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Questions tagged [mesh]

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A collection of vertices, edges and faces that defines the shape of objects

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Improve cube rendering performance in lwjgl

I've been coding a minecraft-like game in lwjgl using cubes. I've reached a point where I can render 6 chunks of blocks before it starts lagging. I've searched online for optimizations and one of the ...
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23 views

How can I create a good physics colliders for these models in Unity3D

I need to make a 3D colliders in Unity with those forms. I don't want to use any Asset Store asset if it's possible. There are two models: both are cylinders but they have some deformations (see image ...
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25 views

filter camera output by mesh

(skip to edit for the actual problem) I have a simple plane mesh generated via script (has arbitrary shape). I want the shader to discard (set to black) all pixels that aren't passing through that ...
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Unity 3D - CSG / Geomodding meshes runtime

Although I'm not very advanced in Unity, I've been looking into CSG/boolean mesh deformation to see what's possible. I want to break a hole in basic wall meshes at the point the player clicks on, ...
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1answer
80 views

How to make a custom 3d view cone that mixes orthographic and perspective cameras

I'm trying to make a camera that displays objects the same height no matter the distance, but still changes width relative to distance. Similar to having an orthographic view vertically and a ...
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How to ensure Unity does not rearrange the sub-meshes of a mesh on import?

having a bit of a head scratcher problem here. I have my artist's making multiple unique meshes in Maya that contain 3 materials. Each material is assigned to a sub-mesh in a specific order. This ...
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How do I play multiple animations at once with an MonoGame skinned mesh?

I am working with the SkinnedMesh from this tutorial. I am at the point where I want to let my character run (which already works), but when I press the punch key on my keyboard, I only want the upper ...
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Get Skeletal Mesh Vertex Position in Niagara

I have a custom HLSL node in a simulation stage in Niagara. One of the input variables to this node is of type Skeletal Mesh and I want to get the position and normal of a given vertex on that ...
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How can I achieve this “stroked lines” effect?

I have a collection of arbitrary vertices and edges that are connected, but which do not necessarily form triangles. These vertices and edges mostly fall along a flat plane, but have some height ...
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26 views

How can I detect and hide faces inside an object when combining two or more meshes?

I am trying to make a game where the player can make vehicles out of parts. To apply proper physics to the vehicles, like drag and buoyancy, I would like to get the outer hull of the various parts ...
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1answer
129 views

Procedurally generated mesh makes weird shapes

I'm developping a procedural terrain generator in Unity 2020.3, using Sebastian Lague's tutorials and knowledge i've gathered through college projects. The heightmap looks just fine, and i had no ...
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How can I calculate the inertia tensor of a hollow object defined by a triangle mesh?

I want to calculate the mass, center of mass, and inertia tensor of player created objects. Some of the objects will be hollow instead of solid. I am creating a closed triangle mesh for their object. ...
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27 views

How to optimize Floor Meshes with different material in unity

I have several meshes (floor tiles) that consist of unique materials as they have different textures. I see that it is taking too many batches and it has around 100m vertexes. Is there any way to ...
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Dynamic UI Canvas on Mesh

I have dynamically generated images in WorldSpace Canvas and I need to put them somehow on shield that crashes. Is it possible tu put that canvas on mesh shader texture or render it on texture? How ...
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2answers
109 views

How mesh transformation works under the hood

We can look at the most popular engines like Unity and Unreal engine (maybe Godot and other). As far as I understand (at least I would do this), we store the original mesh, and then for every change (...
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Can you help me resolve a bug in mesh collision code?

I have entities which walk along a 3D mesh. I move the units along their x,z axis, and every frame I update their y-position according to the quad or triangle they are standing on, using Barycentric ...
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1answer
52 views

Set object rotation according to the outer vertex in unity

I am able to get the outer vertices of a mesh using this and able to generate cubes on outer edges of the mesh. Here is my code: ...
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Attempting to remove extra “edges” from truncated icosahedron lead to excessively global concequences

I need a truncated icosahedron. Blender lets me do that with add -> mesh -> math function -> regular solid (assuming the extra plugin is installed.) So far so good. However, the mesh that ...
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2answers
73 views

How do you have the clothing mesh hide the body mesh underneath?

