def test_copy_log(): p1 = Pen() p1.fill_mode() p1.move_to((0, 0)) p1.turn_to(0) p1.line_forward(5) p2 = p1.copy(paper=True) p2.line_forward(5) assert_equal( p1.log(), [ 'fill_mode()', 'move_to((0, 0))', 'turn_to(0)', 'line_forward(5)', ] ) assert_path_data( p1, 0, 'M0,0 L5,0' ) assert_equal( p2.log(), [ 'fill_mode()', 'move_to((0, 0))', 'turn_to(0)', 'line_forward(5)', 'line_forward(5)', ] ) assert_path_data( p2, 0, 'M0,0 L5,0 L10,0' )
def test_paper_merge(): # Merge two drawings together. paper = Paper() p = Pen() p.fill_mode() p.turn_to(0) p.arc_left(180, 5) p.paper.center_on_x(0) paper.merge(p.paper) p = Pen() p.fill_mode() p.turn_to(180) p.arc_left(180, 5) p.paper.center_on_x(0) paper.merge(p.paper) assert_path_data( paper, 1, [ 'M-2.5,0.0 A 5.0,5.0 0 0 0 -2.5,-10.0', 'M2.5,0.0 A 5.0,5.0 0 0 0 2.5,10.0', ] )
def test_fuse_with_joint(): p = Pen() p.stroke_mode(2.0) p.move_to((0, 0)) p.turn_to(180) p.line_forward(5) p.turn_left(90) p.line_forward(5) p.break_stroke() p.move_to((0, 0)) p.turn_to(0) p.line_forward(5) assert_path_data( p, 0, [ 'M0,1 L0,-1 L-6,-1 L-6,5 L-4,5 L-4,1 L0,1 z', 'M0,-1 L0,1 L5,1 L5,-1 L0,-1 z', ] ) p.paper.join_paths() p.paper.fuse_paths() assert_path_data( p, 0, 'M-6,5 L-4,5 L-4,1 L5,1 L5,-1 L-6,-1 L-6,5 z' )
def draw_character(self, mode, **kwargs): side_ending = self.side_ending_class( self, self.side_flipped, ) paper = Paper() pen = Pen() pen.set_mode(mode) pen.move_to((0, TOP - mode.width / 2)) pen.turn_to(0) pen.line_forward(2.0) pen.last_segment().start_cap = stub_cap side_ending.draw(pen) paper.merge(pen.paper) bounds = paper.bounds() bounds.top = OVER bounds.bottom = MIDDLE bounds.left = 0 paper.override_bounds(bounds) return paper
def test_translate(): p = Pen() p.stroke_mode(1.0) p.move_to((0, 0)) p.turn_to(0) p.line_forward(3) p.arc_left(90, 3) p.turn_left(90) p.move_forward(3) p.fill_mode() p.circle(0.5) p.move_forward(3) p.square(1) p.paper.translate((1, 1)) assert_equal( p.paper.svg_elements(1), [ ( '<path d="M1.0,-1.5 L1.0,-0.5 L4.0,-0.5 A 3.5,3.5 0 0 0 ' '7.5,-4.0 L6.5,-4.0 A 2.5,2.5 0 0 1 4.0,-1.5 L1.0,-1.5 z" ' 'fill="#000000" />' ), ( '<path d="M4.5,-4.0 A 0.5,0.5 0 0 0 3.5,-4.0 ' 'A 0.5,0.5 0 0 0 4.5,-4.0 z" fill="#000000" />' ), ( '<path d="M0.5,-3.5 L1.5,-3.5 L1.5,-4.5 L0.5,-4.5 L0.5,-3.5 z" ' 'fill="#000000" />' ), ] )
def test_center_on_xy(): p = Pen() p.stroke_mode(2.0) p.move_to((0, 0)) p.turn_to(0) p.line_forward(4) p.move_to((2, 1)) p.circle(1) p.paper.center_on_x(0) assert_equal(p.paper.svg_elements(0), [ '<path d="M-2,-1 L-2,1 L2,1 L2,-1 L-2,-1 z" fill="#000000" />', '<path d="M2,-1 A 2,2 0 0 0 -2,-1 A 2,2 0 0 0 2,-1 z" fill="#000000" />', ]) p.paper.center_on_y(0) assert_equal(p.paper.svg_elements(1), [ ('<path d="M-2.0,0.0 L-2.0,2.0 L2.0,2.0 L2.0,0.0 L-2.0,0.0 z" ' 'fill="#000000" />'), ('<path d="M2.0,0.0 A 2.0,2.0 0 0 0 -2.0,0.0 ' 'A 2.0,2.0 0 0 0 2.0,0.0 z" fill="#000000" />'), ])
