source: trunk/tools/database/gd/mathmake.c

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

#define scale 1024

int basis[91];
int cost[360];

main(void) {
        int i;
        printf("#define costScale %d\n", scale);
        printf("int cost[] = {\n  ");
        for (i=0; (i <= 90); i++) {
                basis[i] = cos((double)i * .0174532925) * scale;
        }
        for (i=0; (i < 90); i++) {
                printf("%d,\n  ", cost[i] = basis[i]);
        }
        for (i=90; (i < 180); i++) {
                printf("%d,\n  ", cost[i] = -basis[180-i]);
        }
        for (i=180; (i < 270); i++) {
                printf("%d,\n  ", cost[i] = -basis[i-180]);
        }
        for (i=270; (i < 359); i++) {
                printf("%d,\n  ", cost[i] = basis[360-i]);
        }
        printf("%d\n", cost[359] = basis[1]);
        printf("};\n");
        printf("#define sintScale %d\n", scale);
        printf("int sint[] = {\n  ");
        for (i=0; (i<360); i++) {
                int val;
                val = cost[(i + 270) % 360];
                if (i != 359) {
                        printf("%d,\n  ", val);
                } else {
                        printf("%d\n", val);
                }
        }
        printf("};\n");
}