module RubySketch # Processing compatible API # module Processing # @private DEG2RAD__ = Math::PI / 180.0 # @private RAD2DEG__ = 180.0 / Math::PI # Vector class. # class Vector include Comparable # Initialize vector object. # # @overload new() # @overload new(x) # @overload new(x, y) # @overload new(x, y, z) # @overload new(v) # @overload new(a) # # @param x [Numeric] x of vector # @param y [Numeric] y of vector # @param z [Numeric] z of vector # @param v [Vector] vector object to copy # @param a [Array] array like [x, y, z] # def initialize(x = 0, y = 0, z = 0, context: nil) @point = case x when Rays::Point then x.dup when Vector then x.getInternal__.dup when Array then Rays::Point.new x[0] || 0, x[1] || 0, x[2] || 0 else Rays::Point.new x || 0, y || 0, z || 0 end @context = context || Context.context__ end # Initializer for dup or clone # def initialize_copy(o) @point = o.getInternal__.dup end # Copy vector object # # @return [Vector] duplicated vector object # alias copy dup # Sets x, y and z. # # @overload set(x) # @overload set(x, y) # @overload set(x, y, z) # @overload set(v) # @overload set(a) # # @param x [Numeric] x of vector # @param y [Numeric] y of vector # @param z [Numeric] z of vector # @param v [Vector] vector object to copy # @param a [Array] array with x, y, z # # @return [nil] nil # def set(*args) initialize(*args) self end # Gets x value. # # @return [Numeric] x value of vector # def x() @point.x end # Gets y value. # # @return [Numeric] y value of vector # def y() @point.y end # Gets z value. # # @return [Numeric] z value of vector # def z() @point.z end # Sets x value. # # @return [Numeric] x value of vector # def x=(x) @point.x = x end # Sets y value. # # @return [Numeric] y value of vector # def y=(y) @point.y = y end # Sets z value. # # @return [Numeric] z value of vector # def z=(z) @point.z = z end # Returns the interpolated vector between 2 vectors. # # @overload lerp(v, amount) # @overload lerp(x, y, amount) # @overload lerp(x, y, z, amount) # # @param v [Vector] vector to interpolate # @param x [Numeric] x of vector to interpolate # @param y [Numeric] y of vector to interpolate # @param z [Numeric] z of vector to interpolate # @param amount [Numeric] amount to interpolate # # @return [Vector] interporated vector # def lerp(*args, amount) v = toVector__(*args) self.x = x + (v.x - x) * amount self.y = y + (v.y - y) * amount self.z = z + (v.z - z) * amount self end # Returns the interpolated vector between 2 vectors. # # @param v1 [Vector] vector to interpolate # @param v2 [Vector] vector to interpolate # @param amount [Numeric] amount to interpolate # # @return [Vector] interporated vector # def self.lerp(v1, v2, amount) v1.dup.lerp v2, amount end # Returns x, y, z as an array # # @return [Array] array of x, y, z # def array() @point.to_a 3 end # Adds a vector. # # @overload add(v) # @overload add(x, y) # @overload add(x, y, z) # # @param v [Vector] vector to add # @param x [Vector] x of vector to add # @param y [Vector] y of vector to add # @param z [Vector] z of vector to add # # @return [Vector] added vector # def add(*args) @point += toVector__(*args).getInternal__ self end # Subtracts a vector. # # @overload sub(v) # @overload sub(x, y) # @overload sub(x, y, z) # # @param v [Vector] vector to subtract # @param x [Vector] x of vector to subtract # @param y [Vector] y of vector to subtract # @param z [Vector] z of vector to subtract # # @return [Vector] subtracted vector # def sub(*args) @point -= toVector__(*args).getInternal__ self end # Multiplies a vector by scalar. # # @param num [Numeric] number to multiply the vector # # @return [Vector] multiplied vector # def mult(num) @point *= num self end # Divides a vector by scalar. # # @param num [Numeric] number to divide the vector # # @return [Vector] divided vector # def div(num) @point /= num self end # Adds a vector. # # @param v [Vector] vector to add # # @return [Vector] added vector # def +(v) dup.add v end # Subtracts a vector. # # @param v [Vector] vector to subtract # # @return [Vector] subtracted vector # def -(v) dup.sub v end # Multiplies a vector by scalar. # # @param num [Numeric] number to multiply the vector # # @return [Vector] multiplied vector # def *(num) dup.mult num end # Divides a vector by scalar. # # @param num [Numeric] number to divide the vector # # @return [Vector] divided vector # def /(num) dup.div num end # Adds 2 vectors. # # @overload add(v1, v2) # @overload add(v1, v2, target) # # @param v1 [Vector] a vector # @param v2 [Vector] another vector # @param target [Vector] vector to store added vector # # @return [Vector] added vector # def self.add(v1, v2, target = nil) v = v1 + v2 target.set v if self === target v end # Subtracts 2 vectors. # # @overload sub(v1, v2) # @overload sub(v1, v2, target) # # @param v1 [Vector] a vector # @param v2 [Vector] another vector # @param target [Vector] vector to store subtracted vector # # @return [Vector] subtracted vector # def self.sub(v1, v2, target = nil) v = v1 - v2 target.set v if self === target v end # Multiplies a vector by scalar. # # @overload mult(v, num) # @overload mult(v, num, target) # # @param v [Vector] a vector # @param num [Numeric] number to multiply the vector # @param target [Vector] vector to store multiplied vector # # @return [Vector] multiplied vector # def self.mult(v1, num, target = nil) v = v1 * num target.set v if self === target v end # Divides a vector by scalar. # # @overload div(v, num) # @overload div(v, num, target) # # @param v [Vector] a vector # @param num [Numeric] number to divide the vector # @param target [Vector] vector to store divided vector # # @return [Vector] divided vector # def self.div(v1, num, target = nil) v = v1 / num target.set v if self === target v end # Returns the length of the vector. # # @return [Numeric] length # def mag() @point.length end # Returns squared length of the vector. # # @return [Numeric] squared length # def magSq() Rays::Point::dot(@point, @point) end # Changes the length of the vector. # # @overload setMag(len) # @overload setMag(target, len) # # @param len [Numeric] length of new vector # @param target [Vector] vector to store new vector # # @return [Vector] vector with new length # def setMag(target = nil, len) (target || self).set @point.normal * len end # Changes the length of the vector to 1.0. # # @param target [Vector] vector to store the normalized vector # # @return [Vector] normalized vector # def normalize(target = nil) (target || self).set @point.normal end # Changes the length of the vector if it's length is greater than the max value. # # @param max [Numeric] max length # # @return [Vector] new vector # def limit(max) setMag max if magSq > max ** 2 self end # Returns the distance of 2 vectors. # # @param v [Vector] a vector # # @return [Numeric] the distance # def dist(v) (self - v).mag end # Returns the distance of 2 vectors. # # @param v1 [Vector] a vector # @param v2 [Vector] another vector # # @return [Numeric] the distance # def self.dist(v1, v2) v1.dist v2 end # Calculates the dot product of 2 vectors. # # @overload dot(v) # @overload dot(x, y) # @overload dot(x, y, z) # # @param v [Vector] a vector # @param x [Numeric] x of vector # @param y [Numeric] y of vector # @param z [Numeric] z of vector # # @return [Numeric] result of dot product # def dot(*args) Rays::Point::dot getInternal__, toVector__(*args).getInternal__ end # Calculates the dot product of 2 vectors. # # @param v1 [Vector] a vector # @param v2 [Vector] another vector # # @return [Numeric] result of dot product # def self.dot(v1, v2) v1.dot v2 end # Calculates the cross product of 2 vectors. # # @overload cross(v) # @overload cross(x, y) # @overload cross(x, y, z) # # @param v [Vector] a vector # @param x [Numeric] x of vector # @param y [Numeric] y of vector # @param z [Numeric] z of vector # # @return [Numeric] result of cross product # def cross(a, *rest) target = self.class === rest.last ? rest.pop : nil v = self.class.new Rays::Point::cross getInternal__, toVector__(a, *rest).getInternal__ target.set v if self.class === target v end # Calculates the cross product of 2 vectors. # # @param v1 [Vector] a vector # @param v2 [Vector] another vector # # @return [Numeric] result of cross product # def self.cross(v1, v2, target = nil) v1.cross v2, target end # Rotate the vector. # # @param angle [Numeric] the angle of rotation # # @return [Vector] rotated this object # def rotate(angle) angle = @context ? @context.toAngle__(angle) : angle * RAD2DEG__ @point.rotate! angle self end # Returns the angle of rotation for this vector. # # @return [Numeric] the angle in radians # def heading() Math.atan2 y, x end # Returns rotated new vector. # # @param angle [Numeric] the angle of rotation # @param target [Vector] vector to store new vector # # @return [Vector] rotated vector # def self.fromAngle(angle, target = nil) v = self.new(1, 0, 0).rotate(angle) target.set v if target v end # Returns angle between 2 vectors. # # @param v1 [Vector] a vector # @param v2 [Vector] another vector # # @return [Numeric] angle in radians # def self.angleBetween(v1, v2) x1, y1, z1 = v1.array x2, y2, z2 = v2.array return 0 if (x1 == 0 && y1 == 0 && z1 == 0) || (x2 == 0 && y2 == 0 && z2 == 0) x = dot(v1, v2) / (v1.mag * v2.mag) return Math::PI if x <= -1 return 0 if x >= 1 return Math.acos x end # Returns a new 2D unit vector with a random direction. # # @param target [Vector] a vector to store the new vector # # @return [Vector] a random vector # def self.random2D(target = nil) v = self.fromAngle rand 0.0...(Math::PI * 2) target.set v if target v end # Returns a new 3D unit vector with a random direction. # # @param target [Vector] a vector to store the new vector # # @return [Vector] a random vector # def self.random3D(target = nil) angle = rand 0.0...(Math::PI * 2) z = rand(-1.0..1.0) z2 = z ** 2 x = Math.sqrt(1.0 - z2) * Math.cos(angle) y = Math.sqrt(1.0 - z2) * Math.sin(angle) v = self.new x, y, z target.set v if target v end # @private def inspect() "<##{self.class.name} #{x}, #{y}, #{z}>" end # @private def <=>(o) @point <=> o.getInternal__ end # @private protected def getInternal__() @point end # @private private def toVector__(*args) self.class === args.first ? args.first : self.class.new(*args) end end# Vector # Image object. # class Image # @private def initialize(image) @image = image end # Gets width of image. # # @return [Numeric] width of image # def width() @image.width end # Gets height of image. # # @return [Numeric] height of image # def height() @image.height end # Resizes image. # # @param width [Numeric] width for resized image # @param height [Numeric] height for resized image # # @return [nil] nil # def resize(width, height) @image = Rays::Image.new(width, height).paint do |painter| painter.image @image, 0, 0, width, height end nil end # Copies image. # # @overload copy(sx, sy, sw, sh, dx, dy, dw, dh) # @overload copy(img, sx, sy, sw, sh, dx, dy, dw, dh) # # @param img [Image] image for copy source # @param sx [Numrtic] x position of source region # @param sy [Numrtic] y position of source region # @param sw [Numrtic] width of source region # @param sh [Numrtic] height of source region # @param dx [Numrtic] x position of destination region # @param dy [Numrtic] y position of destination region # @param dw [Numrtic] width of destination region # @param dh [Numrtic] height of destination region # # @return [nil] nil # def copy(img = nil, sx, sy, sw, sh, dx, dy, dw, dh) img ||= self @image.paint do |painter| painter.image img.getInternal__, sx, sy, sw, sh, dx, dy, dw, dh end end # Saves image to file. # # @param filename [String] file name to save image # def save(filename) @image.save filename end # @private def getInternal__() @image end end# Image # Font object. # class Font # @private def initialize(font) @font = font end # Returns bounding box. # # @overload textBounds(str) # @overload textBounds(str, x, y) # @overload textBounds(str, x, y, fontSize) # # @param str [String] text to calculate bounding box # @param x [Numeric] horizontal position of bounding box # @param y [Numeric] vertical position of bounding box # @param fontSize [Numeric] font size # # @return [TextBounds] bounding box for text # def textBounds(str, x = 0, y = 0, fontSize = nil) f = fontSize ? Rays::Font.new(@font.name, fontSize) : @font TextBounds.new x, y, x + f.width(str), y + f.height end end# Font # Bounding box for text. # class TextBounds # Horizontal position # attr_reader :x # Vertical position # attr_reader :y # Width of bounding box # attr_reader :w # Height of bounding box # attr_reader :h # @private def initialize(x, y, w, h) @x, @y, @w, @h = x, y, w, h end end# TextBounds # Touch object. # class Touch # Identifier of each touch # attr_reader :id # Horizontal position of touch # attr_reader :x # Vertical position of touch # attr_reader :y # @private def initialize(id, x, y) @id, @x, @y = id, x, y end end# Touch # Camera object. # class Capture # Returns a list of available camera device names # # @return [Array] device name list # def self.list() Rays::Camera.device_names end # Initialize camera object. # # @overload Capture.new() # @overload Capture.new(cameraName) # @overload Capture.new(requestWidth, requestHeight) # @overload Capture.new(requestWidth, requestHeight, cameraName) # # @param requestWidth [Integer] captured image width # @param requestHeight [Integer] captured image height # @param cameraName [String] camera device name # def initialize(*args) width, height, name = if args.empty? [-1, -1, nil] elsif args[0].kind_of?(String) [-1, -1, args[0]] elsif args[0].kind_of?(Numeric) && args[1].kind_of?(Numeric) [args[0], args[1], args[2]] else raise ArgumentError end @camera = Rays::Camera.new width, height, device_name: name end # Start capturing. # # @return [nil] nil # def start() raise "Failed to start capture" unless @camera.start nil end # Stop capturing. # # @return [nil] nil # def stop() @camera.stop nil end # Returns is the next captured image available? # # @return [Boolean] true means object has next frame # def available() @camera.active? end # Reads next frame image # def read() @camera.image end # Returns the width of captured image # # @return [Numeric] the width of captured image # def width() @camera.image&.width || 0 end # Returns the height of captured image # # @return [Numeric] the height of captured image # def height() @camera.image&.height || 0 end # @private def getInternal__() @camera.image || dummyImage__ end # @private private def dummyImage__() @dummy ||= Rays::Image.new 1, 1 end end# Capture # Drawing context # module GraphicsContext # PI # PI = Math::PI # PI / 2 # HALF_PI = PI / 2 # PI / 4 # QUARTER_PI = PI / 4 # PI * 2 # TWO_PI = PI * 2 # PI * 2 # TAU = PI * 2 # RGB mode for colorMode(). # RGB = :rgb # HSB mode for colorMode(). # HSB = :hsb # Radian mode for angleMode(). # RADIANS = :radians # Degree mode for angleMode(). # DEGREES = :degrees # Mode for rectMode(), ellipseMode() and imageMode(). # CORNER = :corner # Mode for rectMode(), ellipseMode() and imageMode(). # CORNERS = :corners # Mode for rectMode(), ellipseMode(), imageMode() and textAlign(). # CENTER = :center # Mode for rectMode() and ellipseMode(). # RADIUS = :radius # Key codes. ENTER = :enter SPACE = :space TAB = :tab DELETE = :delete BACKSPACE = :backspace ESC = :escape HOME = :home #END = :end PAGEUP = :pageup PAGEDOWN = :pagedown CLEAR = :clear SHIFT = :shift CONTROL = :control ALT = :alt WIN = :win COMMAND = :command OPTION = :option FUNCTION = :function CAPSLOCK = :capslock SECTION = :section HELP = :help F1 = :f1 F2 = :f2 F3 = :f3 F4 = :f4 F5 = :f5 F6 = :f6 F7 = :f7 F8 = :f8 F9 = :f9 F10 = :f10 F11 = :f11 F12 = :f12 F13 = :f13 F14 = :f14 F15 = :f15 F16 = :f16 F17 = :f17 F18 = :f18 F19 = :f19 F20 = :f20 F21 = :f21 F22 = :f22 F23 = :f23 F24 = :f24 UP = :up DOWN = :down # Key code or Mode for textAlign(). LEFT = :left # Key code or Mode for textAlign(). RIGHT = :right # Mode for textAlign(). TOP = :top # Mode for textAlign(). BOTTOM = :bottom # Mode for textAlign(). BASELINE = :baseline # Mode for strokeCap(). # BUTT = :butt # Mode for strokeJoin(). # MITER = :miter # Mode for strokeCap() and strokeJoin(). # ROUND = :round # Mode for strokeCap() and strokeJoin(). # SQUARE = :square def init__(image, painter) @drawing__ = false @hsbColor__ = false @colorMaxes__ = [1.0] * 4 @angleScale__ = 1.0 @rectMode__ = nil @ellipseMode__ = nil @imageMode__ = nil @textAlignH__ = nil @textAlignV__ = nil @matrixStack__ = [] @styleStack__ = [] updateCanvas__ image, painter colorMode RGB, 255 angleMode RADIANS rectMode CORNER ellipseMode CENTER imageMode CORNER textAlign LEFT fill 255 stroke 0 strokeWeight 1 end def updateCanvas__(image, painter) @image__, @painter__ = image, painter end # @private def beginDraw__() @matrixStack__.clear @styleStack__.clear @drawing__ = true end # @private def endDraw__() @drawing__ = false end def width() @image__.width end def height() @image__.height end # Sets color mode and max color values. # # @overload colorMode(mode) # @overload colorMode(mode, max) # @overload colorMode(mode, max1, max2, max3) # @overload colorMode(mode, max1, max2, max3, maxA) # # @param mode [RGB, HSB] RGB or HSB # @param max [Numeric] max values for all color values # @param max1 [Numeric] max value for red or hue # @param max2 [Numeric] max value for green or saturation # @param max3 [Numeric] max value for blue or brightness # @param maxA [Numeric] max value for alpha # # @return [nil] nil # def colorMode(mode, *maxes) mode = mode.downcase.to_sym raise ArgumentError, "invalid color mode: #{mode}" unless [RGB, HSB].include?(mode) raise ArgumentError unless [0, 1, 3, 4].include?(maxes.size) @hsbColor__ = mode == HSB case maxes.size when 1 then @colorMaxes__ = [maxes.first.to_f] * 4 when 3, 4 then @colorMaxes__[0...maxes.size] = maxes.map &:to_f end nil end # @private private def toRGBA__(*args) a, b, c, d = args return parseColor__(a, b || alphaMax__) if a.kind_of?