def test_mirror_end_slant(): paper = Paper() p = Pen() p.stroke_mode(sqrt2) p.move_to((0, 0)) p.turn_to(-45) p.line_forward(5 * sqrt2, end_slant=45) p.paper.mirror_x(0) paper.merge(p.paper) p = Pen() p.stroke_mode(sqrt2) p.move_to((0, 0)) p.turn_to(45) p.line_forward(5 * sqrt2) paper.merge(p.paper) paper.join_paths() paper.fuse_paths() assert_path_data( paper, 1, 'M-5.5,4.5 L-4.5,5.5 L5.5,-4.5 L4.5,-5.5 L-5.5,4.5 z' )
def test_translate(): p = Pen() p.stroke_mode(1.0) p.move_to((0, 0)) p.turn_to(0) p.line_forward(3) p.arc_left(90, 3) p.turn_left(90) p.move_forward(3) p.fill_mode() p.circle(0.5) p.move_forward(3) p.square(1) p.paper.translate((1, 1)) assert_equal(p.paper.svg_elements(1), [ ('<path d="M1.0,-1.5 L1.0,-0.5 L4.0,-0.5 A 3.5,3.5 0 0 0 ' '7.5,-4.0 L6.5,-4.0 A 2.5,2.5 0 0 1 4.0,-1.5 L1.0,-1.5 z" ' 'fill="#000000" />'), ('<path d="M4.5,-4.0 A 0.5,0.5 0 0 0 3.5,-4.0 ' 'A 0.5,0.5 0 0 0 4.5,-4.0 z" fill="#000000" />'), ('<path d="M0.5,-3.5 L1.5,-3.5 L1.5,-4.5 L0.5,-4.5 L0.5,-3.5 z" ' 'fill="#000000" />'), ])
def test_fuse_with_joint(): p = Pen() p.stroke_mode(2.0) p.move_to((0, 0)) p.turn_to(180) p.line_forward(5) p.turn_left(90) p.line_forward(5) p.break_stroke() p.move_to((0, 0)) p.turn_to(0) p.line_forward(5) assert_path_data(p, 0, [ 'M0,1 L0,-1 L-6,-1 L-6,5 L-4,5 L-4,1 L0,1 z', 'M0,-1 L0,1 L5,1 L5,-1 L0,-1 z', ]) p.paper.join_paths() p.paper.fuse_paths() assert_path_data(p, 0, 'M-6,5 L-4,5 L-4,1 L5,1 L5,-1 L-6,-1 L-6,5 z')
def test_center_on_xy(): p = Pen() p.stroke_mode(2.0) p.move_to((0, 0)) p.turn_to(0) p.line_forward(4) p.move_to((2, 1)) p.circle(1) p.paper.center_on_x(0) assert_equal( p.paper.svg_elements(0), [ '<path d="M-2,-1 L-2,1 L2,1 L2,-1 L-2,-1 z" fill="#000000" />', '<path d="M2,-1 A 2,2 0 0 0 -2,-1 A 2,2 0 0 0 2,-1 z" fill="#000000" />', ] ) p.paper.center_on_y(0) assert_equal( p.paper.svg_elements(1), [ ( '<path d="M-2.0,0.0 L-2.0,2.0 L2.0,2.0 L2.0,0.0 L-2.0,0.0 z" ' 'fill="#000000" />' ), ( '<path d="M2.0,0.0 A 2.0,2.0 0 0 0 -2.0,0.0 ' 'A 2.0,2.0 0 0 0 2.0,0.0 z" fill="#000000" />' ), ] )
def test_copy_arc_to(): p = Pen() p.fill_mode() p.move_to((0, 0)) p.turn_to(0) p.arc_to((5, 5)) p = p.copy(paper=True) assert_path_data(p, 0, 'M0,0 A 5,5 0 0 0 5,-5')
def test_copy_no_paper(): p1 = Pen() p1.fill_mode() p1.move_to((0, 0)) p1.turn_to(0) p1.line_forward(5) p2 = p1.copy() p2.line_forward(5) assert_path_data(p1, 0, 'M0,0 L5,0') assert_path_data(p2, 0, 'M5,0 L10,0')
def draw_template_path(): pen = Pen() pen.stroke_mode(0.05, '#466184') pen.turn_to(0) pen.move_to((0, BOTTOM)) pen.line_forward(10) pen.move_to((0, MIDDLE)) pen.line_forward(10) pen.move_to((0, TOP)) pen.line_forward(10) pen.paper.center_on_x(0) return pen.paper
def test_join_paths_thick(): # Segments join together if possible when join_paths is called. p = Pen() p.stroke_mode(2.0) p.move_to((0, 0)) p.turn_to(0) p.line_forward(5) p.break_stroke() p.turn_left(90) p.line_forward(5) p.paper.join_paths() assert_path_data(p, 0, 'M0,-1 L0,1 L6,1 L6,-5 L4,-5 L4,-1 L0,-1 z')
