Questions tagged [opengl]
OpenGL is a graphics standard and API which targets the desktop and workstation markets. It is designed to be easy to accelerate with dedicated computer hardware, and hence most implementations give greatly improved performance over traditional software rendering. Currently, OpenGL is used for applications like CAD software and computer games. It is also cross-platform. The OpenGL standard is controlled by the Khronos group, which also controls OpenGL ES.
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Fast Fourier Transform for Water surface simulation
I want to implement water in my game and have already done it using the Gerstner equation, but the result is not too impressive, then searching the Internet I found an article about how someone made ...
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Character overlaps with static objects
I am creating a simple OpenGL C++ game. I have a main character (green box) and some static objects (red boxes) positioned as stairs.
The problem is as green box is descending down the stairs, it ...
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Separating Game code and Engine code
I've decided to take on a challenge of making 16 c++ games based on this challenge from FamTrinli, I'm using SDL + OpenGL. I've created a simple 2D game in the past, but I didn't like the code ...
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Different texture generation methods with opengl
I'm experimenting with texture generation so I can begin to implement height map generation/terrain generation. Right now I'm just experimenting with different generating functions. Right now I'm just ...
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Sequencing interaction between rendering/animation and game logic in Poker game
I am building a two-player(CPU-User) Poker application with C++ and OpenGL. Currently the application just renders the graphics, keeps track of which button is pressed, value entered in textbox ...
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OpenGL texture not displaying despite setting uniform int
As you can see in the linked image, despite assigning a texture unit, there is no texture being drawn on the screen.
In the main loop, I am receiving error 1282, and there are no further errors ...
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Why opengl code in a lib doesn't renderer?
I am experimenting with opengl using c99 on windows and vs 2022 i tried to create an window using glfw in one project and put a function that supposed to generate a texture in another project that is ...
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Drawing triangles like it is 1980 but with OpenGL
How can I draw a triangle with modern OpenGL, that clearly shows pixels (filled rectangles) on diagonal lines?
What I have done so far:
Setup OpenGL (with GLEW) window in 320 x 200
Define vertices ...
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How to extend a VBO in OpenGL and keep its data?
I'm making a game with infinite, blocky procedurally generated worlds in python, with PyOpenGL. I figured out that allocating all the VBO space at once causes a lot of lag. To fix this, I am ...
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How to achieve Quake moving lava effect using OpenGL under v2.0?
On the first boss fight level you could notice how lava moves what is not a surprise for a software renderer. But according to the Quake fandom, GLQuake was released in 1997, hence OpenGL had no ...
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Recommended approach to image rendering on quads for OpenGL-backed canvas
I am working on a vector graphics rendering library for OpenGL in Rust. Currently, the library's API is as follows:
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OpenGL ES + SDL texture can only be moved with the combination of two keys
I making a simple game following JoeyDeVrieses guide on OpenGL, I followed the guide and created an input system, which handles the keyboard inputs and quitting the application, the issue is I cannot ...
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Should I use a full shader solution or geometry for vector rendering in OpenGL?
I am trying to create a vector rendering library for OpenGL in Rust. Currently, the goal is to produce nanovg-like rendering. I have found two approaches to doing my rendering:
The pure shader ...
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In a 3D projection, how to find 'w' for every y point on the screen
I have a standard 3D rendering pipeline. Let's say I have a camera looking down at a flat plane that represents the floor. (in my game, z = height, so this is a plane where z == 0), and for ...
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Force even window dimensions
Force even resolution window
I am using GLFW/glfw3 OpenGL to write 2D games.
Some of my shaders have artifacts that only appear when the window size has an odd value. Eg 1201 by 1024 creates artifacts....
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Well tuned orbit camera
I have been trying to make an orbit camera using glfw. I got a working solution which is as in the following.
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Why is my texture moving?
I tried sampling equirectangular texture as a reflection. It simply does not work as intended. The texture is moving with my camera in a weird manner. Here is what I tried to do.
Fragment shader:
<...
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Strange flashing cube bug in snake game
I'm trying to make a simple snake game in C and OpenGL, and I have this at the moment, which runs almost perfectly:
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Graphical issue when using a depth pre-pass
I have implemented the Z pre-pass technique into my engine, leading to a 2x performance improvement in a test scene.
However, the technique darkens the objects (but not the skybox), introduces z-...
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How to execute early depth test
I have trouble applying early depth test in my engine, to prevent fragment shader to be (fully) executed for fragments that will be overwritten anyway, because other fragments, drawn later, will be in ...
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How to procedurally compose shaders? [closed]
I read several times that shaders can be composed by the engine on the fly, depending on graphical settings.
How is this generally done?
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What is the advantage of using Element Buffer Objects, if any?
I'm following the amazing LearnOpenGL tutorials and noticed that Element Buffer Objects, which were mentioned and used in the Hello Triangle chapter, never appear again. So my question is, is using ...
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How to subdivide an octahedron into a sphere?
For a game I'm making, I have to tessellate an octahedron into a sphere on the GPU (shaders). What I've done is I've successfully tessellated the faces, but I'm having trouble subdividing more spaces, ...
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How to render a block being carved by a milling machine?
I'm making a simulation of a milling machine - something a bit like this diagram:
At the top there is a cylinder mesh representing the milling tool. Below it is a cube mesh representing the material ...
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Can we place a middleman on whatever functions are returned by WGL, EGL, or CGL?
I find myself wondering whether our PC games from the 2000s will continue to operate without a VM.
To the present, GPU manufacturers have generously kept pre-3.2 OpenGL in their drivers. I'm amazed ...
