Module: RubySketch::Processing::GraphicsContext

Included in:
Context, Graphics
Defined in:
lib/rubysketch/processing.rb

Overview

Drawing context

Constant Summary collapse

Vector = 
Processing::Vector
PI =

PI

Math::PI
HALF_PI =

PI / 2

PI / 2
QUARTER_PI =

PI / 4

PI / 4
TWO_PI =

PI * 2

PI * 2
TAU =

PI * 2

PI * 2
RGB =

RGB mode for colorMode().

:RGB
HSB =

HSB mode for colorMode().

:HSB
RADIANS =

Radian mode for angleMode().

:RADIANS
DEGREES =

Degree mode for angleMode().

:DEGREES
CORNER =

Mode for rectMode(), ellipseMode() and imageMode().

:CORNER
CORNERS =

Mode for rectMode(), ellipseMode() and imageMode().

:CORNERS
CENTER =

Mode for rectMode(), ellipseMode(), imageMode() and textAlign().

:CENTER
RADIUS =

Mode for rectMode() and ellipseMode().

:RADIUS
LEFT =

Mode for textAlign().

:LEFT
RIGHT =

Mode for textAlign().

:RIGHT
TOP =

Mode for textAlign().

:TOP
BOTTOM =

Mode for textAlign().

:BOTTOM
BASELINE =

Mode for textAlign().

:BASELINE
BUTT =

Mode for strokeCap().

:butt
MITER =

Mode for strokeJoin().

:miter
ROUND =

Mode for strokeCap() and strokeJoin().

:round
SQUARE =

Mode for strokeCap() and strokeJoin().

:square

Instance Method Summary collapse

Instance Method Details

#angleMode(mode) ⇒ nil

Sets angle mode.

Parameters:

Returns:

  • (nil) —

    nil



929
930
931
932
933
934
935
936
 
# File 'lib/rubysketch/processing.rb', line 929

def angleMode (mode)
  @angleScale__ = case mode.upcase.to_sym
    when RADIANS then RAD2DEG__
    when DEGREES then 1.0
    else raise ArgumentError, "invalid angle mode: #{mode}"
    end
  nil
end

#arc(a, b, c, d, start, stop) ⇒ nil

Draws an arc.

Parameters:

  • a (Numeric) —

    horizontal position of the shape

  • b (Numeric) —

    vertical position of the shape

  • c (Numeric) —

    width of the shape

  • d (Numeric) —

    height of the shape

  • start (Numeric) —

    angle to start the arc

  • stop (Numeric) —

    angle to stop the arc

Returns:

  • (nil) —

    nil



1271
1272
1273
1274
1275
1276
1277
1278
 
# File 'lib/rubysketch/processing.rb', line 1271

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

#background(str) ⇒ nil #background(str, alpha) ⇒ nil #background(gray) ⇒ nil #background(gray, alpha) ⇒ nil #background(r, g, b) ⇒ nil #background(r, g, b, alpha) ⇒ nil

Clears screen.

Parameters:

  • str (String) —

    color code like '#00AAFF'

  • gray (Integer) —

    gray value (0..255)

  • r (Integer) —

    red value (0..255)

  • g (Integer) —

    green value (0..255)

  • b (Integer) —

    blue value (0..255)

  • alpha (Integer) —

    alpha value (0..255)

Returns:

  • (nil) —

    nil



1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
 
# File 'lib/rubysketch/processing.rb', line 1159

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

#beginDraw ⇒ Object 



847
848
849
850
851
 
# File 'lib/rubysketch/processing.rb', line 847

def beginDraw ()
  @matrixStack__.clear
  @styleStack__.clear
  @drawing__ = true
end

#bezier(x1, y1, cx1, cy1, cx2, cy2, x2, y2) ⇒ nil

Draws a Bezier spline curve.

