I’m trying to build OpenGL Redbook examples from here in ubuntu 18.04 and with GCC 7.5.0 I made makefile using cmake -G "Unix Makefiles" .. in build directory But when i try to make I get errors about lib/vdds.cpp:645:1: error: jump to label ‘done_close_file’ [-fpermissive] done_close_file: ^~~~~~~~~~~~~~~ How can I fix this? Source: Windows Questions ..
Category : opengl
Environment : Visual Studio 2019. I’m developing an Engine as a SharedLib (DLL) and I made an example that uses this DLL so I can launch the Engine. at this stage I have to add GLFW library to the engine, so I added GLFW as a submodule (git) to my project and built this library ..
I’m using glTexImage2D() to create a texture. The texture is from a simple array of pixels. I’m specifying pixels with the format RGBA. However, OpenGL seems to expect the pixels to be formatted ABGR (RGBA backwards) in calls to glTexImage2D(). The short of it is: GLuint CreateTexture() { int w = 16, h = 16; ..
In the OpenGL, the vertex shader requires input straight from the VAO(Vertex array object). When the vertex shader receives data from the VAO’s attribute list, does it receive the VBO object as input or does it receive the data inside the VBO and store the data as input? Source: Windows Que..
In OpenGL, does VAOs store VBO objects in its attribute list or does it store the data contained inside the VBO inside the attribute list? Source: Windows Que..
I am using the Camera class from https://learnopengl.com/Getting-started/Camera. You can find the code here: https://learnopengl.com/code_viewer_gh.php?code=includes/learnopengl/camera.h I want to make the camera look in the negative direction of the y axis (from above). However simply changing the default pitch to -90 and the constraint values for it accordingly does not do the trick. It changed the ..
In OpenGL, I always see that the position attribute is always placed at attribute 0. Is it possible for the position attribute to be at number 1? Why is the position attribute always at attribute 0? Source: Windows Que..
I’m creating a Minecraft clone in C++ with OpenGL. I noticed today that when debugging the program on my laptop, the RAM usage is way higher that the RAM usage on my desktop PC (~1.3gb vs ~500mb). I’m getting these memory numbers from Visual Studio’s diagnostics tools. I’m using GitHub and even with the same ..
With the example code below, it has two different behaviors depending upon if I link with libGL.so vs. libOpenGL.so. This is on an Ubuntu 20.04 system with a PCI Radeon GPU. The behavior in both cases is that it will switch video modes. In the "bad/OpenGL" case the glGetString() returns NULL and in the "good/GL ..
I study uniform blocks in opengl and for practice I write a circle with blurred edges. But when using memcpy, it gives a warning that an exception has not been handled: GLuint blockIndex = glGetUniformBlockIndex(programHandle, "BlobSettings"); // Allocate space for the buffer GLint blockSize; glGetActiveUniformBlockiv(programHandle, blockIndex, GL_UNIFORM_BLOCK_DATA_SIZE, &blockSize); GLbyte* blockBuffer; blockBuffer = (GLbyte*)malloc(blockSize); // Query ..
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