Questions tagged [mesh]

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

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38 views

why does my mesh render on top of UI?

I've got some UI elements and a 3D mesh imported from blender. I've tried stuff like sorting layers, so that I render my 3D mesh below a canvas UI element(side panel), for which I put my 3D mesh ...
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1answer
35 views

How can I create a custom size plane without scaling in Unity by code?

I'm planning create a plane with the size like 16x1x16, however, I wanna the scale of it is always 1x1x1. I found something useful information Unity change size of cube mesh. It aims to a cube mesh, ...
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29 views

Changing block shape to blend with adjacent blocks

I am in the process of programming a Minecraft like game in Unity. I am currently implementing the block mechanics. My goal is that when a block is placed, it has an effect on its neighboring blocks ...
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1answer
21 views

gl.drawArrays() not rendering whole mesh

I have a mesh that is generated using the marching cubes algorithm that is drawn using gl.drawArrays(), however the whole mesh isn't rendered, only part of it. I checked if the count I was specifiying ...
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33 views

Performant way to generate a cylindrical mesh along a dynamic spline

I am working on a mobile game, in which I am tiling a cylindrical mesh along a dynamic spline. The points of the spline are changing each frame, so the vertex positions and normals of the tiled mesh ...
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Why instantiated Static Mesh gets scaled in Unreal Engine 4? [closed]

Building a project in Unreal Engine 4.26 while trying to increase performance of the videogame I ended up using instances of static meshes where possible. This generated an issue: My instantiated ...
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1answer
23 views

How to map texture pixels to the corresponding 3D positions?

I have a mesh stored in .obj format with a texture image in .png format. For any "defined" pixel in the texture image, I'd like to compute the corresponding 3D coordinates when the texture ...
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1answer
75 views

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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1answer
28 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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1answer
27 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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22 views

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
93 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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37 views

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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31 views

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
156 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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22 views

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
133 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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1answer
30 views

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
69 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
80 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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136 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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32 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
69 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
137 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
218 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
15 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
49 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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58 views

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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31 views

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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36 views

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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324 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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55 views

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
33 views

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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63 views

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
44 views

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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0answers
162 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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43 views

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
3k 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
25 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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1answer
68 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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87 views

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
140 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
371 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 ...
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1answer
864 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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