Parameters:

  • x1 (Numeric) —

    horizontal position of first point

  • y1 (Numeric) —

    vertical position of first point

  • cx1 (Numeric) —

    horizontal position of first control point

  • cy1 (Numeric) —

    vertical position of first control point

  • cx2 (Numeric) —

    horizontal position of second control point

  • cy2 (Numeric) —

    vertical position of second control point

  • x2 (Numeric) —

    horizontal position of second point

  • y2 (Numeric) —

    vertical position of second point

Returns:

  • (nil) —

    nil



1360
1361
1362
1363
1364
 
# File 'lib/rubysketch/processing.rb', line 1360

def bezier (x1, y1, cx1, cy1, cx2, cy2, x2, y2)
  assertDrawing__
  @painter__.bezier x1, y1, cx1, cy1, cx2, cy2, x2, y2
  nil
end

#circle(x, y, extent) ⇒ nil

Draws a circle.

Parameters:

  • x (Numeric) —

    horizontal position of the shape

  • y (Numeric) —

    vertical position of the shape

  • extent (Numeric) —

    width and height of the shape

Returns:

  • (nil) —

    nil



1256
1257
1258
 
# File 'lib/rubysketch/processing.rb', line 1256

def circle (x, y, extent)
  ellipse x, y, extent, extent
end

#colorMode(mode) ⇒ nil #colorMode(mode, max) ⇒ nil #colorMode(mode, max1, max2, max3) ⇒ nil #colorMode(mode, max1, max2, max3, maxA) ⇒ nil

Sets color mode and max color values.

Parameters:

  • mode (RGB, HSB) —

    RGB or HSB

  • max (Numeric) —

    max values for all color values

  • max1 (Numeric) —

    max value for red or hue

  • max2 (Numeric) —

    max value for green or saturation

  • max3 (Numeric) —

    max value for blue or brightness

  • maxA (Numeric) —

    max value for alpha

Returns:

  • (nil) —

    nil

Raises:

  • (ArgumentError) 


881
882
883
884
885
886
887
888
889
890
891
892
 
# File 'lib/rubysketch/processing.rb', line 881

def colorMode (mode, *maxes)
  mode = mode.upcase.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

#copy(sx, sy, sw, sh, dx, dy, dw, dh) ⇒ nil #copy(img, sx, sy, sw, sh, dx, dy, dw, dh) ⇒ nil

Copies image.

Parameters:

  • img (Image) (defaults to: nil) —

    image for copy source

  • sx (Numrtic) —

    x position of source region

  • sy (Numrtic) —

    y position of source region

  • sw (Numrtic) —

    width of source region

  • sh (Numrtic) —

    height of source region

  • dx (Numrtic) —

    x position of destination region

  • dy (Numrtic) —

    y position of destination region

  • dw (Numrtic) —

    width of destination region

  • dh (Numrtic) —

    height of destination region

Returns:

  • (nil) —

    nil



1440
1441
1442
1443
1444
 
# File 'lib/rubysketch/processing.rb', line 1440

def copy (img = nil, sx, sy, sw, sh, dx, dy, dw, dh)
  assertDrawing__
  src = img&.getInternal__ || @window__.canvas
  @painter__.image src, sx, sy, sw, sh, dx, dy, dw, dh
end

#curve(cx1, cy1, x1, y1, x2, y2, cx2, cy2) ⇒ nil

Draws a Catmull-Rom spline curve.

Parameters:

  • cx1 (Numeric) —

    horizontal position of beginning control point

  • cy1 (Numeric) —

    vertical position of beginning control point

  • x1 (Numeric) —

    horizontal position of first point

  • y1 (Numeric) —

    vertical position of first point

  • x2 (Numeric) —

    horizontal position of second point

  • y2 (Numeric) —

    vertical position of second point

  • cx2 (Numeric) —

    horizontal position of ending control point

  • cy2 (Numeric) —

    vertical position of ending control point

Returns:

  • (nil) —

    nil



1341
1342
1343
1344
1345
 
# File 'lib/rubysketch/processing.rb', line 1341

def curve (cx1, cy1, x1, y1, x2, y2, cx2, cy2)
  assertDrawing__
  @painter__.curve cx1, cy1, x1, y1, x2, y2, cx2, cy2
  nil
end

#ellipse(a, b, c, d) ⇒ nil

Draws an ellipse.

