gpuray.blogspot.com

Rays of hope

Sunday, January 3, 2010. Those of you who have used CUDA textures should be familiar with the insane programming interface that they present. Texture references can be declared only as global variables, and only in the file where you are using them. You can't pass them around as by-value/by-reference arguments in functions, you can't create them inside function/class scope, and you cannot make arrays of them. Should we hard code this? The answer is NO! Global variable several times, this actually works.

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Rays of hope | gpuray.blogspot.com Reviews

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Sunday, January 3, 2010. Those of you who have used CUDA textures should be familiar with the insane programming interface that they present. Texture references can be declared only as global variables, and only in the file where you are using them. You can't pass them around as by-value/by-reference arguments in functions, you can't create them inside function/class scope, and you cannot make arrays of them. Should we hard code this? The answer is NO! Global variable several times, this actually works.

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Rays of hope | gpuray.blogspot.com Reviews

https://gpuray.blogspot.com

Sunday, January 3, 2010. Those of you who have used CUDA textures should be familiar with the insane programming interface that they present. Texture references can be declared only as global variables, and only in the file where you are using them. You can't pass them around as by-value/by-reference arguments in functions, you can't create them inside function/class scope, and you cannot make arrays of them. Should we hard code this? The answer is NO! Global variable several times, this actually works.

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gpuray.blogspot.com

1

Rays of hope: July 2009

http://gpuray.blogspot.com/2009_07_01_archive.html

Sunday, July 19, 2009. Optimizing memory access in CUDA. Now that we understand how to use textures in cuda, I think it is time to tackle a simple problem and see how we can optimize some code. The naive implementation is as follows:. 1 Put the input image into global memory. 2 Create NxN threads, such that each of these threads operates on one of the output pixels. 1 Break the input image into buckets of bxb size, where b is around 8 or 16. Naive Implementation, with all global memory reads and writes.

2

Rays of hope: Octree boundary artifacts

http://gpuray.blogspot.com/2009/08/octree-boundary-artifacts.html

Tuesday, August 18, 2009. 10 level octree (1.2 seconds to render). 8 level octree (1.3 seconds to render). 6 level octree (5 seconds to render). 4 level octree (80 seconds to render). I don't have a solution to this problem yet, but I am thinking along the lines of adding splats to multiple octree leaves, or checking multiple nearby octree leaves while shading (rather than a single octree leaf). Subscribe to: Post Comments (Atom). A dash of OpenMP goodness. Ray-bounce improvements and supersampling.

3

Rays of hope: And we are back...

http://gpuray.blogspot.com/2010/01/and-we-are-back.html

Saturday, January 2, 2010. And we are back. It has been far too long since my last post here. I guess regular blogging and regular exercise are equally hard :). But I have not gone into torpor for the last few months. We ported our raytracer to CUDA this October, and development on that is still going on. Visit my website. For the updates on that. Raytracing with reflection, refraction, phong shading and shadows. Scenes are point models (points are represented as oriented disks/splats). And we are back.

4

Rays of hope: CUDA multi-gpu textures

http://gpuray.blogspot.com/2010/01/cuda-multi-gpu-textures.html

Sunday, January 3, 2010. Those of you who have used CUDA textures should be familiar with the insane programming interface that they present. Texture references can be declared only as global variables, and only in the file where you are using them. You can't pass them around as by-value/by-reference arguments in functions, you can't create them inside function/class scope, and you cannot make arrays of them. Should we hard code this? The answer is NO! Global variable several times, this actually works.

5

Rays of hope: June 2009

http://gpuray.blogspot.com/2009_06_01_archive.html

Sunday, June 28, 2009. Finally, the GLSL implementation of the diffraction project is working. Here is a sample image rendered using OpenGL:. The speedup seen is enormous. Lets see how far we have come in terms of efficiency:. The reason for such a speedup is mostly because of the number of texture lookups that are performed in the shader. The CUDA application does this using global memory, and that is a lot slower than texture lookups (because textures use the texture caches present in hardware). Here i...

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Rays of hope

Sunday, January 3, 2010. Those of you who have used CUDA textures should be familiar with the insane programming interface that they present. Texture references can be declared only as global variables, and only in the file where you are using them. You can't pass them around as by-value/by-reference arguments in functions, you can't create them inside function/class scope, and you cannot make arrays of them. Should we hard code this? The answer is NO! Global variable several times, this actually works.

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