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seen May 19 at 17:01

Jul
8
answered pattern of moving electrons in wire under AC
Jul
3
awarded  Scholar
Jul
3
accepted Rotation of parabola
Jul
3
comment Rotation of parabola
yea, that makes sense to me. Thanks for the help
Jul
3
comment Rotation of parabola
And it has to be an arbitrary axis, which makes the algebra using a rotation matrix pretty bad.
Jul
3
comment Rotation of parabola
ray tracing because I am changing a bunch of parameters and am trying to optimize concentration numerically.
Jul
3
comment Rotation of parabola
powerfromthesun.net/Book/chapter09/chapter09_files/image011.jpg The bold lines are what I want to define in matlab as a reflective surface. Only problem is parabolas have tilted axes. So I would like to rotate and then select for the lower term of the quadratic (making it a function).
Jul
3
comment Rotation of parabola
Thanks for the response, btw
Jul
3
comment Rotation of parabola
so from the rotated parameterized matrix at the end, converting this back to x and y simply gives [xcos() + ysin(), -xsin() + ycos()], which is just [x,y] rotated by theta, correct? Is there a specific way to convert this back into cartesian to be useful?
Jul
3
asked Rotation of parabola