xoctan657 Posted April 3, 2009 Share Posted April 3, 2009 hi when i saw some tutoial the instructor used the rotate node in POP and say that it node will give us a matrix rotate and in houdini i see that the value it is not a float and not vector , it is matrix, what is that mean. and this node rotate in POP i can't understand what it does it take an axis and then make the particcles rotate about it or not ? and where is the raduis for rotation . ..................... Quote Link to comment Share on other sites More sharing options...
kubabuk Posted April 3, 2009 Share Posted April 3, 2009 Generally speaking matrix is a multidimensional array which stores some values (mostly positions in space). Operations on matrices is a tool commonly used in CG to calculate objects' translations (transforms, rotations, scaling). I would start from wikipedia or google to get a basic understanding. http://en.wikipedia.org/wiki/Matrix_rotation cheers, kuba Quote Link to comment Share on other sites More sharing options...
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