UV mapping is the 3D modeling process of making a 2D image representation of a 3D model.
Questions tagged [uv-mapping]
286 questions
3
votes
3 answers
How to change Sprite uv in Unity?
I wrote the following script:
public class SpriteUV : MonoBehaviour
{
private SpriteRenderer _spriteRenderer;
private Sprite _sprite;
[SerializeField] public Vector2[] _uv = new Vector2 [4]
{
new Vector2(0.4f, 0.5f),
…
Narek
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votes
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threejs: how to render a texture with custom shaders INCLUDING the textures UV offsets
I want to render a texture to a plane using custom shaders. This texture has an 'offset' property set, that works correctly when I use a standard threejs material. However, I cannot figure out how to access these offsets in my custom fragment…
korrbit
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3
votes
1 answer
Per instance UV texture mapping in Three.js InstancedBufferGeometry
I have a InstancedBufferGeometry made up of a single Plane:
const plane = new THREE.PlaneBufferGeometry(100, 100, 1, 1);
const geometry = new THREE.InstancedBufferGeometry();
geometry.maxInstancedCount = 100;
geometry.attributes.position =…
Jack Wild
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3
votes
2 answers
UV Mapping issue artifact on Sphere OpenGl
I am UV mapping a 2D Texture on a 3d sphere X, Y, Z coordinates, by using the formula
u = (0.5 + atan2(X, Y) / (2 * glm::pi()));
v = (0.5 - asin(Z) / glm::pi());
in modern openGL C++.
I dont know why there is this artifact in the…
abstractnature
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3
votes
2 answers
Three.js Multiple UV maps on a single object
I am trying to figure out how to use two different textures on the front and back of a box.
Whenever I scale my box (ExtrudeGeometry), the UV maps do not seem to update. Therefore I am defining my own UV maps for the front and back of the box.
To…
Yannickd
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votes
1 answer
Why are these UV mapping coordinates represented in 0-1 and pixels? Shouldn't they use only the 0-1 system?
Well, I've got many UV coordinates of a 3D model clearly in the range 0-1 and many coords in seemingly pixel values in the range 100-300.
How do I know which one to interpret the coordinates as? Is there a standard or system for this?
I notice that…
Robin Rodricks
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votes
1 answer
How to modify UV coordinates with three.js
I want to modify a JSON model's unwrap (UV coordinates) during runtime in order to move the texture over the surface of the geometry. I found faceVertexUvs in the Geometry class documentation. It contains one array, which is correct. That array…
domsson
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votes
1 answer
Determining uv coords for dynamically generated mesh in unity
I have a mesh that represents portion of the surface of a sphere and I am having some trouble figuring out the UV coordinates for the verts.
Given the generation code for the verts could someone explain / provide an example of how I can determine…
War
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votes
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Render scene onto custom mesh with three.js
After messing around with this demo of Three.js rendering a scene to a texture, I successfully replicated the essence of it in my project: amidst my main scene, there's a now sphere and a secondary scene is drawn on it via a THREE.WebGLRenderTarget…
avramov
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ThreeJS pass uv coordinates to RawShaderMaterial?
I'm trying to create a shader with a texture map on it from scratch. Looking at the other materials (shaders) and their sources, it seems like they all have a "uv" attribute passed to them. I'm having a hard time figuring out where that uv attribute…
Andy Ray
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Calculating uv texture coords for a procedurally generated polygon
I have a shape like this:
and the coordinates of the points are available (Vertices have x and y components)
My texture is:
A simple planar UV mapping gives me:
and what I desire is:
How to calculate vertex positions to get the desired mapping?…
Aaron Azhari
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3
votes
1 answer
Custom UVgenerator Three.js for extrudedgeometry
I want to use a texture on the surface of my extruded geometry. I have been researching custom UVgenerators for a while now, and have found these related questions:
1.) How to apply a texture to THREE.ExtrudeGeometry?
2.) Loaded texture appears…
Laura
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Isolate a UV Island (aka Shell)
Alright, I'm in the middle of making a decal system that paints directly on textures. I also have it doing the legwork on the video card so there's no lag like using a Texture2D.Apply() approach.
Anyway, essentially I'm just stamping the texture…
gord0
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votes
1 answer
jme3 - UV map misplaced on model exported from Blender
I created a simple model of a barrel (.zip) in Blender 2.69. Then I created a UV map in Blender and made a UV mapped texture out of it (its in the archive, too). Then I imported my texture in Blender, now the mapping matches:
In Blender the model…
maxdev
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3
votes
2 answers
Avoiding seam in 3D cylinder model
I have this texture representing internal area of a pipe:
I have created a simple cylinder model (GeometryModel3D) by dissecting the above texture to a grid of points and than wrapping this to form a cylinder, then mapping the above texture to it…
Libor
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