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Action:
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Gets the angle (in radians) between two vectors or two unit vectors in the range 0 <= angle < 2
pi.
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Prototype:
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double angle_between (
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const SPAunit_vector& v1,
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// first vector
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const SPAunit_vector& v2,
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// second vector
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const SPAunit_vector& z
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// normal to plane
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=*(SPAunit_vector*)NULL_REF
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);
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double angle_between (
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const SPAvector& v1,
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// first vector
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const SPAvector& v2,
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// second vector
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const SPAunit_vector& z
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// normal to plane
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=*(SPAunit_vector*)NULL_REF
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);
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Includes:
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#include "kernel/acis.hxx"
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#include "kernel/geomhusk/geom_utl.hxx"
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#include "baseutil/vector/unitvec.hxx"
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#include "baseutil/vector/vector.hxx"
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Description:
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This function is overloaded and can accept two vectors or two unit vectors as arguments.
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The third vector is the plane in which the angle is measured, and is required. It also defines a direction, from the first to the second vector. To simply get the angle in 3-space, pass the normalized cross product of the two input vectors as the third vector.
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Library:
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kernel
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Filename:
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kern/kernel/geomhusk/geom_utl.hxx
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Effect:
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Read-only
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