(String) rgba = case args.size when 1, 2 then [a, a, a, b || alphaMax__] when 3, 4 then [a, b, c, d || alphaMax__] else raise ArgumentError end rgba = rgba.map.with_index {|value, i| value / @colorMaxes__[i]} color = @hsbColor__ ? Rays::Color.hsv(*rgba) : Rays::Color.new(*rgba) color.to_a end # @private private def parseColor__(str, alpha) result = str.match(/^\s*##{'([0-9a-f]{2})' * 3}\s*$/i) raise ArgumentError, "invalid color code: '#{str}'" unless result rgb = result[1..3].map.with_index {|hex, i| hex.to_i(16) / 255.0} return *rgb, (alpha / alphaMax__) end # @private private def alphaMax__() @colorMaxes__[3] end # Sets angle mode. # # @param mode [RADIANS, DEGREES] RADIANS or DEGREES # # @return [nil] nil # def angleMode(mode) @angleScale__ = case mode.downcase.to_sym when RADIANS then RAD2DEG__ when DEGREES then 1.0 else raise ArgumentError, "invalid angle mode: #{mode}" end nil end # @private def toAngle__(angle) angle * @angleScale__ end # Sets rect mode. Default is CORNER. # # CORNER -> rect(left, top, width, height) # CORNERS -> rect(left, top, right, bottom) # CENTER -> rect(center_x, center_y, width, height) # RADIUS -> rect(center_x, center_y, radius_h, radius_v) # # @param mode [CORNER, CORNERS, CENTER, RADIUS] # # @return [nil] nil # def rectMode(mode) @rectMode__ = mode end # Sets ellipse mode. Default is CENTER. # # CORNER -> ellipse(left, top, width, height) # CORNERS -> ellipse(left, top, right, bottom) # CENTER -> ellipse(center_x, center_y, width, height) # RADIUS -> ellipse(center_x, center_y, radius_h, radius_v) # # @param mode [CORNER, CORNERS, CENTER, RADIUS] # # @return [nil] nil # def ellipseMode(mode) @ellipseMode__ = mode end # Sets image mode. Default is CORNER. # # CORNER -> image(img, left, top, width, height) # CORNERS -> image(img, left, top, right, bottom) # CENTER -> image(img, center_x, center_y, width, height) # # @param mode [CORNER, CORNERS, CENTER] # # @return [nil] nil # def imageMode(mode) @imageMode__ = mode end # @private private def toXYWH__(mode, a, b, c, d) case mode when CORNER then [a, b, c, d] when CORNERS then [a, b, c - a, d - b] when CENTER then [a - c / 2.0, b - d / 2.0, c, d] when RADIUS then [a - c, b - d, c * 2, d * 2] else raise ArgumentError # ToDo: refine error message end end # Sets fill color. # # @overload fill(rgb) # @overload fill(rgb, alpha) # @overload fill(gray) # @overload fill(gray, alpha) # @overload fill(r, g, b) # @overload fill(r, g, b, alpha) # # @param rgb [String] color code like '#00AAFF' # @param gray [Integer] gray value (0..255) # @param r [Integer] red value (0..255) # @param g [Integer] green value (0..255) # @param b [Integer] blue value (0..255) # @param alpha [Integer] alpha value (0..255) # # @return [nil] nil # def fill(*args) @painter__.fill(*toRGBA__(*args)) nil end # Sets stroke color. # # @overload stroke(rgb) # @overload stroke(rgb, alpha) # @overload stroke(gray) # @overload stroke(gray, alpha) # @overload stroke(r, g, b) # @overload stroke(r, g, b, alpha) # # @param rgb [String] color code like '#00AAFF' # @param gray [Integer] gray value (0..255) # @param r [Integer] red value (0..255) # @param g [Integer] green value (0..255) # @param b [Integer] blue value (0..255) # @param alpha [Integer] alpha value (0..255) # # @return [nil] nil # def stroke(*args) @painter__.stroke(*toRGBA__(*args)) nil end # Sets stroke weight. # # @param weight [Numeric] width of stroke # # @return [nil] nil # def strokeWeight(weight) @painter__.stroke_width weight nil end # Sets stroke cap mode. # # @param cap [BUTT, ROUND, SQUARE] # # @return [nil] nil # def strokeCap(cap) @painter__.stroke_cap cap nil end # Sets stroke join mode. # # @param join [MITER, ROUND, SQUARE] # # @return [nil] nil # def strokeJoin(join) @painter__.stroke_join join nil end # Disables filling. # # @return [nil] nil # def noFill() @painter__.fill nil nil end # Disables drawing stroke. # # @return [nil] nil # def noStroke() @painter__.stroke nil nil end # Sets font. # # @param name [String] font name # @param size [Numeric] font size (max 256) # # @return [Font] current font # def textFont(name = nil, size = nil) setFont__ name, size if name || size Font.new @painter__.font end # Sets text size. # # @param size [Numeric] font size (max 256) # # @return [nil] nil # def textSize(size) setFont__ @painter__.font.name, size nil end def textWidth(str) @painter__.font.width str end def textAscent() @painter__.font.ascent end def textDescent() @painter__.font.descent end def textAlign(horizontal, vertical = BASELINE) @textAlignH__ = horizontal @textAlignV__ = vertical end # @private def setFont__(name, size) size = 256 if size && size > 256 @painter__.font name, size end # Clears screen. # # @overload background(str) # @overload background(str, alpha) # @overload background(gray) # @overload background(gray, alpha) # @overload background(r, g, b) # @overload background(r, g, b, alpha) # # @param str [String] color code like '#00AAFF' # @param gray [Integer] gray value (0..255) # @param r [Integer] red value (0..255) # @param g [Integer] green value (0..255) # @param b [Integer] blue value (0..255) # @param alpha [Integer] alpha value (0..255) # # @return [nil] nil # def background(*args) assertDrawing__ rgba = toRGBA__(*args) if rgba[3] == 1 @painter__.background(*rgba) else @painter__.push fill: rgba, stroke: nil do |_| @painter__.rect 0, 0, width, height end end nil end # Draws a point. # # @param x [Numeric] horizontal position # @param y [Numeric] vertical position # # @return [nil] nil # def point(x, y) assertDrawing__ w = @painter__.stroke_width w = 1 if w == 0 @painter__.ellipse x - (w / 2.0), y - (w / 2.0), w, w nil end # Draws a line. # # @param x1 [Numeric] horizontal position of first point # @param y1 [Numeric] vertical position of first point # @param x2 [Numeric] horizontal position of second point # @param y2 [Numeric] vertical position of second point # # @return [nil] nil # def line(x1, y1, x2, y2) assertDrawing__ @painter__.line x1, y1, x2, y2 nil end # Draws a rectangle. # # @overload rect(a, b, c, d) # @overload rect(a, b, c, d, r) # @overload rect(a, b, c, d, tl, tr, br, bl) # # @param a [Numeric] horizontal position of the shape by default # @param b [Numeric] vertical position of the shape by default # @param c [Numeric] width of the shape by default # @param d [Numeric] height of the shape by default # @param r [Numeric] radius for all corners # @param tl [Numeric] radius for top-left corner # @param tr [Numeric] radius for top-right corner # @param br [Numeric] radius for bottom-right corner # @param bl [Numeric] radius for bottom-left corner # # @return [nil] nil # def rect(a, b, c, d, *args) assertDrawing__ x, y, w, h = toXYWH__ @rectMode__, a, b, c, d case args.size