Google是你的朋友 [ ^ ]。

顺便说一下，两点之间的距离，你知道吗，是：

 sqrt（（x2-x1）*（x2-x1）+（y2-y1）*（y2-y1））

i need to draw a line between two ponits in an image by mouse click between two points..Then i want to calculate the distance between two points. how is it possible.. if anyone has any idea pls help me...



Aswathi Narayan

Google is your friend[^].
By the way, distance between two points, you know, is:

sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1))