GPU (graphics processing unit), is a specialized processor designed to accelerate the process of building images.

learn more… | top users | synonyms

3
votes
1answer
406 views

Proper updating of GeoClipMaps

I have been working on an implementation of gpu-based geo clip maps, but there is a section of the GPU Gems 2 article that I just can't seem to understand, specifically this paragraph, and more ...
5
votes
0answers
91 views

OpenGL: Frame partially jumps back and forth

I'm working on a project with SDL and OpenGL. The game works great on Windows, Linux, OS X and iOS. However, the Android version is showing a problem on my phone in particular. I have tested another ...
4
votes
0answers
284 views

How much is atomicAdd slower than an atomic counter?

I am considering replacing an atomic counter in my shader code with a SSBO an atomicAdd operation. What I need to know is the difference in performance of these two. I know the atomic counter executes ...
3
votes
0answers
401 views

How is Ping-Ponging done in Stage3D & AGAL (Flash Player 11)

Does anyone know how to create a Texture feedback effect in Stage3D / AGAL? I've just found the term "ping-ponging" in some GPU wikipage, hopefully I'm using it in the right place! I'll share with ...
2
votes
0answers
24 views

Simple square vertex lifting shader

I am trying to rebuild the fur effect in Viva Pinata. Here each square becomes a pattern of fur I imagine the process to be like this... U lift one end of the triangles. Now I need to ...
2
votes
0answers
38 views

Is there a way to identify, within a shader, the current GPU thread ID?

My question is rather simple: within a shader, is there a way (that works both in DirectX and OpenGL) to retrieve the ID of the given GPU thread being executed at the given iteration? I am using ...
2
votes
0answers
546 views

Android: Hardware Scaler

I was reading through this: using-hardware-scaler-for-performance and am a little confused by it. It says all you need to do to invoke the scaler is to set it like so: surfaceView = new ...
2
votes
0answers
94 views

Framebuffer Heightmap Performance Problems

I am using a framebuffer to procedurally create heightmaps with perlin noise in GLSL shaders. There are two main problems that I am experiencing with this. I have a quadtree for the terrain and in the ...
1
vote
0answers
48 views

How to render Viva Pinata fur

In the game Viva Pinata, cute virtual animals have color changing paper cut like furs. It didn't seem like using shell rendering because there are LOTS of animals in a scene and shell rendering each ...
1
vote
0answers
18 views

Multi Sampling in Rendering Pipeline?

I am trying to understand : How does multi-sampling rasterization effects pixel shader output? In a nutshell (i am skipping some steps to stay on point of question): Vertex data is fetched. Vertex ...
1
vote
0answers
20 views

Keeping a mesh entirely at the GPU and changing its vertices there with a ComputeShader (Unity5)

In a Unity game I have an object whose mesh is made of around 10k vertices and I have to make changes to these vertices (position, color, etc) almost every frame. Considering that such object is ...
1
vote
0answers
17 views

Simple coherent noise function to use in a GLSL shader

I'm looking for a simple (but especially fast) coherent noise function to use it in a shader written in GLSL. I don't need it to be excessively smooth or good looking, I just need that it has the ...
1
vote
0answers
126 views

OpenGL textureGather and DirectX gather

These functions sample multiple RGBA pixels but return only a single component. OpenGL: https://www.opengl.org/sdk/docs/man/html/textureGather.xhtml DirectX: https://msdn.microsoft.com/en-us/library/...
0
votes
0answers
12 views

Simplex noise input problem

I am running simplex noise on a compute shader and am having problems getting an even(ish) distribution, with very obvious errors. I know this is due to particular inputs used but I have no bases for ...
0
votes
0answers
29 views

What is GPU instancing and what are its differences in comparison to standard instancing?

I have been reading a lot of debate on a new feature that will be in Unity 5.4: GPU instancing. I understand the importance of instancing in general, both in terms of saving memory and draw calls. ...
0
votes
0answers
44 views

is there a way to make decent material having reflection, glossy behaviour etc. whithout GPU (GLSL, HLSL)?

I'm developping 3D applications using Irrlicht, i want to know if texturing is the only one solution to fake material behaviour, 'cause my video card doesn't support GPU programming (GEForce 6800)
0
votes
0answers
67 views

How to simulate a recoverable graphics driver crash

I'm trying to work around a bug in an external piece of code (Telerik graphs) that I do not have the source code to. It seems to make the graphics driver crash unexpectedly, but the graphics driver is ...
0
votes
0answers
214 views

What limits the number of vertices the GPU can process per clock cycle?

I am currently experimenting with OpenGL to make my own game. I wrote some test code to see what are the limits of my GPU. I own a Geforce 840m. This essentially consists of a draw command ...