def draw3(ctx, pixel_width, pixel_height, frame_no, frame_count):
width = 32
setup(ctx, pixel_width, pixel_height, width=width, startx=-width/2, starty=-width/2, background=Color(1))
a = 14
b = 6
d = 4
angle = (frame_no/frame_count)*2*math.pi*b/math.gcd(a, b)
print(angle)
Origin = (0, 0)
A = (-a, 0)
B = ((a-b)*math.cos(angle), (a-b)*math.sin(angle))
x = (a - b) * math.cos(angle) + d * math.cos((a - b) / b * angle)
y = (a - b) * math.sin(angle) - d * math.sin((a - b) / b * angle)
D = (x, y)
Polygon(ctx).of_points(create_spiro(a, b, d)).stroke(Color('skyblue'), line_width=0.2)
Polygon(ctx).of_points(create_spiro(a, b, d, 0.01, angle)).open().stroke(Color('red'), line_width=0.2)
Circle(ctx).of_center_radius(Origin, a).stroke(Color('darkgreen'), line_width=0.2)
Circle(ctx).of_center_radius(B, b).stroke(Color('blue'), line_width=0.2)
Circle(ctx).of_center_radius(B, 0.3).fill(Color('blue'))
Circle(ctx).of_center_radius(D, 0.3).fill(Color('black'))
Line(ctx).of_start_end(B, D).stroke(Color('black'), line_width=0.2)
def draw2(ctx, pixel_width, pixel_height, frame_no, frame_count):
width = 32
setup(ctx,
pixel_width,
pixel_height,
width=width,
startx=-width / 2,
starty=-width / 2,
background=Color(1))
a = 16
b = 13
d = 5
Polygon(ctx).of_points(create_spiro(a, b, d)).stroke(Color('firebrick'),
line_width=0.1)
a = 16
b = 9
d = 8
Polygon(ctx).of_points(create_spiro(a, b, d)).stroke(Color('goldenrod'),
line_width=0.1)
a = 16
b = 11
d = 6
Polygon(ctx).of_points(create_spiro(a, b, d)).stroke(Color('darkgreen'),
line_width=0.1)
def draw2(ctx, pixel_width, pixel_height, frame_no, frame_count):
width = 32
setup(ctx, pixel_width, pixel_height, width=width, startx=-width/2, starty=-width/2, background=Color(1))
a = 14
b = 6
d = 4
angle = 1
Origin = (0, 0)
A = (-a, 0)
B = ((a-b)*math.cos(angle), (a-b)*math.sin(angle))
x = (a - b) * math.cos(angle) + d * math.cos((a - b) / b * angle)
y = (a - b) * math.sin(angle) - d * math.sin((a - b) / b * angle)
D = (x, y)
Polygon(ctx).of_points(create_spiro(a, b, d)).stroke(Color('skyblue'), line_width=0.1)
Polygon(ctx).of_points(create_spiro(a, b, d, 0.01, angle)).open().stroke(Color('red'), line_width=0.1)
Circle(ctx).of_center_radius(Origin, a).stroke(Color('darkgreen'), line_width=0.1)
Circle(ctx).of_center_radius(Origin, 0.3).fill(Color('darkgreen'))
Line(ctx).of_start_end(Origin, A).stroke(Color('darkgreen'), line_width=0.1)
Text(ctx).of('a', (A[0]/2, A[1])).size(1.5).offset(0, -0.5).fill(Color('darkgreen'))
Circle(ctx).of_center_radius(B, b).stroke(Color('blue'), line_width=0.1)
Circle(ctx).of_center_radius(B, 0.3).fill(Color('blue'))
Text(ctx).of('b', (B[0], B[1]+b/2)).size(1.5).offset(0.5, 0).fill(Color('blue'))
Line(ctx).of_start_end(B, (B[0], B[1]+b)).stroke(Color('blue'), line_width=0.1)
Circle(ctx).of_center_radius(D, 0.3).fill(Color('black'))
Line(ctx).of_start_end(B, D).stroke(Color('black'), line_width=0.1)
Text(ctx).of('d', ((B[0]+D[0])/2, (B[1]+D[1])/2)).size(1.5).offset(0.5, 0.5).fill(Color('black'))
def draw(ctx, pixel_width, pixel_height, frame_no, frame_count):
width = 32
setup(ctx, pixel_width, pixel_height, width=width, startx=-width/2, starty=-width/2, background=Color(1))
