I am currently immersed in a three.js project that involves selecting two boxes from a board and drawing a straight line to connect them. Once this is done, the goal is to highlight all the boxes that the line intersects. My main challenge at the moment is figuring out how to identify which boxes the line crosses paths with.
Any assistance on this matter would be greatly appreciated - whether it be a code snippet, relevant links, recommended reading material, or mathematical formulas.
It appears that you are in need of utilizing a Raycaster for what you have described.
To achieve this, establish your ray by defining its position and direction vector, followed by employing the intersectObjects method on the objects to obtain a collection of the boxes intersected by the ray.
For solving this particular problem, I found that utilizing Bresenham's line algorithm was essential in order to accurately track all the various points along the line.
Discovered at https://www.geeksforgeeks.org/bresenhams-line-generation-algorithm/
A big thank you goes out to Ivan and Diarmid for their assistance, even though my code was quite messy.
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