Wrong result when using OpenGL for GPGPU computing

1. LearnOpenGL

   1 637 12,035 3.8 C++

   Code repository of all OpenGL chapters from the book and its accompanying website https://learnopengl.com

   

   Hi everyone, currently, I am trying to do compute with OpenGL using fragment shader based on this tutorial: http://www.mathematik.tu-dortmund.de/~goeddeke/gpgpu/tutorial.html as my GPU does not support compute shader. My code logic is to draw a rectangle and transfer data from array X and array Y in the form of texture then attach the color buffer to framebuffer and read it back. However, the result I receive is very weird, and I don't know how to fix it.The shader header file is from this OpenGL tutorial: https://github.com/JoeyDeVries/LearnOpenGL/blob/master/includes/learnopengl/shader_m.h

2. InfluxDB

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   InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.

   

3. apitrace

   2 8 2,777 8.1 C++

   Tools for tracing OpenGL, Direct3D, and other graphics APIs

   

   You have several tools, this can be done by printing debug messages using extensions such as KHR_debug, or using specific tools which will inject themselves between your OpenGL calls and your driver such as apitrace or RenderDoc. I recommend running your program in RenderDoc regularly even if everything seems to work fine as it may help you catch some subtle bugs.

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