Re: How draw 3D Arrows?
- To: mathgroup@smc.vnet.net
- Subject: [mg11278] Re: [mg11237] How draw 3D Arrows?
- From: Sean Ross <seanross@worldnet.att.net>
- Date: Wed, 4 Mar 1998 01:39:32 -0500
- References: <199803030411.XAA02329@smc.vnet.net.>
Terry Harter wrote:
>
> Hi All;
> While I realize that the 'Arrow' package of Mathematica can draw
> *two-dimensional" arrows, the package fails at giving a 3D arrow.
> Anyone have any ideas or suggestions? Say I have 2, distinct 3-dim
> points {a,b,c} and {x,y,z}, how do I then draw a 3-dim arrow from
> {a,b,c} to {x,y,z} with the "head" of the arrow at {x,y,z}? I could
> find nothing on this in MathSource. Many thanks in advance! .....Terry
Not to solve your problem, but unless you have a holographic projection
system, there is no such thing as a three dimensional arrow. You want
a 2-D arrow on top of a 3-D graph. You can use the command Show to
combine a 2-D arrow with a 3-D graph such as in:
Show[Plot3D[Exp[-x^2+y^2],{x,-2,2},{y,-2,2}],Graphics[Arrow[{0,0},{1,1}]]]
It looks like you will have to experiment with the coordinate system to
get the arrow in the right place and get whatever options you wanted on
the 3-D plot.
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- References:
- How draw 3D Arrows?
- From: tharter@nswc.navy.mil (Terry Harter)
- How draw 3D Arrows?