Install system OpengL, EGL, OpenGL ES 2.0

sudo apt-get install libglfw3-dev libgles2-mesa-dev 

Update the repo

Requires #110

git pull
git submodule update --init --recursive

Run tests:

https://gist.github.com/headupinclouds/4bb7928cdd6b77955f92524e47d2af40

bash  test_acf.sh

for i in gcc-5-pic-hid-sections_*.txt; do echo $i; cat $i; gnome-open ${i} done

gcc-5-pic-hid-sections_es2OFF_es3OFF_cpu.txt

[15:58:48.388 | thread:27335 | acf-detect | info]: 1/1 n-EYES-628x314.jpg = 2; score = 141.611

gcc-5-pic-hid-sections_es2OFF_es3OFF_gpu.txt

[15:58:48.466 | thread:27338 | acf-detect | info]: 1/1 n-EYES-628x314.jpg = 2; score = 147.731

gcc-5-pic-hid-sections_es2ON_es3OFF_cpu.txt

[15:57:13.050 | thread:26368 | acf-detect | info]: 1/1 n-EYES-628x314.jpg = 2; score = 141.611

gcc-5-pic-hid-sections_es2ON_es3OFF_gpu.txt

[15:57:13.128 | thread:26371 | acf-detect | info]: 1/1 n-EYES-628x314.jpg = 2; score = 149.846

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#110　works fine on x86 ubuntu18.04! Great jobs!!

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Assertion 'm_context' failed

@BourneYin I think error is common in glfw when there is some kind of problem with the GPU. Do you have a GPU? There are probably a lot of reasons this could fail. For example, if you are working remotely attempting headless rendering. Maybe some of this is relevant isl-org/Open3D#17. You can also request a context via EGL, which might help. I'm trying Ubuntu 18.04 now.

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Assertion 'm_context' failed

@BourneYin I think error is common in glfw when there is some kind of problem with the GPU. Do you have a GPU? There are probably a lot of reasons this could fail. For example, if you are working remotely attempting headless rendering. Maybe some of this is relevant intel-isl/Open3D#17. You can also request a context via EGL, which might help. I'm trying Ubuntu 18.04 now.

Thank you very much.　I did use Intel graphics cards before. Regretfully，I switched to AMD platform and still had the same problem.

I'll try you #110 request.
Thank you again for your help！！

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Merged.

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