CODEWITHSUNDEEP
objective-cmkmapviewmapkitmkpolylinemkmapitem
Deepak Singh
Deepak Singh

Reputation: 47

MKPolyline Intersecting coordinates ios

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I have an array of lat long coordinates through which I created a MKPolyline now I want to find the intersecting point coordinates lat long of two MKPolyline. For this I have tried MKPolyLine Intersects or not method but it only returns the bool value, not lat long coordinates. Also I have tried http://www.movable-type.co.uk/scripts/latlong.html to find out the mid point between 2 points but it's not working. So can we find the exact intersecting point between two MKPolyline.

Upvotes: 1

Views: 863

Answers (1)

rohit Sidpara
rohit Sidpara

Reputation: 547

Try This

CGFloat m1, c1, m2, c2;
CGFloat x11, y11, x12, y12; //line 1
CGFloat x21, y21, x22, y22; //line 2
CGFloat dx, dy;
CGFloat intersection_X, intersection_Y;


dx = x12 - x11;
dy = y12 - y11;

m1 = dy / dx;
c1 = y11 - m1 * x11; 



dx = x22 - x21;
dy = y22 - y21;

m2 = dy / dx;
c2 = y22 - m2 * x22; 


if( (m1 - m2) == 0)
{
    NSLog(@"No Intersection between the lines");
}
else
{
    intersection_X = (c2 - c1) / (m1 - m2);
    intersection_Y = m1 * intersection_X + c1;
}

Upvotes: 3

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