What is the difference between P1 and P2 values used in my code

[vveeran]

Dear all,

I want to know the difference between the 2 values of P1 and P2

entered in my mathcad code.

I explained clearly in my code.

Could anyone help me to find out the difference ?

I attached the code below.

[Werner_E · Accepted solution]

No need to ask twice. The question was answered here -> Re: How to mark some points in 3D scatter plot