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Topic: LightPos as Vector4?



  
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   LightPos as Vector4?
 Poster : Voldos
 Posts: 3
 Country : UK
 City: Plymouth

  
Posted by Voldos on 02/04/2008 at 08:17:32
Hey can someone explain to me why we use a vector4 for the light position?
(X,Y,Z,?)
what is the fourth value used for? it seems no matter what I change it to, it has no effect. Is it actualy used?

Thanks
 Poster : Voldos
 Posts: 3
 Country : UK
 City: Plymouth

  
Posted by Voldos on 02/04/2008 at 09:38:26
OK after reading through the later chapters I think I figured it out. Am I right in thinking that the fourth value is W. I.E we are using Homogenous matrices?
Though I'm still unclear as to what advantage this brings...

  
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