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Questions tagged [texture-mapping]

Texture mapping is a method for adding detail, surface texture (a bitmap or raster image), or color to a computer-generated graphic or 3D model.

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How to send non-normalized/unclamped values to GLSL shader using opengl textures?

I am trying to send an array of float values(height map) to GLSL as a GL_TEXTURE_2D. While I have the samplers set right, the issue comes from the clamping that happens when I upload the texture using glTexImage2D(). glGenTextures(1,…
Rathnavel
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Can a Vulkan sampler's maxLod be too high?

Suppose I'm making a VkSampler, or possibly a set of VkSamplers, that I'm planning on using with several textures. Each texture has multiple mip levels, and the number of mip levels varies from texture to texture. I want all sampler options to be…
mjwach
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How to convert a colored point cloud into a textured mesh?

I have a .ply file which contains a colored point cloud: I need to convert it as a textured mesh. I can create a blank mesh doing: Filters -> Point Set -> Surface Reconstruction: Poisson But the result is a white mesh It seems that all the…
Simone Colnaghi
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Texture Mapping C++ OpenGL

I have read around on this, including Nehe and here for solutions, but I cant find a specific answer. I am trying to load a a photo, called stars.jpg. I want to make this my background of the scene, by mapping it using uv coordinates, doing it…
Jim
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OpenGL loading binds the last loaded texture to all textureID's

So my problem is that I try to load multiple textures at start up and then store all of the ID's so that I can bind them to use them. Now I know that the ID's are being stored correctly because I can debug it and see in both assigning and usage that…
Hewiiitt
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OpenGL Texture Mapping

I am new to game programming and graphics programming. However, I eagerly wish to learn, so I have begun building a game engine with OpenGL. I have implemented all of the basic graphical features, and now I want to add texture support for my…
user434565
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How to normalize image coordinates for texture space in OpenGL?

Say I have an image of size 320x240. Now, sampling from an sampler2D with integer image coordinates ux, uy I must normalize for texture coordinates in range [0, size] (size may be width or height). Now, I wonder if I should normalize like…
Armen Avetisyan
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Applying a texture material to custom objects in SceneKit

SceneKit beginner here, doing an iOS project. I have been wrapping textures around SCN geometry (spheres, so far) like this: let scene = SCNScene() var planet : SCNGeometry planet = SCNSphere(radius: 1.0) let material =…
Brandon Slaght
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"sphere in a bag" plane to sphere projection

I'm looking for the mathematical transformation to transform points on a 2D plane [0,1]x[0,1] onto the unitsphere. The most common projection would latitude-longitude mapping by interpreting u and v as the angles for the spherical coordinates (map u…
Mat
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MeshBasicMaterial color tints texture map three.js

I'm working with a MeshBasicMaterial to which I have applied a color. var material = new THREE.MeshBasicMaterial({color: myColor}); at some point I need to add a texture to the material material.map = new THREE.ImageUtils.loadTexture(...); this…
netpraxis
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(Py)SDL2: Drawing a textured polygon

PySDL2 version: 0.9.3 SDL2 version: 2.0.3 I am trying to render this image as a texture on a polygon in PySDL2 using sdl_gfx but its display is completely distorted, as can be seen at the bottom-right corner in the SDL window: I have this python…
Daniel Schreij
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Mapping Wavefront .obj texture vertex on OpenGL

An artist gave me all 3D models for me exporting to .obj and .mtl in order that I can render it using OpenGL. But I can't figure out why the texture vertex are greater than 1 and sometimes negative. Take a look at this example: (...) vn -0.000717425…
rodrigogq
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Mapping texture to 3D objects in a batch process on the server

we have the following use case: the user uploads her picture on a web server at a later time - on the server - the picture(s) are mapped on predefined 3D objects and stored as normal images (png, jpeg, ...). For now just the front-view. The files…
Memical
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How to map texture on a custom non square quad in THREE JS

playing around with ThreeJS, i encoutered a classic problem of non square quad texturing : http://www.xyzw.us/~cass/qcoord/ Problem is ThreeJS only let you set texture coordinates with a vec2 (for what i know ..) And after spending hours on this,…
PBV
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Assimp model has Textures but no Texture Coordinates

I'm using Assimp to load 3D models into my program. Everything has gone dandy so far, except I've come across a Lightwave object that doesn't seem to make sense. Of course it renders nicely in Lightwave, but in Assimp there are no texture…
GraphicsMuncher
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