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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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Texture Mapping in 3D Object (.pod) not happening correctly using isgl3D

I have used a 3D iphone (.pod) model, its showing correctly in PVRShammon. But when I imported that 3D model into isgl3D, its not showing correctly with the textured image, the image is covering only some of the areas of the object with some lines…
Infaz
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THREE.js generate UV coordinate

I am working on importing a model into a scene using the THREE.js OBJ loader. I know that I am able to import the geometry fine, because when I assign a MeshNormalMaterial to it, it shows up great. However, if I use anything that requires UV…
Cabbibo
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How can I pass multiple textures to a single shader?

I am using freeglut, GLEW and DevIL to render a textured teapot using a vertex and fragment shader. This is all working fine in OpenGL 2.0 and GLSL 1.2 on Ubuntu 14.04. Now, I want to apply a bump map to the teapot. My lecturer evidently doesn't…
lofidevops
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Difference between UV and ST texture coordinates

What's the difference between a UV texture coordinate vs. ST texture Coordinate? I know that UV and ST are used in OpenGL. I also know that ST are also used in Java.
Nabmeister
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Image manipulation and texture mapping using HTML5 Canvas?

In a 3D engine I'm working on I've succesfully managed to draw a cube in 3D. The only method to fill the sides is using either a solid color or gradient as far as I'm concerned. To make things more exciting, I'd really love to implement texture…
pimvdb
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How to use GL_REPEAT to repeat only a selection of a texture atlas? (OpenGL)

How can I repeat a selection of a texture atlas? For example, my sprite (selection) is within the texture coordinates: GLfloat textureCoords[]= { .1f, .1f, .3f, .1f, .1f, .3f, .3f, .3f }; Then I want to repeat that sprite N…
Kriem
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OpenGL: Trouble with Render to Texture & Framebuffer Object

I'd like to render a scene to an initially empty texture. To do so, I use a Framebuffer Object to which I attach an empty 2d texture and a depth buffer. After the set up, as for testing, I draw a simple quad into the scene. Every vertex has a…
Walter
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OpenGL4.5 - bind multiple textures and samplers

I'm trying to understand Textures, Texture Units and Samplers in OpenGL 4.5. I'm attaching a picture of what I'm trying to figure out. I think in my example everything is correct, but I am not so sure about the 1D Sampler on the right side with the…
Carlos Romero
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Creating a sphere that looks like Earth

How can you create a sphere in POV-Ray that looks like Earth? Presumably the answer would involve taking some kind of map of Earth and somehow wrapping it around a sphere as a texture. A Google search got me as far as…
rwallace
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What is the correct behavior when both a 1D and a 2D texture are bound in OpenGL?

Say you have something like this: glBindTexture(GL_TEXTURE_2D, my2dTex); glBindTexture(GL_TEXTURE_1D, my1dTex); glBegin... What is the correct OpenGL behavior? To draw the 1d texture, the 2d or both? For each active texture are there actually…
Chris
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texture mapping a trapezoid with a square texture in OpenGL

I've been trying to render a GL_QUAD (which is shaped as a trapezoid) with a square texture. I'd like to try and use OpenGL only to pull this off. Right now the texture is getting heavily distorted and it's really annoying. Normally, I would load…
ct_
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How to make a texture always face the camera ..?

Update 5 Created another fiddle to show what is expected would look like. An invisible skydome and a cubecamera are added and environment map is used; in my case, none of these technique should be used for the reasons already mentioned. var…
Ken Kin
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Vulkan texture rendering on multiple meshes

I am in the middle of rendering different textures on multiple meshes of a model, but I do not have much clues about the procedures. Someone suggested for each mesh, create its own descriptor sets and call vkCmdBindDescriptorSets() and…
Michael Wei
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Texture mapping in MATLAB

I have points in 3D space and their corresponding 2D image points. How can I make a mesh out of the 3D points, then texture the triangle faces formed by the mesh?
worbel
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How to convert a 3D point on a plane to UV coordinates?

I have a 3d point, defined by [x0, y0, z0]. This point belongs to a plane, defined by [a, b, c, d]. normal = [a, b, c], and ax + by + cz + d = 0 How can convert or map the 3d point to a pair of (u,v) coordinates ? This must be something really…
tigrou
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