Alan Watt's 3D Computer Graphics: Errors

Epsilon-Delta

Alan Watt's 3D Computer Graphics: Errors Tue, Nov 22. 2011

I really like Alan Watt's book as a general introduction to the topic, anyway there's a huge error on page 7 (3rd edition) , where the basics of Matrix operations are described. Rotation around an arbitrary point in 2D space is done by translating to the origin (T1) , rotating (R) , then translating back (T2) . Since Watts' book uses column vectors (like GL, as opposed to row vectors / DirectX) thats basically T2 R T1 x for a given vector x. Well, Alan Watts' book shows T1 R T2 x :-(

Still a good book.
Posted by Amanjit Singh Gill in Math Comments: (0) Trackbacks: (0)

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