a = 14
b = 6
d = 4
Polygon(ctx).of_points(create_spiro(a, b, d)).stroke(Color('skyblue'), line_width=0.1)
points = create_spiro(a, b, d, 0.5, 4)
Polygon(ctx).of_points(points).open().stroke(Color('red'), 0.1)
for p in points:
Circle(ctx).of_center_radius(p, 0.2).fill(Color(0))
def draw4(ctx, pixel_width, pixel_height, frame_no, frame_count):
setup(ctx, pixel_width, pixel_height, background=Color(0.8))
blue = Color('blue')
grey = Color(0.2)
thickness = 2
a0 = (50, 200)
b0 = (100, 200)
c0 = (100, 50)
d0 = (200, 50)
a1 = (200, 50)
b1 = (300, 50)
c1 = (350, 220)
d1 = (450, 200)
points = [a0, (*b0, *c0, *d0), (*b1, *c1, *d1)]
Polygon(ctx).of_points(points).open().stroke(blue, thickness)
show_bezier_points(ctx, (50, 200), (100, 200), (100, 50), (200, 50))
show_bezier_points(ctx, (200, 50), (300, 50), (350, 220), (450, 200))
Text(ctx).of('a0', a0).size(20).align_center().align_middle().offset_towards(b0, -20).fill(grey)
Text(ctx).of('b0', b0).size(20).align_center().align_middle().offset_towards(a0, -20).fill(grey)
Text(ctx).of('c0', c0).size(20).align_center().align_middle().offset_towards(d0, -20).fill(grey)
Text(ctx).of('d0/a1', d0).size(20).align_center().align_middle().offset(0, -20).fill(grey)
Text(ctx).of('b1', b1).size(20).align_center().align_middle().offset_towards(a1, -20).fill(grey)
Text(ctx).of('c1', c1).size(20).align_center().align_middle().offset_towards(d1, -20).fill(grey)
Text(ctx).of('d1', d1).size(20).align_center().align_middle().offset_towards(c1, -20).fill(grey)
def draw3(ctx, pixel_width, pixel_height, frame_no, frame_count):
setup(ctx, pixel_width, pixel_height, width=10, background=Color(0.8))
a = (1, 2)
b = (7, 2)
c = (3, 8)
d = (9, 8)
e = (5, 2)
f = (5, 8)
Polygon(ctx).of_points([a, b, d, c]).stroke(Color('blue'), line_width=.05)
ParallelMarker(ctx).of_start_end(
a,
b).with_length(.5).with_count(2).with_gap(0.15).stroke(Color('blue'),
line_width=.05)
ParallelMarker(ctx).of_start_end(
c,
d).with_length(.5).with_count(2).with_gap(0.15).stroke(Color('blue'),
line_width=.05)
ParallelMarker(ctx).of_start_end(a,
c).with_length(.5).stroke(Color('blue'),
line_width=.05)
ParallelMarker(ctx).of_start_end(b,
d).with_length(.5).stroke(Color('blue'),
line_width=.05)
Text(ctx).of('a', a).size(1).offset_towards(d, -0.5).fill(Color('red'))
Text(ctx).of('b', b).size(1).offset_towards(c, -0.5).fill(Color('red'))
Text(ctx).of('c', c).size(1).offset_towards(b, -0.9).fill(Color('red'))
Text(ctx).of('d', d).size(1).offset_towards(a, -0.5).fill(Color('red'))
def draw(ctx, width, height, frame_no, frame_count):
setup(ctx, width, height, width=5, background=Color(0.8))
# Get a polygon path object
path1 = Polygon(ctx).of_points([(0, 0), (1, 1), (0.5, 2), (0.5, 1)])\
.path()
# Get a text path object
path2 = Text(ctx).of("Path text", (0, 0)).font("Times").size(0.2)\
.align_left().align_top().path()
# Apply the polygon in various places
with Transform(ctx).translate(0.5, 1):
Path(ctx).of(path1).stroke(Color('darkgreen'), 0.1)
with Transform(ctx).translate(1, 2.5):
Path(ctx).of(path1).fill(Color('blue'))
