rot 3d
Rotates a 3d coordinate by an angle theta.
Inlets
frac32 angle of rotation (64 = 2pi)
frac32buffer x
frac32buffer y
frac32buffer z
Outlets
frac32buffer x
frac32buffer y
frac32buffer z
Parameters
frac32.s.map angle of rotation (64 = 2pi)
Attributes
combo rotation axis
void rotate(int32_t x, int32_t y, int32_t z, int32_t costheta, int32_t sintheta,
int32_t *x_out, int32_t *y_out, int32_t *z_out) {
#if (attr_axis == 0) // rotation around x
*x_out = x;
*y_out = ___SMMLA(y, costheta, ___SMMUL(z, -sintheta)) << 1;
*z_out = ___SMMLA(y, sintheta, ___SMMUL(z, costheta)) << 1;
#elif (attr_axis == 1) // rotation around y
*x_out = ___SMMLA(x, costheta, ___SMMUL(z, sintheta)) << 1;
*y_out = y;
*z_out = ___SMMLA(x, -sintheta, ___SMMUL(z, costheta)) << 1;
#elif (attr_axis == 2) // rotation around z
*x_out = ___SMMLA(x, costheta, ___SMMUL(y, -sintheta)) << 1;
*y_out = ___SMMLA(x, sintheta, ___SMMUL(y, costheta)) << 1;
*z_out = z;
#endif
}int32_t costheta;
int32_t sintheta;
SINE2TINTERP((inlet_theta + param_theta << 5) + (1 << 30), costheta);
SINE2TINTERP((inlet_theta + param_theta << 5), sintheta);rotate(inlet_x, inlet_y, inlet_z, costheta, sintheta, &outlet_x, &outlet_y,
&outlet_z);