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[umen]

Hello all
i try to find the right formula to mimic the smooth none grid movement of the stihter io snake  .
i can do it manually to save each point the "head" movement  went and do some interpolation in between its body parts but it is very error prone.
also i find this : http://www.emanueleferonato.com/2014/06/10/html5-string-avoider-game-made-with-phaser/
which is not working in my case but do show something similar
here is a picture to express what i want to do :


any idea how to do it right ?
Thanks!

[oahda]

Maybe use a sine wave and play with the settings.

Without considering rotation, assuming the snake is moving to the right as in your illustration, only the y would be affected by the sine wave. The x might be used as an input, but I don't know how good that would look when stopping and such. But maybe!

You'd have something like this (pseudocode):

Code:

foreach (segment in segments)
    segment.y = sin(segment.x);

Variations would include multiplying the sine function's input by some factor, and/or multiplying the result of the sine function by some factor. The former will affect the intensity of the waves and the latter how much each segment is offset on the y axis.

If you want to make this work for any angle, you'll have to bring in some linear algebra.

[umen]

Thanks , well I need it to any direction

[oahda]

The other most recent thread is relevant to that:

https://forums.tigsource.com/index.php?topic=58121.0

[umen]

I asked , but it is not the same

[oahda]

Oops, didn't realise that was your thread too.

I suggest you read these:

http://blog.wolfire.com/2009/07/linear-algebra-for-game-developers-part-1/

http://blog.wolfire.com/2009/07/linear-algebra-for-game-developers-part-2/

http://blog.wolfire.com/2010/07/Linear-algebra-for-game-developers-part-3/