with Transform(ctx).translate(2.5, 0.5).scale(2, 2):
Path(ctx).of(path1).fill(Color('orange')).stroke(Color('black'), 0.05)
# Apply the text in various places
with Transform(ctx).translate(0, 0):
Path(ctx).of(path2).fill(Color('black'))
with Transform(ctx).translate(2, 3):
Path(ctx).of(path2).stroke(Color('red'), 0.01)
with Transform(ctx).translate(2, 4).scale(2, 2):
Path(ctx).of(path2).fill(Color('yellow')).stroke(Color('black'), 0.01)
def draw3(ctx, pixel_width, pixel_height, frame_no, frame_count):
width = 32
setup(ctx,
pixel_width,
pixel_height,
width=width,
startx=-width / 2,
starty=-width / 2,
background=Color(1))
# x = [i/100 for i in range(1000)]
# y = [-sintri(i) for i in x]
# Polygon(ctx).of_points(zip(x, y)).open().stroke(Color('black'), line_width=0.1)
#
# x = [i/100 for i in range(1000)]
# y = [-costri(i) + 2 for i in x]
# Polygon(ctx).of_points(zip(x, y)).open().stroke(Color('black'), line_width=0.1)
#
# x = [i/100 for i in range(1000)]
# y = [-int(3*i/(2*math.pi)) - 2 for i in x]
# Polygon(ctx).of_points(zip(x, y)).open().stroke(Color('black'), line_width=0.1)
a = 16
b = 10
d = 7
Polygon(ctx).of_points(create_spiro_triangle(a, b, d)).fill(
Color('gold'), fill_rule=EVEN_ODD).stroke(Color('darkblue'),
line_width=0.1)
def draw4(ctx, pixel_width, pixel_height, frame_no, frame_count):
width = 32
setup(ctx,
pixel_width,
pixel_height,
width=width,
startx=-width / 2,
starty=-width / 2,
background=Color(1))
colors = [
Color('magenta', 0.7),
Color('red', 0.7),
Color('blue', 0.7),
Color('gold', 0.7),
]
for i, color in enumerate(colors):
a = 16
b = 10
d = 7
with Transform(ctx).rotate(i * math.pi / 6):
Polygon(ctx).of_points(create_spiro_triangle(a, b, d)).fill(
color, fill_rule=EVEN_ODD)
def draw(ctx, pixel_width, pixel_height, frame_no, frame_count):
setup(ctx, pixel_width, pixel_height, width=10, background=Color(0.8))
a = (1, 2)
b = (7, 2)
c = (3, 8)
d = (9, 8)
e = (5, 2)
f = (5, 8)
Polygon(ctx).of_points([a, b, d, c]).stroke(Color('blue'), line_width=.05)
Line(ctx).of_start_end(e, f).stroke(Color('blue'), line_width=.05)
AngleMarker(ctx).of_points(
b, a,
c).with_radius(.5).with_count(2).with_gap(0.15).stroke(Color('blue'),
line_width=.05)
AngleMarker(ctx).of_points(a, b, d).with_radius(.5).stroke(Color('blue'),
line_width=.05)
AngleMarker(ctx).of_points(
c, d,
b).with_radius(.5).with_count(2).with_gap(0.15).stroke(Color('blue'),
line_width=.05)
AngleMarker(ctx).of_points(a, c, d).with_radius(.5).stroke(Color('blue'),
line_width=.05)
AngleMarker(ctx).of_points(
e, f, d).with_radius(.5).as_right_angle().stroke(Color('blue'),
line_width=.05)
Text(ctx).of('a', a).size(1).offset_towards(d, -0.5).fill(Color('red'))
Text(ctx).of('b', b).size(1).offset_towards(c, -0.9).fill(Color('red'))
Text(ctx).of('c', c).size(1).offset_towards(b, -0.9).fill(Color('red'))
Text(ctx).of('d', d).size(1).offset_towards(a, -0.5).fill(Color('red'))
Text(ctx).of('e', e).size(1).offset_towards(f, -0.3).fill(Color('red'))
Text(ctx).of('f', f).size(1).offset_towards(e, -0.9).fill(Color('red'))
def draw(ctx, width, height, frame_no, frame_count):
setup(ctx, width, height, width=5, background=Color(0.8))
