Jump to content

Search the Community

Showing results for tags 'line'.



More search options

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


Forums

  • Commander X16 Forums
    • Introductions
    • X16 Discussion Lounge
    • X16 Help & Support Lounge
    • Off-topic Lounge

Categories

  • Official Software
  • Official Docs
  • Community Downloads
    • Games
    • Productivity Apps
    • Graphics Apps
    • Audio Apps
    • Demos
    • Networking Apps
    • Dev Tools
    • Tutorial Apps
    • Misc Apps

Find results in...

Find results that contain...


Date Created

  • Start

    End


Last Updated

  • Start

    End


Filter by number of...

Joined

  • Start

    End


Group


About Me

Found 2 results

  1. Vertical Bar Scroller View File This is a demo to try out how far VERA can be pushed: it is quite hard to have vertically (independently) scolling bars using VERA. What this demonstrates is that it is in possible. But only just. It turns out I had to use 80 sprites in combination with a lot of LINE-interrupts. Here is what I did: - Create a 64 pixel by 5*64 pixel colored data rectangle (in this example filled with 4x4 pixel squares) - Place 80 sprites (of 64x64 pixels) from left to right, overlapping mostly, but showing the 4 left pixels of each sprite - These sprites are (vertically) grouped in pairs, so that each pair is placed one pixel lower than the pair next to it on the right - The data address of each sprite (where they get their colored pixels from) are initially set to the same point (they all start with an vertical offset of 0) - For each low-res LINE-interrupt (that is: 240 times per frame) we do the following: - move one pair of sprites (that are *just* out of view) 64 pixels down - change the data address so that it matches it individual vertical-offset - At the end of all the LINE-interrups (after the 240 lines) we do the following: - Adjust the vertical offsets with the individual change-per-frame numbers - Move all sprites back to the top, with negative y-coordinates (according to their offsets) It runs a maximum fps: every frame there is an update. Warning: this demo contains (what amounts to) flashing / strobing effects. # Known issues - There are small horizontal lines visible at certain places. This is probably because the LINE-interrupt code is not fast enough # Comparing hardware with emulator I think this demo will probably not work (exactly) the same on real hardware. It's probably a good way to check whether the emulator is accurate (for certain aspects of the VERA board). # To Compile: cl65 -t cx16 -o VBS.PRG -l vbs.list vbs.asm # To Run: x16emu.exe -prg VBS.PRG -run Regards, Jeffrey Submitter Jeffrey Submitted 02/24/21 Category Demos  
  2. Version 1.0.0

    22 downloads

    This is a demo to try out how far VERA can be pushed: it is quite hard to have vertically (independently) scolling bars using VERA. What this demonstrates is that it is in possible. But only just. It turns out I had to use 80 sprites in combination with a lot of LINE-interrupts. Here is what I did: - Create a 64 pixel by 5*64 pixel colored data rectangle (in this example filled with 4x4 pixel squares) - Place 80 sprites (of 64x64 pixels) from left to right, overlapping mostly, but showing the 4 left pixels of each sprite - These sprites are (vertically) grouped in pairs, so that each pair is placed one pixel lower than the pair next to it on the right - The data address of each sprite (where they get their colored pixels from) are initially set to the same point (they all start with an vertical offset of 0) - For each low-res LINE-interrupt (that is: 240 times per frame) we do the following: - move one pair of sprites (that are *just* out of view) 64 pixels down - change the data address so that it matches it individual vertical-offset - At the end of all the LINE-interrups (after the 240 lines) we do the following: - Adjust the vertical offsets with the individual change-per-frame numbers - Move all sprites back to the top, with negative y-coordinates (according to their offsets) It runs a maximum fps: every frame there is an update. Warning: this demo contains (what amounts to) flashing / strobing effects. # Known issues - There are small horizontal lines visible at certain places. This is probably because the LINE-interrupt code is not fast enough # Comparing hardware with emulator I think this demo will probably not work (exactly) the same on real hardware. It's probably a good way to check whether the emulator is accurate (for certain aspects of the VERA board). # To Compile: cl65 -t cx16 -o VBS.PRG -l vbs.list vbs.asm # To Run: x16emu.exe -prg VBS.PRG -run Regards, Jeffrey
×
×
  • Create New...

Important Information

Please review our Terms of Use