Class: Pxlsrt::Seed

Inherits:
Object
  • Object
show all
Defined in:
lib/pxlsrt/seed.rb

Overview

Plant seeds, have them spiral out and sort.

Class Method Summary collapse

Class Method Details

.seed(input, o = {}) ⇒ Object

The main attraction of the Seed class. Returns a ChunkyPNG::Image that is sorted according to the options provided. Will raise any error that occurs.



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
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
 
# File 'lib/pxlsrt/seed.rb', line 17

def self.seed(input, o = {})
	startTime = Time.now
	defOptions = {
		:reverse => false,
		:smooth => false,
		:method => "sum-rgb",
		:verbose => false,
		:trusted => false,
		:middle => false,
		:random => false,
		:distance => 100,
		:threshold => 0.1
	}
	defRules = {
		:reverse => :anything,
		:smooth => [false, true],
		:method => Pxlsrt::Colors::METHODS,
		:verbose => [false, true],
		:trusted => [false, true],
		:middle => :anything,
		:random => [false, {:class => [Fixnum]}],
		:distance => [false, {:class => [Fixnum]}],
		:threshold => [{:class => [Float, Fixnum]}]
	}
	options = defOptions.merge(o)
	if o.length == 0 or options[:trusted] == true or (options[:trusted] == false and o.length != 0 and Pxlsrt::Helpers.checkOptions(options, defRules) != false)
		if input.class == String
			Pxlsrt::Helpers.verbose("Getting image from file...") if options[:verbose]
			if File.file?(input)
				if Pxlsrt::Colors.isPNG?(input)
					input = ChunkyPNG::Image.from_file(input)
				else
					Pxlsrt::Helpers.error("File #{input} is not a valid PNG.") if options[:verbose]
					raise "Invalid PNG"
				end
			else
				Pxlsrt::Helpers.error("File #{input} doesn't exist!") if options[:verbose]
				raise "File doesn't exit"
			end
		elsif input.class != String and input.class != ChunkyPNG::Image
			Pxlsrt::Helpers.error("Input is not a filename or ChunkyPNG::Image") if options[:verbose]
			raise "Invalid input (must be filename or ChunkyPNG::Image)"
		end
		Pxlsrt::Helpers.verbose("Seed mode.") if options[:verbose]
		Pxlsrt::Helpers.verbose("Creating Pxlsrt::Image object") if options[:verbose]
		png = Pxlsrt::Image.new(input)
		traversed = [false] * (png.getWidth * png.getHeight)
		count = 0
		seeds = []
		if options[:random] != false
			Pxlsrt::Helpers.progress("Planting seeds", 0, options[:random]) if options[:verbose]
			for s in (0...options[:random])
				x = (0...png.getWidth).to_a.sample
				y = (0...png.getHeight).to_a.sample
				seeds.push({
					:spiral => Pxlsrt::Spiral.new(x, y),
					:pixels => [png[x, y]],
					:xy => [{:x => x, :y=>y}],
					:placed => true,
					:retired => false,
					:anchor => {
						:x => x,
						:y => y
					}
				})
				Pxlsrt::Helpers.progress("Planting seeds", s + 1, options[:random]) if options[:verbose]
			end
		else
			Pxlsrt::Helpers.progress("Planting seeds", 0, png.getWidth * png.getHeight) if options[:verbose]
			kernel = [[-1, -1, -1], [-1, 9, -1], [-1, -1, -1]]
			i = (png.getWidth + png.getHeight - 2) * 2
			for y in (1...(png.getHeight - 1))
				for x in (1...(png.getWidth - 1))
					sum = 0
					for ky in ((-1)..1)
						for kx in ((-1)..1)
							sum += kernel[ky + 1][kx + 1] * (ChunkyPNG::Color.r(png[x + kx, y + ky]))
						end
					end
					if sum < options[:threshold]
						seeds.push({
							:spiral => Pxlsrt::Spiral.new(x, y),
							:pixels => [png[x, y]],
							:xy => [{:x => x, :y=>y}],
							:placed => true,
							:retired => false,
							:anchor => {
								:x => x,
								:y => y
							}
						})
					end
					i += 1
					Pxlsrt::Helpers.progress("Planting seeds", i, png.getWidth * png.getHeight) if options[:verbose]
				end
			end
			if options[:distance] != false