# Bezier objects can only be stroked as they do not contain an area.
Bezier(ctx).of_abcd((1, 1.5), (3, 0.5), (2, 2.5), (4, 1.5)).stroke(Color('darkgreen'), 0.1)
# Create a polygon with a bezier side
Polygon(ctx).of_points([(1, 4.5), (1, 2.5), (2, 3, 3, 4, 4, 2.5), (4, 4.5)]).fill(Color('red')).stroke(Color('blue'), 0.05)
def plot_easing_function(ctx, x, y, fn):
tw = Tween(0).ease(-100, 100, fn)
poly = [(i, tw[i]) for i in range(100)]
ctx.save()
ctx.translate(x, y)
Square(ctx).of_corner_size((0, -100), 100).stroke(Color(0.5), 2)
Polygon(ctx).of_points(poly).open().stroke(Color('red'), 2)
ctx.restore()
def draw3(ctx, pixel_width, pixel_height, frame_no, frame_count):
setup(ctx, pixel_width, pixel_height, background=Color(0.8))
blue = Color('blue')
red = Color('red')
thickness = 4
points = [(100, 250), (100, 50), (200, 100, 300, 200, 400, 50), (400, 250)]
Polygon(ctx).of_points(points).fill(red).stroke(blue, thickness)
def draw(ctx, width, height, frame_no, frame_count):
setup(ctx, width, height, width=500, background=Color(0.8))
# The polygon function is a convenience function that adds a polygon as a new path.
# You can fill or stroke it as you wish.
polygon(ctx, ((100, 100), (150, 50), (200, 150), (200, 200)))
ctx.set_source_rgba(*Color(1, 0, 0))
ctx.fill()
Polygon(ctx).of_points([(300, 100), (300, 150), (400, 200), (450, 100)]).open().stroke(Color('orange'), 10)
def draw(ctx, pixel_width, pixel_height, frame_no, frame_count):
setup(ctx, pixel_width, pixel_width, background=Color(0.8))
black = Color(0)
red = Color('red')
Polygon(ctx).of_points([
(150, 50),
(100, 250),
(250, 150),
(50, 150),
(200, 250),
]).fill(red).stroke(black, 5)
Polygon(ctx).of_points([
(450, 50),
(400, 250),
(550, 150),
(350, 150),
(500, 250),
]).fill(red, fill_rule=EVEN_ODD).stroke(black, 5)
def draw(ctx, pixel_width, pixel_height, frame_no, frame_count):
setup(ctx,
pixel_width,
pixel_height,
width=5,
background=Color(0.8))
# Get a polygon path object
path1 = Polygon(ctx).of_points([(0, 0), (1, 1), (0.5, 2),
(0.5, 1)]).path()
# Get a text path object
path2 = Text(ctx).of("Path text", (0, 0)).font(
"Times", weight=FONT_WEIGHT_BOLD).size(
0.2).align_left().align_top().path()
# Apply the polygon in various places
ctx.save()
ctx.translate(0.5, 1)
Path(ctx).of(path1).stroke(Color('darkgreen'), 0.1)
ctx.restore()
ctx.save()
ctx.translate(1, 2.5)
Path(ctx).of(path1).fill(Color('blue'))
ctx.restore()
ctx.save()
ctx.translate(2.5, 0.5)
ctx.scale(2, 2)
Path(ctx).of(path1).fill(Color('orange')).stroke(
Color('black'), 0.05)
ctx.restore()
# Apply the text in various places
ctx.save()
ctx.translate(0, 0)
Path(ctx).of(path2).fill(Color('black'))
ctx.restore()
ctx.save()
ctx.translate(2, 3)
Path(ctx).of(path2).stroke(Color('red'), 0.01)
ctx.restore()
ctx.save()
ctx.translate(2, 4)
ctx.scale(2, 2)
Path(ctx).of(path2).fill(Color('yellow')).stroke(
Color('black'), 0.01)
ctx.restore()
def draw(ctx, pixel_width, pixel_height, frame_no, frame_count):
setup(ctx, pixel_width, pixel_height, background=Color(0.8))
red = Color('red')
green = Color('green')
blue = Color('blue')
thickness = 2
Line(ctx).of_start_end((150, 150), (50, 50)).stroke(red, thickness)
Line(ctx).of_start_end((300, 150),
(200, 50)).as_ray().stroke(red, thickness)
Line(ctx).of_start_end((450, 150),
(350, 50)).as_line().stroke(red, thickness)
Triangle(ctx).of_corners((50, 200), (150, 200),
(125, 300)).stroke(green, thickness)
Square(ctx).of_corner_size((200, 200), 100).stroke(green, thickness)
