Hi, I build a model in electrostatics, AC/DC model. I define a angle named 'thita' in global definition which equals to atan(r/z) of the geometry. Now i have simulated the potential of geometry, and i want to calculate the dipole moment by using line integration. the expression of integration part includes the extention of potential I modelled and angle I defined. the expression is like Vsin(thita). My problem is, when I choose the line of what I want to integrate, what is the integration variable of the function(...dx, what x is). The equation I want to calculate is ∫Vsin(thita) d(thita). How can I set the thita as the integration variable
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