Python Wand path_curve_to_quadratic_bezier()用法及代碼示例

path_curve_to_quadratic_bezier()繪製從當前點到給定坐標的二次Bezier曲線。如果smooth為True，則假定控製點是上一個命令的控製點的反射，否則必須給出一對控製坐標。

用法： wand.drawing.path_curve_to_quadratic_bezier(to, controls, smooth, relative)

參數	輸入類型	描述
to	序列或(數字。實數，數字。實數)	代表要繪製到的坐標的一對。
control	collections.abc.sequence或(numbers.Real，numbers.Real)	用於影響曲線的坐標
smooth	bool	假設最後定義的控製坐標
relative	bool	將給定的坐標視為相對於當前點。

範例1：

from wand.image import Image 
from wand.drawing import Drawing 
from wand.color import Color 
  
with Drawing() as draw:
    draw.stroke_width = 2
    draw.stroke_color = Color('black') 
    draw.fill_color = Color('white') 
    draw.path_start() 
    # points list to determine curve  
    points = [(40, 10), # Start point  
              (20, 50), # First control  
              (90, 10), # Second control  
              (70, 40)] # End point 
    # Start middle-left 
    draw.path_move(to =(10, 100)) 
    # Curve accross top-left to center 
    draw.path_curve_to_quadratic_bezier(to =(100, 0), 
                    control = points, 
                    smooth = True, 
                    relative = True) 
    draw.path_finish() 
    with Image(width = 200,  
               height = 200,  
               background = Color('lightgreen')) as image:
        draw(image) 
        image.save(filename ="pathbcurve.png")

輸出：

範例2：

from wand.image import Image 
from wand.drawing import Drawing 
from wand.color import Color 
   
with Drawing() as draw:
    draw.stroke_width = 2
    draw.stroke_color = Color('black') 
    draw.fill_color = Color('white') 
    draw.path_start() 
    # Start middle-left 
    draw.path_move(to=(100, 100)) 
    # Curve accross top-left to center 
    draw.path_curve_to_quadratic_bezier(to=(100, 0), 
                                        control=[(20,50),(90,10)], 
                                        smooth=True,relative=True) 
      
    draw.path_finish() 
    with Image(width=200, height=200, background=Color('lightgreen')) as image:
        draw(image) 
        image.save(filename="pathbcurve.png")

輸出：

相關用法

注：本文由純淨天空篩選整理自RahulSabharwal大神的英文原創作品 Python – path_curve_to_quadratic_bezier() function in Wand。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。