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
76
77
78
|
-- Symbol names
local names_A =
{
en = "Ammeter",
cs = "Ampérmetr",
sk = "Ampérmeter"
}
local names_V =
{
en = "Voltmeter",
cs = "Voltmetr",
sk = "Voltmeter"
}
local names_ohm =
{
en = "Ohmmeter",
cs = "Ohmmetr",
sk = "Ohmmeter"
}
-- Render area in base units (X1, Y1, X2, Y2)
local area = {-2, -2, 2, 2}
-- Terminal points
local terminals = {{-2, 0}, {2, 0}, {0, -2}, {0, 2}}
-- Rendering
local render_A = function (cr)
-- The circle
cr.arc (0, 0, 2, 0, math.pi * 2)
-- The letter A
cr.move_to (-0.4, 0.5)
cr.line_to (0, -0.5)
cr.line_to (0.4, 0.5)
cr.move_to (-0.3, 0.25)
cr.line_to (0.3, 0.25)
cr.stroke ()
end
local render_V = function (cr)
-- The circle
cr.arc (0, 0, 2, 0, math.pi * 2)
-- The letter V
cr.move_to (-0.4, -0.5)
cr.line_to (0, 0.5)
cr.line_to (0.4, -0.5)
cr.stroke ()
end
local render_ohm = function (cr)
-- The circle
cr.arc (0, 0, 2, 0, math.pi * 2)
-- The capital letter omega
cr.move_to (-0.5, 0.5)
cr.line_to (-0.15, 0.5)
cr.curve_to (-0.15, 0.5, -0.4, 0.3, -0.4, 0)
cr.curve_to (-0.4, -0.25, -0.25, -0.5, 0, -0.5)
cr.curve_to (0.25, -0.5, 0.4, -0.25, 0.4, 0)
cr.curve_to (0.4, 0.3, 0.15, 0.5, 0.15, 0.5)
cr.line_to (0.5, 0.5)
cr.stroke ()
end
-- Register the symbols
logdiag.register ("Ammeter", names_A, area, terminals, render_A)
logdiag.register ("Voltmeter", names_V, area, terminals, render_V)
logdiag.register ("Ohmmeter", names_ohm, area, terminals, render_ohm)
|