Parameters:

  • a (Numeric) —

    horizontal position of the shape

  • b (Numeric) —

    vertical position of the shape

  • c (Numeric) —

    width of the shape

  • d (Numeric) —

    height of the shape

Returns:

  • (nil) —

    nil



1241
1242
1243
1244
1245
1246
 
# File 'lib/rubysketch/processing.rb', line 1241

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

#ellipseMode(mode) ⇒ nil

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)

Parameters:

Returns:

  • (nil) —

    nil



969
970
971
 
# File 'lib/rubysketch/processing.rb', line 969

def ellipseMode (mode)
  @ellipseMode__ = mode
end

#endDraw ⇒ Object 



853
854
855
 
# File 'lib/rubysketch/processing.rb', line 853

def endDraw ()
  @drawing__ = false
end

#fill(rgb) ⇒ nil #fill(rgb, alpha) ⇒ nil #fill(gray) ⇒ nil #fill(gray, alpha) ⇒ nil #fill(r, g, b) ⇒ nil #fill(r, g, b, alpha) ⇒ nil

Sets fill color.

Parameters:

  • rgb (String) —

    color code like '#00AAFF'

  • gray (Integer) —

    gray value (0..255)

  • r (Integer) —

    red value (0..255)

  • g (Integer) —

    green value (0..255)

  • b (Integer) —

    blue value (0..255)

  • alpha (Integer) —

    alpha value (0..255)

Returns:

  • (nil) —

    nil



1016
1017
1018
1019
 
# File 'lib/rubysketch/processing.rb', line 1016

def fill (*args)
  @painter__.fill(*toRGBA__(*args))
  nil
end

#height ⇒ Object 



861
862
863
 
# File 'lib/rubysketch/processing.rb', line 861

def height ()
  @image__.height
end

#image(img, a, b) ⇒ nil #image(img, a, b, c, d) ⇒ nil

Draws an image.

Parameters:

  • img (Image) —

    image to draw

  • a (Numeric) —

    horizontal position of the image

  • b (Numeric) —

    vertical position of the image

  • c (Numeric) (defaults to: nil) —

    width of the image

  • d (Numeric) (defaults to: nil) —

    height of the image

Returns:

  • (nil) —

    nil



1416
1417
1418
1419
1420
1421
 
# File 'lib/rubysketch/processing.rb', line 1416

def image (img, a, b, c = nil, d = nil)
  assertDrawing__
  x, y, w, h = toXYWH__ @imageMode__, a, b, c || img.width, d || img.height
  @painter__.image img.getInternal__, x, y, w, h
  nil
end

#imageMode(mode) ⇒ nil

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)

Parameters:

Returns:

  • (nil) —

    nil



983
984
985
 
# File 'lib/rubysketch/processing.rb', line 983

def imageMode (mode)
  @imageMode__ = mode
end

#line(x1, y1, x2, y2) ⇒ nil

Draws a line.

Parameters:

  • x1 (Numeric) —

    horizontal position of first point

  • y1 (Numeric) —

    vertical position of first point

  • x2 (Numeric) —

    horizontal position of second point

  • y2 (Numeric) —

    vertical position of second point

Returns:

  • (nil) —

    nil



1196
1197
1198
1199
1200
 
# File 'lib/rubysketch/processing.rb', line 1196

def line (x1, y1, x2, y2)
  assertDrawing__
  @painter__.line x1, y1, x2, y2
  nil
end

#noFill ⇒ nil

Disables filling.

Returns:

  • (nil) —

    nil



1081
1082
1083
1084
 
# File 'lib/rubysketch/processing.rb', line 1081

def noFill ()
  @painter__.fill nil
  nil
end

#noStroke ⇒ nil

Disables drawing stroke.

Returns:

  • (nil) —

    nil



1090
1091
1092
1093
 
# File 'lib/rubysketch/processing.rb', line 1090

def noStroke ()
  @painter__.stroke nil
  nil
end

#point(x, y) ⇒ nil

Draws a point.

