Animation Pum Feb 1 1991
The Animation Icon's Pum has many parameters and switches which
control the actual rendering of the animation.
Here is a rundown of the buttons and numericals, with some
hints and explanations (as well as the AREXX numerical numbers).
The renderer separates the Actual time represented by a frame
from the physical frame rendered. In the usual case, a frame represents
the positions of all the vectors and the conditions of all the set
variables and ephemera at a particular SMPTE time. A single physical
frame can accumulate and average a number of frames generated at
different SMPTE times, usually separated by fractions of a normal
frame's time. Rendering increments the time until the End Time
is reached, which is not rendered.
#1 Start Time The first SMPTE time
#2 End Time The last SMPTE time
#3 Rend/Frame How many "logical" frames are averaged to make
a physical frame (i.e. IFF ILBM file)
#4 MB Denom This specifies the increment of the SMPTE time
after each frame renders. It is the denominator
in the fraction "1/d frames". Thus, 4 means the
SMPTE time increases by 1/4 frame (there are
#5 Option 1 Chooses the renderer .. see "renderers"
#6 MB Bias If 0, then time advances evenly by 1/MB denom.
If 1, time sloshes toward the end of the
frame: 1-(1/(1-n))² is being used.
If 2, the time increment is halved, which tightens
up the blur.
#7 Slices (Unused.. for rendering in strips when not enough
#8 Flags This is a bit string of some options and importance.
1 - Use bits 2 and 4 to set Amiga display options
These options are automatically set when this bit is
off, but only for the usual Amiga screen sizes.
Therefore, it is used in overscan rendering.
2 - force Interlace
4 - force Hires
8 - Random Dither flag
16 - Used with 8 (=24), forces "coherent random
dither" for better compression
32 - Changes B&W rendering from Black on white
to white on black.
64 - Overexposes color by 2: for burned-in blurs
128 - Calls VFrame Arexx macro when frame has been
#9 Width In Pix -- frame width in pixels
#10 Height In Pix -- frame height in pixels
#11 Aspect Width -- idealized pixel width - chosen for convenience
#12 Aspect Height -- idealized pixel Height - chosen for convenience
( the following buttons are not available from AREXX)
Set AN Default -- sets the previous numbers as a default on
new creation of an AN - basically after
clearing the workspace.
The following buttons preset the aspects, widths,heights and flags
Lo/Non preset for Lo-Res, non-interlaced
Hi/Non preset for Hi-Res, non-interlaced
Lo/Int preset for Lo-Res, interlaced
Hi/Int preset for Hi-Res, interlaced
Overscan is more-or-less 352 by 240
Lo/Non Ov preset for Lo-Res, non-interlaced overscan
Hi/Non Ov preset for Hi-Res, non-interlaced overscan
Lo/Int Ov preset for Lo-Res, interlaced overscan
Hi/Int Ov preset for Hi-Res, interlaced overscan
You can set the width or height to any number, but for the usual
renderers, the width MUST be a multiple of 16. As you change these
numbers, the aspect ratio of the View will respond accordingly, as
rendered in the workspace.
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