What algorithm or formula can it be ascertained whether the point between the parallel straight?
There are two parallel straight equations:
a1x + b1y + c1 = 0
a2x + b2y + c2 = 0.
How to determine whether the P(x, y) point is between them?
For example, this is how:
n- the general vector normalized your direct,
A2- 1st and 2nd straight points, respectively
X- Checkpoint. Calculate the scalary works
(XA2, n)♪ The point lies inside if these works have the opposite sign.
Not necessarily parallel direct and stupid corner, we' corner. two Normal vector
n2♪ Then the following values should be established:
isFirstDirectionPositive- the sign of the polar work
(XA1, n1)(respectively, the result of the setting of the point in the first straight equation),
isSecondDirectionPositive- the sign of the polar work
(XA2, n2)(respectively, the result of the point set in the second straight equation) and
isAngleBetweenNormalsAcute- the sign of the polar work
(n1, n2)♪ You need a piece of work. All three The signs were positive.