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 show_bezier_points(ctx, a, b, c, d):
blue = Color('blue')
red = Color('red')
grey = Color(0.2)
thickness = 2
Bezier(ctx).of_abcd(a, b, c, d).stroke(blue, thickness)
Line(ctx).of_start_end(a, b).stroke(grey, thickness, dash=[5])
Line(ctx).of_start_end(c, d).stroke(grey, thickness, dash=[5])
Circle(ctx).of_center_radius(a, 5).fill(red)
Circle(ctx).of_center_radius(b, 5).fill(red)
Circle(ctx).of_center_radius(c, 5).fill(red)
Circle(ctx).of_center_radius(d, 5).fill(red)
def draw2(ctx, pixel_width, pixel_height, frame_no, frame_count):
setup(ctx, pixel_width, pixel_height, background=Color(0.8))
black = Color(0)
Line(ctx).of_start_end((50, 50), (450, 50)).stroke(black, 20, cap=SQUARE)
Line(ctx).of_start_end((50, 100), (450, 100)).stroke(black, 20, cap=BUTT)
Line(ctx).of_start_end((50, 150), (450, 150)).stroke(black, 20, cap=ROUND)
Line(ctx).of_start_end((50, 250), (450, 250)).stroke(black,
20,
cap=SQUARE,
dash=[30])
Line(ctx).of_start_end((50, 300), (450, 300)).stroke(black,
20,
cap=BUTT,
dash=[30])
Line(ctx).of_start_end((50, 350), (450, 350)).stroke(black,
20,
cap=ROUND,
dash=[30])
Line(ctx).of_start_end((50, 450), (450, 450)).stroke(black,
20,
cap=BUTT,
dash=[30, 40])
Line(ctx).of_start_end((50, 500), (450, 500)).stroke(black,
20,
cap=BUTT,
dash=[30, 10, 20, 10])
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, pixel_width, pixel_height, frame_no, frame_count):
setup(ctx, pixel_width, pixel_height, background=Color(0.4))
gradient = LinearGradient().of_points(
(150, 150), (350, 250)).with_start_end(Color('yellow'),
Color('red')).build()
Rectangle(ctx).of_corner_size((0, 0), 500, 400).fill(gradient)
Line(ctx).of_start_end((150, 150), (350, 250)).stroke(Color(0), 2, [5, 5])
Line(ctx).of_start_end((150, 150),
(250, -50)).as_line().stroke(Color(0), 2, [5, 5])
Line(ctx).of_start_end((350, 250),
(450, 50)).as_line().stroke(Color(0), 2, [5, 5])
Circle(ctx).of_center_radius((150, 150), 5).fill(Color(0))
Circle(ctx).of_center_radius((350, 250), 5).fill(Color(0))
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):
setup(ctx, pixel_width, pixel_width, background=Color(0.8))
black = Color(0)
Line(ctx).of_start_end((100, 50), (200, 50)).stroke(black, 20)
Line(ctx).of_start_end((200, 50), (100, 200)).stroke(black, 20)
Line(ctx).of_start_end((100, 200), (50, 200)).stroke(black, 20)
Line(ctx).of_start_end((50, 200), (100, 50)).stroke(black, 20)
Line(ctx).of_start_end((300, 50), (400, 50)).add()
Line(ctx).of_end((300, 200)).extend_path().add()
Line(ctx).of_end((250, 200)).extend_path().stroke(black, 20)
Line(ctx).of_start_end((500, 50), (600, 50)).add()
Line(ctx).of_end((500, 200)).extend_path().add()
Line(ctx).of_end((450, 200)).extend_path(close=True).stroke(black, 20)
def draw(ctx, width, height, frame_no, frame_count):
setup(ctx, width, height, width=6, background=Color(0.8))
for i in range(9):
angle = 2*math.pi*i/9
a = (1.5 + 1.5*(i%3), 1.5 + 1.5*(i//3))
b = (a[0] + math.cos(angle), a[1] + math.sin(angle))
Line(ctx).of_start_end(a, b).as_line().stroke(Color('fuchsia'), 0.05)
Circle(ctx).of_center_radius(a, .1).fill(Color(0))
def draw(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')
green = Color('green')
thickness = 4
Text(ctx).of('F', (40, 100)).size(100).fill(blue)
Line(ctx).of_start_end((100, 20), (100, 110)).stroke(green, thickness)
with Transform(ctx).scale(-1, 1, (100, 0)):
Text(ctx).of('F', (40, 100)).size(100).fill(red)
Text(ctx).of('W', (240, 100)).size(100).fill(blue)
Line(ctx).of_start_end((240, 70), (340, 70)).stroke(green, thickness)
with Transform(ctx).scale(1, -1, (0, 60)):
Text(ctx).of('W', (240, 100)).size(100).fill(red.with_a(0.6))
def draw(ctx, width, height, frame_no, frame_count):
setup(ctx, width, height, width=5, background=Color(0.8))
