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Action:
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Gets the dot product of two gvector.
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Filename:
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kern/kern_scm/gvec_scm.cxx
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Syntax:
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(gvector:dot gvector1 gvector2)
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Arg Types:
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gvector1
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gvector
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gvector2
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gvector
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Returns:
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real
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Description:
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If the
i, j, k components of vector
a are <a1,
a2,
a3>, and the
i, j, k components of vector
b are <b1,
b2,
b3>, the dot product
a .
b is:
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gvector1
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=
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(a1 a2 a3) = a
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gvector2
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=
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(b1 b2 b3) = b
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a . b
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=
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(a1*b1 + a2*b2 + a3*b3)
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a . b
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=
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|a||b|cosq
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; where q is the angle
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; between a and b
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The result of a dot product is a scalar value.
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gvector1 specifies the first vector.
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gvector2 specifies the second vector.
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Example:
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; gvector:dot
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; Compute the dot product of two gvectors.
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(gvector:dot (gvector 3 5 1) (gvector 2 4 7))
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;; 33
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