a little speed issue...

instead of
Code:

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 vec_sub(my.skill4,vector(Trees[TreeArrRows*i],Trees[TreeArrRows*i+1],Trees[TreeArrRows*i+2])); 

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you can use
Code:

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 vec_sub(my.skill4,Trees[TreeArrRows*i+0]); 

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if i am not wrong...
the vector command is very slow, i noticed..