Sha256: 7ba38064a175626b7e1b86e5d29f4c78f9641cf82af4ae825700e91102cef17f
Contents?: true
Size: 1.28 KB
Versions: 6
Compression:
Stored size: 1.28 KB
Contents
#
# Zoom.
#
# Move the cursor over the image to alter its position. Click and press
# the mouse to zoom. This program displays a series of lines with their
# heights corresponding to a color value read from an image.
#
attr_reader :img, :img_pixels, :sval, :nmx, :nmy, :res
def setup
size(640, 360, P3D)
noFill
stroke(255)
@img = load_image('ystone08.jpg')
@img_pixels = []
@sval = 1.0
@res = 5
@nmx = 0
@nmy = 0
(0 ... img.height).each do |i|
inner = []
(0 ... img.width).each do |j|
inner << img.get(j, i)
end
img_pixels << inner
end
end
def draw
background(0)
@nmx += (mouse_x - nmx) / 20
@nmy += (mouse_y - nmy) / 20
if(mouse_pressed?)
@sval += 0.005
else
@sval -= 0.01
end
@sval = constrain(sval, 1.0, 2.0)
translate(width/2 + nmx * sval-100, height/2 + nmy*sval - 100, -50)
scale(sval)
rotate_z(PI / 9 - sval + 1.0)
rotate_x(PI / sval / 8 - 0.125)
rotate_y(sval / 8 - 0.125)
translate(-width/2, -height/2, 0)
(0 ... img.height).step(res) do |i|
(0 ... img.width).step(res) do |j|
rr = red(img_pixels[j][i])
gg = green(img_pixels[j][i])
bb = blue(img_pixels[j][i])
tt = rr + gg + bb
stroke(rr, gg, gg)
line(i, j, tt / 10 - 20, i, j, tt / 10 )
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems