注意
跳至結尾以下載完整的範例程式碼。
多邊形選擇器#
示範如何以程式或互動方式建立多邊形
import matplotlib.pyplot as plt
from matplotlib.widgets import PolygonSelector
以程式方式建立多邊形
fig, ax = plt.subplots()
fig.show()
selector = PolygonSelector(ax, lambda *args: None)
# Add three vertices
selector.verts = [(0.1, 0.4), (0.5, 0.9), (0.3, 0.2)]
以互動方式建立多邊形
fig2, ax2 = plt.subplots()
fig2.show()
selector2 = PolygonSelector(ax2, lambda *args: None)
print("Click on the figure to create a polygon.")
print("Press the 'esc' key to start a new polygon.")
print("Try holding the 'shift' key to move all of the vertices.")
print("Try holding the 'ctrl' key to move a single vertex.")
Click on the figure to create a polygon.
Press the 'esc' key to start a new polygon.
Try holding the 'shift' key to move all of the vertices.
Try holding the 'ctrl' key to move a single vertex.