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Hexagonal tile highlighting/picking

Started by wraith811 Jan 2, 2013 at 3:53 AM 1 replies 1.9k views

Original Post

Jan 2, 2013 at 3:53 AM

I've been trying to learn how to highlight a hexagon when the cursor is over a hexagonal tile. I've read several articles that explain it using a "mouse map" texture image that helps to determine if the cursor/mouse is within a hexagon on a tile map. However, I can't seem to get it to work. I originally tried using the tutorial from Kurt Jaeger's xna resources but its mainly for isometric tiles. I then found an explaination on gamedev.net but my puny brain can't seem to comprehend it. If someone could help explain this concept of using a "mouse map" or maybe an easier method would be great. Unfortunately, it won't let me upload my solution. If you need to see my project, let me know a way of posting it. Thanks.

I forgot to mention, this is in XNA 4.0

TomKQT

Jan 2, 2013 at 11:46 AM

Are we talking about 3D or 2D?

By 2D I mean that you see the tiles as exact hexagons on the screen. If it is the case then it's just some relatively simply maths, as can be seen for example here http://gdreflections.com/2011/02/hexagonal-grid-math.html

wraith811

Jan 2, 2013 at 4:29 PM

Tom KQT,

Thank you for your help. Yes, it is 2D. I'll take a look at the article. My only concern is that my hexagons are 2d texture images so the math may not work quite as well as with a 2d primitive using math to display it. The other flip side is that I'm inexperienced at applying some of the math concepts to xna. If all else fails, I may just use a simple circle or rectangle check and leave it at that.

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