Be able to query key state

[nucleartide]

Hey Boyd,

First off, I absolutely love Scenic! Thanks so much for taking the time to create it, it is incredible.

I was wondering if you'd be open to supporting "keyboard state queries" in Scenic. It'd be useful for games that need to know the input state immediately. GLFW's key events are not as useful for real-time-y stuff, since they have "press", "repeat", and "release" phases that don't report back immediately.

Here's the part in the GLFW docs that describe the GLFW function we want: http://www.glfw.org/docs/latest/input_guide.html#input_key

What are your thoughts? 🙂

[boydm]

How "immediate" do you need the response? In order to query glfw, the Elixir side of the driver needs to query the port, which then needs to act on it, and send another message back to the BEAM process.

[nucleartide]

Hmm, I'd like for it to complete within 1/60 of a second (so a frame). I was thinking of calling it here.

This may be wrong, but it seems like glfwGetKey will be fast, and the communication between Elixir and C is the questionable part. Do you think the Elixir-to-C communication will complete in time?

[boydm]

At long last, this will be fixed in v0.11
Coming soon