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c++ Programming Glossary: intersectionsOpenCV C++/Obj-C: Advanced square detection http://stackoverflow.com/questions/10533233/opencv-c-obj-c-advanced-square-detection sides of the square. Next locate the four resulting line intersections to detect the corners. The Hough transform is fairly robust.. probably have multiple lines on each side but locating the intersections should help to determine the inliers vs. outliers. Once you've.. the intersection from the lines detected... vector Point2f intersections for size_t i 0 i lines.size i for size_t j 0 j lines.size j..
http://stackoverflow.com/questions/3215817/ballistic-curve-problem finding the landing point is a matter of computing the intersections between that function and the function that defines the height.. terrain is very steep and hilly there could be more than 2 intersections in which case you take the first one with x greater than the..
how to determine whether a point lies inside a rectangle? [duplicate] http://stackoverflow.com/questions/6047248/how-to-determine-whether-a-point-lies-inside-a-rectangle to the point in question. Solve the linear equations for intersections between that segment and the segments that make up the rectangle... the point is inside the rectangle. Otherwise 0 or 2 intersections it's outside. This is trivial to extend to essentially any polygon.. to extend to essentially any polygon an odd number of intersections means the point is inside the polygon and an even number means..
find overlapping rectangles algorithm http://stackoverflow.com/questions/7727758/find-overlapping-rectangles-algorithm your fixed rectangles in the KD Tree. When you are testing intersections iterate through the KD Tree as follows function FindRects KDNode.. searchRect is the rectangle you want to test intersections with node is the current node. This is a recursive function.. actually have rects in them if node is child Test for intersections with each rectangle the node owns for each Rect nRect in node.Rects..
Area of rectangle-rectangle intersection http://stackoverflow.com/questions/8011267/area-of-rectangle-rectangle-intersection and then evaluate edge segments between critical points intersections or corners . At each intersection you switch between an edge.. are LOTS of details but the basic algorithm is to find all intersections and order them on their edges with an appropriate data structure... edge or vertex of the other triangle What if there are no intersections one rectangle is inside the other or they are disjoint you can..
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