How do I rotate somthing on the y-axis?
How do i rotate somthing on the y-axis?
How do I rotate somthing on the y-axis?
4 posts
3D?
If you mean 3D, the formula is (in matrixform):
[ x' ] [ c 0 s 0 ] [ x ]
[ y' ] = [ 0 1 0 0 ] [ y ]
[ z' ] [ -s 0 c 0 ] [ z ]
[ 1 ] [ 0 0 0 1 ] [ 1 ]
With c and s being the cosine and sine of the angle to rotate.
If you don't know matrixmath, the formula above expands into:
x' = c*x + s*z;
y' = y;
z' = -s*x + c*z;
If you mean 3D, the formula is (in matrixform):
[ x' ] [ c 0 s 0 ] [ x ]
[ y' ] = [ 0 1 0 0 ] [ y ]
[ z' ] [ -s 0 c 0 ] [ z ]
[ 1 ] [ 0 0 0 1 ] [ 1 ]
With c and s being the cosine and sine of the angle to rotate.
If you don't know matrixmath, the formula above expands into:
x' = c*x + s*z;
y' = y;
z' = -s*x + c*z;
Re: 3D?
Originally posted by UnConeDtake off the 4th rows and columns 😛
If you mean 3D, the formula is (in matrixform):
[ x' ] [ c 0 s 0 ] [ x ]
[ y' ] = [ 0 1 0 0 ] [ y ]
[ z' ] [ -s 0 c 0 ] [ z ]
[ 1 ] [ 0 0 0 1 ] [ 1 ]
I used homogenous coordinates which are more common in 3D because you can write any transformation with them... (e.g. translation is a 4x4 with the last column being the 3 coordinates of the new origin and a 1.) The last coordinate should probably be t' and t, but I wrote 1 to show that it's of no significance here.