A method typically used for determining what the user selected.

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31
votes
5answers
7k views

In 2D, how do I efficiently find the nearest object to a point?

I have a sizable game engine and I'd like a feature for finding the nearest of a list of points. I could simply use the Pythagorean theorem to find each distance and choose the minimum one, but that ...
7
votes
2answers
8k views

How do you determine which object/surface the user's pointing at with lwjgl?

Title pretty much says it all. I'm working on a simple 'lets get used to lwjgl' project involving manipulation of a rubik's cube, and I can't figure out how to tell which side/square the user's ...
5
votes
2answers
2k views

Ray Picking Problems

I've read so many answers on here about how to do Ray Picking, that I thought I had the idea of it down. But when I try to implement it in my game, I get garbage. I'm working with LWJGL. Here's the ...
2
votes
2answers
293 views

Assigning a different texture based on picking

I'm making a game using XNA. I have some simple objects like cube and sphere, and I would like to change the texture of one face of these objects based on picking. That is, when the cursor is over ...
1
vote
1answer
84 views

Pixel Picking vs Raycasting

I was recently introduced to a way of picking in OpenGL known as pixel picking (or color picking). From my understanding, how this is done is that the scene is rendered to the back buffer with a ...
1
vote
2answers
603 views

3D picking for mouse move event

I implemented color picking recently and I would like to use it as kind of highlight when mouse is over an object but I am concerned about performance. Color picking requires whole frame to be drawn, ...
-2
votes
2answers
527 views

Picking a tile in an Iso Engine

I have developed an iso engine for a farm game. In general it works fine, but the problem is that it is not always accurate when pressing the tiles, so the tile I wanted to select is not the one ...