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Questions tagged [texturing]

119 questions
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7 answers

OpenGL texture loading issue

This is a very vague problem, so please feel free to clarify anything about this project. I'm working on a very large application, and recently a very perplexing bug has cropped up regarding the texturing. Some of the textures that we are loading…
Andrei Krotkov
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Drawing a textured quad pixel-exact in 2D with OpenGL 3.3?

How to scroll a textured quad "pixel-exact" over the screen using float-positions with GL_LINEAR-filtering? If I try this task, I could always see a hard pixel-change during the very smooth movement if a subpixels-coordinate is greater or equal than…
SoulfreezerXP
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Correct storage allocation for textures in GL_TEXTURE_2D_ARRAY

Assume I have GL_TEXTURE_2D_ARRAY including 6 textures I'm loading it with: vector::iterator vsit; for(vsit=filenameTable.begin();vsit!=filenameTable.end();++vsit) { string filename = *vsit; BMPData* bmpData =…
CppMonster
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A couple of textures into one in Blender

I have some model in Blender. I'd like to: Connect a few different textures into one and save it as bitmap Make UV mapping for these connected textures I need to solve this problem for textured models in OpenGL. I have data structure which giving…
CppMonster
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OpenGL - Issue with transparent textures overlapping

I am pretty new to OpenGL I having been flowing the tutorials at http://open.gl/. I've tried to expand upon them for a school project. I am having an issue with multiple textures not rendering correctly. For some reason the previous texture is…
Chrono Fatalis
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GLKit GLKVertexAttribColor: Dynamically changing colours

So As objects get further away from me I want to apply a fade. The objects are textured. I believe the colour of the object is controlled via this line glVertexAttribPointer(GLKVertexAttribColor, 4, GL_FLOAT, GL_FALSE, sizeof(Vertex), (const GLvoid…
Burf2000
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Opengl texturing (with mimap or not) from a FBO

I must be missing something obvious in using FBO : I call TMyForm::Init() once at the start of my application : class TMyForm { ... private: Gluint mTextureId, mFboId; int mWidth, mHeight; } void TMyForm::Init() { mWidth = 1920; …
Arnaud
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OpenGL Texturing Garbage

I have a problem with texturing – it loads the image correctly, but renders garbage onto the geometry. The geometry itself draws fine (a simple triangle), but no matter which texture I load it just spits random patterns onto the triangle. I'm using…
Prime
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Transparent texture with OpenGL ES without using the alpha channel

Is it possible with OpenGL ES to texture a quad in such a way that all pixel (0,0,0) of the texture are not drawn while all the others are drawn? I have RGB888 images and the black color (0,0,0) is to be considered as completely transparent, while…
Marco Masci
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Add real life texture to .obj model

I have seen that there are a few older questions on here asking if adding a real life texture to a .obj file is possible using the in build Lidar scanner on newer devices, using RealityKit. Yet, there is still no solid answer to the solution. I am…
James McNulty
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iOS OpenGL runtime texturing

Is it possible somehow to automatically continue the building of an existing mesh? How this can be done? Let's say an example. I have a cuboid and I would like to have a bigger cuboid in runtime. The cuboid also have some texture and the new parts…
Infinite Possibilities
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How to draw an OpenGL alphamap with filled foreground and background?

I'm drawing text from a texture atlas containing an alphamap GL_ALPHA, GL_UNSIGNED_BYTE --- it's produced by stb_truetype, if that's any help. Right now I'm drawing with GL_BLEND enabled and the texture with all the default settings. I can set the…
David Given
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Ursina - Colorize custom model using MTL file

I'm using python 3.8, Windows 10, Ursina. I have a custom 3D model, created with this tool. When exporting, it includes an MTL file (which I'm guessing it uses to store the shape colors). When I go to load it in Ursina, it gives me the following…
Psychon Night
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OpenGL Texturing mesh FrontSide and BackSide

I doesn't have experience with OpenGL (and my question proof this) but I need a little snipplet to solve a problem. I have a mesh, a square and I need to apply 2 Texture: 1 FrontSide and 1 BackSide. This is the code to apply the texture…
Neo1975
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Polybrush errors in unity 2019.4

i tried to import Polybrush in my unity project on editor 2019.4, and it seems causing many errors, is there a way to correct the errors and use Polybrush again ? Thanks in advance.
WildFrog
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