Hello all, Have done a small 3d walking about game.. just a couple of buildings, not much going on.... and when i run it on my computer, it works fine, but when i run it from my sons computer, it runs very verys slow. Why I dont understand this is because: Quake runs ok on my computer, but on his computer, it runs perfect, much better than mine, yet my game is the other way round... Can anyone help??? is it maybe a better idea for me to learn DirectX?? Thank you all for you help.

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Original post by breenan Hello all, Have done a small 3d walking about game.. just a couple of buildings, not much going on.... and when i run it on my computer, it works fine, but when i run it from my sons computer, it runs very verys slow. Why I dont understand this is because: Quake runs ok on my computer, but on his computer, it runs perfect, much better than mine, yet my game is the other way round... Can anyone help??? is it maybe a better idea for me to learn DirectX?? Thank you all for you help.

Very very slow, does that mean like 4-5 fps instead of 100 fps?
Because that is (mostly) because of an unsupported hardware feature in OpenGL that will make it render the game in software mode, which is a lot slower...

Make sure you're running with a hardware profile, and not a software one ( which seems likely ).

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is it maybe a better idea for me to learn DirectX??

no

You should learn direct3d as well as opengl.
They are not very different any more and the slightly differing perspective on things is useful