How do you have the clothing mesh hide the body mesh underneath, to prevent odd patches of body from sticking out in tighter modular clothing? Is there some sort of shader trick that can have the ...
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110 views

Create Mesh in gap between tiles (in Unity3D)

I am loading two kinds of tiles (meshes in tile format) in Unity, both are placed in the environment correctly but there is a gap between these two tiles (see the picture below). I want to fill this ...
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30 views

How to create fallout intensity on a generated mesh in Unity?

So I was able to generate a circle mesh in Unity to basically see the other characters when they are inside of it, and hide the characters when they are outside of it, and partially hide and show the ...
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1answer
60 views

Unexpected result when generating world with 2 perlin noises

I try to generate a world with a temperature and an humidity noise to generate biome based on the y values of the two. I take the y values and round them on a 33 base for the humidity and 25 for the ...
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1answer
99 views

Building meshes conforming to terrain deformation

I have an uneven terrain on which the player is supposed to build buildings. For most structures I can just fudge the foundations, have them extend through the terrain. For roads, pipes, tracks and ...
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1answer
141 views

Unity: How can I find the center position of a particular triangle?

I need to face an object from a central point directly through any one of many triangles which are faces on an icosphere whose position is centered on that point. Is there a way to get the center ...
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1answer
11 views

Unity mesh only rendering one set of triangles

I've been using Unity3D to procedurally generate terrain with Perlin Noise and I've come across a problem where the mesh that I've constructed only renders one set of triangles. The following is my ...
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1answer
44 views

Why does my material look blotchy on this mesh?

This is a generative mesh - wireframe looks like this Here's the material But the shaded object looks like a tie dye tshirt I've no idea what settings are causing it to look like this. These are ...
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Skeleton bone in incorrect spot in-game yet, blender rig, skeleton mesh and physics asset are all correct and behave properly

I've made a custom character and rigged it in blender. Then exported/imported into ue4. It behaves properly in the PHAT and the skeleton mesh looks fine and it all behaves properly in the simulations. ...
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Road Intersection mesh generation

For the last month I was learning about meshes and how procedurally generate them. For what I need it looks very straightforward. For my little app I planning to have a road tool (very simple), user ...
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Are there drawbacks to resizing mesh renderer bounds?

I had a problem yesterday where some of the meshes were not visible. I figured out the problem, which was that the mesh renderer bounds were not in the cameras field of view. So, in order to make the ...
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257 views

How to make 3D snake with procedural mesh in Unity

Im currently learning Unity3D and I would like to recreate the old Nokia game "Snakes" (example video: https://www.youtube.com/watch?v=FXg3jVG-tXs&ab_channel=aantv, play it at 1:30 and ...
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Unity mesh - delete quads

I'm trying to delete quads in unity. The code here creates a procedural grid. Setting the gridSizeX to 5 and gridSizeY to 3, creates a 6 by 4 grid. I want to delete the first row of quads when I click ...
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1answer
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Complex mesh (created in Blender) is not overlapping when rendered in Monogame (XNA)

community. Just started playing with Monogame and stuck with a quite simple, but still unanswered issue, at least I couldn't find any answer. The model rendered in Monogame (XNA) is not overlapping ...
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Mesh filter component is removed from prefab [Unity]

I am trying to procedurally generate a city with cubes. I generate the cubes' location, size and textures randomly with an external program and I save to a txt. I created a script in C# that loads ...
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1answer
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Unity, interior poly always missing in clothing

I've modeled interior polygons but for some reason they do not show up in Unity. I've tried changing import settings for normals to both calculate and import... How do you have a tshirt's interior ...
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141 views

How can I do real-time mesh deformation?