when 0 then @painter__.rect x, y, w, h when 1 then @painter__.rect x, y, w, h, round: args[0] when 4 then @painter__.rect x, y, w, h, lt: args[0], rt: args[1], rb: args[2], lb: args[3] else raise ArgumentError # ToDo: refine error message end nil end # Draws an ellipse. # # @param a [Numeric] horizontal position of the shape # @param b [Numeric] vertical position of the shape # @param c [Numeric] width of the shape # @param d [Numeric] height of the shape # # @return [nil] nil # def ellipse(a, b, c, d) assertDrawing__ x, y, w, h = toXYWH__ @ellipseMode__, a, b, c, d @painter__.ellipse x, y, w, h nil end # Draws a circle. # # @param x [Numeric] horizontal position of the shape # @param y [Numeric] vertical position of the shape # @param extent [Numeric] width and height of the shape # # @return [nil] nil # def circle(x, y, extent) ellipse x, y, extent, extent end # Draws an arc. # # @param a [Numeric] horizontal position of the shape # @param b [Numeric] vertical position of the shape # @param c [Numeric] width of the shape # @param d [Numeric] height of the shape # @param start [Numeric] angle to start the arc # @param stop [Numeric] angle to stop the arc # # @return [nil] nil # def arc(a, b, c, d, start, stop) assertDrawing__ x, y, w, h = toXYWH__ @ellipseMode__, a, b, c, d start = toAngle__(-start) stop = toAngle__(-stop) @painter__.ellipse x, y, w, h, from: start, to: stop nil end # Draws a square. # # @param x [Numeric] horizontal position of the shape # @param y [Numeric] vertical position of the shape # @param extent [Numeric] width and height of the shape # # @return [nil] nil # def square(x, y, extent) rect x, y, extent, extent end # Draws a triangle. # # @param x1 [Numeric] horizontal position of first point # @param y1 [Numeric] vertical position of first point # @param x2 [Numeric] horizontal position of second point # @param y2 [Numeric] vertical position of second point # @param x3 [Numeric] horizontal position of third point # @param y3 [Numeric] vertical position of third point # # @return [nil] nil # def triangle(x1, y1, x2, y2, x3, y3) assertDrawing__ @painter__.line x1, y1, x2, y2, x3, y3, loop: true nil end # Draws a quad. # # @param x1 [Numeric] horizontal position of first point # @param y1 [Numeric] vertical position of first point # @param x2 [Numeric] horizontal position of second point # @param y2 [Numeric] vertical position of second point # @param x3 [Numeric] horizontal position of third point # @param y3 [Numeric] vertical position of third point # @param x4 [Numeric] horizontal position of fourth point # @param y4 [Numeric] vertical position of fourth point # # @return [nil] nil # def quad(x1, y1, x2, y2, x3, y3, x4, y4) assertDrawing__ @painter__.line x1, y1, x2, y2, x3, y3, x4, y4, loop: true nil end # Draws a Catmull-Rom spline curve. # # @param cx1 [Numeric] horizontal position of beginning control point # @param cy1 [Numeric] vertical position of beginning control point # @param x1 [Numeric] horizontal position of first point # @param y1 [Numeric] vertical position of first point # @param x2 [Numeric] horizontal position of second point # @param y2 [Numeric] vertical position of second point # @param cx2 [Numeric] horizontal position of ending control point # @param cy2 [Numeric] vertical position of ending control point # # @return [nil] nil # def curve(cx1, cy1, x1, y1, x2, y2, cx2, cy2) assertDrawing__ @painter__.curve cx1, cy1, x1, y1, x2, y2, cx2, cy2 nil end # Draws a Bezier spline curve. # # @param x1 [Numeric] horizontal position of first point # @param y1 [Numeric] vertical position of first point # @param cx1 [Numeric] horizontal position of first control point # @param cy1 [Numeric] vertical position of first control point # @param cx2 [Numeric] horizontal position of second control point # @param cy2 [Numeric] vertical position of second control point # @param x2 [Numeric] horizontal position of second point # @param y2 [Numeric] vertical position of second point # # @return [nil] nil # def bezier(x1, y1, cx1, cy1, cx2, cy2, x2, y2) assertDrawing__ @painter__.bezier x1, y1, cx1, cy1, cx2, cy2, x2, y2 nil end # Draws a text. # # @overload text(str) # @overload text(str, x, y) # @overload text(str, a, b, c, d) # # @param str [String] text to draw # @param x [Numeric] horizontal position of the text # @param y [Numeric] vertical position of the text # @param a [Numeric] equivalent to parameters of the rect(), see rectMode() # @param b [Numeric] equivalent to parameters of the rect(), see rectMode() # @param c [Numeric] equivalent to parameters of the rect(), see rectMode() # @param d [Numeric] equivalent to parameters of the rect(), see rectMode() # # @return [nil] nil # def text(str, x, y, x2 = nil, y2 = nil) assertDrawing__ if x2 raise ArgumentError, "missing y2 parameter" unless y2 x, y, w, h = toXYWH__ @rectMode__, x, y, x2, y2 case @textAlignH__ when RIGHT then x += w - @painter__.font.width(str) when CENTER then x += (w - @painter__.font.width(str)) / 2 end case @textAlignV__ when BOTTOM then y += h - @painter__.font.height when CENTER then y += (h - @painter__.font.height) / 2 else end else y -= @painter__.font.ascent end @painter__.text str, x, y nil end # Draws an image. # # @overload image(img, a, b) # @overload image(img, a, b, c, d) # # @param img [Image] image to draw # @param a [Numeric] horizontal position of the image # @param b [Numeric] vertical position of the image # @param c [Numeric] width of the image # @param d [Numeric] height of the image # # @return [nil] nil # def image(img, a, b, c = nil, d = nil) assertDrawing__ i = img.getInternal__ x, y, w, h = toXYWH__ @imageMode__, a, b, c || i.width, d || i.height @painter__.image i, x, y, w, h nil end # Copies image. # # @overload copy(sx, sy, sw, sh, dx, dy, dw, dh) # @overload copy(img, sx, sy, sw, sh, dx, dy, dw, dh) # # @param img [Image] image for copy source # @param sx [Numrtic] x position of source region # @param sy [Numrtic] y position of source region # @param sw [Numrtic] width of source region # @param sh [Numrtic] height of source region # @param dx [Numrtic] x position of destination region # @param dy [Numrtic] y position of destination region # @param dw [Numrtic] width of destination region # @param dh [Numrtic] height of destination region # # @return [nil] nil # def copy(img = nil, sx, sy, sw, sh, dx, dy, dw, dh) assertDrawing__ src = img&.getInternal__ || @window__.canvas_image @painter__.image src, sx, sy, sw, sh, dx, dy, dw, dh end # Applies translation matrix to current transformation matrix. # # @param x [Numeric] horizontal transformation # @param y [Numeric] vertical transformation # # @return [nil] nil # def translate(x, y) assertDrawing__ @painter__.translate x, y nil end # Applies scale matrix to current transformation matrix. # # @overload scale(s) # @overload scale(x, y) # # @param s [Numeric] horizontal and vertical scale # @param x [Numeric] horizontal scale # @param y [Numeric] vertical scale # # @return [nil] nil # def scale(x, y) assertDrawing__ @painter__.scale x, y nil end # Applies rotation matrix to current transformation matrix. # # @param angle [Numeric] angle for rotation # # @return [nil] nil # def rotate(angle) assertDrawing__ @painter__.rotate toAngle__ angle nil end # Pushes the current transformation matrix to stack. # # @return [nil] nil # def pushMatrix(&block) assertDrawing__ @matrixStack__.push @painter__.matrix if block block.call popMatrix end nil end # Pops the current transformation matrix from stack. # # @return [nil] nil # def popMatrix() assertDrawing__ raise "matrix stack underflow" if @matrixStack__.empty? @painter__.matrix = @matrixStack__.pop nil end # Reset current transformation matrix with identity matrix. # # @return [nil] nil # def resetMatrix() assertDrawing__ @painter__.matrix = 1 nil end # Save current style values to the style stack. # # @return [nil] nil # def pushStyle(&block) assertDrawing__ @styleStack__.push [ @painter__.fill, @painter__.stroke, @painter__.stroke_width, @painter__.stroke_cap, @painter__.stroke_join, @painter__.font, @hsbColor__, @colorMaxes__, @angleScale__, @rectMode__, @ellipseMode__, @imageMode__ ] if block block.call popStyle end nil end # Restore style values from the style stack. # # @return [nil] nil # def popStyle() assertDrawing__ raise "style stack underflow" if @styleStack__.empty? @painter__.fill, @painter__.stroke, @painter__.stroke_width, @painter__.stroke_cap, @painter__.stroke_join, @painter__.font, @hsbColor__, @colorMaxes__, @angleScale__, @rectMode__, @ellipseMode__, @imageMode__ = @styleStack__.pop nil end # Save current styles and transformations to stack. # # @return [nil] nil # def push(&block) pushMatrix pushStyle if block block.call pop end end # Restore styles and transformations from stack. # # @return [nil] nil # def pop() popMatrix popStyle end # @private def getInternal__() @image__ end # @private private def assertDrawing__() raise "call beginDraw() before drawing" unless @drawing__ end end# GraphicsContext # Draws graphics into an offscreen buffer # class Graphics include GraphicsContext # Initialize graphics object. # def initialize(width, height) image = Rays::Image.new width, height init__ image, image.painter end # Start drawing. # def beginDraw(&block) @painter__.__send__ :begin_paint beginDraw__ push if block block.call endDraw end end # End drawing. # def endDraw() pop endDraw__ @painter__.__send__ :end_paint end end# Graphics # Processing context # class Context include GraphicsContext Vector = Processing::Vector Capture = Processing::Capture Graphics = Processing::Graphics # @private @@context__ = nil # @private def self.context__() @@context__ end # @private def initialize(window) @@context__ = self tmpdir__.tap {|dir| FileUtils.rm_r dir.to_s if dir.directory?} @window__ = window init__( @window__.canvas_image, @window__.canvas_painter.paint {background 0.8}) @loop__ = true @redraw__ = false @frameCount__ = 0 @key__ = nil @keyCode__ = nil @keysPressed__ = Set.new @pointerPos__ = @pointerPrevPos__ = [0, 0] @pointersPressed__ = Set.new @touches__ = [] @motionGravity__ = createVector 0, 0 @window__.before_draw = proc {beginDraw__} @window__.after_draw = proc {endDraw__} drawFrame = -> { updateCanvas__ @window__.canvas_image, @window__.canvas_painter begin push @drawBlock__.call if @drawBlock__ ensure pop @frameCount__ += 1 end } @window__.draw = proc do |e| if @loop__ || @redraw__ @redraw__ = false drawFrame.call end @pointerPrevPos__ = @pointerPos__ end updateKeyStates = -> event, pressed { @key__ = event.chars @keyCode__ = event.key if pressed != nil set, key = @keysPressed__, event.key pressed ? set.add(key) : set.delete(key) end } updatePointerStates = -> event, pressed = nil { @pointerPos__ = event.pos.to_a @touches__ = event.pointers.map {|p| Touch.new(p.id, *p.pos.to_a)} if pressed != nil set, type = @pointersPressed__, event.type pressed ? set.add(type) : set.delete(type) end } @window__.key_down = proc do |e| updateKeyStates.call e, true @keyPressedBlock__&.call @keyTypedBlock__&.call if @key__ && !@key__.empty? end @window__.key_up = proc do |e| updateKeyStates.call e, false @keyReleasedBlock__&.call end @window__.pointer_down = proc do |e| updatePointerStates.call e, true (@touchStartedBlock__ || @mousePressedBlock__)&.call end @window__.pointer_up = proc do |e| updatePointerStates.call e, false (@touchEndedBlock__ || @mouseReleasedBlock__)&.call end @window__.pointer_move = proc do |e| updatePointerStates.call e (@touchMovedBlock__ || @mouseMovedBlock__)&.call end @window__.pointer_drag = proc do |e| updatePointerStates.call e (@touchMovedBlock__ || @mouseDraggedBlock__)&.call end @window__.motion = proc do |e| @motionGravity__ = createVector(*e.gravity.to_a(3)) @motionBlock__&.call end end # Defines setup block. # def setup(&block) @window__.setup = block nil end # Defines draw block. # def draw(&block) @drawBlock__ = block if block nil end # Defines keyPressed block. # # @return [Boolean] is any key pressed or not # def keyPressed(&block) @keyPressedBlock__ = block if block not @keysPressed__.empty? end # Defines keyReleased block. # def keyReleased(&block) @keyReleasedBlock__ = block if block nil end # Defines keyTyped block. # def keyTyped(&block) @keyTypedBlock__ = block if block nil end # Defines mousePressed block. # # @return [Boolean] is any mouse button pressed or not # def