def test_copy_arc_to(): p = Pen() p.fill_mode() p.move_to((0, 0)) p.turn_to(0) p.arc_to((5, 5)) p = p.copy(paper=True) assert_path_data( p, 0, 'M0,0 A 5,5 0 0 0 5,-5' )
def test_copy_arc(): p1 = Pen() p1.fill_mode() p1.move_to((0, 0)) p1.turn_to(0) p1.arc_left(90, radius=5) p2 = p1.copy(paper=True) p2.arc_left(90, radius=5) assert_path_data(p1, 0, 'M0,0 A 5,5 0 0 0 5,-5') assert_path_data(p2, 0, 'M0,0 A 5,5 0 0 0 5,-5 A 5,5 0 0 0 0,-10')
def test_fuse_paths(): # Create two halves of a stroke in the same direction. p = Pen() p.stroke_mode(sqrt2) p.move_to((-3, 3)) p.turn_to(-45) p.line_forward(3 * sqrt2, start_slant=0) p.line_forward(3 * sqrt2, end_slant=0) p.paper.fuse_paths() assert_path_data(p, 1, ['M-2.0,-3.0 L-4.0,-3.0 L2.0,3.0 L4.0,3.0 L-2.0,-3.0 z'])
def test_join_paths_thick(): # Segments join together if possible when join_paths is called. p = Pen() p.stroke_mode(2.0) p.move_to((0, 0)) p.turn_to(0) p.line_forward(5) p.break_stroke() p.turn_left(90) p.line_forward(5) p.paper.join_paths() assert_path_data( p, 0, 'M0,-1 L0,1 L6,1 L6,-5 L4,-5 L4,-1 L0,-1 z' )
def test_fuse_paths(): # Create two halves of a stroke in the same direction. p = Pen() p.stroke_mode(sqrt2) p.move_to((-3, 3)) p.turn_to(-45) p.line_forward(3 * sqrt2, start_slant=0) p.line_forward(3 * sqrt2, end_slant=0) p.paper.fuse_paths() assert_path_data( p, 1, ['M-2.0,-3.0 L-4.0,-3.0 L2.0,3.0 L4.0,3.0 L-2.0,-3.0 z'] )
def test_copy_no_paper(): p1 = Pen() p1.fill_mode() p1.move_to((0, 0)) p1.turn_to(0) p1.line_forward(5) p2 = p1.copy() p2.line_forward(5) assert_path_data( p1, 0, 'M0,0 L5,0' ) assert_path_data( p2, 0, 'M5,0 L10,0' )
def draw_character(self, mode, fuse=True): bottom_ending = bottom_ending_class( self, self.bottom_straight, self.bottom_flipped, ) pen = Pen() pen.set_mode(mode) pen.move_to((0, TOP)) pen.turn_to(-90) pen.line_to_y(MIDDLE, start_slant=45) bottom_ending.draw(pen) if fuse: pen.paper.fuse_paths() pen.paper.center_on_x(0) return pen.paper
def test_join_paths_turn_back_no_joint(): p = Pen() p.stroke_mode(1.0) p.move_to((0, 0)) p.turn_to(0) p.line_forward(10) p.turn_right(180) p.break_stroke() p.line_forward(5) p.paper.join_paths() line1, line2 = p.last_path().segments assert line1.end_joint_illegal assert line2.start_joint_illegal assert_path_data(p, 1, ('M0.0,-0.5 L0.0,0.5 L10.0,0.5 L10.0,-0.5 ' 'L5.0,-0.5 L5.0,0.5 L10.0,0.5 L10.0,-0.5 L0.0,-0.5 z'))
def test_copy_arc(): p1 = Pen() p1.fill_mode() p1.move_to((0, 0)) p1.turn_to(0) p1.arc_left(90, radius=5) p2 = p1.copy(paper=True) p2.arc_left(90, radius=5) assert_path_data( p1, 0, 'M0,0 A 5,5 0 0 0 5,-5' ) assert_path_data( p2, 0, 'M0,0 A 5,5 0 0 0 5,-5 A 5,5 0 0 0 0,-10' )
