pub unsafe extern "C" fn graphene_vec2_interpolate(
v1: *const graphene_vec2_t,
v2: *const graphene_vec2_t,
factor: c_double,
res: *mut graphene_vec2_t,
)
pub unsafe extern "C" fn graphene_vec2_interpolate(
v1: *const graphene_vec2_t,
v2: *const graphene_vec2_t,
factor: c_double,
res: *mut graphene_vec2_t,
)