/*
 * Header Begins--Do not remove################################################
 *
 *	Driver that gets points interactively from the user's mouse and
 *	plots a spline through them until the user depresses the right-hand
 *	button.
 *
 *	(c) Eugene Fiume, University of Toronto, 1995.
 *
 *	You are permitted to use this code for noncommercial, educational
 *	purposes only.  This header must not be removed from this file.
 *
 * Header Ends--Do not remove##################################################
 */

#include <stdio.h>
#include "X.h"
#include "Spline.h"

main(argc, argv)
	int argc;
	char *argv[];
{
	int done = FALSE;
	int s,eval;
	RealPoint2D pt;

	printf("Interpolation Demonstration.\n\n");
	
	printf("Choose a cubic spline.\n");
	printf("	%d = Catmull-Rom\n",CubicCatmullRom);
	printf("	%d = B-Spline\n",CubicBSpline);
	printf("	%d = Bezier\n",CubicBezier);
	printf("	%d = Lagrange\n",CubicLagrange);

	done = FALSE;
	while (!done) {
		if (scanf("%d", &s) == EOF) exit(1);
		if ((s <= 0) || (s >= NumberOfSplines))
			fprintf(stderr, "Enter something reasonable, eh?\n");
		else
			done = TRUE;

	}
	SetUpSpline(s, 16, 0);

	printf("\nChoose an evaluation method.\n");
	printf("	%d = Direct matrix multiplication\n", DirectTM);
	printf("	%d = Premultiply to get coefficients\n",DirectMP);
	printf("	%d = Horner's rule (which implies 2)\n",Horner);
	printf("	%d = Forward differencing\n",ForwardDiff);
	printf("	%d = Table Lookup\n",TableLookup);

	done = FALSE;
	while (!done) {
		if (scanf("%d", &eval) == EOF) exit(1);
		if ((eval < 0) || (eval > Evaluations))
			fprintf(stderr, "Enter something reasonable, eh?\n");
		else
			done = TRUE;

	}

	SetEvaluation(eval);

	printf("\nDepress left mouse button at desired points.\n");
	printf("Stop execution by depressing right-hand button.\n\n");

	XOpen(500,500, argc, argv);

	done = FALSE;
	do {
		pt = GetMouseButtonPush();
		if (pt.x < 0.0)
			done = TRUE;
		else
			AddControlPoint(pt);
	} while (!done);
}