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
|
require "narray"
require "nimage_c"
def NImage.show image
r1 = image.min
r2 = image.max
b = NArray.byte(*image.shape)
b[]= (image.to_f-r1)/(r2-r1)*(NImage.ncolors-1)
NImage.new b.to_s, *b.shape
end
def NImage.standard_color
ncol = 32/4
t = NArray.byte(ncol).indgen! * (255.0/ncol)
r = NArray.byte(ncol,4)
g = NArray.byte(ncol,4)
b = NArray.byte(ncol,4)
# Color map
r[0..-1,1] =
g[0..-1,2] =
b[0..-1,0] =
b[-1..0,1] =
b[0..-1,3] = t
r[0..-1,2] =
r[0..-1,3] =
g[0..-1,3] = 255
NImage.colormap r.to_s, g.to_s, b.to_s
end
# Initalize colormap
#NImage.standard_color
#
# TEST TEST TEST
#
if __FILE__ == $0
x = NArray.sfloat(200,1).indgen!(-100)/50*3.1415
y = NArray.sfloat(1,200).indgen!(-100)/50*3.1415
z = NMath.cos(x) * NMath.sin(y)
v = NImage.show z
print "Hit return key..."
STDIN.getc
v.close
end
|
