Exemplo n.º 1
0
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()
Exemplo n.º 2
0
    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
Exemplo n.º 3
0
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()
Exemplo n.º 4
0
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?
Exemplo n.º 5
0
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?
Exemplo n.º 6
0
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()
Exemplo n.º 7
0
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)
Exemplo n.º 8
0
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
Exemplo n.º 9
0
def radius():
    return random.uniform(0, min(*canvas.get_size()) / 5)