Use one image inside of Emacs buffer as a canvas

[rexim]

We need to investigate if it's possible to do so

[rexim]

Yes! It is fucking possible! Via xpm!

@ForNeVeR, @Minoru, guys! You gotta check this out! We can use one image as a canvas for the whole game!

[rexim]

But I don't know what to do with this knowledge. Because using this technique in our game will require a lot of rewriting. :(

[rexim]

Also we need to check how smooth the animation will be with this technique.

[Minoru]

What's wrong with sprites approach? Why this one is better? I'm
confused.

Regards,
Alexander Batischev

[rexim]

I understand your confusion. Let me explain everything once I'm home. :)
07.09.2015 16:39 пользователь "Alexander Batischev" <
notifications@github.com> написал:

What's wrong with sprites approach? Why this one is better? I'm
confused.

Regards,
Alexander Batischev

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Reply to this email directly or view it on GitHub
#9 (comment).

[rexim]

We've already discussed this with @Minoru in the chat. A little bit later I'll put the notes of that conversation here.

[rexim]

In our current approach we insert N x M images into the buffer on each game tick. It's a pretty good approach but it has its own limitations. For example game objects can move only discretely from on cell to another. I suggest another approach where we use only one image inside of an Emacs buffer as a canvas. It gives as pixel level control over the game's frame. With this control we can implement really smooth transitions. Here is how it will look: http://www.youtube.com/watch?v=lab6cpT3HhA

[rexim]

But I'm not going to implement this in the 5th Tsoding. Such thing has to be properly planned. On the 5th Tsoding I'll focus on #32

[rexim]

All the source code that I used in the video above I've put to the one-image-canvas branch. Fill free to play with it if you want. :)

[rexim]

Since we know this technique is possible I close the issue.

[rexim]

Checked this stuff on Windows 8.1, Emacs 24.5. Works good too and consumes even less CPU than on my Ubuntu (25% vs 30%)