Questions tagged [convex-hull]

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Convex hull doesn't properly cover points

Recently I've been trying to create a sphere in my project. I start by creating a Fibonacci sphere through this code and draw with glDrawArrays ...
• 47
1 vote
175 views

What is the minimum number of points in a convex hull in most engines?

A convex hull shape in a 3D game engine defined by vertices needs at least 4 points in order to have volume, since that would make it a tetrahedron. However, some game engines may support fewer points,...
• 369
1 vote
145 views

Creating outline from a collection of points following the concavity

I am trying to create an outline from a collection of points. I found this solution for Convex Hull. I specifically picked this implementation: https://en.wikibooks.org/wiki/Algorithm_Implementation/...
64 views

How to find the smallest distance between two 4-sided objects in 3D space?

I was wondering if there is a way to calculate the smallest distance between two 4-sided objects in space. In this specific scenario, the only information I know about both of them are the 4 points ...
• 157
43 views

Having trouble with btGeometryUtil::isPointInsidePlanes

I'm in the process of parsing a BSP file to create btConvexHullShape objects for each brush. I've seen a few examples of how to do this on Github and they all use the getVerticesFromPlaneEquations ...
• 111
1k views

Looking for collision detection algorithms for broad and narrow phases between non-convex polyhedrons

I have some experiences on particle system simulation (namely DEM - Discrete element method), in which an individual particle with realistic shape (convex and non-convex) is approximated by gluing 3D ...
• 101
1k views

Point vs Convex Hull

I'm trying to implement a simple collision response to a point intersecting a convex hull. So far I can detect if the point is inside the hull. But now I want a collision response that translates ...
• 565