# The line function is a convenience function that adds a line as a new path.
# You can fill or stroke it as you wish.
line(ctx, (1, 1), (2, 3))
ctx.set_source_rgba(*Color(1, 0, 0))
ctx.set_line_width(0.1)
ctx.stroke()
# Line objects can only be stroked as they do not contain an area.
Line(ctx).of_start_end((3, 1), (4, 4)).stroke(Color('fuchsia'), 0.2)
def draw(ctx, width, height, frame_no, frame_count):
setup(ctx, width, height, width=300, background=Color(1))
# Fill then stroke a rectangle
ctx.save()
ctx.translate(0, 0)
Rectangle(ctx).of_corner_size((20, 20), 60, 60).fill(Color('red')).stroke(Color('blue'), 10)
ctx.restore()
# Stroke then fill a rectangle
ctx.save()
ctx.translate(100, 0)
Rectangle(ctx).of_corner_size((20, 20), 60, 60).stroke(Color('blue'), 10).fill(Color('red'))
ctx.restore()
# Path with two rectangles
ctx.save()
ctx.translate(200, 0)
Rectangle(ctx).of_corner_size((20, 20), 60, 60).add()
Rectangle(ctx).of_corner_size((30, 30), 60, 60).as_sub_path().fill(Color('red')).stroke(Color('blue'), 5)
ctx.restore()
# Path from several lines
ctx.save()
ctx.translate(0, 100)
Line(ctx).of_start_end((20, 20), (60, 30)).add()
Line(ctx).of_end((60, 60)).extend_path().add()
Line(ctx).of_end((30, 50)).extend_path().fill(Color('red')).stroke(Color('blue'), 5)
ctx.restore()
# Path from several lines, closed
ctx.save()
ctx.translate(100, 100)
Line(ctx).of_start_end((20, 20), (60, 30)).add()
Line(ctx).of_end((60, 60)).extend_path().add()
Line(ctx).of_end((30, 50)).extend_path(close=True).fill(Color('red')).stroke(Color('blue'), 5)
ctx.restore()
# roundrect open
ctx.save()
ctx.translate(0, 200)
Circle(ctx).of_center_radius((20, 20), 10).as_arc(math.pi, math.pi * 3 / 2).add()
Circle(ctx).of_center_radius((60, 20), 10).as_arc(math.pi * 3 / 2, 0).extend_path().add()
Circle(ctx).of_center_radius((60, 60), 10).as_arc(0, math.pi / 2).extend_path().add()
Circle(ctx).of_center_radius((20, 60), 10).as_arc(math.pi / 2, math.pi).extend_path().fill(
Color('red')).stroke(Color('blue'), 5)
ctx.restore()
# roundrect closed
ctx.save()
ctx.translate(100, 200)
Circle(ctx).of_center_radius((20, 20), 10).as_arc(math.pi, math.pi * 3 / 2).add()
Circle(ctx).of_center_radius((60, 20), 10).as_arc(math.pi * 3 / 2, 0).extend_path().add()
Circle(ctx).of_center_radius((60, 60), 10).as_arc(0, math.pi / 2).extend_path().add()
Circle(ctx).of_center_radius((20, 60), 10).as_arc(math.pi / 2, math.pi).extend_path(close=True).fill(
Color('red')).stroke(Color('blue'), 5)
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 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)