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  Highlighting a tile  (Read 479 times)
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Offline Agro
« Posted 2012-11-03 22:47:48 »

Right now I'm working on an isometric tile-based game, and I wanted to figure out how to make tiles get "highlighted" when my mouse gets dragged over it. I know one way is to create separate tiles that are brighter than the original, but is there any way to do it integrated in Java?

Online theagentd
« Reply #1 - Posted 2012-11-03 23:18:47 »

Just draw another transparent tile over the selected tile to make it "glow" or so. You can use additive blending if you want, that might give you a more glowy effect.

Myomyomyo.
Offline GabrielBailey74
« Reply #2 - Posted 2012-11-04 03:22:30 »

You should add a if statement inside of your for loop of the tiles checking if the mouse X / Y is inside of the tile, than adjust it properly:

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      /* Basic for loop to render 2D tiles? */
      int tileSize = 32;
      int width = 400;
      int height = 400;
      for (int x = 0; x < width; x += tileSize) {
         for (int y = 0; y < height; y += tileSize) {
            if (Mouse.X >= x && Mouse.X <= x + width && Mouse.Y >= y && Mouse.Y <= y + height) {
               // Mouse is inside the tile, change the color of it.
           } else {
               // Mouse is not inside the tile, so render it normally.
           }
         }
      }


Hope it helps some mate, like you said you're using isometric tiles (I'm not familiar with isometric tiles), but I'm guessing you'd have to translate the coords Cranky

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Offline Agro
« Reply #3 - Posted 2012-11-04 04:07:52 »

Yep, I've worked on that the whole entire day. But actually, it finds the tile that is hovered over, and makes that selected. Also, I used theagentd's suggestion and it worked perfectly.

If you're interested in my isometric-screen space equations, here it is : https://gist.github.com/4009942

Online theagentd
« Reply #4 - Posted 2012-11-04 04:14:17 »

If you're interested in my isometric-screen space equations, here it is : https://gist.github.com/4009942
Those might come in useful for someone. You should post them in a new thread in the Shared Code forum.

Myomyomyo.
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