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_text_centered(): p = Pen() p.move_to((0, 0)) p.text('abcd', 1, 'sans-serif', centered=True) svg_data = p.paper.format_svg(0) assert ( '<text x="0" y="0" font-family="sans-serif" font-size="1" ' 'fill="#000000" text-anchor="middle">abcd</text>' ) in svg_data
def test_text(): p = Pen() p.move_to((0, 0)) p.text('abcd', 1, 'sans-serif') svg_data = p.paper.format_svg(0) assert ( '<text x="0" y="0" font-family="sans-serif" font-size="1" ' 'fill="#000000">abcd</text>' ) in svg_data
def test_draw_bounds(): p = Pen() p.fill_mode() Bounds(-2, -3, 1, 2).draw(p) assert_path_data( p, 0, 'M-2,3 L1,3 L1,-2 L-2,-2 L-2,3 z' )
def handle_letter(letter, mode): letter_paper = draw_letter( letter, mode, fixed_width=30.0, show_template=True, fuse=False, ) letter_paper.translate((5, 0), bounds=False) p = Pen() p.move_to((-8, 3)) p.text( letter.case, 6.0, font, gray, centered=True, ) p.move_to((-8, -3)) p.text( ', '.join(lookup(letter.case)), 6.0, font, gray, centered=True, ) letter_paper.merge(p.paper) return letter_paper
def test_copy_no_mode(): p = Pen() assert_raises( AttributeError, lambda: p.mode ) p = p.copy() assert_raises( AttributeError, lambda: p.mode )
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_text_translate(): p = Pen() p.move_to((0, 0)) p.text('abcd', 1) paper = p.paper paper.translate((2, 3)) svg_data = paper.format_svg(0) assert ( '<text x="2" y="-3" font-family="sans-serif" font-size="1" ' 'fill="#000000">abcd</text>' ) in svg_data
def test_translate_override_bounds(): # Translate a paper that has overridden bounds. The bounds update as well. paper = Paper() paper.override_bounds(0, 0, 1, 1) paper.translate((3, 4)) assert_equal( paper.bounds(), Bounds(3, 4, 4, 5) ) # When bounds=False is passed, then the bounds do not update. paper = Paper() paper.override_bounds(0, 0, 1, 1) paper.translate((3, 4), bounds=False) assert_equal(paper.bounds(), Bounds(0, 0, 1, 1)) # This also works if the bounds are not overridden. p = Pen() p.fill_mode() p.move_to((0.5, 0.5)) p.circle(0.5) assert_equal(p.paper.bounds(), Bounds(0, 0, 1, 1)) p.paper.translate((3, 4), bounds=False) assert_equal(p.paper.bounds(), Bounds(0, 0, 1, 1)) assert_equal(p.last_path().bounds(), Bounds(3, 4, 4, 5))
def test_copy_loop(): p = Pen() p.stroke_mode(0.2) def square(): p.turn_to(180) p.line_forward(1) p.turn_left(90) p.line_forward(1) p.turn_left(90) p.line_forward(1) p.turn_left(90) p.line_forward(1) p.move_to((0, 0)) square() p = p.copy(paper=True) p.move_to((2, 0)) square() assert_path_data( p, 1, ( 'M0.1,-0.1 L-1.1,-0.1 L-1.1,1.1 L0.1,1.1 L0.1,-0.1 z ' 'M-0.1,0.1 L-0.1,0.9 L-0.9,0.9 L-0.9,0.1 L-0.1,0.1 z ' 'M2.1,-0.1 L0.9,-0.1 L0.9,1.1 L2.1,1.1 L2.1,-0.1 z ' 'M1.9,0.1 L1.9,0.9 L1.1,0.9 L1.1,0.1 L1.9,0.1 z' ) )
def test_text_merge(): p = Pen() p.move_to((0, 0)) p.text('abcd', 1) paper1 = p.paper assert '<text' in paper1.format_svg(0) paper2 = Paper() paper2.merge(paper1) assert '<text' in paper2.format_svg(0) paper3 = Paper() paper3.merge_under(paper1) assert '<text' in paper3.format_svg(0)
