Finding "points of intersection" of two sprites

Hello everyone!
I have a problem and I'm sort of desperate now. I have two overlapping sprites and I try to find the "line of symmetry" just from their position and rotation, nothing else... Check out the attached picture, if you want.


(The pink one is the children of the blue one and it has localScale.x = -1, it is mirrored. The sprites are moving.)

Basicly, I need to find the point A and B and then count the line's properties:
a = vecA.y/vecA.x;
b = vecB.y - a * vecB.x;

But my way of finding those points does not work. When the sprites move (the pink object has a velocity), it is slighty latened. So, I'd be really really REALLY glad for any tips. If anyone is able to help me, I'll draw his portrait as a superhero, that desperate I am
Thank you very much and have a nice day!
Vojta Koci

 

OK, solved now. The delay in my code was caused by a stupid mistake. I used FixedUpdate instead of Update... Thanks for reading!

 

how to find the point of intersect, iam eager to know?

 

Well, I solved it this way:

Vector3 vecA = Vector3.right;
Vector3 vecB = (sol.position + target.position)/2f;
vecB = RotatePointAroundPivot (vecB,dif, - sol.eulerAngles.z);
Matrix4x4 curM;
if(xScaleSign == 1)
curM = Matrix4x4.TRS (dif, Quaternion.Slerp(sol.rotation,target.rotation,0.5f)*Quaternion.AngleAxis(90, Vector3.forward), Vector3.one);
else
curM = Matrix4x4.TRS (dif, Quaternion.Slerp(sol.rotation,target.rotation,0.5f), Vector3.one).inverse;
vecA = curM.MultiplyVector(vecA);
if(xScaleSign == 1)
vecA = m.MultiplyVector(vecA);
else
vecA = m.inverse.MultiplyVector(vecA);

a = (vecA.y/vecA.x);
b = ((vecB.y - dif.y + yScale/2) - a * (vecB.x - dif.x + xScale/2))/yScale;

cola = (vecA.y/vecA.x);
colb = ((vecB.y - dif.y) - cola * (vecB.x - dif.x))/sol.lossyScale.y;

Does that make sense to you? vecA is the direction of the vector and vecB is a point the vector goes through...

 

k,i will try it.thanks