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TimSweeneyEpic's profile
Tim Sweeney
Tim Sweeney
Tim Sweeney
@TimSweeneyEpic

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Tim Sweeney

@TimSweeneyEpic

Epic Games founder & CEO

epicgames.com
Joined August 2013

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    1. Tim Sweeney‏ @TimSweeneyEpic Feb 22
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      C++ really has three macro systems: C macros for strcat metaprogramming, C++ templates for constrained hygienic memoized metaprogramming, and overloaded functions for type voodoo metaprogramming arising from the lack of confluence among types and values.

      32 replies 19 retweets 256 likes
      Show this thread
    2. Sam Debenham‏ @Sam_Makes_Games Feb 22
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      Replying to @TimSweeneyEpic

      Tim, one day I will have the knowledge to understand your tweets, but for now this looks like someone took the 15 biggest words from the wiki on programming and put them into a sentence. I'm going to trust that it makes sense and nod and agree

      2 replies 0 retweets 24 likes
    3. L. Austin Space‏ @VrDevBrad Feb 22
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      Replying to @Sam_Makes_Games @TimSweeneyEpic

      Tim also thinks you can start a fire with moonlight and a big enough magnifying glass, so take it with a grain of salt.

      2 replies 0 retweets 3 likes
    4. Nathan SculptrVR‏ @SculptrVR Feb 23
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      Replying to @VrDevBrad @Sam_Makes_Games @TimSweeneyEpic

      I think maybe you could.. moonlight is not blackbody radiation, it’s reflected sunlight, so theoretically you should be able to reach temperatures of SunSurfaceTemp * PortionOfEnergyReflectedOffMoon.

      1 reply 0 retweets 0 likes
      Tim Sweeney‏ @TimSweeneyEpic Feb 23
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      Replying to @SculptrVR @VrDevBrad @Sam_Makes_Games

      Yes exactly. The temperature of the moon is irrelevant. In the described problem, it’s just a giant diffuse reflector beaming sunlight to earth.

      8:17 AM - 23 Feb 2020
      • 3 Likes
      • Dan Tabár Flanger of Towels Nathan SculptrVR
      2 replies 0 retweets 3 likes
        1. New conversation
        2. Flanger of Towels‏ @IntoxicusFlangn Feb 23
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          Replying to @TimSweeneyEpic @SculptrVR and

          Sure, but it seems to be too diffused for the magnifying glass trick to work with moonlight. I'm sure it's been tried and if it worked we would have YouTube videos of it by now.

          1 reply 0 retweets 0 likes
        3. Nathan SculptrVR‏ @SculptrVR Feb 23
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          Replying to @IntoxicusFlangn @TimSweeneyEpic and

          I found a random dude online claiming the moon is 1/500,000 as bright as the sun. About 10cm^2 Magnifying glass is needed to burn things with sunlight. So for moonlight we’d need 5,000,000cm^2 or 500m^2. A ~25m diameter magnifying glass.

          2 replies 0 retweets 1 like
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        2. L. Austin Space‏ @VrDevBrad Feb 23
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          Replying to @TimSweeneyEpic @SculptrVR @Sam_Makes_Games

          The key word there is *diffuse*. If the Moon were a giant mirror, sure you could use it in part of an optical system to reach solar temperatures... as long as you were IN the path of the reflected sunlight, which you would very rarely be.

          2 replies 0 retweets 1 like
        3. L. Austin Space‏ @VrDevBrad Feb 23
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          Replying to @VrDevBrad @TimSweeneyEpic and

          Optically, there's no distinction between the blackbody radiation emitted by an object, and diffuse reflected light. They're both light emitted in all directions of a given intensity.

          1 reply 0 retweets 1 like
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