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Everything posted by jvas
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International Karate RC and RCX cartridge conversion - all in one!
jvas replied to Wilheim's topic in Atari 8-Bit Computers
Would be fun to add backgrounds from other games like Bruce Lee, Pitfall, Alley Cat etc... -
I suppose RastaConverter and RastaConverter + eXtended memory
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Congratulations for the good choice of colors, nice character design and fluent movement!
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It is said, that "it's just an early working version"
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Player/Missile overlay "impossible" in highres mode
jvas replied to patjomki's topic in Atari 5200 / 8-bit Programming
Is it the same with "inverse" graphics? -
DoubleBack: open participation contest entry thread
jvas replied to Mark2008's topic in Atari 5200 / 8-bit Programming
When counting points that are on the right of the object: if a point is next to the previous point we found in the list, then it it doesn't count. In the example above only the leftmost point of the horizontal green line counts only. Don't know whether I am clear or not -
DoubleBack: open participation contest entry thread
jvas replied to Mark2008's topic in Atari 5200 / 8-bit Programming
I found these two articles: 1. Check if a point is inside a polygon: https://www.geeksforgeeks.org/how-to-check-if-a-given-point-lies-inside-a-polygon/ 2. Which is based on the algorythm of determinig of the intersection of two segments: https://www.geeksforgeeks.org/check-if-two-given-line-segments-intersect/ We treat the objects in the game as points. For example we can say, that if the center of an object is looped then the object itself is looped. We can determine if a new loop is created. Only in this case we have to go on. In the video it seems that not only intersections but when two points next to each other also creates a loop: The coordinates of the head is the same as one of the other point of the snake Or the coordinates of the head is next to the one of the other point of the snake We can separate all points of the "snake" which are part of a loop (need to find out how, more than one loops are possible): These are all points from the head toward the tail till we reach the point determined in #2 The 1st algorithm becames simple them: An object is in a loop, if there are odd number of snake points (determined in #3) whose x coordinate is bigger then the object's x coordinate and the y coordinate is the same as the object's y coordinate There are some tough cases like this: -
DoubleBack: open participation contest entry thread
jvas replied to Mark2008's topic in Atari 5200 / 8-bit Programming
Maybe first we should try to find out how to find closed polygons and what is inside them. That's why I wanted to record the points of direction changes. -
DoubleBack: open participation contest entry thread
jvas replied to Mark2008's topic in Atari 5200 / 8-bit Programming
First thought: For the tail I would maintain 2 ordered lists: - the first list would contain the points (coordinates) in which the head changes direction - the second list would contain the ordered list of direction changes This way we can "play back" the movement of the head: 1. the tail starts from the last point (and removes it from the list) 2. and starts moving in the direction that is at the last position of the directions' list (and removes it) 3. it moves till it reaches the last coordinates in the points' list (or reaches the head's position if nothing in the list) and go back to step one Seems simple, but needs a buffer management with the length of the buffer, first and last position. We can use the list of points (with the position of the head and tail) to check which is inside the polygon or is it a closed polygon at all. -
Atari PC1 ISA expansion adapter - J2 & J8 pinout
jvas replied to oracle_jedi's topic in Atari ST/TT/Falcon Computers
Wouldn't it be more convenient if there was a daughter board with more than one ISA connectors outside of the case and connected to the internal board with a ribbon cable? -
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Unicorns season: Prince of Persia for the A8!
jvas replied to rensoup's topic in Atari 8-Bit Computers
Same color, what is the problem? -
How many of you own an Atari Hotz Box?
jvas replied to Clint Thompson's topic in Atari ST/TT/Falcon Computers
Wish I had the manual... -
JoeIron
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It says "Owned", but not actually installed on the dashboard. ??? It seems it is part of the new OS update:
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Novice how to: partition M.2 → Atari Storage+Win10+Batocera
jvas replied to ManOfScience's topic in VCS PC-Mode Discussion
Is the image of the original OS available somewhere to download? All the links to it I found seems to be dead... -
How many of you own an Atari Hotz Box?
jvas replied to Clint Thompson's topic in Atari ST/TT/Falcon Computers
It seems to me I'll be the owner of the main unit. At least I paid for it.... -
Has anybody compiled the video player for the XEL-CF interface?
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Actually DVI has analog pins, but still makes no sense.
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Hi, Can somebody tell me what is missing? I'm trying to set pixels, but nothing happens on screen (just a black/blank one). Thanks in advance! Cheers, Jozsi test1.pas
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It is easier to attach a SIO2SD and the 1050 to your atari at the same time. You can mount any ATR image with SIO2SD and copy that to an FDD with the 1050
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Yes, I already did that, but moved since then. It may be confusing if submitting more then once...
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How to update shipping address?
