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Author Topic: moveTo method for Vector2  (Read 2601 times)

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MrOnlineCoder

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moveTo method for Vector2
« on: October 01, 2016, 08:17:21 pm »
Hello. Very often in games there is need to move object A to object B smoothly. Can this function be implemented in SFML? Something like this:
pointA.moveTo(pointB, 1f);
//=> pointA is now closer to pointB by 1 pixel
 

Laurent

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Re: moveTo method for Vector2
« Reply #1 on: October 01, 2016, 08:35:10 pm »
It's not so common to move by one pixel. And your solution wastes CPU cycles because you recompute (pointB - pointA) for every pixel to move.

What is more common is to store a velocity and compute the move with the elapsed time.

pointA += velocity * elapsed.asSeconds();
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MrOnlineCoder

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Re: moveTo method for Vector2
« Reply #2 on: October 01, 2016, 09:23:45 pm »
1 pixel I used just for example  ;)

Hapax

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Re: moveTo method for Vector2
« Reply #3 on: October 04, 2016, 05:58:41 pm »
You can interpolate the two positions. To move a specific amount, you could multiply by a unit vector of the path.
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