Rectangle(ctx).of_corner_size((350, 200), 100, 75).stroke(green, thickness)
Polygon(ctx).of_points([(50, 350), (250, 400), (250, 500),
(50, 375)]).stroke(blue, thickness)
Polygon(ctx).of_points([(300, 350), (500, 400), (500, 500),
(300, 375)]).open().stroke(blue, thickness)
def draw2(ctx, pixel_width, pixel_height, frame_no, frame_count):
width = 32
setup(ctx,
pixel_width,
pixel_height,
width=width,
startx=-width / 2,
starty=-width / 2,
background=Color(1))
a = 16
b = 9
d = 6
Polygon(ctx).of_points(create_spiro_square(a, b, d)).fill(
Color('lime'),
fill_rule=EVEN_ODD) #.stroke(Color('darkblue'), line_width=0.1)
a = 17
b = 11
d = 10
Polygon(ctx).of_points(create_spiro_square(a, b, d)).fill(
Color('darkgreen', 0.4),
fill_rule=EVEN_ODD) #.stroke(Color('ligh'), line_width=0.1)
def draw(ctx, pixel_width, pixel_height, frame_no, frame_count):
width = 32
setup(ctx,
pixel_width,
pixel_height,
width=width,
startx=-width / 2,
starty=-width / 2,
background=Color(1))
a = 14
b = 6
d = 4
Polygon(ctx).of_points(create_spiro(a, b, d)).stroke(Color('red'),
line_width=0.1)
def draw3(ctx, pixel_width, pixel_height, frame_no, frame_count):
width = 32
setup(ctx,
pixel_width,
pixel_height,
width=width,
startx=-width / 2,
starty=-width / 2,
background=Color(1))
for i in range(6):
a = 13
b = 7
d = 5
with Transform(ctx).rotate(0.05 * i):
Polygon(ctx).of_points(create_spiro(a, b, d)).stroke(
Color('dodgerblue').with_l_factor(1.1**i), line_width=0.1)
def draw(ctx, width, height, frame_no, frame_count):
setup(ctx, width, height, background=Color(0.8))
red = Color('red')
thickness = 3
## Draw lines with ticks and paraticks
a = (50, 50)
b = (50, 150)
Line(ctx).of_start_end(a, b).stroke(red, thickness)
TickMarker(ctx).of_start_end(a, b).with_length(12).stroke(
red, thickness)
a = (100, 50)
b = (150, 150)
Line(ctx).of_start_end(a, b).stroke(red, thickness)
TickMarker(ctx).of_start_end(
a, b).with_length(12).with_count(2).with_gap(6).stroke(
red, thickness)
a = (250, 50)
b = (200, 150)
Line(ctx).of_start_end(a, b).stroke(red, thickness)
TickMarker(ctx).of_start_end(
a, b).with_length(12).with_count(3).with_gap(6).stroke(
red, thickness)
a = (350, 50)
b = (350, 150)
Line(ctx).of_start_end(a, b).stroke(red, thickness)
ParallelMarker(ctx).of_start_end(a, b).with_length(12).stroke(
red, thickness)
a = (400, 50)
b = (450, 150)
Line(ctx).of_start_end(a, b).stroke(red, thickness)
ParallelMarker(ctx).of_start_end(
a, b).with_length(12).with_count(2).with_gap(6).stroke(
red, thickness)
a = (550, 150)
b = (500, 50)
Line(ctx).of_start_end(a, b).stroke(red, thickness)
ParallelMarker(ctx).of_start_end(
a, b).with_length(12).with_count(3).with_gap(6).stroke(
red, thickness)
## Draw lines with angles
a = (50, 250)
b = (50, 450)
c = (150, 450)
Polygon(ctx).of_points((a, b, c)).open().stroke(red, thickness)
AngleMarker(ctx).of_points(
a, b, c).with_radius(24).with_gap(6).as_right_angle().stroke(
red, thickness)
a = (250, 250)
b = (200, 450)
c = (300, 450)
Polygon(ctx).of_points((a, b, c)).open().stroke(red, thickness)
AngleMarker(ctx).of_points(
a, b, c).with_count(3).with_radius(24).with_gap(6).stroke(
red, thickness)
a = (300, 250)
b = (400, 300)
c = (500, 300)
Polygon(ctx).of_points((a, b, c)).open().stroke(red, thickness)
AngleMarker(ctx).of_points(c, b,
a).with_radius(24).with_gap(6).stroke(
red, thickness)
a = (300, 350)
b = (400, 400)
c = (500, 400)
Polygon(ctx).of_points((a, b, c)).open().stroke(red, thickness)
AngleMarker(ctx).of_points(
a, b, c).with_count(2).with_radius(24).with_gap(6).stroke(
red, thickness)