Twaining a value in Lua
How can I do it? I want to change the time from one to the other at a time. Bearing in mind also that it would be nice to have "lightness" at the beginning and at the end.
I know I shouldn't really be asking, but I tried myself and I got stuck. Suppose that in order to trigger the delay, you need to call the wait (time) function.
One simple approach that might work for you is unit circle interpolation:
To do this, you simply evaluate the points along the circle, which provides a fairly smooth movement as well as lightness and lightness. You can control the speed of the interpolation by changing how quickly you change the angle.
Assuming you are doing one-dimensional interpolation (i.e. simple scalar interpolation like 3.5 to 6.9 or whatever), it would be convenient to use the Y values from -spi; / 2 to π / 2. They are given by the sine function, all you have to do is apply the appropriate scaling:
angle = -math.pi / 2
start = 3.5
end = 6.9
radius = (end - start) / 2
value = start + radius + radius * math.sin(angle)
I'm not 100% sure if it's legal Lua, haven't tested it. If not, it is probably trivial to convert.
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You can have a look at the Tweener ActionScript library for inspiration.
For example, you can take the required equations here .
If you need more help, please ask.
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