Virtual pets and Sim games community

Would you like to become a member of the most successful virtual pets and sim games community on the internet? Virtual pet list has been opened since 2011 and we've been providing game developers(owners), artists, players and writers with the most relevant, up to date, quality and in depth content covering the entire online pet games, sim games and browser based games industry. So, if if you're interested in discussing virtual pet games, game development or online sims, our flourishing forum is perfect for you. Our sneak peeks forum is designed for new owners to showchase their upcoming in development games.

You can learn how to manage, make money and learn all aboutonline pet game management or discuss the best ways of developing a sim game. Find new sites to play in our online games directory. Currently, there's a total of over 80 pet games and over 70 sim games in our directory. So, feel free to post a review, a comment, or leave a like on any online game that we have listed. If you like a game that we have listed, please help us out by sharing it on social media.

  1. An upcoming virtual pet site that's owned by one of our moderators, Pepper-headIn icey them pet game Kaylune, a virtual pet site Breed online pet eliyo
    Managed Web Hosting by Liquid Web breed horses on this very active sim game

    Browse our Online Games Directory
    Admin and webmasters community - Browser games Beastkeeper
    Gaming Reinvented

Canvas Cycling in HTML5?

Discussion in 'Programming General' started by CometTheMicroraptor, Jun 30, 2012.

  1. Okay, so I'm curious about something, and this is entirely for future reference, so don't get too excited just yet. I also apologize if I'm not articulating myself very well, since I know very little about how this works.
    origins virtual pet site origins kickstarter
    Now, I happened upon this site a while ago now, and it remains to be something that absolutely stuns and baffles me every time I look at it.
    The artist says that he and another programmer used HTML5 to make these images, which are like traditional canvas cycling pixelled images seen in older games.

    This is the site in question:
    I highly recommend going through it to see what I'm trying to describe here. Basically, though, they are images (with pleasant accompanying sounds, I might add) that have certain pixels cycling in color to create animations (most of which you see is precipitation and moving water).

    Now, out of curiosity... is anybody on here able to do that? I've mentioned before that a friend of mine and myself want to open a site that is slowly turning into something exclusively pixel based and we'd love to have our maps be like this. However, we'd love to have different weather patterns and light cycles happening on them as well (not that these would cycle but I think you get what I mean), and I'd love to know how it works or if anybody can help me do this so that I don't have to make the animations myself, as that is incredibly complicated. It just seems incredibly fascinating.
    origins virtual pet site origins kickstarter

    Your banner/button can be located here for an entire month or year, please see our advertising on virtualpetlist thread for more information.

  2. I'm trying to wrap my head around how they are doing this. I assumed that this was done simply with images, and just cycling through them on the canvas to create the animation. But the way you described it sounds a little bit more complicated. Do you have a link to them describing this method?
  3. A better way is array operations on imagedata objects. I'm working on an example.
  4. The following example uses imagedata manipulation:

    Programming this demo reinforced my preference of flash over HTML5 (CanvasPixelArray doesn't support the regular Array methods, meaning I had to use for loops to set each pixel value individually, adding extra code and time)

    On the bright side, it's still more flexible than using images (suppose, for example, that you wanted to slow down the animation. With this method, you can simply change a single number) :)
  5. It's done by using one image and changing the colours of the palette and blending them with the original colour. If you click "Show Options »" you can see the colours changing.

    How does that compare to this?
  6. And how do you think they show / change the colors?

    Basically you use a loop to check each set of four values (the data of each pixel) to see if it matches the target color, and if it does you set the values to 255, 255, 255, 0.


    That being said, I will concede that they were actually using images for the animation.
    #7 Dart, Jul 1, 2012
    Last edited: Jul 1, 2012
  7. On an 8-bit animation system you achieved these effects by directly manipulating the color palette used to draw an image. This provided very fast color cycling animations, where waves of color moved across an image. I used to have a screensaver that acted just like that. By changing only part of the palette you could make only part of the image animate.

    In the JS implementation you can't change the actual color palette, so the author makes an object representing the palette, with cycles defined for each color, and then updates the canvas image as the colors change. For speed he redraws only the individual pixels whose colors have changed. He doesn't ever test the pixel's current color, just changes the palette.

Share This Page

  • About VPL, the #1 forum for pet sites, and online sims

    We are an online community of passionate artists, writers, game developers and general users who have a vested interest in virtual pet games, game dev & sim games. Our members are from different backgrounds and yet we group together with one goal, to ensure our pet games, game dev, and sims forum is one of the best!
  • Like VPL on Facebook!

  • Support VPL

    If you love our community and you'd like to help us cover our monthly costs, we'd greatly appreciate it if you could help us out by supporting us! If you can't donate, we totally understand. You can also support us by using our social media sharing buttons or by writing about us on other sites.

    Donate to VPL!