def test_copy_custom_cap(): # Regression test for a bug where doing pen.copy() in a cap function would # break outline drawing. p = Pen() p.stroke_mode(2.0) p.move_to((0, 0)) p.turn_to(0) p.line_forward(5) p.turn_left(90) p.line_forward(5) def copy_cap(pen, end): pen.copy() pen.line_to(end) p.last_segment().end_cap = copy_cap assert_path_data(p, 0, 'M0,-1 L0,1 L6,1 L6,-5 L4,-5 L4,-1 L0,-1 z')
def test_join_and_fuse_simple(): # Create two halves of a stroke in separate directions. p = Pen() p.stroke_mode(sqrt2) p.move_to((0, 0)) p.turn_to(-45) p.line_forward(3 * sqrt2, end_slant=0) p.break_stroke() p.move_to((0, 0)) p.turn_to(-45 + 180) p.line_forward(3 * sqrt2, end_slant=0) p.paper.join_paths() p.paper.fuse_paths() assert_path_data(p, 1, 'M2.0,3.0 L4.0,3.0 L-2.0,-3.0 L-4.0,-3.0 L2.0,3.0 z')
def test_join_paths_turn_back_no_joint(): p = Pen() p.stroke_mode(1.0) p.move_to((0, 0)) p.turn_to(0) p.line_forward(10) p.turn_right(180) p.break_stroke() p.line_forward(5) p.paper.join_paths() line1, line2 = p.last_path().segments assert line1.end_joint_illegal assert line2.start_joint_illegal assert_path_data( p, 1, ( 'M0.0,-0.5 L0.0,0.5 L10.0,0.5 L10.0,-0.5 ' 'L5.0,-0.5 L5.0,0.5 L10.0,0.5 L10.0,-0.5 L0.0,-0.5 z' ) )
def test_copy_custom_cap(): # Regression test for a bug where doing pen.copy() in a cap function would # break outline drawing. p = Pen() p.stroke_mode(2.0) p.move_to((0, 0)) p.turn_to(0) p.line_forward(5) p.turn_left(90) p.line_forward(5) def copy_cap(pen, end): pen.copy() pen.line_to(end) p.last_segment().end_cap = copy_cap assert_path_data( p, 0, 'M0,-1 L0,1 L6,1 L6,-5 L4,-5 L4,-1 L0,-1 z' )
def test_paper_merge(): # Merge two drawings together. paper = Paper() p = Pen() p.fill_mode() p.turn_to(0) p.arc_left(180, 5) p.paper.center_on_x(0) paper.merge(p.paper) p = Pen() p.fill_mode() p.turn_to(180) p.arc_left(180, 5) p.paper.center_on_x(0) paper.merge(p.paper) assert_path_data(paper, 1, [ 'M-2.5,0.0 A 5.0,5.0 0 0 0 -2.5,-10.0', 'M2.5,0.0 A 5.0,5.0 0 0 0 2.5,10.0', ])
def test_join_and_fuse_simple(): # Create two halves of a stroke in separate directions. p = Pen() p.stroke_mode(sqrt2) p.move_to((0, 0)) p.turn_to(-45) p.line_forward(3 * sqrt2, end_slant=0) p.break_stroke() p.move_to((0, 0)) p.turn_to(-45 + 180) p.line_forward(3 * sqrt2, end_slant=0) p.paper.join_paths() p.paper.fuse_paths() assert_path_data( p, 1, 'M2.0,3.0 L4.0,3.0 L-2.0,-3.0 L-4.0,-3.0 L2.0,3.0 z' )
def test_mirror_end_slant(): paper = Paper() p = Pen() p.stroke_mode(sqrt2) p.move_to((0, 0)) p.turn_to(-45) p.line_forward(5 * sqrt2, end_slant=45) p.paper.mirror_x(0) paper.merge(p.paper) p = Pen() p.stroke_mode(sqrt2) p.move_to((0, 0)) p.turn_to(45) p.line_forward(5 * sqrt2) paper.merge(p.paper) paper.join_paths() paper.fuse_paths() assert_path_data(paper, 1, 'M-5.5,4.5 L-4.5,5.5 L5.5,-4.5 L4.5,-5.5 L-5.5,4.5 z')
