blob: 661354564fa7f093c36aac96cdb08d8ec687fb53 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
# fieldviz: A electric/magnetic field integrator
This program allows the calculation of the electric or magnetic field
in a region with arbitrary charge/current distributions.
# Installation
You will need my math library from
https://github.com/built1n/libfml/. Build and install that before
proceeding.
Then build using cmake:
mkdir build
cd build
cmake ..
make
This should give you a `fieldviz` executable. Run in-place or do
sudo make install
To install system-wide.
# Usage
It's all command-line based:
Use the "add" command along with its requisite parameters to add a
current or charge element.
For example,
add I 10 line 0 0 0 1 0 0
will add a 10 amp current on a line from <0 0 0> to <1 0 0>. Different
shapes are possible, including circular arcs, solenoids, and toroids. Each will need different parameters, which are documented below.
From there, you can either "draw" the current/charge distributions, or
plot the electric/magnetic fields they produce with the "field" command.
## Curve parameters
1. Line segment
line <a> <b>
Pretty self-explanatory.
2. Arc
arc <center> <radius> <normal> angle
center, radius, and normal are all vectors. Normal should be
normalized, or bad things might happen. Angle is the extent in radians.
3. Solenoid
solenoid <center> <radius> <normal> angle pitch
The first four parameters have the same meaning as they do with
arcs. The pitch parameter controls the linear distance between
successive turns.
4. Toroid
toroid <center> <radius> <maj_normal> min_radius maj_angle pitch
center and radius have the same meaning as before. See the diagram
below for the meanings of the rest.
NOTE: pitch is angular distance between successive turns, or at least
it's supposed to be. Currently there's a bug somewhere.
|
