Questions tagged [csg]

Constructive Solid Geometry. The practice of intersecting one volume with another and performing logical AND, NAND, OR, XOR operations to determine a resultant volume. It is used as an umbrella term also for CPG, Constructive Planar Geometry, which describes similar operations in 2D.

Filter by
Sorted by
Tagged with
0 votes
1 answer
41 views

How to prevent sun light from passing through the walls and flickering when navigating in viewport?

I am new to UE5. I am using a geometry brush to create an inner box and an outer box. The inner is set to brush type ‘subtractive’, resulting in a simple room like this: Then I create several windows ...
storycg's user avatar
0 votes
0 answers
57 views

Strange edge seams when subtracting a cylinder from other shapes

I'm just starting with UE 5.1 and I'm noticing weird behavior when I use cylinder to subtract from other shapes. I tried adding more sides to make it smoother but these weird artifacts still persist ...
Wiizl's user avatar
  • 101
0 votes
1 answer
1k views

Unity Cutting a hole in mesh

I've set myself a stupid task, that I didn't solve couple years back, again. I've got few meshes with normals pointing inside. Caves. Like mostly circular rooms and tunnels that should connect them. ...
zORg Alex's user avatar
  • 129
0 votes
0 answers
87 views

Playcanvas with CSG

I want to use library csg.js with Playcanvas game engine to make some curves but don't know how to implement CSG (constructive solid geometry) in Playcanvas
grzesiekmq's user avatar
0 votes
0 answers
201 views

Hi,Dynamically modifying meshes in Unity3D

I'm working in Unity3D and I want to remove sections from a mesh at runtime similar to the idea of bombs removing sections of walls. In 3D modelling software this is a pretty standard Boolean ...
JLC's user avatar
  • 53
3 votes
1 answer
278 views

Fixing T-Junction artifacts in a BSP Editor

I'm starting a little BSP engine, and have begun implementing Brush CSG. Currently I represent my brushes as the enclosed volume of surface planes (like old idTech 3 maps), with a cache for each face ...
mseddon's user avatar
  • 151
2 votes
0 answers
335 views

Clipping drawn mesh by arbitrary volume

I'm trying to create a visual effect where an arbitrary part of the main scene is either clipped out by or cropped to an arbitrary volume. That is to say, I might want to draw just the area of the ...
John Laxson's user avatar
-2 votes
1 answer
409 views

good and free 3D modeling programs for implement into Unity [closed]

I'll make some objects that are not easy to make in Unity, but on my previous question Making holes in 3D objects (Unity) was there an answer that said that I can make it whit an other 3D modeling ...
H. Pauwelyn's user avatar
1 vote
2 answers
3k views

Section cut through (solid) geometry

I'm looking for image based (screen space) technique to render section cuts through arbitrary (solid) geometry. I found and studied image based CSG (Kirsch 05 / OpenCSG) but I found it to be perhaps a ...
skrat's user avatar
  • 173
6 votes
2 answers
2k views

What are the time-efficiency characteristics of these voxel data structures?

Real-time, high-resolution voxel raycasters tend to use one of the following optimising data structures in order to achieve interactive frame rates. What are the pros and cons to these, and what other ...
Engineer's user avatar
  • 29.4k
55 votes
3 answers
55k views

How are voxel terrain engines made?

A few days ago I found something called voxel terrains and I think that they're pretty cool. But I don't know anything generating them. Do you model it in your modeling software or use something like ...
Daniel's user avatar
  • 3,451
8 votes
2 answers
3k views

Implementing 2D CSG (for collision shapes)?

Are there any simple (or well documented) algorithms for basic CSG operations on 2D polygons? I'm looking for a way to 'add' a number of overlapping 2D collision shapes. These may be convex or ...
bluescrn's user avatar
  • 3,397