def test_copy_log(): p1 = Pen() p1.fill_mode() p1.move_to((0, 0)) p1.turn_to(0) p1.line_forward(5) p2 = p1.copy(paper=True) p2.line_forward(5) assert_equal(p1.log(), [ 'fill_mode()', 'move_to((0, 0))', 'turn_to(0)', 'line_forward(5)', ]) assert_path_data(p1, 0, 'M0,0 L5,0') assert_equal(p2.log(), [ 'fill_mode()', 'move_to((0, 0))', 'turn_to(0)', 'line_forward(5)', 'line_forward(5)', ]) assert_path_data(p2, 0, 'M0,0 L5,0 L10,0')
def draw(): p = Pen() # Draw sine waves in various widths. for width in [0.01, 0.1, 0.3, 0.5, 0.8, 1.0]: p.stroke_mode(width) func = sine_func_factory( amplitude=1.0, frequency=4 / math.pi, phase=0, ) p.parametric( func, start=0, end=10, step=0.1, ) # Next line. p.turn_to(-90) p.move_forward(1.0 + 2 * width) return p.paper
from canoepaddle import Pen p = Pen() p.fill_mode('green') p.move_to((0, 0)) p.turn_to(0) radius = 0.01 for _ in range(200): p.circle(radius) p.turn_left(20) new_radius = radius * 1.05 p.move_forward(radius + new_radius) radius = new_radius print(p.paper.format_svg())
def get_pen(): p = Pen() p.outline_mode(2.0, 0.2, 'black') p.move_to((0, 0)) p.turn_to(0) return p
from canoepaddle import Pen p = Pen() def arm(inner=1.5, outer=3): p.stroke_mode(1.0) p.move_forward(inner) p.turn_right(90) p.arc_right(200, radius=outer) p.fill_mode() p.circle(0.5) # Makeshift round endcaps. orientation = 70 p.stroke_mode(1.0) p.move_to((0, 0)) p.circle(1.5) p.move_to((0, 0)) p.turn_to(orientation) arm() p.move_to((0, 0)) p.turn_to(180 + orientation) arm() print(p.paper.format_svg())
def draw_character(self, mode, fuse=True): side_ending = self.side_ending_class(self, self.side_flipped) bottom_ending = self.bottom_ending_class( self, self.bottom_straight, self.bottom_flipped, ) paper = Paper() # When drawing the body of the consonant, subclasses will start # where the side ending is, and end where the bottom ending is. pen = Pen() pen.set_mode(mode) pen.move_to((0, TOP - pen.mode.width / 2)) side_ending_position = pen.position self.draw(pen) bottom_ending_position = pen.position bottom_ending_heading = pen.heading paper.merge(pen.paper) # Draw the side ending. pen = Pen() pen.set_mode(mode) pen.move_to(side_ending_position) pen.turn_to(0) side_ending.draw(pen) paper.merge(pen.paper) # Draw the bottom ending. pen = Pen() pen.set_mode(mode) pen.move_to(bottom_ending_position) # If the bottom orientation is slanted left, then we have to # start the bottom ending from a flipped heading so when it flips # again later it will be correct. if not self.bottom_straight and self.bottom_flipped: bottom_ending_heading = bottom_ending_heading.flipped_x() pen.turn_to(bottom_ending_heading) # Draw the ending, and maybe flip it horizontally. bottom_ending.draw(pen) if not self.bottom_straight and self.bottom_flipped: pen.paper.mirror_x(bottom_ending_position.x) paper.merge(pen.paper) if fuse: paper.join_paths() paper.fuse_paths() # Override the bounds so that the letter reaches the full line height. bounds = paper.bounds() bounds.bottom = UNDER bounds.top = OVER paper.override_bounds(bounds) # We need to center on x=0 here because otherwise flipped # consonants wouldn't flip at the right x value. paper.center_on_x(0) return paper