Parameters:

  • x (Numeric) —

    horizontal position

  • y (Numeric) —

    vertical position

Returns:

  • (nil) —

    nil



1179
1180
1181
1182
1183
1184
1185
 
# File 'lib/rubysketch/processing.rb', line 1179

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

#pop ⇒ nil

Restore styles and transformations from stack.

Returns:

  • (nil) —

    nil



1589
1590
1591
1592
 
# File 'lib/rubysketch/processing.rb', line 1589

def pop ()
  popMatrix
  popStyle
end

#popMatrix ⇒ nil

Pops the current transformation matrix from stack.

Returns:

  • (nil) —

    nil



1506
1507
1508
1509
1510
1511
 
# File 'lib/rubysketch/processing.rb', line 1506

def popMatrix ()
  assertDrawing__
  raise "matrix stack underflow" if @matrixStack__.empty?
  @painter__.matrix = @matrixStack__.pop
  nil
end

#popStyle ⇒ nil

Restore style values from the style stack.

Returns:

  • (nil) —

    nil



1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
 
# File 'lib/rubysketch/processing.rb', line 1554

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

#push(&block) ⇒ nil

Save current styles and transformations to stack.

Returns:

  • (nil) —

    nil



1576
1577
1578
1579
1580
1581
1582
1583
 
# File 'lib/rubysketch/processing.rb', line 1576

def push (&block)
  pushMatrix
  pushStyle
  if block
    block.call
    pop
  end
end

#pushMatrix(&block) ⇒ nil

Pushes the current transformation matrix to stack.

Returns:

  • (nil) —

    nil



1492
1493
1494
1495
1496
1497
1498
1499
1500
 
# File 'lib/rubysketch/processing.rb', line 1492

def pushMatrix (&block)
  assertDrawing__
  @matrixStack__.push @painter__.matrix
  if block
    block.call
    popMatrix
  end
  nil
end

#pushStyle(&block) ⇒ nil

Save current style values to the style stack.

Returns:

  • (nil) —

    nil



1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
 
# File 'lib/rubysketch/processing.rb', line 1527

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

#quad(x1, y1, x2, y2, x3, y3, x4, y4) ⇒ nil

Draws a quad.

Parameters:

  • x1 (Numeric) —

    horizontal position of first point

  • y1 (Numeric) —

    vertical position of first point

  • x2 (Numeric) —

    horizontal position of second point

  • y2 (Numeric) —

    vertical position of second point

  • x3 (Numeric) —

    horizontal position of third point

  • y3 (Numeric) —

    vertical position of third point

  • x4 (Numeric) —

    horizontal position of fourth point

  • y4 (Numeric) —

    vertical position of fourth point

Returns:

  • (nil) —

    nil



1322
1323
1324
1325
1326
 
# File 'lib/rubysketch/processing.rb', line 1322

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

#rect(a, b, c, d) ⇒ nil #rect(a, b, c, d, r) ⇒ nil #rect(a, b, c, d, tl, tr, br, bl) ⇒ nil

Draws a rectangle.

Parameters:

  • a (Numeric) —

    horizontal position of the shape by default

  • b (Numeric) —

    vertical position of the shape by default

  • c (Numeric) —

    width of the shape by default

  • d (Numeric) —

    height of the shape by default

  • r (Numeric) —

    radius for all corners

  • tl (Numeric) —

    radius for top-left corner

  • tr (Numeric) —

    radius for top-right corner

  • br (Numeric) —

    radius for bottom-right corner

  • bl (Numeric) —

    radius for bottom-left corner

Returns:

  • (nil) —

    nil



1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
 
# File 'lib/rubysketch/processing.rb', line 1220

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

#rectMode(mode) ⇒ nil

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)

Parameters:

Returns:

  • (nil) —

    nil



954
955
956
 
# File 'lib/rubysketch/processing.rb', line 954

def rectMode (mode)
  @rectMode__ = mode
end

#resetMatrix ⇒ nil

Reset current transformation matrix with identity matrix.

