gwy_xyz_new()

GwyXYZ *
gwy_xyz_new (gdouble x,
             gdouble y,
             gdouble z);

Creates Cartesian coordinates in space.

This is mostly useful for language bindings.

gwy_xyz_copy()

GwyXYZ *
gwy_xyz_copy (const GwyXYZ *xyz);

Copies Cartesian coordinates in space.

gwy_xyz_free()

void
gwy_xyz_free (GwyXYZ *xyz);

Frees Cartesian coordinates in space created with gwy_xyz_copy().

gwy_xyz_len()

gdouble
gwy_xyz_len (const GwyXYZ *xyz);

Computes the length of a space vector.

gwy_xyz_len2()

gdouble
gwy_xyz_len2 (const GwyXYZ *xyz);

Computes the squared length of a space vector.

gwy_xyz_dotprod()

gdouble
gwy_xyz_dotprod (const GwyXYZ *xyz,
                 const GwyXYZ *other);

Computes the inner product of two space vectors.

gwy_xyz_crossprod()

void
gwy_xyz_crossprod (const GwyXYZ *xyz,
                   const GwyXYZ *other,
                   GwyXYZ *result);

Computes the cross-product of space vectors.

The result is filled with xyz ×other . It may be one of the two input vectors.

x

    gdouble x = xyz->y*other->z - xyz->z*other->y;

y

    gdouble y = xyz->z*other->x - xyz->x*other->z;

z

    gdouble z = xyz->x*other->y - xyz->y*other->x;