cordic-printable.c

#include <stdio.h>

int main(){
	/*
	 * First dimension is step number, second dimension is row contains
	 * individual data from that element.
	 * 
	 * Element 0 is the angle in degrees
	 * Element 1 is the sine value
	 * Element 2 is the cosine value
	 */
	double steps[25][3] = {{45.000000000000000, 0.707106781186547, 
		0.707106781186548}, {22.500000000000000, 0.382683432365090, 
		0.923879532511287}, {11.250000000000000, 0.195090322016128, 
		0.980785280403230}, {5.625000000000000, 0.098017140329561, 
		0.995184726672197}, {2.812500000000000, 0.049067674327418, 
		0.998795456205172}, {1.406250000000000, 0.024541228522912, 
		0.999698818696204}, {0.703125000000000, 0.012271538285720, 
		0.999924701839145}, {0.351562500000000, 0.006135884649154, 
		0.999981175282601}, {0.175781250000000, 0.003067956762966, 
		0.999995293809576}, {0.087890625000000, 0.001533980186285, 
		0.999998823451702}, {0.043945312500000, 0.000766990318743, 
		0.999999705862882}, {0.021972656250000, 0.000383495187571, 
		0.999999926465718}, {0.010986328125000, 0.000191747597311, 
		0.999999981616429}, {0.005493164062500, 0.000095873799096, 
		0.999999995404107}, {0.002746582031250, 0.000047936899603, 
		0.999999998851027}, {0.001373291015625, 0.000023968449808, 
		0.999999999712757}, {0.000686645507812, 0.000011984224905, 
		0.999999999928189}, {0.000343322753906, 0.000005992112453, 
		0.999999999982047}, {0.000171661376953, 0.000002996056226, 
		0.999999999995512}, {0.000085830688477, 0.000001498028113, 
		0.999999999998878}, {0.000042915344238, 0.000000749014057, 
		0.999999999999719}, {0.000021457672119, 0.000000374507028, 
		0.999999999999930}, {0.000010728836060, 0.000000187253514, 
		0.999999999999982}, {0.000005364418030, 0.000000093626757, 
		0.999999999999996}, {0.000002682209015, 0.000000046813379, 
		0.999999999999999},}; 
	double target = 0, currentangle = 0, vector[2] = {1,0};
	/*
	 * for vector, Element 0 is x portion, Element 1 is y portion
	 */

	printf(">> ");
	scanf("%lf", &target);

	for(int i = 0; i < 25; i++){
		if(currentangle < target){
			currentangle += steps[i][0];
			printf("%.15lf hey!\n",currentangle);
		}
		else if (currentangle > target){
			currentangle -= steps[i][0];
			printf("%.15lf ho!\n",currentangle);
		}
	}
	printf("%lf\n",currentangle);
	// printf("%lf, %lf, %lf\n", steps[0][0], steps[0][1], steps[0][2]);
	return 0;
}