Questions tagged [3d-meshes]
Geometric representations of objects in 3 dimensions. 3D-meshes are made up of a collection of triangles or other polygons, forming volumes and surfaces. They are commonly used for visual representations on computer screens.
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In Unity: how can I get the precise diameter of the cross section of an imported mesh?
For a simulation, I imported a mesh structure into my Unity project. This mesh consists of triangles and cannot easily be modelled by spheres/ cubes etc.
I am wondering, if there is a way to get the ...
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Detect intersections between an `AABB` and a `CollisionShape3D`
I thought this would be a simple matter of getting the mesh that defines the CollisionShape3D and checking if any of the triangles of the mesh intersect with the <...
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Tilemap vs terrain vs optimized mesh for top-down game
I'm experimenting with a top down vertical scroller in Unity, with a perspective camera, NOT orthogonal.
(It's unclear how 'pixelated'/pixel art I will want the graphics but that's another question)
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Should I model with quads or with n-gons?
Model 1 — all 4-sided polygons
Wireframe Gun Model 1
Model 2 — polygons have arbitrary number of sides/vertices
Wireframe Gun Model 2
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Material going to oposite side in procedural mesh creation
Tried to instantiate this gameobject procedurally, material texture went to the other side:
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How to swap skinned meshes for a customizable character in Godot?
Using Godot 3.5.1, I need to make a system that switches armors/helmets/hair styles/weapons and so on.
I've seen a single tutorial for how this is done in 3D games in Godot, and apparently it is not ...
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How to cut a desired shape out with desired depth of a mesh on VR?
I am creating my first Unity project which is a 𝐕𝐑 𝐬𝐢𝐦𝐮𝐥𝐚𝐭𝐢𝐨𝐧, and I am struggling with a particular issue.
I need to create 𝐚 𝐜𝐨𝐦𝐩𝐥𝐢𝐜𝐚𝐭𝐞𝐝 𝐦𝐞𝐬𝐡 𝐜𝐮𝐭 𝐟𝐞𝐚𝐭𝐮𝐫𝐞 that ...
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Group voxels into object?
I'm working on Voxel editing software, and I need to have the ability to group voxels into objects.
As for simple editing, I'm using the following data structure:
Chunk - represents a fixed 3d grid ...
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Issue with rotating tail for 3d model in Maya
I've been stuck on this issue for a long time and it's been driving me crazy: I have this model of Jabba (see image 1) which I bought off of CG Trader several years back. I want the character to look ...
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Calculating normals for a simplified terrain mesh
I am trying to simplify a mesh I am generating from a heightmap by creating larger triangles for areas of equal elevation, like this:
This however gives me issues with my normals:
I am calculating ...
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How to get a scene information from Unread Engine 4?
I learn game engine development and I was interested to work not only with box and sphere meshes also with a large model with difference meshes and textures in this model. I bought a 3d model. The ...
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How to render a block being carved by a milling machine?
I'm making a simulation of a milling machine - something a bit like this diagram:
At the top there is a cylinder mesh representing the milling tool. Below it is a cube mesh representing the material ...
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How to create an octahedron for sphere subdivision?
I have vertices that generate the first out of two pyramids. However, I want to have the second pyramid facing downwards as to make an octahedron. What are the correct vertices to use, because I've ...
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Mesh is displayed differently in Unity with some undesireable visual elements
I'm not sure what to make of this:
this is what it looks like in unity scene view/game view
This is, for example, the same upright triangle in microsoft's 3d object viewer:
I have no clue what to ...
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GridMap centers meshes of different heights in cell
I am trying to use the superb GridMap in Godot 4 beta 5.
I have, so far, only 2 different types of meshes in my MeshLibrary.
1x1x1 cube
1x1 plane
My intention is ...
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Simple and easy workflow for High-poly to Low-poly?
I am unable to find some models in low-poly style that I want.
Since I don't need to add detail, but rather remove the details, I wonder if I could use a simple workflow to reduce the polygon count ...
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How to handle overlapping meshes?
So I want to note that I am a beginner at game dev but an okay coder. I wish to make a game in which the character changes clothes.
I have a character and a few clothing meshes that all have the exact ...
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GameObject mesh.vertices array is empty
I've an Icosphere GameObject:
I want to iterate over each of the faces and change the material based on their distance from the center, however I don't seem to be able to retrieve the list of ...
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Seamless random morphing hex tiles' vertices in Unity3D?
I have a hex based, fully flat tilemap the tiles' mesh currently isn't generated, but a static mesh file containing 6 vertices, UV mapping, etc.
Then I saw this picture on Unity Answers:
I'd like ...
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Raycasting to determine point inside or outside mesh, edge case?
I'm trying to determine if a point is inside or outside a (triangle) mesh.
The best way I found was to cast a ray from the point and count how many triangles intersect. (Odd or even).
I used Möller–...
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How to get height from a mesh
I have a terrain which is a mesh. Given the x and z coordinates in which a character is placed, I would like a function that ...