Returns:

  • (nil) —

    nil



1517
1518
1519
1520
1521
 
# File 'lib/rubysketch/processing.rb', line 1517

def resetMatrix ()
  assertDrawing__
  @painter__.matrix = 1
  nil
end

#rotate(angle) ⇒ nil

Applies rotation matrix to current transformation matrix.

Parameters:

  • angle (Numeric) —

    angle for rotation

Returns:

  • (nil) —

    nil



1482
1483
1484
1485
1486
 
# File 'lib/rubysketch/processing.rb', line 1482

def rotate (angle)
  assertDrawing__
  @painter__.rotate toAngle__ angle
  nil
end

#scale(s) ⇒ nil #scale(x, y) ⇒ nil

Applies scale matrix to current transformation matrix.

Parameters:

  • s (Numeric) —

    horizontal and vertical scale

  • x (Numeric) —

    horizontal scale

  • y (Numeric) —

    vertical scale

Returns:

  • (nil) —

    nil



1470
1471
1472
1473
1474
 
# File 'lib/rubysketch/processing.rb', line 1470

def scale (x, y)
  assertDrawing__
  @painter__.scale x, y
  nil
end

#setup__(painter) ⇒ Object 



820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
 
# File 'lib/rubysketch/processing.rb', line 820

def setup__ (painter)
  @painter__             = painter
  @painter__.miter_limit = 10

  @drawing__     = false
  @hsbColor__    = false
  @colorMaxes__  = [1.0] * 4
  @angleScale__  = 1.0
  @rectMode__    = nil
  @ellipseMode__ = nil
  @imageMode__   = nil
  @textAlignH__  = nil
  @textAlignV__  = nil
  @matrixStack__ = []
  @styleStack__  = []

  colorMode   RGB, 255
  angleMode   RADIANS
  rectMode    CORNER
  ellipseMode CENTER
  imageMode   CORNER
  textAlign   LEFT

  fill 255
  stroke 0
end

#square(x, y, extent) ⇒ nil

Draws a square.

Parameters:

  • x (Numeric) —

    horizontal position of the shape

  • y (Numeric) —

    vertical position of the shape

  • extent (Numeric) —

    width and height of the shape

Returns:

  • (nil) —

    nil



1288
1289
1290
 
# File 'lib/rubysketch/processing.rb', line 1288

def square (x, y, extent)
  rect x, y, extent, extent
end

#stroke(rgb) ⇒ nil #stroke(rgb, alpha) ⇒ nil #stroke(gray) ⇒ nil #stroke(gray, alpha) ⇒ nil #stroke(r, g, b) ⇒ nil #stroke(r, g, b, alpha) ⇒ nil

Sets stroke color.

Parameters:

  • rgb (String) —

    color code like '#00AAFF'

  • gray (Integer) —

    gray value (0..255)

  • r (Integer) —

    red value (0..255)

  • g (Integer) —

    green value (0..255)

  • b (Integer) —

    blue value (0..255)

  • alpha (Integer) —

    alpha value (0..255)

Returns:

  • (nil) —

    nil



1039
1040
1041
1042
 
# File 'lib/rubysketch/processing.rb', line 1039

def stroke (*args)
  @painter__.stroke(*toRGBA__(*args))
  nil
end

#strokeCap(cap) ⇒ nil

Sets stroke cap mode.

Parameters:

Returns:

  • (nil) —

    nil



1061
1062
1063
1064
 
# File 'lib/rubysketch/processing.rb', line 1061

def strokeCap (cap)
  @painter__.stroke_cap cap
  nil
end

#strokeJoin(join) ⇒ nil

Sets stroke join mode.

Parameters:

Returns:

  • (nil) —

    nil



1072
1073
1074
1075
 
# File 'lib/rubysketch/processing.rb', line 1072

def strokeJoin (join)
  @painter__.stroke_join join
  nil
end

#strokeWeight(weight) ⇒ nil

Sets stroke weight.

