Hi, I am wondering if there is a better way to my problem as the solution I found seems not optimal.
Looking at the picture, I need to know the 3d position of E and F.
Here's what I do know:
B is my camera position.
A and D are known and moving in world space, so I also know AB and AD.
I also know the radius of each spheres.
Here the solution I found:
I compute angle alpha knowing AB and AC.
Then I compute the angle BAD with the dot product of the two vector... This is the part I'm not sure as it is suppose to give me the cos of BAD I hope.
Then I compute CAE doing the difference between BAD and alpha.
Then knowing CAE I can compute the hypothenuse AE.
Repeat the operation for the second sphere and I finally get F.
Any better, clever way ?
Thanks to all you maths guys.