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Problem Cloning Skinned Mesh Renderers Mesh via script
I was trying to clone a rigged mesh via script and change its orientation as the characters face wasn't facing at forward direction. So I created a Editor Script for that:
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Converting mesh vertices to world coordinates for raycasting
My goal is to figure out if a point exists within a 3D polygon. To do this here is what I am doing:
Load obj mesh
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Unreal 4: How to save generated UProceduralMeshComponent to level file in editor and load it at runtime?
I have UProceduralMeshComponent that I generate in editor from data entered by level designer. Now I need to save it to level file in editor to load it in runtime without generating new mesh again.
Is ...
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What is the purpose of tangent and bitangent vertex attributes?
Every vertex of a 3D mesh has position and some optional values like texture coordinates, vertex color, and normal, but also tangent and bitangent vectors.
While the purposes of texture coords, vertex ...
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Fast way to test whether a point is over a 3D mesh
I have a map with islands, and I need to detect whether the player is on an island or not.
The player can be flying far above the island, so a fixed-distance raycast is not sufficient, and firing long ...
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3D Asset Creation. "Joining" parts VS Hidden/Redundant Faces?
I am trying to create a Laser Cannon in 3D art program Maya. It is for use in a game made in Unreal Engine.
I have this same 'problem' with many aspects of my 3D CG Art but this is just one simple ...
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Collision detection between transformed meshes (not primitives)
I know questions related to collision detection have been asked multiple times, but I find all of them like this and this depend on the assumption that I have some sort of measurement of the object ...
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Need an approach for mounting turrets
I'm working on a game with the ability to customize the type of turrets on your starship. My question is how would I go about positioning the turret mesh at the hardpoint locations. Do I need to ...
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Should Game-Ready Assets Be Single Meshes or Multiple Meshes?
Say for example that someone is modeling a sword asset. A sword has many pieces -- the blade, guard, hilt, pommel, etc. -- so should this be modeled as a single mesh (or as multiple meshes which then ...
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Unreal Engine - Materials Import as Gray
I imported the .fbx files from here: https://www.cgtrader.com/3d-models/industrial/other/big-warehouse-pack
into an Unreal Engine 4.27 project. All the meshes load in properly, but the materials are ...
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260
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Switching out the mesh of a game object at runtime
I am trying to switch out the mesh of a game object. I have this script:
...
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Unity intersection of mesh renderers on Android
I’m currently developing a game with Unity and ran into a problem while building for Android.
The player and obstacles are mesh renderers (for example cubes & boxes). On iOS and the Unity editor, ...
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Pink Objects/Sub-Meshes (NOT MATERIALS)
Using URP. Any object I import into unity from blender (fbx), the sub-mesh that comes with it are pink. All the materials are fine, I can put the object in my scene with a material and it looks normal....
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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 to weld nearby mesh collider vertices together to erase seams in Unity?
I'm using Unity 2020.3.2f1 and I have a very commonly seen problem. I have a Spherecollider which I am using for a physics game, and geometry that uses ...
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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. ...
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how can I rotate a tetrahedron's vertices so that it's pointing straight up?
I am trying to render an Equilateral triangle in 3D, and I came across this answer:
https://math.stackexchange.com/a/562895/15497
So based off of that, I made my vertex points:
...
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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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How to edit a Rigged 3D Model without Ruining the Rig?
I have some rigged 3D models that I want to use. They came as .fbx. and sometimes I want to make some minor edits such as merging/moving/removing some vertices or something of that nature.
The Problem:...
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Exported FBX to Monogame doesn't translate all meshes
I'm taking a crack at a minecraft clone in Monogame, and I am trying to get my model to render as it's shown in Blender 2.9.1. When I look at the model in Blender, it looks great. When displaying in ...
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Best Practices for Texturing Large Objects
Kind of a 3D graphics newbie here. This is the biggest prop I've ever tried to texture, and I'm kind of stumped. How do you get a decent resolution on large meshes like this without exporting ...
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Creating Sphere Triangles from Vertices
I came across a way to create the vertices of a sphere, located here: https://gamedev.stackexchange.com/a/150293/62793
I converted this to the following C# example:
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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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Blender->Unity Import Animation Failing by Overlapping Mesh Objects
I'm new to both Unity and Blender. I created this penguin 3d model, rigged it up and animated it in Blender and all looked good.
When I imported it into Unity, I noticed that this idle animation did ...
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Generating a mesh from a set of generatively produced co-ordinates
Using Unity I've been producing sculptural forms that look like this. It's made of patterns of cubes that twist around each other using a flocking algorithm. I'm trying to get it into a 3D printable ...
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Half of my tris are textured in streaks and blurs
I have written code to import meshes from OBJs and textures from BMPs. My texture coordinates seem to be getting messed up somehow, or some other issue is occuring, because I am getting these effects ...
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How to inflate and deflated an object?
I'm trying to find a way to make an object inflated/deflated in Unity,
So I can change parameters via script and control a range of 0-100% inflation.
I have seen that there is a way to get this exact ...
