Inside is determined by the value of a Dot product function (it's a node function in UE4 BP) The Dot Product takes the relationship between to vectors (Player and Spline point's right (y) vector) and returns a number between -1 and 1. 1 means left of the point and therefore inside and -1 means on the right side of the spline point's right vector and therefore outside. 0 would be exactly on top of each other.
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Posted by2 years ago
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Help: Physics along a spline?
Hi guys, I'm having some trouble with moving a craft along a spline.
It's a side scroller Lunar Lander type game except using 3 dimensions so it can turn corners etc...
I have seen tutorials for following a spline as a character, where left and right increase and decrease the Distance along Spline.
And have managed to do it by finding the closest location on spline to world location but this doesn't work particularly well with the physics as it speeds up on bends and any bend over 90 degrees is a no no.
Essentially what I would like to do is replace Y with a spline, I have done this on paper and it worked until I started thinking about collisions... Now the whole idea is pointless as crashing is kind of a big deal.
Would anyone be able to help please? It's driving me crazy and I seem to be writing off a notepad a day.
Thanks in advance!
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