I have a very simple problem: I have a icosphere mesh rendered with OpenGL and I want to deform/stretch it. But it has to be a real-time process because the deformation is generated when user drag'n ...
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Update to the ROAM Large Scale Mesh LOD Method

I'm looking to create very large planetary terrain meshes. The most efficient and researched methodology I've seen so far was the ROAM 2.0 Method. However, this was written and published in 2005. Does ...
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1answer
2k views

How to randomly generate biome with perlin noise?

I want to generate a procedural world using perlin noise. As expected, my terrain is generating with a repetitive patern. I'd like to add biomes, zones separated with higher or lower amplitude to ...
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1answer
24 views

Generate plane with script missing triangles

I am trying to do a simple script to generate a plane from a script by creating a new mesh. After trying it, it seems like some of the triangles aren't showing up. I checked if they were in the list ...
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Some submeshes of my gameobject dissapear when I set the bindposes

Well, I'm trying to animate some Source models imported into Unity3D using this Unity-Source-Tools library: https://github.com/lewa-j/Unity-Source-Tools To animate a Mesh generated by this tool I need ...
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1answer
51 views

Blendshapes in Unity vs Blender

I have a model from a package that has existing Blendshapes that work fine. I'm a bit of a Blender newb, though. I'm trying to add a Blendshape for spikiness to a cube model. It's early WIP, but it ...
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Can I “unmerge” merged meshes UE4?

I set up my character to be modular, by following the UE4 docs. I used the code at the bottom of the page to implement mesh merging functionality. It does work well, I can merge meshes runtime. I use ...
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1answer
123 views

How can I make a custom mesh class in Unity?

I'm doing something in Unity where I need to specify the position and orientation of vertices with two Vector4s, and they're not just position and normal vectors. I'...
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1answer
291 views

Optimizing 3D tile-based geometry

For my game, I have a tool that lets me quickly create map geometry. You can see a (albeit early version) demo of the tool here. The main problem with the tool is that even a semi-large map can EASILY ...
2
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1answer
725 views

How to support importing .uasset files in game for content creators(UE4)?

I would like to support importing clothes(as SkeletalMeshes) and props(as StaticMeshes) as uasset files into game for content creators, which obviously have not been packaged with the game. Basically ...
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1answer
54 views

Prevent mesh generation function from blocking other functions from running

So, I have a procedural mesh generation system with chunks that load in and generate as the player walks into a nearby cell, and get removed when the player walks out. When each set of 9 cells is ...
2
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1answer
69 views

Reducing adjacency bookkeeping work in constrained Delaunay triangulation

I'm using the Sloan algorithm for constraining a generated Delaunay triangulation. This primarily consists of edge flipping for the edges that overlap the constrained edges. In order to flip an edge, ...
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How can I create a mesh of triangles made from the vertices of a polygon and contained within that polygon?

I'm trying to programatically generate a mesh, given the vertices of a polygon, which is contained within that polygon. For example, starting with these points: I would want to generate a mesh ...
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1answer
379 views

Which Terrain LOD algorithm should I use for super large terrain?

My game needs a terrain, the requirements are: Freely Zoom in & zoom out, like GoogleEarth. Max resolution when zooming in ~100 meter, Max range when zooming out ~2000km (a whole country scale). ...
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Dynamically Generated Mesh Not Visible Unless In Wireframe Mode

I'm trying to create a dynamic mesh using ArrayMesh but my mesh isn't visible unless I turn on wireframe debug mode. Here is a minimal example of a plane mesh consisting of 2 triangles (this script is ...
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1answer
208 views

Given a triangleIndex how do you find the global position of a mesh vertex - Unity

For Unity's mesh system - Given a triangleIndex how do you find the global position of a mesh vertex (of a meshfilter on a gameobject)?

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