whats new ¦  programming tips ¦  indy articles ¦  intraweb articles ¦  informations ¦  links ¦  interviews
 misc ¦  tutorials ¦  Add&Win Game

Tips (1541)

Database (90)
Files (137)
Forms (107)
Graphic (114)
IDE (21)
Indy (5)
Internet / LAN (130)
IntraWeb (0)
Math (76)
Misc (126)
Multimedia (45)
Objects/
ActiveX (51)

OpenTools API (3)
Printing (35)
Strings (83)
System (266)
VCL (242)

Top15

Tips sort by
component


Search Tip

Add new Tip

Add&Win Game

Advertising

58 Visitors Online


 
...Determine if 3 points are collinear in 2D?
Autor: Arash Partow
Homepage: http://www.partow.net
[ Print tip ]  

Tip Rating (15):  
     


function Collinear(x1, y1, x2, y2, x3, y3: Double): Boolean;
begin
  
Result := (((x2 - x1) * (y3 - y1) - (x3 - x1) * (y2 - y1)) = 0);
end;
(* End Of Collinear *)

// vérifier si 3 points appartiennent à une même droite bidimensionnelle
// c.a.d s'ils sont alignés.


 

Rate this tip:

poor
very good


Copyright © by SwissDelphiCenter.ch
All trademarks are the sole property of their respective owners