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geom3d[point] - define a point
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Calling Sequence
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point(P, Px, Py, Pz)
point(P, [Px, Py, Pz])
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Parameters
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P
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the name of the point
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Px
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the x-coordinate
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Py
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the y-coordinate
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Pz
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the z-coordinate
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Description
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A point is represented as a dot. It has position only, and has no length, width, or thickness.
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A point P is represented by its ``x'', ``y'', and ``z'' coordinates.
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To access the information relating to a point P, use the following function calls:
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form(P)
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returns the form of the geometric
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object (i.e., point3d if P is a point).
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coordinates(P)
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returns [Px,Py,Pz].
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xcoord(P)
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returns Px which is the x-coordinate
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of P.
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ycoord(P)
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returns Py which is the y-coordinate
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of P.
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zcoord(P)
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returns Pz which is the z-coordinate
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of P.
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detail(P)
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returns a detailed expression of the
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point P.
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The command with(geom3d,point) allows the use of the abbreviated form of this command.
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Examples
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>
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![[a, b, c]](/support/helpjp/helpview.aspx?si=4868/file04020/math200.png)
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>
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>
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