduce the speed at
which the brush plays. I tried the brushes I have, however, and could
not detect any speed decrease. Thus I decided to double buffer the ANIM
brush for flickerless playback.
5. I Added an options menu. This menu currently holds only one item.
"Pause on entry", when turned on (CHECKED) it will cause the animation
to begin in paused mode. To start the animation playing, press the
<SPACE> key.
6. View 3.0 did not support non-looping animations correctly. The
routines that were uses in versions 2.x had a bug. I changed the program
so that these animations would work, but non-looping animations would not
play without a small -hiccup- upon reaching the end of the animation.
This version of the program now properly handles non-looping animations.
It does this by detecting the non-looping animation and adding the loop
frames magically transforming it into a looping animation.