def draw_letter( letter, mode, fixed_width=None, show_template=False, show_bounds=False, fuse=True, ): """ Draw the given letter and return a Paper. The letter is located centered on x=0, and with y=0 as the character baseline. If `fixed_width` is specified, use that for the paper width. """ if DEBUG_OUTPUT: print(str(letter), file=sys.stderr) try: character_paper = letter.draw_character(mode, fuse=fuse) except Exception: if DEBUG_OUTPUT: traceback.print_exc() # Return an error pattern. pen = Pen() pen.fill_mode() pen.square(1) character_paper = pen.paper else: raise if fixed_width is not None: bounds = character_paper.bounds() bounds.left = -fixed_width / 2 bounds.right = +fixed_width / 2 character_paper.override_bounds(bounds) template_paper = Paper() if show_template: template_paper = draw_template_path() else: template_paper = Paper() letter_paper = Paper() letter_paper.merge(template_paper) letter_paper.merge(character_paper) # Set proper bounds for typesetting. Use the character bounds as our basis # so the template doesn't increase the size. bounds = character_paper.bounds() letter_paper.override_bounds(bounds) if show_bounds: pen = Pen() pen.fill_mode('#aaa') bounds.draw(pen) letter_paper.merge_under(pen.paper) return letter_paper
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 test_override_bounds_copy(): # Get the bounds of a Paper, modify them, then set them back changed. paper = Paper() paper.override_bounds(0, 0, 1, 1) bounds = paper.bounds() bounds.right = 5 assert_equal(paper.bounds(), Bounds(0, 0, 1, 1)) paper.override_bounds(bounds) assert_equal(paper.bounds(), Bounds(0, 0, 5, 1)) # This works on non-overridden Papers as well. paper = Paper() p = Pen() p.fill_mode() p.move_to((0.5, 0.5)) p.circle(0.5) bounds = p.paper.bounds() bounds.right = 5 assert_equal(p.paper.bounds(), Bounds(0, 0, 1, 1)) p.paper.override_bounds(bounds) assert_equal(p.paper.bounds(), Bounds(0, 0, 5, 1))
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 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_circle_bounds(): p = Pen() p.fill_mode() p.move_to((1, 1)) p.circle(1.5) assert_equal( p.paper.bounds(), Bounds(-0.5, -0.5, 2.5, 2.5) )
def draw_character(self, mode, **kwargs): bottom_ending = self.bottom_ending_class( self, self.bottom_straight, self.bottom_flipped, ) pen = Pen() pen.set_mode(mode) pen.move_to((0, MIDDLE - 0.5)) self.draw(pen) bottom_ending.draw(pen) paper = pen.paper bounds = paper.bounds() bounds.top = MIDDLE bounds.bottom = UNDER paper.override_bounds(bounds) return paper
def test_square_bounds(): p = Pen() p.fill_mode() p.move_to((1, 1)) p.square(4) assert_equal( p.paper.bounds(), Bounds(-1, -1, 3, 3) )
def test_text_translate(): p = Pen() p.move_to((0, 0)) p.text('abcd', 1) paper = p.paper paper.translate((2, 3)) svg_data = paper.format_svg(0) assert ('<text x="2" y="-3" font-family="sans-serif" font-size="1" ' 'fill="#000000">abcd</text>') in svg_data
