/*
 *  JoeyLib 3D
 *  Copyright (C) 2019 Scott Duensing <scott@kangaroopunch.com>
 *
 *  This software is provided 'as-is', without any express or implied
 *  warranty.  In no event will the authors be held liable for any damages
 *  arising from the use of this software.
 *
 *  Permission is granted to anyone to use this software for any purpose,
 *  including commercial applications, and to alter it and redistribute it
 *  freely, subject to the following restrictions:
 *
 *  1. The origin of this software must not be misrepresented; you must not
 *     claim that you wrote the original software. If you use this software
 *     in a product, an acknowledgment in the product documentation would be
 *     appreciated but is not required.
 *  2. Altered source versions must be plainly marked as such, and must not be
 *     misrepresented as being the original software.
 *  3. This notice may not be removed or altered from any source distribution.
*/


#include <stdio.h>
#include <math.h>


#define J3D_M_PI  3.1415926


int main(void) {
	int    pass;
	int    count;
	int    euler;
	float  radian;
	FILE  *out;

	out = fopen("j3dtbls.h", "wt");
	if (!out) {
		printf("Unable to create output file!\n");
		return 1;
	}

	fprintf(out, \
		"/*\n" \
		" *  JoeyLib 3D\n" \
		" *  Copyright (C) 2019 Scott Duensing <scott@kangaroopunch.com>\n" \
		" *\n" \
		" *  This software is provided 'as-is', without any express or implied\n" \
		" *  warranty.  In no event will the authors be held liable for any damages\n" \
		" *  arising from the use of this software.\n" \
		" *\n" \
		" *  Permission is granted to anyone to use this software for any purpose,\n" \
		" *  including commercial applications, and to alter it and redistribute it\n" \
		" *  freely, subject to the following restrictions:\n" \
		" *\n" \
		" *  1. The origin of this software must not be misrepresented; you must not\n" \
		" *     claim that you wrote the original software. If you use this software\n" \
		" *     in a product, an acknowledgment in the product documentation would be\n" \
		" *     appreciated but is not required.\n" \
		" *  2. Altered source versions must be plainly marked as such, and must not be\n" \
		" *     misrepresented as being the original software.\n" \
		" *  3. This notice may not be removed or altered from any source distribution.\n" \
		"*/\n\n\n" \
		"#ifndef H_J3DTBLS_\n" \
		"#define H_J3DTBLS_\n\n\nstatic float sin_table[] = {\n\t" \
	);

	// Build look-up tables for speed later
	for (pass=0; pass<2; pass++) {
		count = 0;
		for (euler=0; euler<361; euler++) {
			radian = ((float)J3D_M_PI * (float)euler / (float)180);
			if (euler != 0) {
				fprintf(out, ", ");
			}
			if (count > 5) {
				count = 0;
				fprintf(out, "\n\t");
			}
			fprintf(out, "%10.7f", pass == 0 ? sin((double)radian) : cos((double)radian));
			count++;
		}
		fprintf(out, "\n};\n\n");
		if (pass == 0) {
			fprintf(out, "static float cos_table[] = {\n\t");
		}
	}

	fprintf(out, "\n#endif  // H_J3DTBLS_\n");

	fclose(out);

	return 0;
}