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Action:
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Reverse evaluates a position on a parametric surface.
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Filename:
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kern/kern_scm/surf_scm.cxx
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Syntax:
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(surface:point-perp srf pos)
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Arg Types:
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srf
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surface
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pos
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position pair (position
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point_on_surface gvector
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Returns:
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boolean
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Description:
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Given a surface and a position on the surface, this extension returns the surface position and gvector.
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srf specifies a parametric surface.
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pos specifies a position on the surface.
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Example:
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; surface:point-perp
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; Create a conical surface.
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(define cone1(face:cone (position 20 20 4)
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(position 20 20 8)2.5 0 0 360 0.6))
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;; cone1
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; Demonstrate the C++ function surface::point_perp()
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; through the Scheme interface.
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(surface:point-perp (surface:from-face cone1)
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(position 22 20 2.5))
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;; (#[position 23.0337078651685 20 3.14606741573034] ;; #[gvector 0.847998304005088 0 0.52999894000318]
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;; #[par-pos -0.402799194402416 0])
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