Tagged Questions
2
votes
1answer
314 views
OpenGL Fast-Object Instancing Error
I have some code that loops through a set of objects and renders instances of those objects. The list of objects that needs to be rendered is stored as a std::map>, where an object of class ...
0
votes
1answer
142 views
What is “ping pong” in the context of graphics rendering?
I have to render a scene, once per light, and blend the result of the various passes. I heard and read that one way to increase performances and render targets to use would be ping pong.
I'm new to ...
0
votes
1answer
316 views
Drawing the same scene with perspective then orthographic projections
I have a scene that I'm rendering first with a perspective matrix. I then want to rerender it in a different viewport using an orthographic matrix for a top-down 2D view of the scene. I think I may be ...
3
votes
0answers
433 views
AlphaToCoverage + Alpha Blending = Artifacts
I'm experiencing a strange problem using OpenGL SampleAlphaToCoverage mode. There are rendering artifacts when using alpha-blending on pixels that have been rendered using alpha-to-coverage - and I ...
1
vote
0answers
104 views
How can I reduce draw calls when using glBufferSubData and DYNAMIC_DRAW?
At first I had the problem where I had about 150 rectangles rendered every tick. I only used STATIC_DRAW and glBufferData. I added support for DYNAMIC_DRAW and glBufferSubData and now I have a very ...
1
vote
0answers
356 views
Optimal OpenGL 2D Sprite Batching (Best Practice)
I am working on simple 2D engine using OpenGL (3.3+) for rendering and was wondering what the optimal method of sprite batching would be. I plan to put all sprites into one (or fewer) texture atlases. ...
1
vote
0answers
93 views
Rendering text with stb_font results in glitches
I'm trying to render text with OpenGL and an "inline"-font taken from the stb_fonts
The relevant code for initializing the font & rendering:
LabelFactory::LabelFactory() {
static unsigned ...
0
votes
0answers
35 views
OpenGL - using gluSphere
I have an OpenGL code that currently draws several spheres at different locations. I generate the vertex buffer data (and normal data) myself. However, to simplify the code and increase efficiency, I ...
0
votes
0answers
62 views
Libgdx - 2D Mesh rendering overlap glitch
I am trying to render a 2D circle segment mesh (quarter circle)using Libgdx/Opengl ES 2.0 but I seem to be getting an overlapping issue as seen in the picture attached.
I cant seem to find the cause ...
0
votes
0answers
57 views
Diffuse Mapping in a Game
I want to figure out the diffuse maps of some rusted objects that I plan to render in my game arena. I have taken the images of some sample objects and have also scanned them for a model of the ...
