////////////////////////////////////////////////////////////////
//
// 3Dcurve.h - extenal declaration for 3Dcurve model
// 
// Author: Mike Chantler
// Date:   29/04/2008
//
////////////////////////////////////////////////////////////////

extern void draw3Dcurve(double depth, double r1, double r2, double theta_start, double theta_stop, double theta_inc);
	// Function to draw 3D curve 
	// depth = depth centred round z=0
	// r1 = inner radius
	// r2 = outer radius
	// theta_start = start angle in degrees measured from x-axis
	// theta_stop = similar 
