quakeforge/libs/util/test/test-quat.c

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#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "QF/mathlib.h"
//PITCH YAW ROLL
static vec3_t test_angles[] = {
{0, 0, 0},
{45, 0, 0},
{0, 45, 0},
{0, 0, 45},
{45, 45, 0},
{0, 45, 45},
{45, 0, 45},
{45, 45, 45},
};
#define num_angle_tests (sizeof (test_angles) / sizeof (test_angles[0]))
// return true if a and b are close enough (yay, floats)
static int
compare (vec_t a, vec_t b)
{
vec_t diff = a - b;
return diff * diff < 0.001;
}
static int
test_rotation (const vec3_t angles)
{
int i;
vec3_t forward, right, up;
quat_t quat, f, r, u, t;
quat_t qf = {0, 1, 0, 0};
quat_t qr = {0, 0, -1, 0};
quat_t qu = {0, 0, 0, 1};
AngleVectors (angles, forward, right, up);
AngleQuat (angles, quat);
// rotate forward vector
QuatConj (quat, t);
QuatMult (qf, t, t);
QuatMult (quat, t, f);
// rotate right vector
QuatConj (quat, t);
QuatMult (qr, t, t);
QuatMult (quat, t, r);
// rotate up vector
QuatConj (quat, t);
QuatMult (qu, t, t);
QuatMult (quat, t, u);
if (!compare (f[0], 0))
goto fail;
for (i = 0; i < 3; i++)
if (!compare (forward[i], f[i + 1]))
goto fail;
if (!compare (r[0], 0))
goto fail;
for (i = 0; i < 3; i++)
if (!compare (right[i], r[i + 1]))
goto fail;
if (!compare (u[0], 0))
goto fail;
for (i = 0; i < 3; i++)
if (!compare (up[i], u[i + 1]))
goto fail;
return 1;
fail:
printf ("\n\n%g %g %g\n\n", angles[0], angles[1], angles[2]);
printf ("%g %g %g\n", forward[0], forward[1], forward[2]);
printf ("%g %g %g\n", right[0], right[1], right[2]);
printf ("%g %g %g\n\n", up[0], up[1], up[2]);
printf ("%g %g %g %g\n", f[0], f[1], f[2], f[3]);
printf ("%g %g %g %g\n", r[0], r[1], r[2], r[3]);
printf ("%g %g %g %g\n", u[0], u[1], u[2], u[3]);
return 0;
}
int
main (int argc, const char **argv)
{
int res = 0;
size_t i;
for (i = 0; i < num_angle_tests; i ++) {
if (!test_rotation (test_angles[i]))
res = 1;
}
return res;
}