Sha256: 2ae0929aa5c282c5ae210cf60525d45db32fbc1ac0b3874617de57d0b9464f4c
Contents?: true
Size: 1.48 KB
Versions: 10
Compression:
Stored size: 1.48 KB
Contents
# Zoom.
#
# Move the cursor over the image to alter its position. Click and press
# the mouse to zoom and set the density of the matrix by typing numbers 1-5.
# This program displays a series of lines with their heights corresponding to
# a color value read from an image.
def setup
size 640, 360, P3D
no_fill
stroke 255
@nmx = 0.0
@nmy = 0.0
@sval = 1.0
@res = 5
@img = load_image "ystone08.jpg"
@img_pixels = []
(0...@img.height).each do |y|
@img_pixels << []
(0...@img.width).each do |x|
@img_pixels.last << @img.get(y, x)
end
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, 2.5
translate width/2 + @nmx * @sval - 100, height/2 + @nmy * @sval - 200, -50
scale @sval
rotate_z PI/9 - @sval + 1
rotate_x PI/@sval/8 - 0.125
rotate_y @sval/8 - 0.125
translate -width/2, -height/2
(0...@img.height).step(@res) do |y|
(0...@img.width).step(@res) do |x|
rr = red @img_pixels[y][x]
gg = green @img_pixels[y][x]
bb = blue @img_pixels[y][x]
tt = rr + gg + bb
stroke rr, gg, gg
line y, x, tt/10 - 20, y, x, tt/10
end
end
end
def key_pressed
k = key.to_i
@res = k if k > 0 && k < 6
end
Version data entries
10 entries across 10 versions & 1 rubygems