def draw_grid(min_x, max_x, min_y, max_y): w, h = canvas.get_size() scale_x = w / (max_x - min_x) scale_y = h / (max_y - min_y) min_x, max_x = round(min_x), round(max_x) min_y, max_y = round(min_y), round(max_y) canvas.begin_updates() canvas.set_line_width(1) canvas.set_stroke_color(0.7, 0.7, 0.7) #Draw vertical grid lines: x = min_x while x <= max_x: if x != 0: draw_x = round(w / 2 + x * scale_x) + 0.5 canvas.draw_line(draw_x, 0, draw_x, h) x += 0.5 #Draw horizontal grid lines: y = min_y while y <= max_y: if y != 0: draw_y = round(h/2 + y * scale_y) + 0.5 canvas.draw_line(0, draw_y, w, draw_y) y += 0.5 #Draw x and y axis: canvas.set_stroke_color(0, 0, 0) canvas.draw_line(0, h/2, w, h/2) canvas.draw_line(w/2, 0, w/2, h) canvas.end_updates()
def __init__(self, xmin=0.0, ymin=0.0, xsize=None, ysize=None):
''' uses canvas size as default
'''
self.xmin = xmin
self.ymin = ymin
if xsize is None or ysize is None:
w, h = canvas.get_size()
if xsize is None:
xsize = w
if ysize is None:
ysize = h
self.xsize = xsize
self.ysize = ysize
def plot_function(func, color, min_x, max_x, min_y, max_y): #Calculate scale, set line width and color: w, h = canvas.get_size() origin_x, origin_y = w * 0.5, h * 0.5 scale_x = w / (max_x - min_x) scale_y = h / (max_y - min_y) canvas.set_stroke_color(*color) canvas.set_line_width(2) canvas.move_to(origin_x + scale_x * min_x, origin_y + func(min_x) * scale_y) #Draw the graph line: x = min_x while x <= max_x: x += 0.05 draw_x = origin_x + scale_x * x draw_y = origin_y + func(x) * scale_y canvas.add_line(draw_x, draw_y) canvas.set_fill_color(*color) canvas.draw_path()
def draw_heart(scale = 18): # 18 = full canvas
#print(scale) # useful for debugging
first_time = True
(xorigin, yorigin) = canvas.get_size()
xorigin *= 0.5 # in the center
yorigin *= 0.588 # north of center
detail = 100
canvas.begin_path()
for t in range(int(2 * math.pi * detail)):
t *= detail
x = scale * (16 * math.sin(t) ** 3)
y = scale * (13 * math.cos(t) - 5*math.cos(2*t) - 2*math.cos(3*t) - math.cos(4 * t))
if first_time: # hide the seams
canvas.move_to(x + xorigin, y + yorigin)
first_time = False
canvas.add_line(x + xorigin, y + yorigin)
canvas.set_line_width(1)
canvas.close_path()
canvas.draw_path() # try commenting out this line...
canvas.set_fill_color(1, 0, 0)
canvas.fill_path() # how do I fill just the inner part?
def draw_heart(scale = 18): # 18 = full canvas
#print(scale) # useful for debugging
first_time = True
(xorigin, yorigin) = canvas.get_size()
xorigin *= 0.5 # in the center
yorigin *= 0.588 # north of center
detail = 100
canvas.begin_path()
for t in xrange(int(2 * math.pi * detail)):
t *= detail
x = scale * (16 * math.sin(t) ** 3)
y = scale * (13 * math.cos(t) - 5*math.cos(2*t) - 2*math.cos(3*t) - math.cos(4 * t))
if first_time: # hide the seams
canvas.move_to(x + xorigin, y + yorigin)
first_time = False
canvas.add_line(x + xorigin, y + yorigin)
canvas.set_line_width(1)
canvas.close_path()
canvas.draw_path() # try commenting out this line...
canvas.set_fill_color(1, 0, 0)
canvas.fill_path() # how do I fill just the inner part?
def plot_function(t_, color, min_x,max_x,min_y,max_y):
#Calculate scale, set line width and color:
w, h = canvas.get_size()
scale_x = w / (max_x - min_x)
scale_y = h / (max_y - min_y)
scale_x = min(scale_x,scale_y)
scale_y=scale_x
origin_x, origin_y = -scale_x*min_x,-scale_y*min_y
canvas.set_stroke_color(*color)
canvas.set_line_width(2)
#Draw the graph line:
x = t_[0][0]
y = t_[0][1]
canvas.move_to(origin_x + scale_x * x,
origin_y + scale_y * y)
for p in t_[1:]:
x=p[0]
y=p[1]
draw_x = origin_x + scale_x * x
draw_y = origin_y + scale_y * y
canvas.add_line(*(draw_x, draw_y))
canvas.set_fill_color(*color)
canvas.draw_path()
originX = w / 2
originY = h / 2
for i in range(1, 300, 5):
x1 = originX
y1 = originY
x2 = 100 + i
y2 = 0
canvas.draw_line(x1, y1, x2, y2)
for i in range(1, 500, 5):
x1 = originX
y1 = originY
x2 = i
y2 = canvas.get_size()[0]
canvas.draw_line(x1, y1, x2, y2)
canvas.set_fill_color(0, 0.7, 0)
for i in range(40, 460, 20):
x = i + 5
y = originY - 5
canvas.fill_rect(x, y, 10, 10)
for i in range(40, 460, 20):
x = originX - 5
y = i + 5
canvas.fill_rect(x, y, 10, 10)
canvas.set_fill_color(0.5, 0, 0, 0.5)
def coordinates(radius):
w, h = canvas.get_size()
x = random.uniform(0, w - radius * 2)
y = random.uniform(0, h - radius * 2)
return x, y
def radius():
return random.uniform(0, min(*canvas.get_size()) / 5)