Re: [Flashcoders] How to solve SSS triangle?
Hi Ryanm,
Here is a function which I wrote a long time back. It calculates included
angle it uses cosine rule to calculate the angle.
The other function calculates shortest distance between two points.
function getAngle(vertex1,vertex2,vertex3){
var a = (measureLength(vertex2,vertex3));
var b = (measureLength(vertex3,vertex1));
var c = (measureLength(vertex1,vertex2));
var abc1 = (((a*a)+(c*c)-(b*b)) / (2*a*c));
var angle =(Math.round(Math.acos(abc1)*(180/Math.PI)));
return(angle);
}
function measureLength (obj1, obj2) {
var diffx = (obj2._x-obj1._x);
var diffy = (obj2._y-obj1._y);
return (Math.sqrt((diffx*diffx)+(diffy*diffy)));
}
Regards,
Rahul
- Original Message -
From: "ryanm" <[EMAIL PROTECTED]>
To: "Flashcoders mailing list"
Sent: Tuesday, November 22, 2005 4:30 PM
Subject: Re: [Flashcoders] How to solve SSS triangle?
> >I am having 3 movie Clips named point1_mc, point2_mc, point3_mc in the
> > stage. They are arranged in such a way to form a triangle...
> > Now how can i get those 3 angles and sides formed by these points.?
> >
> With a high school geometry textbook? ;-)
>
> Law of cosines: c^2 = a^2 + b^2 - 2ab*Cos(q)
> Where a, b, and c are the sides, and q is the angle opposite c
>
> ryanm
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Re: [Flashcoders] How to solve SSS triangle?
Thank u... :-P ryanm wrote: I am having 3 movie Clips named point1_mc, point2_mc, point3_mc in the stage. They are arranged in such a way to form a triangle... Now how can i get those 3 angles and sides formed by these points.? With a high school geometry textbook? ;-) Law of cosines: c^2 = a^2 + b^2 - 2ab*Cos(q) Where a, b, and c are the sides, and q is the angle opposite c ryanm ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders -- Hi Thanks and Regards, Peria Pandi. J Flash Programmer, +91 9886742392 Excel-Soft Technologies Pvt Ltd, 1-B,Hotagalli Industrial Area, Mysore - 570018 Karnataka. Love your Job. But dont fall in love with your Company ! ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
Re: [Flashcoders] How to solve SSS triangle?-Solution
Thank u Danny Kodicek...
and i am presenting the solution to solve SSS triangle...
/SOLVE TRIANGLE ///
///pass the instance names of there movieclips on the stage
//this function returns a Solution Object
//Solution object has:
//a-side1
//b-side2
//c-side3
//A-angle1
//B-angle2
//C-angle3
function solveTriangle(a_mc, b_mc, c_mc) {
a = distance(b_mc, c_mc);
b = distance(c_mc, a_mc);
c = distance(a_mc, b_mc);
//find Angle A
var A = (Math.pow(b, 2)+Math.pow(c, 2)-Math.pow(a, 2))/(2*b*c);
A = Degree(Math.acos(A));
//trace(A);
/find Angle B
var B = (Math.pow(a, 2)+Math.pow(c, 2)-Math.pow(b, 2))/(2*a*c);
B = Degree(Math.acos(B));
//trace(B);
var C = 180-(A+B);
//trace(C);
A = Math.round(A);
B = Math.round(B);
C = Math.round(C);
var solution = {a:a, b:b, c:c, A:A, B:B, C:C};
return solution;
}
function distance(p1, p2) {
//returns pixels
var dx = p2._x-p1._x;
var dy = p2._y-p1._y;
var dis = Math.pow(dx, 2)+Math.pow(dy, 2);
var dis = Math.sqrt(dis);
return dis;
}
function Degree(rad) {
return (180/Math.PI)*rad;
}
function Radian(deg) {
return (Math.PI/180)*deg;
}
end//
enjoy
-Pandian
Danny Kodicek wrote:
I am having 3 movie Clips named point1_mc, point2_mc, point3_mc in the
stage. They are arranged in such a way to form a triangle...
Now how can i get those 3 angles and sides formed by these points.?
Sides are given by the lengths of the vectors between the points (eg:
x = point1_mc._x - point2_mc._x, y = point1_mc._y - point2_mc._y, so
side length =sqrt(x*x + y*y) )
Once you have these sides, you can use the cosine rule to find the
angles: If you know the three sides a,b,c, the angle A between the
sides b and c is given by a*a = b*b + c*c - 2*b*c*cosA.
To get acos(A), you need to use atan(A): acos(A)=atan(A/sqrt(1 - A*A))
Best
Danny
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Re: [Flashcoders] How to solve SSS triangle?
I am having 3 movie Clips named point1_mc, point2_mc, point3_mc in the stage. They are arranged in such a way to form a triangle... Now how can i get those 3 angles and sides formed by these points.? With a high school geometry textbook? ;-) Law of cosines: c^2 = a^2 + b^2 - 2ab*Cos(q) Where a, b, and c are the sides, and q is the angle opposite c ryanm ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
Re: [Flashcoders] How to solve SSS triangle?
I am having 3 movie Clips named point1_mc, point2_mc, point3_mc in the stage. They are arranged in such a way to form a triangle... Now how can i get those 3 angles and sides formed by these points.? Sides are given by the lengths of the vectors between the points (eg: x = point1_mc._x - point2_mc._x, y = point1_mc._y - point2_mc._y, so side length =sqrt(x*x + y*y) ) Once you have these sides, you can use the cosine rule to find the angles: If you know the three sides a,b,c, the angle A between the sides b and c is given by a*a = b*b + c*c - 2*b*c*cosA. To get acos(A), you need to use atan(A): acos(A)=atan(A/sqrt(1 - A*A)) Best Danny ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
[Flashcoders] How to solve SSS triangle?
I am having 3 movie Clips named point1_mc, point2_mc, point3_mc in the stage. They are arranged in such a way to form a triangle... Now how can i get those 3 angles and sides formed by these points.? Thank u -Pandian ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
