How to verify if a point lies between 2 vectors?

Math and Physics Programming

Started by bfogerty February 13, 2008 03:32 PM

2 comments, last by Boder 16 years, 2 months ago

123

Author

February 13, 2008 03:32 PM

How do you verify if a point lies between 2 vectors? If I have 2 2d vectors and a 2d point, how can I know that the point lies between the 2 vectors like in a radar view system? Thanks in advance!

Boder

935

February 13, 2008 04:12 PM

Could you just get the angles for the three vectors (treating point as a vector), and see that the one lies between the other two. Also making sure the distance from the origin is less than the length of the other vectors if need be.

Sirisian

2,263

February 13, 2008 09:37 PM

2 dot products. For the left vector use the right hand normal and for the right vector use the left hand normal. Take the vector of 2D point - center of the radar. Perform the dot product (v1.x*v2.x+v1.y*v2.y) and if it's > 0 for both then it's between the vectors. Research it and test it out on paper.