Beyond3D Forum

trinibwoy · 07-Jan-2006, 16:57

Why do you have to divide by 4 to get vertex rate numbers?

Vertex rate = clock x #VS / 4 ??

Chalnoth · 07-Jan-2006, 17:01

Because one VS unit is capable of one 4-component dot product per clock. One vertex transformation is a 4x4 matrix multiplying a 4-vector, which requires 4 dot products.

trinibwoy · 07-Jan-2006, 17:08

Quote:

Originally Posted by Chalnoth

Because one VS unit is capable of one 4-component dot product per clock. One vertex transformation is a 4x4 matrix multiplying a 4-vector, which requires 4 dot products.

Always hated matrix math. Thanks a lot!

07-Jan-2006, 16:57	#1
trinibwoy Meh Join Date: Mar 2004 Location: New York Posts: 9,809	Vertex rate calculation Why do you have to divide by 4 to get vertex rate numbers? Vertex rate = clock x #VS / 4 ?? __________________ What the deuce!?

07-Jan-2006, 17:01	#2
Chalnoth Join Date: May 2002 Location: New York, NY Posts: 12,678	Because one VS unit is capable of one 4-component dot product per clock. One vertex transformation is a 4x4 matrix multiplying a 4-vector, which requires 4 dot products. __________________ April 20, 1979 - America must never forget.

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