Hi, guys! My best wishes for a Happy New year!
So I have a small cluster of points in space and I wanted to draw a wireframe. After thinking the problem an undetermined time, I finally got a working function to do the job. Guess what: a subsequent search in the collaboratory let me know that Tom had solved the problem many years before, he he he.
So this time I decided search first and program after 🙂
I have a small group of points in space that are generated by a function. I don't know before hand where is each point in space. Generating all the possible connections is easy
but the internal lines are distracting and I prefer if possible not to draw them
Now I'm facing the job of programming a function to find the enclosing polyhedron of a cluster of points. I'm still in the pre-production stage :), i.e. exchanging ideas with my pillow.
So far I know how to detect the outer faces of the polyhedron (using basic vector algebra) but it takes combin(n,3)*(n-3) checks, and I still need to decide how to manage faces of more than 3 coplanar points.
Well, any hint is welcome. Please don't refer me to amazing graphics etc, I'm using Mathcad 2001 and I can only open the oldest sheets.
Saludos,
Al
So I have a small cluster of points in space and I wanted to draw a wireframe. After thinking the problem an undetermined time, I finally got a working function to do the job. Guess what: a subsequent search in the collaboratory let me know that Tom had solved the problem many years before, he he he.
So this time I decided search first and program after 🙂
I have a small group of points in space that are generated by a function. I don't know before hand where is each point in space. Generating all the possible connections is easy
but the internal lines are distracting and I prefer if possible not to draw them
Now I'm facing the job of programming a function to find the enclosing polyhedron of a cluster of points. I'm still in the pre-production stage :), i.e. exchanging ideas with my pillow.
So far I know how to detect the outer faces of the polyhedron (using basic vector algebra) but it takes combin(n,3)*(n-3) checks, and I still need to decide how to manage faces of more than 3 coplanar points.
Well, any hint is welcome. Please don't refer me to amazing graphics etc, I'm using Mathcad 2001 and I can only open the oldest sheets.
Saludos,
Al
On 1/10/2010 11:23:58 AM, jmG wrote:
>You may think in term of the
>surface plot operator.
>Just as a conceptual approach
>[hint].
Thanks Jean, I already finished the damn function.
Because I know now how to find the faces of the polyhedron, other options are available, as calculating the area, volume and center of mass. Also making a surface plot, but I still need to understand how is coded the data. I will study your attached sheet as well as an old sheet to draw a cube, but not yet. My Dec vacation already ended and I have few time to play with MC.
Saludos,
Al
>You may think in term of the
>surface plot operator.
>Just as a conceptual approach
>[hint].
Thanks Jean, I already finished the damn function.
Because I know now how to find the faces of the polyhedron, other options are available, as calculating the area, volume and center of mass. Also making a surface plot, but I still need to understand how is coded the data. I will study your attached sheet as well as an old sheet to draw a cube, but not yet. My Dec vacation already ended and I have few time to play with MC.
Saludos,
Al