				Pxlsrt::Helpers.progress("Removing seed clusters", 0, seeds.length) if options[:verbose]
				results = []
				i = 0
				for current in seeds
					add = true
				  	for other in results
				    	d = Math.sqrt((current[:anchor][:x] - other[:anchor][:x]) ** 2 + (current[:anchor][:y] - other[:anchor][:y]) ** 2)
				    	add = false if d > 0 and d < options[:distance]
				  	end
				  	if add
					  	results.push(current)
					end
					i += 1
					Pxlsrt::Helpers.progress("Removing seed clusters", i, seeds.length) if options[:verbose]
				end
				seeds = results
			end
		end
		for r in (0...seeds.length)
			traversed[seeds[r][:anchor][:x] + seeds[r][:anchor][:y] * png.getWidth] = r
			count += 1
		end
		Pxlsrt::Helpers.verbose("Planted #{seeds.length} seeds") if options[:verbose]
		step = 0
		Pxlsrt::Helpers.progress("Watch them grow!", count, traversed.length) if options[:verbose]
		while count < traversed.length and seeds.length != 0
			r = 0
			retired = []
			for seed in seeds
				if !seed[:retired]
					n = seed[:spiral].next
					if n[:x] >= 0 and n[:y] >= 0 and n[:x] < png.getWidth and n[:y] < png.getHeight and !traversed[n[:x] + n[:y] * png.getWidth]
						seed[:pixels].push(png[n[:x], n[:y]])
						traversed[n[:x] + n[:y] * png.getWidth] = r
						seed[:xy].push(n)
						seed[:placed] = true
						count += 1
					else
						if seed[:placed] == true
							seed[:placed] = {
								:count => 1,
								:direction => seed[:spiral].direction,
								:cycle => seed[:spiral].cycles
							}
							case seed[:placed][:direction]
							when "up", "down"
								seed[:placed][:value] = seed[:spiral].pos[:y]
								seed[:placed][:valueS] = :y
							when "left", "right"
								seed[:placed][:value] = seed[:spiral].pos[:x]
								seed[:placed][:valueS] = :x
							end
						else
							seed[:placed][:count] += 1
							if seed[:spiral].cycles != seed[:placed][:cycle] and seed[:placed][:direction] == seed[:spiral].direction and seed[:placed][:value] == seed[:spiral].pos[seed[:placed][:valueS]]
								seed[:retired] = true
							end
						end
					end
				end
				r += 1
			end
			step += 1
			Pxlsrt::Helpers.progress("Watch them grow!", count, traversed.length) if options[:verbose]
		end
		Pxlsrt::Helpers.progress("Sort seeds and place pixels", 0, seeds.length) if options[:verbose]
		r = 0
		for seed in seeds
			spiral = Pxlsrt::Spiral.new(seed[:anchor][:x], seed[:anchor][:y])
			band = Pxlsrt::Helpers.handlePixelSort(seed[:pixels], options)
			i = 0
			for k in seed[:xy]
				png[k[:x], k[:y]] = band[i]
				i += 1
			end
			r += 1
			Pxlsrt::Helpers.progress("Sort seeds and place pixels", r, seeds.length) if options[:verbose]
		end
		endTime=Time.now
		timeElapsed=endTime-startTime
		if timeElapsed < 60
			Pxlsrt::Helpers.verbose("Took #{timeElapsed.round(4)} second#{ timeElapsed!=1.0 ? "s" : "" }.") if options[:verbose]
		else
			minutes=(timeElapsed/60).floor
			seconds=(timeElapsed % 60).round(4)
			Pxlsrt::Helpers.verbose("Took #{minutes} minute#{ minutes!=1 ? "s" : "" } and #{seconds} second#{ seconds!=1.0 ? "s" : "" }.") if options[:verbose]
		end
		Pxlsrt::Helpers.verbose("Returning ChunkyPNG::Image...") if options[:verbose]
		return png.returnModified
	else
		Pxlsrt::Helpers.error("Options specified do not follow the correct format.") if options[:verbose]
		raise "Bad options"
	end
end

.suite(inputFileName, outputFileName, o = {}) ⇒ Object

Uses Pxlsrt::Seed.seed to input and output from one method.



9
10
11
12
13
14
 
# File 'lib/pxlsrt/seed.rb', line 9

def self.suite(inputFileName, outputFileName, o={})
	kml = Pxlsrt::Seed.seed(inputFileName, o)
	if Pxlsrt::Helpers.contented(kml)
		kml.save(outputFileName)
	end
end