P. S. Just noticed that dropbox player does a rather poor job displaying those videos so it might be better to download them before watching. > On 2020-07-30, at 17:19, silverdr_at_wfmh.org.pl wrote: > > >> On 22/07/2020 19:41, silverdr_at_wfmh.org.pl wrote: >>> smart usage of the sequencer can give you inexpensive movable visuals. >> Can you explain that in a bit more detail? > > Here is an example : > > https://www.dropbox.com/s/9jerbdwpl6q56ty/IMG_0694.MOV?dl=0 > > in BASIC :-) > > It shows a full-width "sprite" but it doesn't have to be full-width. It can be of any size down to 8x1 pixels. > > It's always been possible to do some split-screen effects but this is different in a few ways: > > - it is much more accurate (single cycle) horizontally and can be activated multiple times per raster _line_ > > - bitmap data is not bound to screen position so the place the desired graphics will get displayed can be chosen arbitrarily, which can be noticed on the video above > > - moving bitmap data within a block of VASYL RAM is fast. Not nVidia Titan/GDDR6 type of fast ;-) bu still [*](videos below) > > Combining the three gives a possibility to create multiple movable, animated objects (hardware sprites can still be used on top) as long as [lack of] compositing is not an issue. > > > * - hires bitmap text output and scrolling: > > invoked once per frame: > https://www.dropbox.com/s/ur7x2nbxaic07vx/hires_scroll_once_per_frame.mp4 > > invoked cotinuously: > https://www.dropbox.com/s/kd77duyqf1amvi6/hires_scroll_unrestricted.mp4 > > -- > SD! > > > > -- SD!Received on 2020-07-30 18:00:33
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