mousePressed(&block) @mousePressedBlock__ = block if block not @pointersPressed__.empty? end # Defines mouseReleased block. # def mouseReleased(&block) @mouseReleasedBlock__ = block if block nil end # Defines mouseMoved block. # def mouseMoved(&block) @mouseMovedBlock__ = block if block nil end # Defines mouseDragged block. # def mouseDragged(&block) @mouseDraggedBlock__ = block if block nil end # Defines touchStarted block. # def touchStarted(&block) @touchStartedBlock__ = block if block nil end # Defines touchEnded block. # def touchEnded(&block) @touchEndedBlock__ = block if block nil end # Defines touchMoved block. # def touchMoved(&block) @touchMovedBlock__ = block if block nil end # Defines motion block. # def motion(&block) @motionBlock__ = block if block nil end # Changes canvas size. # # @param width [Integer] new width # @param height [Integer] new height # @param pixelDensity [Numeric] new pixel density # # @return [nil] nil # def size(width, height, pixelDensity: self.pixelDensity) resizeCanvas__ :size, width, height, pixelDensity nil end # Changes canvas size. # # @param width [Integer] new width # @param height [Integer] new height # @param pixelDensity [Numeric] new pixel density # # @return [nil] nil # def createCanvas(width, height, pixelDensity: self.pixelDensity) resizeCanvas__ :createCanvas, width, height, pixelDensity nil end # Changes and returns canvas pixel density. # # @param density [Numeric] new pixel density # # @return [Numeric] current pixel density # def pixelDensity(density = nil) resizeCanvas__ :pixelDensity, width, height, density if density @painter__.pixel_density end # @private def resizeCanvas__(name, width, height, pixelDensity) raise '#{name}() must be called on startup or setup block' if @started__ @painter__.__send__ :end_paint @window__.__send__ :resize_canvas, width, height, pixelDensity updateCanvas__ @window__.canvas_image, @window__.canvas_painter @painter__.__send__ :begin_paint @window__.auto_resize = false end # Returns pixel density of display. # # @return [Numeric] pixel density # def displayDensity() @window__.painter.pixel_density end # Returns window width. # # @return [Numeric] window width # def windowWidth() @window__.width end # Returns window height. # # @return [Numeric] window height # def windowHeight() @window__.height end # Returns number of frames since program started. # # @return [Integer] total number of frames # def frameCount() @frameCount__ end # Returns number of frames per second. # # @return [Float] frames per second # def frameRate() @window__.event.fps end # Returns the last key that was pressed or released. # # @return [String] last key # def key() @key__ end # Returns the last key code that was pressed or released. # # @return [Symbol] last key code # def keyCode() @keyCode__ end # Returns mouse x position # # @return [Numeric] horizontal position of mouse # def mouseX() @pointerPos__[0] end # Returns mouse y position # # @return [Numeric] vertical position of mouse # def mouseY() @pointerPos__[1] end # Returns mouse x position in previous frame # # @return [Numeric] horizontal position of mouse # def pmouseX() @pointerPrevPos__[0] end # Returns mouse y position in previous frame # # @return [Numeric] vertical position of mouse # def pmouseY() @pointerPrevPos__[1] end # Returns array of touches # # @return [Array] Touch objects # def touches() @touches__ end # Returns vector for real world gravity # # @return [Vector] gravity vector # def motionGravity() @motionGravity__ end # Enables calling draw block on every frame. # # @return [nil] nil # def loop() @loop__ = true end # Disables calling draw block on every frame. # # @return [nil] nil # def noLoop() @loop__ = false end # Calls draw block to redraw frame. # # @return [nil] nil # def redraw() @redraw__ = true end # # Utilities # # Returns the absolute number of the value. # # @param value [Numeric] number # # @return [Numeric] absolute number # def abs(value) value.abs end # Returns the closest integer number greater than or equal to the value. # # @param value [Numeric] number # # @return [Numeric] rounded up number # def ceil(value) value.ceil end # Returns the closest integer number less than or equal to the value. # # @param value [Numeric] number # # @return [Numeric] rounded down number # def floor(value) value.floor end # Returns the closest integer number. # # @param value [Numeric] number # # @return [Numeric] rounded number # def round(value) value.round end # Returns the natural logarithm (the base-e logarithm) of a number. # # @param value [Numeric] number (> 0.0) # # @return [Numeric] result number # def log(n) Math.log n end # Returns Euler's number e raised to the power of value. # # @param value [Numeric] number # # @return [Numeric] result number # def exp(n) Math.exp n end # Returns value raised to the power of exponent. # # @param value [Numeric] base number # @param exponent [Numeric] exponent number # # @return [Numeric] value ** exponent # def pow(value, exponent) value ** exponent end # Returns squared value. # # @param value [Numeric] number # # @return [Numeric] squared value # def sq(value) value * value end # Returns squared value. # # @param value [Numeric] number # # @return [Numeric] squared value # def sqrt(value) Math.sqrt value end # Returns the magnitude (or length) of a vector. # # @overload mag(x, y) # @overload mag(x, y, z) # # @param x [Numeric] x of point # @param y [Numeric] y of point # @param z [Numeric] z of point # # @return [Numeric] magnitude # def mag(*args) x, y, z = *args case args.size when 2 then Math.sqrt x * x + y * y when 3 then Math.sqrt x * x + y * y + z * z else raise ArgumentError end end # Returns distance between 2 points. # # @overload dist(x1, y1, x2, y2) # @overload dist(x1, y1, z1, x2, y2, z2) # # @param x1 [Numeric] x of first point # @param y1 [Numeric] y of first point # @param z1 [Numeric] z of first point # @param x2 [Numeric] x of second point # @param y2 [Numeric] y of second point # @param z2 [Numeric] z of second point # # @return [Numeric] distance between 2 points # def dist(*args) case args.size when 4 x1, y1, x2, y2 = *args xx, yy = x2 - x1, y2 - y1 Math.sqrt xx * xx + yy * yy when 3 x1, y1, z1, x2, y2, z2 = *args xx, yy, zz = x2 - x1, y2 - y1, z2 - z1 Math.sqrt xx * xx + yy * yy + zz * zz else raise ArgumentError end end # Normalize the value from range start..stop into 0..1. # # @param value [Numeric] number to be normalized # @param start [Numeric] lower bound of the range # @param stop [Numeric] upper bound of the range # # @return [Numeric] normalized value between 0..1 # def norm(value, start, stop) (value.to_f - start.to_f) / (stop.to_f - start.to_f) end # Returns the interpolated number between range start..stop. # # @param start [Numeric] lower bound of the range # @param stop [Numeric] upper bound of the range # @param amount [Numeric] amount to interpolate # # @return [Numeric] interporated number # def lerp(start, stop, amount) start + (stop - start) * amount end # Maps a number from range start1..stop1 to range start2..stop2. # # @param value [Numeric] number to be mapped # @param start1 [Numeric] lower bound of the range1 # @param stop1 [Numeric] upper bound of the range1 # @param start2 [Numeric] lower bound of the range2 # @param stop2 [Numeric] upper bound of the range2 # # @return [Numeric] mapped number # def map(value, start1, stop1, start2, stop2) lerp start2, stop2, norm(value, start1, stop1) end # Returns minimum value. # # @overload min(a, b) # @overload min(a, b, c) # @overload min(array) # # @param a [Numeric] value to compare # @param b [Numeric] value to compare # @param c [Numeric] value to compare # @param array [Numeric] values to compare # # @return [Numeric] minimum value # def min(*args) args.flatten.min end # Returns maximum value. # # @overload max(a, b) # @overload max(a, b, c) # @overload max(array) # # @param a [Numeric] value to compare # @param b [Numeric] value to compare # @param c [Numeric] value to compare # @param array [Numeric] values to compare # # @return [Numeric] maximum value # def max(*args) args.flatten.max end # Constrains the number between min..max. # # @param value [Numeric] number to be constrained # @param min [Numeric] lower bound of the range # @param max [Numeric] upper bound of the range # # @return [Numeric] constrained number # def constrain(value, min, max) value < min ? min : (value > max ? max : value) end # Converts degree to radian. # # @param degree [Numeric] degree to convert # # @return [Numeric] radian # def radians(degree) degree * DEG2RAD__ end # Converts radian to degree. # # @param radian [Numeric] radian to convert # # @return [Numeric] degree # def degrees(radian) radian * RAD2DEG__ end # Returns the sine of an angle. # # @param angle [Numeric] angle in radians # # @return [Numeric] the sine # def sin(angle) Math.sin angle end # Returns the cosine of an angle. # # @param angle [Numeric] angle in radians # # @return [Numeric] the cosine # def cos(angle) Math.cos angle end # Returns the ratio of the sine and cosine of an angle. # # @param angle [Numeric] angle in radians # # @return [Numeric] the tangent # def tan(angle) Math.tan angle end # Returns the inverse of sin(). # # @param value [Numeric] value for calculation # # @return [Numeric] the arc sine # def asin(value) Math.asin value end # Returns the inverse of cos(). # # @param value [Numeric] value for calculation # # @return [Numeric] the arc cosine # def acos(value) Math.acos value end # Returns the inverse of tan(). # # @param value [Numeric] value for valculation # # @return [Numeric] the arc tangent # def atan(value) Math.atan value end # Returns the angle from a specified point. # # @param y [Numeric] y of the point # @param x [Numeric] x of the point # # @return [Numeric] the angle in radians # def atan2(y, x) Math.atan2 y, x end # Returns the perlin noise value. # # @overload noise(x) # @overload noise(x, y) # @overload noise(x, y, z) # # @param x [Numeric] horizontal point in noise space # @param y [Numeric] vertical point in noise space # @param z [Numeric] depth point in noise space # # @return [Numeric] noise value (0.0..1.0) # def noise(x, y = 0, z = 0) Rays.perlin(x, y, z) / 2.0 + 0.5 end # Returns a random number in range low...high # # @overload random() # @overload random(high) # @overload random(low, high) # @overload random(choices) # # @param low [Numeric] lower limit # @param high [Numeric] upper limit # @param choices [Array] array to choose from # # @return [Float] random number # def random(*args) return args.first.sample if args.first.kind_of? Array high, low = args.reverse rand (low || 0).to_f...(high || 1).to_f end # Creates a new vector. # # @overload createVector() # @overload createVector(x, y) # @overload createVector(x, y, z) # # @param x [Numeric] x of new vector # @param y [Numeric] y of new vector # @param z [Numeric] z of new vector # # @return [Vector] new vector # def createVector(*args) Vector.new(*args, context: self) end # Creates a camera object as a video input device. # # @return [Capture] camera object # def createCapture(*args) Capture.new(*args) end # Creates a new off-screen graphics context object. # # @param width [Numeric] width of graphics image # @param height [Numeric] height of graphics image # # @return [Graphics] graphics object # def createGraphics(width, height) Graphics.new width, height end # Loads image. # # @param filename [String] file name to load image # @param extension [String] type of image to load (ex. 'png') # # @return [Image] loaded image object # def loadImage(filename, extension = nil) filename = getImage__ filename, extension if filename =~ %r|^https?://| Image.new Rays::Image.load filename end # @private private def getImage__(uri, ext) ext ||= File.extname uri raise "unsupported image type -- #{ext}" unless ext =~ /^\.?(png)$/i tmpdir = tmpdir__ path = tmpdir + Digest::SHA1.hexdigest(uri) path = path.sub_ext ext unless path.file? URI.open uri do |input| input.set_encoding nil# disable default_internal tmpdir.mkdir unless tmpdir.directory? path.open('w') do |output| output.set_encoding Encoding::ASCII_8BIT while buf = input.read(2 ** 16) output.write buf end end end end path.to_s end # @private private def tmpdir__() Pathname(Dir.tmpdir) + Digest::SHA1.hexdigest(self.class.name) end end# Context end# Processing end# RubySketch