Function graphene_sys::graphene_triangle_init_from_vec3

pub unsafe extern "C" fn graphene_triangle_init_from_vec3(
    t: *mut graphene_triangle_t, 
    a: *const graphene_vec3_t, 
    b: *const graphene_vec3_t, 
    c: *const graphene_vec3_t
) -> *mut graphene_triangle_t