*** Resolved *** Plot Ellipse

[DSERKEZ]

According to the picture, I'd like to have the code to plot point "P" , (X,Y), coordinates.

Thanks in advance.

Regards

DSerkez

[twanvl]

If C is at (0,0), then the condition:
x²/a² + y²/b² = 1
will be true for all points on the ellipse.
So for a given x:
y²/b² = 1 - x²/a²
y² = (1 - x²/a²) * b²
y = +/- sqrt((1 - x²/a²) * b²)

where +/- means that y can have two values, +... and -...., and sqrt is the square root (?^0.5)

You could also calculate the ellipse based on:
r₁ + r₂ = 2(a-c) + 2c = 2a

[DSERKEZ]

Hi and thank you for the reply.

But what I am trying to do is to move point "P" around the ellipse and connecting two lines (F1,F2) to P while moving.

I tried some things but did not work.


Thanks again.

[NotLKH]

So, you mean something like this example progie, except for an ellipse, and not a sphere?

[DSERKEZ]

That's exactly what I needed.

Thank you Twanvl, thank you NotLKH.



Bye.