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Action:
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Returns TRUE if two lines intersect.
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Filename:
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kern/kern_scm/law_scm.cxx
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Syntax:
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(law:line-line-interset point1 gvector1 point2 gvector2)
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Arg Types:
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point1
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position
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gvector1
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gvector
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point2
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position
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gvector2
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gvector
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Returns:
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boolean
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Description:
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Returns TRUE if the line given by
point1 + t * gvector1 intersects the line
point2 + s * gvector2. Also prints out the parameter values of the two nearest nearest points.
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point1 specifies a position on the first line.
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gvector1 specifies the direction of the first line.
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point2 specifies a position on the second line.
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gvector2 specifies the direction of the second line.
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Example:
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; law:line-line-intersect
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; Create a cylinder
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; intersect at (1 2 3)
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(law:line-line-intersect (position 4 4 4)
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(gvector 3 2 1) (position 1 10 3)
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(gvector 0 -.3 0))
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; Lines intersect at (1.000000 2.000000
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;
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3.000000)
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; Param values are:
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;
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param0 at -1.000000
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;
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param1 at 26.666667
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;; #t
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; no intersection
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(law:line-line-intersect (position 5 4 4)
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(gvector 3 2 1) (position 3 10 1)
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(gvector 0 -.3 0))
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; Param values are:
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;
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param0 at -0.900000
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;
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param1 at 26.000000
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;; #f
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