QT Question (general math really): How can I tell if an Ellipse and a Line have an intersection?

Posted by asdsa on Stack Overflow See other posts from Stack Overflow or by asdsa
Published on 2010-06-09T02:11:07Z Indexed on 2010/06/09 2:12 UTC
Read the original article Hit count: 152

Filed under:

qt

|

math

|

qt4

|

geometry

The ellipse is actually a circle. I know all the coordinates of both things, I just need to know whether or not a line goes through an ellipse.

Is this built in anywhere? SPecifically I am using QGraphicsEllipseIem and QLine but i can convert them to any other type

thanks

© Stack Overflow or respective owner

Related posts about qt

qt cannot open input file 'c:\Qt\qt\lib\qtmaind.lib'

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello, I am using qt 4.5 I have created a project and I want to compile on visual studio 2008 for windows mobile 6.0 So I have created the project files doing this: D:\Projects\Phone_PDA\Phone_PDA>set QMAKESPEC=win32-msvc2008 D:\Projects\Phone_PDA\Phone_PDA>qmake -tp vc The VS project was… >>> More
Qt Linking Error.

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I configure qt-x11 with following options ./configure -prefix /iTalk/qtx11 -prefix-install -bindir /iTalk/qtx11-install/bin -libdir /iTalk/qtx11-install/lib -docdir /iTalk/qtx11-install/doc -headerdir /iTalk/qtx11-install/include -datadir /iTalk/qtx11-install/data -examplesdir /iTalk/qtx11-install/examples… >>> More
To connect Gstreamer with Qt in order to play a gstreamer video in the Qt Widget

as seen on Stack Overflow - Search for 'Stack Overflow'
I tried using phonon to play the video but could not succeed. Off-late came to know through the Qt forums that even the latest version of Qt does not support phonon. Thats when i started using Gstreamer.Any suggestions as to how to connect the Gstreamer window with the Qt widget?My aim is to play… >>> More
How to mix C++ Qt objects and Qt Jambi objects

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I'm trying to combine some existing Qt code written in C++ with some code written in Java using Qt Jambi, but I'm not quite sure how to do it. I'm basically trying to acieve two things: Pass a QObject from C++ to Java using JNI Pass a Qt Jambi QObject from Java to C++ It looks like I can… >>> More
La rubrique Qt sur Facebook, devenez vous aussi fan et suivez l'actualité Qt depuis Facebook

as seen on Developper.com - Search for 'Developper.com'
Comme vous l'avez probablement remarqué, les réseaux sociaux explosent de partout, Developpez.com et toutes ses rubriques se doivent donc, comme toujours auparavant, de suivre l'évolution en s'ouvrant à ces réseaux sociaux. Vous pouvez donc désormais suivre l'actualité de la rubrique sur Facebook… >>> More

Related posts about math

how to make a function recursive

as seen on Stack Overflow - Search for 'Stack Overflow'
i have this huge function and i am wondering how to make it recursive. i have the base case which should never come true, so it should always go to else and keep calling itself with the variable t increases. any help would be great thanks def draw(x, y, t, planets): if 'Satellites' in planets["Moon"]: … >>> More
Sunrise / set calculations

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm trying to calculate the sunset / rise times using python based on the link provided below. My results done through excel and python do not match the real values. Any ideas on what I could be doing wrong? My Excel sheet can be found under .. http://transpotools.com/sun_time.xls # Created on… >>> More
Android-Java: Constructing a triangle based on Coordinates on a map and your bearing

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi Guys, I'm constructing a geolocation based application and I'm trying to figure out a way to make my application realise when a user is facing the direction of the given location (a particular long / lat co-ord). I've got the math figured, I just have the triangle to construct. //UPDATE So… >>> More
Math.max and Math.min outputting highest and lowest values allowed

as seen on Stack Overflow - Search for 'Stack Overflow'
so I'm trying to make a program that will output the sum, average, and smallest and largest values. I have everything basically figured out except the smallest and largest values are outputting 2147483647 and -2147483647, which I believe are the absolute smallest and largest values that Java will… >>> More
Is Programming == Math?

as seen on Stack Overflow - Search for 'Stack Overflow'
I've heard many times that all programming is really a subset of math. Some suggest that OO, at its roots, is mathematically based. I don't get the connection. Aside from some obvious examples: using induction to prove a recursive algorithm formal correctness proofs functional languages lambda calculus asymptotic… >>> More