another question not really related to Uscript for u guys, how do the engine transform a rotator into a vector when we use rotator(MyVector) ?
Rotator to Vector ?
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I think he more means like we onces explained how normal, and VSize could work internaly.
But I have no clue how they do rotator<->vector stuff.
But I have no clue how they do rotator<->vector stuff.
Well, vector to rotator casting uses trigonometric functions to calculate the rotator's Yaw component from the vector's X and Y components, while the rotator's Pitch component might be calculated from the normalized vector's Z component somehow.
I didn't figure out Pitch yet, but Yaw can be calculated through something like this:
Here "V * vect(1,1,0)" is a component multiplication, i.e. for this special case the vector is projected onto the X-Y plane and that projected vector's length is used.
Some standard vector to rotator conversions are:
vect(1,0,0) -> rot(0,0,0)
vect(0,1,0) -> rot(0,16383,0)
vect(0,0,1) -> rot(16383,0,0)
I didn't figure out Pitch yet, but Yaw can be calculated through something like this:
Code:
if ( V.X == 0 && V.Y > 0 )
R.Yaw = 16383;
else if ( V.X == 0 && V.Y > 0 )
R.Yaw = 49151;
else if ( V.X != 0 ) {
F = ACos(V.X / VSize(V * vect(1,1,0))) * 32768 / Pi;
if ( V.Y > 0 )
R.Yaw = F;
else
R.Yaw = 65536 - F;
}Some standard vector to rotator conversions are:
vect(1,0,0) -> rot(0,0,0)
vect(0,1,0) -> rot(0,16383,0)
vect(0,0,1) -> rot(16383,0,0)
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Its called Linear Algebra(part Three-dimensional Geometry), and pray to god you dont have to learn it like i did.Daid303 said:
http://www.numbertheory.org/book/
http://www.numbertheory.org/book/cha8.pdf
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It is as the wise Wormbo said! Rotator -> Vector just transforms the x-axis by that rotator and gives it to you. So a rotator of (0,0,0) gives you a vector of (1,0,0) etc. Obviously this throws away the roll of the rotator so if you go rotator -> vector -> rotator it wont necessarily be the same.
Vector -> Rotator just figures out a pitch and yaw to point the x axis in the direction you give. I believe the roll will always be zero after this.
If I had the C++ code handy I'd post exactly how it works, but I'm afraid I don't...
Vector -> Rotator just figures out a pitch and yaw to point the x axis in the direction you give. I believe the roll will always be zero after this.
If I had the C++ code handy I'd post exactly how it works, but I'm afraid I don't...