def test_translate_override_bounds(): # Translate a paper that has overridden bounds. The bounds update as well. paper = Paper() paper.override_bounds(0, 0, 1, 1) paper.translate((3, 4)) assert_equal(paper.bounds(), Bounds(3, 4, 4, 5)) # When bounds=False is passed, then the bounds do not update. paper = Paper() paper.override_bounds(0, 0, 1, 1) paper.translate((3, 4), bounds=False) assert_equal(paper.bounds(), Bounds(0, 0, 1, 1)) # This also works if the bounds are not overridden. p = Pen() p.fill_mode() p.move_to((0.5, 0.5)) p.circle(0.5) assert_equal(p.paper.bounds(), Bounds(0, 0, 1, 1)) p.paper.translate((3, 4), bounds=False) assert_equal(p.paper.bounds(), Bounds(0, 0, 1, 1)) assert_equal(p.last_path().bounds(), Bounds(3, 4, 4, 5))
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
def draw(): p = Pen() p.fill_mode() p.move_to((0, 0)) p.circle(2) paper1 = p.paper p = Pen() p.fill_mode() p.move_to((3, 0)) p.circle(1) paper2 = p.paper return paper1, paper2
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_join_paths(): # Join two paths starting from the same point. p = Pen() p.fill_mode() p.move_to((1, 0)) p.line_to((0, 0)) p.break_stroke() p.move_to((1, 0)) p.line_to((2, 0)) p.paper.join_paths() assert_path_data( p, 0, 'M0,0 L1,0 L2,0', ) # Join two paths that end in the same point. p = Pen() p.fill_mode() p.move_to((1, 0)) p.line_to((0, 0)) p.break_stroke() p.move_to((2, 0)) p.line_to((1, 0)) p.paper.join_paths() assert_path_data( p, 0, 'M0,0 L1,0 L2,0', ) # Join three paths going left in normal order. p = Pen() p.fill_mode() p.move_to((3, 0)) p.line_to((2, 0)) p.break_stroke() p.move_to((2, 0)) p.line_to((1, 0)) p.break_stroke() p.move_to((1, 0)) p.line_to((0, 0)) p.paper.join_paths() assert_path_data( p, 0, 'M3,0 L2,0 L1,0 L0,0', ) # Join three paths going right in normal order. p = Pen() p.fill_mode() p.move_to((0, 0)) p.line_to((1, 0)) p.break_stroke() p.move_to((1, 0)) p.line_to((2, 0)) p.break_stroke() p.move_to((2, 0)) p.line_to((3, 0)) p.paper.join_paths() assert_path_data( p, 0, 'M0,0 L1,0 L2,0 L3,0', ) # Join three paths going left in reverse order. p = Pen() p.fill_mode() p.move_to((1, 0)) p.line_to((0, 0)) p.break_stroke() p.move_to((2, 0)) p.line_to((1, 0)) p.break_stroke() p.move_to((3, 0)) p.line_to((2, 0)) p.paper.join_paths() assert_path_data( p, 0, 'M0,0 L1,0 L2,0 L3,0', ) # Join three paths going right in reverse order. p = Pen() p.fill_mode() p.move_to((2, 0)) p.line_to((3, 0)) p.break_stroke() p.move_to((1, 0)) p.line_to((2, 0)) p.break_stroke() p.move_to((0, 0)) p.line_to((1, 0)) p.paper.join_paths() assert_path_data( p, 0, 'M3,0 L2,0 L1,0 L0,0', ) # Join multiple paths together. p = Pen() p.fill_mode() p.move_to((1, 0)) p.line_to((0, 0)) p.break_stroke() p.move_to((1, 0)) p.line_to((1, 1)) p.break_stroke() p.move_to((1, 1)) p.line_to((2, 1)) p.break_stroke() p.move_to((2, 2)) p.line_to((2, 1)) p.break_stroke() p.paper.join_paths() assert_path_data( p, 0, 'M0,0 L1,0 L1,-1 L2,-1 L2,-2' ) # Join three paths so one path must reverse multiple times. p = Pen() p.fill_mode() p.move_to((2, 0)) p.line_to((1, 0)) p.break_stroke() p.move_to((2, 0)) p.line_to((3, 0)) p.break_stroke() p.move_to((1, 0)) p.line_to((0, 0)) p.paper.join_paths() assert_path_data( p, 0, 'M3,0 L2,0 L1,0 L0,0', )