Parameters:

  • weight (Numeric) —

    width of stroke

Returns:

  • (nil) —

    nil



1050
1051
1052
1053
 
# File 'lib/rubysketch/processing.rb', line 1050

def strokeWeight (weight)
  @painter__.stroke_width weight
  nil
end

#text(str) ⇒ nil #text(str, x, y) ⇒ nil #text(str, a, b, c, d) ⇒ nil

Draws a text.

Parameters:

  • str (String) —

    text to draw

  • x (Numeric) —

    horizontal position of the text

  • y (Numeric) —

    vertical position of the text

  • a (Numeric) —

    equivalent to parameters of the rect(), see rectMode()

  • b (Numeric) —

    equivalent to parameters of the rect(), see rectMode()

  • c (Numeric) —

    equivalent to parameters of the rect(), see rectMode()

  • d (Numeric) —

    equivalent to parameters of the rect(), see rectMode()

Returns:

  • (nil) —

    nil



1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
 
# File 'lib/rubysketch/processing.rb', line 1382

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

#textAlign(horizontal, vertical = BASELINE) ⇒ Object 



1130
1131
1132
1133
 
# File 'lib/rubysketch/processing.rb', line 1130

def textAlign (horizontal, vertical = BASELINE)
  @textAlignH__ = horizontal
  @textAlignV__ = vertical
end

#textAscent ⇒ Object 



1122
1123
1124
 
# File 'lib/rubysketch/processing.rb', line 1122

def textAscent ()
  @painter__.font.ascent
end

#textDescent ⇒ Object 



1126
1127
1128
 
# File 'lib/rubysketch/processing.rb', line 1126

def textDescent ()
  @painter__.font.descent
end

#textFont(name = nil, size = nil) ⇒ Font

Sets font.

Parameters:

  • name (String) (defaults to: nil) —

    font name

  • size (Numeric) (defaults to: nil) —

    font size (max 256)

Returns:

  • (Font) —

    current font



1102
1103
1104
1105
 
# File 'lib/rubysketch/processing.rb', line 1102

def textFont (name = nil, size = nil)
  setFont__ name, size if name || size
  Font.new @painter__.font
end

#textSize(size) ⇒ nil

Sets text size.

Parameters:

  • size (Numeric) —

    font size (max 256)

Returns:

  • (nil) —

    nil



1113
1114
1115
1116
 
# File 'lib/rubysketch/processing.rb', line 1113

def textSize (size)
  setFont__ @painter__.font.name, size
  nil
end

#textWidth(str) ⇒ Object 



1118
1119
1120
 
# File 'lib/rubysketch/processing.rb', line 1118

def textWidth (str)
  @painter__.font.width str
end

#translate(x, y) ⇒ nil

Applies translation matrix to current transformation matrix.

Parameters:

  • x (Numeric) —

    horizontal transformation

  • y (Numeric) —

    vertical transformation

Returns:

  • (nil) —

    nil



1453
1454
1455
1456
1457
 
# File 'lib/rubysketch/processing.rb', line 1453

def translate (x, y)
  assertDrawing__
  @painter__.translate x, y
  nil
end

#triangle(x1, y1, x2, y2, x3, y3) ⇒ nil

Draws a triangle.

Parameters:

  • x1 (Numeric) —

    horizontal position of first point

  • y1 (Numeric) —

    vertical position of first point

  • x2 (Numeric) —

    horizontal position of second point

  • y2 (Numeric) —

    vertical position of second point

  • x3 (Numeric) —

    horizontal position of third point

  • y3 (Numeric) —

    vertical position of third point

Returns:

  • (nil) —

    nil



1303
1304
1305
1306
1307
 
# File 'lib/rubysketch/processing.rb', line 1303

def triangle (x1, y1, x2, y2, x3, y3)
  assertDrawing__
  @painter__.line x1, y1, x2, y2, x3, y3, loop: true
  nil
end

#width ⇒ Object 



857
858
859
 
# File 'lib/rubysketch/processing.rb', line 857

def width ()
  @image__.width
end