convert matrix
Author
hi all,
I'm using the PhysX libraries for collision checking in my project but I come upon a problem...
I need to set the matrix of the visual object the same as the matrix of the PhysX actor and that's were it goes wrong :
my X-axis is the opposite of the one that PhysX uses so everything is mirrored.
for translations, this isn't a problem (just reverse the x value) but for the rotations it is..
so, how can something like this be done? I tried some stuff but it all doesn't seem to work :(
thx
PS.: I'm not using DirectX / OpenGL and trying to change the direction of the X-axis is NOT an option
This is off the top of my head, kind of a drive-by posting.
Create a scaling matrix M for x=-1, y=1, z=1. This is nice because M==M-1.
Given a rotation matrix R, R' = M*R*M.
I think that should work. If not, hope not too much time's wasted.
Create a scaling matrix M for x=-1, y=1, z=1. This is nice because M==M-1.
Given a rotation matrix R, R' = M*R*M.
I think that should work. If not, hope not too much time's wasted.
Author
Quote:Original post by Buckeye
This is off the top of my head, kind of a drive-by posting.
Create a scaling matrix M for x=-1, y=1, z=1. This is nice because M==M-1.
Given a rotation matrix R, R' = M*R*M.
I think that should work. If not, hope not too much time's wasted.
That worked perfectly :)
thank you very much :)
If I remember my math correctly, you can put the translation in there, too, and convert it all in one line.
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