不喜欢只给程序,给出链接网页链接,主要讲述一下两点确认直线,点到直线距离,两条直线的交点等问题的解决方法,并给出python程序。之前的回答太复杂,方法选的好,求交点不需要判断太多内容。网页链接
```python
def GeneralEquation(first_x,first_y,second_x,second_y):
# 一般式 Ax+By+C=0
# from http://www.cnblogs.com/DHUtoBUAA/
A=second_y-first_y
B=first_x-second_x
C=second_x*first_y-first_x*second_y
return A,B,C
```
```python
def GetIntersectPointofLines(x1,y1,x2,y2,x3,y3,x4,y4):
# from http://www.cnblogs.com/DHUtoBUAA/
A1,B1,C1=GeneralEquation(x1,y1,x2,y2)
A2, B2, C2 = GeneralEquation(x3,y3,x4,y4)
m=A1*B2-A2*B1
if m==0:
print("平行,无交点")
else:
x=(C2*B1-C1*B2)/m
y=(C1*A2-C2*A1)/m
return x,y
```