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Thread: GLSL noise fail? Not necessarily!

  1. #41
    Junior Member Regular Contributor
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    Norrkoping, Sweden
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    Re: GLSL noise fail? Not necessarily!

    Benchmark result for ATI Radeon HD 4850:
    GL vendor: ATI Technologies Inc.
    GL renderer: ATI Radeon HD 4800 Series
    GL version: 3.3.10428 Compatibility Profile Context

    2D simplex noise, version 2011-03-21, 2455.1 Msamples/s
    3D simplex noise, version 2011-03-21, 1413.6 Msamples/s
    4D simplex noise, version 2011-03-21, 870.9 Msamples/s

  2. #42
    Junior Member Regular Contributor
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    Jan 2005
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    182

    Re: GLSL noise fail? Not necessarily!

    My over three year old laptop with integrated Intel graphics:

    Code :
    GL vendor:   Tungsten Graphics, Inc
    GL renderer: Mesa DRI Intel(R) 965GM GEM 20100330 DEVELOPMENT 
    GL version:  2.1 Mesa 7.10
     
    2D simplex noise, version 2011-03-21, 23.1 Msamples/s
    3D simplex noise, version 2011-03-21, 15.4 Msamples/s
    4D simplex noise, version 2011-03-21, 9.0 Msamples/s

  3. #43
    Junior Member Regular Contributor
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    182

    Re: GLSL noise fail? Not necessarily!

    And here's the results for software rendering on an Intel(R) Core(TM)2 Duo CPU T9300 @ 2.50GHz:

    Code :
    GL vendor:   Mesa Project
    GL renderer: Software Rasterizer
    GL version:  2.1 Mesa 7.10
     
    2D simplex noise, version 2011-03-21, 0.3 Msamples/s
    3D simplex noise, version 2011-03-21, 0.2 Msamples/s
    4D simplex noise, version 2011-03-21, 0.2 Msamples/s

  4. #44
    Junior Member Newbie
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    Mar 2011
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    5

    Re: GLSL noise fail? Not necessarily!

    We've added Stefan's benchmark's (and Stefan) to the repository and included a number of suggestions and fixes from earlier in the thread.
    http://github.com/ashima/webgl-noise

  5. #45
    Junior Member Regular Contributor
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    Re: GLSL noise fail? Not necessarily!

    The code in the Github repository provided by Ian has now been updated rather a lot, and I no longer recommend using my pre-packaged zip archives posted above. They still work, but I will not be updating them on a regular basis. Please use the Github repo to get the latest versions of the shaders and the benchmarking application.

    And for those of you wondering, yes, there is a write-up coming. We're working on it right now. In the meantime, feel free to ask any questions here.

  6. #46
    Junior Member Regular Contributor
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    Re: GLSL noise fail? Not necessarily!

    Nice work!

  7. #47
    Junior Member Regular Contributor
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    Dec 2009
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    197

    Re: GLSL noise fail? Not necessarily!

    The invSqrt taylor approximation uses the value 0.83666002653408, which is the square root of 0.7, shouldn't this be the inverse root of 0.7, i.e. 1.195228609 ?

  8. #48
    Junior Member Regular Contributor
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    Re: GLSL noise fail? Not necessarily!

    Yes, of course. Good catch, thanks! It has only a minor effect
    on the final result, but it does make a difference. This change
    will be committed to the repository as soon as I have
    determined the corresponding scaling of the final values.

    EDIT: Github repository updated.

  9. #49
    Junior Member Newbie
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    Mar 2011
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    5

    Re: GLSL noise fail? Not necessarily!

    We've changed the licence to the MIT License.

  10. #50
    Member Regular Contributor
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    Mar 2003
    Location
    Spain
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    273

    Re: GLSL noise fail? Not necessarily!

    Results on a MacBook, not very impressive, but this week I will post the results on a GTX580

    GL vendor: NVIDIA Corporation
    GL renderer: NVIDIA GeForce 9400M OpenGL Engine
    GL version: 2.1 NVIDIA-1.6.26
    Desktop size: 1280 x 800 pixels

    2D simplex noise, version 2011-03-25, 134.4 Msamples/s
    3D simplex noise, version 2011-03-25, 61.7 Msamples/s
    4D simplex noise, version 2011-03-25, 25.9 Msamples/s
    "!I don't know... fly casual"

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