diff options
Diffstat (limited to 'Master/texmf-dist/doc/latex/mandi/vdemo.py')
-rw-r--r-- | Master/texmf-dist/doc/latex/mandi/vdemo.py | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/Master/texmf-dist/doc/latex/mandi/vdemo.py b/Master/texmf-dist/doc/latex/mandi/vdemo.py new file mode 100644 index 00000000000..b50f0c35eea --- /dev/null +++ b/Master/texmf-dist/doc/latex/mandi/vdemo.py @@ -0,0 +1,22 @@ +from __future__ import print_function, division +from visual import * + +giant = sphere(pos=vector(-1e11,0,0),radius=2e10,mass=2e30,color=color.red) +giant.p = vector(0, 0, -1e4) * giant.mass + +dwarf = sphere(pos=vector(1.5e11,0,0),radius=1e10,mass=1e30,color=color.yellow) +dwarf.p = -giant.p + +for a in [giant, dwarf]: + a.orbit = curve(color=a.color, radius=2e9) + +dt = 86400 +while 1: + rate(100) + dist = dwarf.pos - giant.pos + force = 6.7e-11 * giant.mass * dwarf.mass * dist / mag(dist)**3 + giant.p = giant.p + force*dt + dwarf.p = dwarf.p - force*dt + for a in [giant, dwarf]: + a.pos = a.pos + a.p/a.mass * dt + a.orbit.append(pos=a.pos) |