Need helping finding an angle
Another person on the OpenGL forum told me that to find an angle between two vectors I can use:
angle = arcos( v1•v2 / |v1||v2| )
where • is the product | | is the magnituted. The only thing is that I don't know how to get the prodcut.
What I am trying to accomplish is to rotate an object so it is looking where it is going.
Thanks Jake
Maths - Vectors
the dot product is described at about the middle of that page.
(the links listed in the forum faq have that info too, but that's another story >>;
the dot product is described at about the middle of that page.
(the links listed in the forum faq have that info too, but that's another story >>;
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