Determine the intersection Point of the two Diagonals in a quadrilateral
7 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
John
el 17 de Mayo de 2013
Comentada: Ryan Cho
el 20 de Dic. de 2017
Hey people,
is there an easy way of dermining the intersection points of two diagonals in a quadriliteral??
Doing it by hand is quite hard since there are many special cases to consider. maybe there is already a function that helps solving the problem?
With best regards, John
1 comentario
Ryan Cho
el 20 de Dic. de 2017
If you are doing this on a graph get the x values of the coordinates and average them, then get the y values of the coordiantes and averagae them and then there you go (I've only tried this with parralellograms so far bu good luck)
Respuesta aceptada
Image Analyst
el 17 de Mayo de 2013
Calculate the equation of the two lines and set them equal, and solve for x, and then plug in x into either equation and get y. Just basic math
m1*x+b1 = m2*x+b2
and so on to solve for x. m is just the slope deltaY/deltaX you get from using your two diagonal points. You can use
coeffs = polyfit(x,y,1); % coeffs(1) = m, coeffs(2) = b
if you want.
4 comentarios
Image Analyst
el 17 de Mayo de 2013
You HAVE to know the order of the points going around the quadrilateral. If you don't know the order, then there are multiple possible quadrilaterals you could build from the same set of points. So, because you must know the order, your diagonals are always points 1 and 3, and points 2 and 4. Always.
Más respuestas (1)
Ver también
Categorías
Más información sobre Operating on Diagonal Matrices en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!