def f(n): a = 12 b = 0.03 c = 0.2 d = 1.5 e = 0.5 wobble = a * math.exp(-b * n) * math.sin(c * n + d * n**e) return ( Angle(-24 + wobble), Angle(24 + wobble), ) center_heading = Heading(90) center = p.position p.turn_to(center_heading) num_layers = 26 for layer in range(num_layers): lo, hi = f(layer) lo = center_heading + lo hi = center_heading + hi p.arc_right((p.heading - lo) + 90, center=center) p.arc_left(180, 1) p.arc_left((hi - p.heading) + 90, center=center) if layer < (num_layers - 1): p.arc_right(180, 1) print(p.paper.format_svg(resolution=720 / p.paper.bounds().width))
a = 12 b = 0.03 c = 0.2 d = 1.5 e = 0.5 wobble = a * math.exp(-b * n) * math.sin(c * n + d * n**e) return ( Angle(-24 + wobble), Angle(24 + wobble), ) center_heading = Heading(90) center = p.position p.turn_to(center_heading) num_layers = 26 for layer in range(num_layers): lo, hi = f(layer) lo = center_heading + lo hi = center_heading + hi p.arc_right((p.heading - lo) + 90, center=center) p.arc_left(180, 1) p.arc_left((hi - p.heading) + 90, center=center) if layer < (num_layers - 1): p.arc_right(180, 1) print(p.paper.format_svg(resolution=720 / p.paper.bounds().width))
def test_arc_segment_bounds(): # Arc which occupies its entire circle. p = Pen() p.fill_mode() p.move_to((1, 0)) p.turn_to(90) p.arc_left(359, 1) arc = p.last_segment() assert_equal( arc.bounds(), Bounds(-1, -1, 1, 1) ) # Arc which pushes the boundary only with the endpoints. p = Pen() p.fill_mode() p.move_to((0, 0)) p.turn_to(30) p.move_forward(1) p.turn_left(90) p.arc_left(30, center=(0, 0)) arc = p.last_segment() assert_equal( arc.bounds(), Bounds(0.5, 0.5, sqrt3 / 2, sqrt3 / 2) ) # Arc which pushes the boundary with the middle in one spot. p = Pen() p.fill_mode() p.move_to((0, 0)) p.turn_to(-45) p.move_forward(1) p.turn_left(90) p.arc_left(90, center=(0, 0)) arc = p.last_segment() assert_equal( arc.bounds(), Bounds(sqrt2 / 2, -sqrt2 / 2, 1, sqrt2 / 2) ) # Arc which goes right. p = Pen() p.fill_mode() p.move_to((0, 0)) p.turn_to(45) p.arc_right(90, 3) arc = p.last_segment() assert_equal( arc.bounds(), Bounds(0, 0, 3 * sqrt2, 3 - 1.5 * sqrt2) ) # Arc which pushes the boundary with the middle in two spots. p = Pen() p.fill_mode() p.move_to((0, 0)) p.turn_to(-45) p.move_forward(1) p.turn_left(90) p.arc_left(180, center=(0, 0)) arc = p.last_segment() assert_equal( arc.bounds(), Bounds(-sqrt2 / 2, -sqrt2 / 2, 1, 1) ) # Half circle, right side p = Pen() p.fill_mode() p.move_to((0, 0)) p.turn_to(0) p.arc_right(180, 5) arc = p.last_segment() assert_equal( arc.bounds(), Bounds(0, -10, 5, 0) ) # Thick circle, p = Pen() p.stroke_mode(1.0) p.move_to((0, 0)) p.turn_to(0) p.move_forward(5) p.turn_left(90) p.arc_left(180, 5, start_slant=45) arc = p.last_segment() assert_equal( arc.bounds(), Bounds(-5.5, -0.5314980314970469, 5.5, 5.5) )