Recent questions tagged OpenGL

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opengl - Are array textures related to sampler arrays?

OpenGL has array textures, denoted in shaders by specific sampler types: sampler2DArray array_texture; But GLSL also ... are they different? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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opengl - Low precision and clamping when writing to floating point FBO

I have an FBO which has been created in the following way: glGenRenderbuffers(1, &m_depthStencilBuffer); ... program with textureRect. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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opengl es 2.0 - GLSurfaceView displaying black on Nexus 7 with Android 4.2

I have an OpenGL ES2.0 app that is working on devices running various Android versions from 2.2 up to 4.1. However ... 0); bitmap.recycle(); } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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opengl - Why can glBufferData buffer structs for UBO and SSBO when c++ does not specify struct layout

I was browsing this page on how to use Uniform Buffer Objects in openGL and saw the following struct: struct ... a "practically portable" deal? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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opengl - C - invalid use of non-lvalue array

I have a matrix struct: typedef struct Matrix { float m[16]; } Matrix; When I try to call this function: memcpy ... tempMatrix.m, sizeof(m->m)); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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opengl - C# Rendering OpenCL-generated image

Problem: I'm trying to render a dynamic Julia fractal in real time. Because the fractal is constantly ... my questions remain unanswered. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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opengl - How to include model matrix to a VBO?

I want to send a buffer list (to the GPU/vertex shader) which contains information about vertex position, world ... slow for 1000's objects). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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opengl - Glut in Dev C++ error "redeclaration of C++ built-in type `short'"

I have this simple triangle drawing code and it produces an error "redeclaration of C++ built-in type short ". ... glutMainLoop(); return 1; } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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opengl es - WebGL/Javascript: Object transformations with multiple objects

I want to draw several objects and then transform them by selecting the specific one with a keyboard index. Let' ... only one object was drawn. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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opengl - GLSL custom/no interpolation of triangles with vertex colors

The effect I want to achieve is vertex color with sharp contours. So inside the triangle the fragment shader ... easier way to achieve this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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opengl - GLSL Half (floating point) attribute type

I have been trying to get a 16bit float (half-floating point) as an attribute into my GLSL vertex shader. ... ? Am I missing something obvious? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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opengl - Frame Buffer not Supported By this hardware. Java Processing library 2.2.1 and Unfolding Map Error

I am trying to use Unfolding Map Library with eclipse with Processing 2.2.1 as Graphics Library. But this ... i missing. Anybody Please Help. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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898 views

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opengl - Incorrect result when using 3D textures

I'm using modern OpenGL 4.3 core. I just realized that 1024p x 1024p tileset is too small for my needs. So, I ... .w; color += var_c_off; })"; See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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opengl es - Max programs in GLSL ES

What is the maximum number of programs that can be compiled in GLSL ES? So lets say I create 100 ... amount of active compiled programs? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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720 views

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opengl - How to make color of a section be different on a 3D object

I have the following 3D object: The material of my 3D object is coded like this with Qt3D: void MyClass::addMaterial( ... or GLSL. I'm not sure. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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738 views

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opengl - Framebuffer object with float texture clamps values

I have checked this similar question, but the suggestions did not solve my problem: Low precision and clamping when writing ... "); return 0; } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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opengl - GLEW - why should I define GLEW_STATIC?

I am using a statically linked library for GLEW and therefore I have to define GLEW_STATIC to compile my ... anyone explain the reason? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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706 views

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opengl es - What version of GLSL is used in the iPhone(s)?

I know that iPhone uses OpenGL ES 2.0, but I don't know the version of the underlying language GLSL. Is it 1.3, 1.4, 2.0, or other? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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676 views

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opengl - Is it possible to in-place resize VBOs?

The title says everything, but just to be clear I'll add some extra words. In this case, resize means: ... not very happy with the solution. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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686 views

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opengl - Analysis of a shader in VR

I would like to create a shader like that that takes world coordinates and creates waves. I would like to analyse the ... one. UV = vertexUV; } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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712 views

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opengl es - Writing to gl_FragColor causes INVALID_OPERATION on Android

I'm trying to master OGLES2 for NDK and stuck with GLSL shaders. The situation is similar to the one already ... some of its features... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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783 views

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opengl es - screenshot in android

The following is the code I am using to take a screen shot using GLSurfaceView. But I dont know why the ... learning to work on android. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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opengl - How to convert an ffmpeg texture to Open GL texture without copying to CPU memory

This ffmpeg example demonstrates how to do hardware decoding: https://github.com/FFmpeg/FFmpeg/blob/release/4.2/doc/ ... I guess it's possible. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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688 views

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opengl - GLSL Instancing - Max number of inputs for vertex data?

I am trying to implement instancing in my OpenGL program. I got it to work, and then decided to make my GLSL code ... (modelVP + i, 1); } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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719 views

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opengl es - Particle system using webgl

For a graphics course, we are implementing a particle system in WebGL. Doing the particle simulation calculations ... feedback is not available? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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638 views

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opengl - Just installed QtOpenGL but cannot import it (from Python)

I just installed it with apt-get on debian linux with apt-get install libqt4-opengl the rest of PyQt4 is available, ... . any idea what to do? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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608 views

1 answer

opengl - Capturing EAGLview content WITH alpha channel on iPhone

have been struggling with this issue for quite some time now and couldn't find an answer so far. Basically, ... . Any help appreciated. Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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567 views

1 answer

opengl - Capturing EAGLview content WITH alpha channel on iPhone

have been struggling with this issue for quite some time now and couldn't find an answer so far. Basically, ... . Any help appreciated. Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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