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 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_loop(): # Already looped paths should not be affected by join_paths. p = Pen() p.fill_mode() p.move_to((0, 0)) p.square(2) target = 'M-1,1 L1,1 L1,-1 L-1,-1 L-1,1 z' assert_path_data(p, 0, target) p.paper.join_paths() assert_path_data(p, 0, target) # Loops can also be created by joining paths. p = Pen() p.fill_mode() p.move_to((0, 0)) p.line_to((1, 0)) p.line_to((1, 1)) p.break_stroke() p.line_to((0, 1)) p.line_to((0, 0)) p.paper.join_paths() assert_path_data( p, 0, 'M1,-1 L1,0 L0,0 L0,-1 L1,-1 z' ) # The joins can get complicated. p = Pen() p.fill_mode() p.move_to((3, 0)) p.line_to((2, 0)) p.break_stroke() p.move_to((1, 0)) p.line_to((2, 2)) p.break_stroke() p.move_to((4, 0)) p.line_to((3, 0)) p.break_stroke() p.move_to((1, 0)) p.line_to((2, 0)) p.break_stroke() p.move_to((4, 0)) p.line_to((2, 2)) p.paper.join_paths() assert_path_data( p, 0, 'M1,0 L2,-2 L4,0 L3,0 L2,0 L1,0 z', )
def test_join_paths_reference(): # Join paths in such a way that a single path object must be # used as both the "left" and "right" path in different joins. p = Pen() p.fill_mode() p.move_to((3, 0)) p.line_to((2, 0)) p.break_stroke() p.move_to((1, 0)) p.line_to((0, 0)) p.break_stroke() p.move_to((4, 0)) p.line_to((3, 0)) p.break_stroke() p.move_to((1, 0)) p.line_to((2, 0)) p.break_stroke() p.move_to((4, 0)) p.line_to((5, 0)) p.paper.join_paths() assert_path_data(p, 0, 'M5,0 L4,0 L3,0 L2,0 L1,0 L0,0')
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_no_mode(): p = Pen() assert_raises(AttributeError, lambda: p.mode) p = p.copy() assert_raises(AttributeError, lambda: p.mode)
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_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_paths(): # Join two paths starting from the same point. p = Pen() p.fill_mode() p.move_to((1, 0)) p.line_to((0, 0)) p.break_stroke() p.move_to((1, 0)) p.line_to((2, 0)) p.paper.join_paths() assert_path_data( p, 0, 'M0,0 L1,0 L2,0', ) # Join two paths that end in the same point. p = Pen() p.fill_mode() p.move_to((1, 0)) p.line_to((0, 0)) p.break_stroke() p.move_to((2, 0)) p.line_to((1, 0)) p.paper.join_paths() assert_path_data( p, 0, 'M0,0 L1,0 L2,0', ) # Join three paths going left in normal order. p = Pen() p.fill_mode() p.move_to((3, 0)) p.line_to((2, 0)) p.break_stroke() p.move_to((2, 0)) p.line_to((1, 0)) p.break_stroke() p.move_to((1, 0)) p.line_to((0, 0)) p.paper.join_paths() assert_path_data( p, 0, 'M3,0 L2,0 L1,0 L0,0', ) # Join three paths going right in normal order. p = Pen() p.fill_mode() p.move_to((0, 0)) p.line_to((1, 0)) p.break_stroke() p.move_to((1, 0)) p.line_to((2, 0)) p.break_stroke() p.move_to((2, 0)) p.line_to((3, 0)) p.paper.join_paths() assert_path_data( p, 0, 'M0,0 L1,0 L2,0 L3,0', ) # Join three paths going left in reverse order. p = Pen() p.fill_mode() p.move_to((1, 0)) p.line_to((0, 0)) p.break_stroke() p.move_to((2, 0)) p.line_to((1, 0)) p.break_stroke() p.move_to((3, 0)) p.line_to((2, 0)) p.paper.join_paths() assert_path_data( p, 0, 'M0,0 L1,0 L2,0 L3,0', ) # Join three paths going right in reverse order. p = Pen() p.fill_mode() p.move_to((2, 0)) p.line_to((3, 0)) p.break_stroke() p.move_to((1, 0)) p.line_to((2, 0)) p.break_stroke() p.move_to((0, 0)) p.line_to((1, 0)) p.paper.join_paths() assert_path_data( p, 0, 'M3,0 