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| Sub Math_CartesianToPolar | |
| ' Math | convert Cartesian coodinate to polar coordinate | |
| ' param x, y - Cartesian coordinate | |
| ' return r, a - polar coordinate (0<=a<360) | |
| r = Math.SquareRoot(x * x + y * y) | |
| If x = 0 And y > 0 Then | |
| a = 90 ' [degree] | |
| ElseIf x = 0 And y < 0 Then | |
| a = -90 | |
| ElseIf x = 0 And y = 0 Then |