A simple electric circuit
the output produced by Box
To run this example you will need the following file(s): ./wheatstone.box.
If the example requires more than one file, then you should put
them into the same directory.
You can then launch Box with box -l g ./wheatstone.box.
// This is not a real Wheatstone bridge.
// We replace some of the resistors with other components, just to make
// the thing more interesting!
wheatstone = Window[
d1 = 20.0 // d1 = half diagonal
p1 = (0, -d1), p2 = (d1, 0), p3 = (0, d1), p4 = (-d1, 0)
BBox[d2 = 22.0, (-d2, -d2), (d2, d2)]
// Places the four components.
// Each component has two connections. Here we want to rotate and translate
// ("rt") a resistor such that the first of its terminals is near to
// the point p1 and the second one is near to p2.
r12 = Put[resistor, "rt", Near[0, p1], Near[1, p2]]
// We proceed in a similar way for the other components:
r23 = Put[diode, "rt", Near[0, p2], Near[1, p3]]
r34 = Put[inductance, "rt", Near[0, p3], Near[1, p4]]
r41 = Put[resistor, "rt", Near[0, p4], Near[1, p1]]
// Actually show the components
r12, r23, r34, r41
// Connecting the four resistors
Lines[0.4, p1, r12.Get; r12.Get, p2; p2, r23.Get; r23.Get, p3;
p3, r34.Get; r34.Get, p4; p4, r41.Get; r41.Get, p1;]
// Drawing small circles on the nodes
// Here you see how a single Circle instruction can be used to draw many
// circles. To start a new circle one should use the separator ";" and
// specify only the quantities that changed with respect to the previous
// circle. Here we change only the center, so we need to specify the radius
// only once!
Circles[0.8, p1; p2; p3; p4]
wheatstone.Save["wheatstone.png", Window["rgb24", .Res[Dpi]]]