L2,0 L1,0 L0,0', ) # Join multiple paths together. p = Pen() p.fill_mode() p.move_to((1, 0)) p.line_to((0, 0)) p.break_stroke() p.move_to((1, 0)) p.line_to((1, 1)) p.break_stroke() p.move_to((1, 1)) p.line_to((2, 1)) p.break_stroke() p.move_to((2, 2)) p.line_to((2, 1)) p.break_stroke() p.paper.join_paths() assert_path_data(p, 0, 'M0,0 L1,0 L1,-1 L2,-1 L2,-2') # Join three paths so one path must reverse multiple times. p = Pen() p.fill_mode() p.move_to((2, 0)) p.line_to((1, 0)) p.break_stroke() p.move_to((2, 0)) p.line_to((3, 0)) p.break_stroke() p.move_to((1, 0)) p.line_to((0, 0)) p.paper.join_paths() assert_path_data( p, 0, 'M3,0 L2,0 L1,0 L0,0', )
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_two_pens_one_paper(): paper = Paper() p1 = Pen(paper) p2 = Pen(paper) p1.fill_mode() p2.fill_mode() p1.move_to((0, 0)) p2.move_to((0, 0)) p1.line_to((0, 1)) p2.line_to((2, 0)) assert_path_data(paper, 0, ['M0,0 L0,-1', 'M0,0 L2,0'])
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_join_paths_reference(): # Join paths in such a way that a single path object must be # used as both the "left" and "right" path in different joins. p = Pen() p.fill_mode() p.move_to((3, 0)) p.line_to((2, 0)) p.break_stroke() p.move_to((1, 0)) p.line_to((0, 0)) p.break_stroke() p.move_to((4, 0)) p.line_to((3, 0)) p.break_stroke() p.move_to((1, 0)) p.line_to((2, 0)) p.break_stroke() p.move_to((4, 0)) p.line_to((5, 0)) p.paper.join_paths() assert_path_data( p, 0, 'M5,0 L4,0 L3,0 L2,0 L1,0 L0,0' )
def test_join_paths_loop(): # Already looped paths should not be affected by join_paths. p = Pen() p.fill_mode() p.move_to((0, 0)) p.square(2) target = 'M-1,1 L1,1 L1,-1 L-1,-1 L-1,1 z' assert_path_data(p, 0, target) p.paper.join_paths() assert_path_data(p, 0, target) # Loops can also be created by joining paths. p = Pen() p.fill_mode() p.move_to((0, 0)) p.line_to((1, 0)) p.line_to((1, 1)) p.break_stroke() p.line_to((0, 1)) p.line_to((0, 0)) p.paper.join_paths() assert_path_data(p, 0, 'M1,-1 L1,0 L0,0 L0,-1 L1,-1 z') # The joins can get complicated. p = Pen() p.fill_mode() p.move_to((3, 0)) p.line_to((2, 0)) p.break_stroke() p.move_to((1, 0)) p.line_to((2, 2)) p.break_stroke() p.move_to((4, 0)) p.line_to((3, 0)) p.break_stroke() p.move_to((1, 0)) p.line_to((2, 0)) p.break_stroke() p.move_to((4, 0)) p.line_to((2, 2)) p.paper.join_paths() assert_path_data( p, 0, 'M1,0 L2,-2 L4,0 L3,0 L2,0 L1,0 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' )
return numpy.column_stack((t, c, s)) def draw_parametric_func(pen, f, t_range): txy_values = f(t_range) t, x, y = txy_values[0] pen.move_to((x, y)) for t, x, y in txy_values[1:]: pen.line_to((x, y)) mod = t % 1.0 if float_equal(mod, 0) or float_equal(mod, 1.0): pen.circle(0.01) step = 0.01 t_range = numpy.arange(-4 + step, 4, step) pen = Pen() pen.stroke_mode(0.01, 'green') draw_parametric_func(pen, euler_spiral_parametric, t_range) pen.fill_mode('green') pen.move_to((0.5, 0.5)) pen.circle(0.01) pen.move_to((-0.5, -0.5)) pen.circle(0.01) print(pen.paper.format_svg(5, resolution=500)) # TODO: euler spiral solver to end at a particular point. newton-raphson method for root finding convergence?
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_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' ) )
import math from canoepaddle import Pen from canoepaddle.heading import Heading, Angle p = Pen() p.paper.override_bounds(-120, -120, 120, 120) p.stroke_mode(1.0, '#15A') p.move_to((0.5, 0.5)) 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):
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 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')
black = '#260003' gray = '#233042' mode = StrokeOutlineMode(1.0, 0.2, red, black) papers = [] for consonant_class in consonants: letter = consonant_class(se.Normal, be.Normal) letter_paper = draw_letter( letter, mode, fixed_width=27.0, show_template=True, ) letter_paper.translate((5, 0), bounds=False) p = Pen() p.move_to((-5, 0)) p.text( convert_ascii_to_html(consonant_class.pronunciation), 8.0, 'Caudex', '#233042', centered=True, ) letter_paper.merge(p.paper) papers.append(letter_paper) page = typeset( papers, letter_spacing=1.0, letters_per_line=6,
from canoepaddle import Pen p = Pen() p.stroke_mode(0.15) def trefoil(origin, radius, num_leaves, leaf_angle, step=1): p.turn_to(90) points = [] for i in range(num_leaves): p.move_to(origin) p.turn_right(360 / num_leaves) p.move_forward(radius) points.append(p.position) p.move_to(points[0]) for i in range(num_leaves): next_point = points[((i + 1) * step) % num_leaves] p.turn_toward(origin) p.turn_right(leaf_angle / 2) p.arc_to(next_point) trefoil((-6, 6), 3, 3, 110) trefoil((0, 6), 2.7, 4, 120) trefoil((6, 6), 2.7, 4, 70) trefoil((-6, 0), 2.7, 5, 70) trefoil((0, 0), 2.7, 5, 130) trefoil((6, 0), 2.7, 5, 110, step=2) trefoil((-6, -6), 2.7, 31, 20, step=14) trefoil((0, -6), 3, 8, 120, step=3)
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) )
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_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 draw_character(self, mode, fuse=True): paper = Paper() top_ending = self.top_ending_class( self, self.top_straight, self.top_flipped, ) bottom_ending = self.bottom_ending_class( self, self.bottom_straight, self.bottom_flipped, ) # While drawing the body of the primary character, two copies of the # pen are created, one ready to draw each of the endings. pen = Pen() pen.set_mode(mode) top_pen, bottom_pen = self.draw(pen) top_start_position = top_pen.position bottom_start_position = bottom_pen.position # Draw the endings. # If the ending orientations are to the left, then we have to flip them # horizontally. # The top ending is drawn as if it were a bottom ending, so # mirror it to the top. if self.top_flipped: top_pen.turn_to(top_pen.heading.flipped_x()) top_pen.move_to(top_pen.position.flipped_y(MIDDLE)) top_pen.turn_to(top_pen.heading.flipped_y()) top_ending.draw(top_pen) top_pen.paper.mirror_y(MIDDLE) if self.top_flipped: top_pen.paper.mirror_x(top_start_position.x) if self.bottom_flipped: bottom_pen.turn_to(bottom_pen.heading.flipped_x()) bottom_ending.draw(bottom_pen) if self.bottom_flipped: bottom_pen.paper.mirror_x(bottom_start_position.x) paper.merge(pen.paper) paper.merge(top_pen.paper) paper.merge(bottom_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 test_line_segment_bounds(): # Fill mode segment. p = Pen() p.fill_mode() p.move_to((1, 0)) p.line_to((2, 3)) line = p.last_segment() assert_equal( line.bounds(), Bounds(1, 0, 2, 3) ) # Stroke mode segment. p = Pen() p.stroke_mode(sqrt2) p.move_to((0, 0)) p.line_to((5, 5)) line = p.last_segment() assert_equal( line.bounds(), Bounds(-0.5, -0.5, 5.5, 5.5) )
angle = 25 p.stroke_mode(0.30, gray) p.turn_to(90 - angle) p.arc_to(top) p.turn_left(180 - 2 * angle) p.arc_to(bottom) p.move_to((-2, 1)) eye() p.move_to((2, 1)) eye() # Ears. p.stroke_mode(1.0, gray) p.move_to((1, 5)) p.turn_to(20) p.line_forward(3.5) p.turn_to(-85) p.line_forward(4) p.move_to((-1, 5)) p.turn_to(180 - 20) p.line_forward(3.5) p.turn_to(180 + 85) p.line_forward(4) if __name__ == '__main__': p = Pen() draw(p) print(p.paper.format_svg())