Allocates a new #graphene_vec3_t structure.
Get the GType of Vec3
Provides a constant pointer to a vector with three components, all sets to 1.
Provides a constant pointer to a vector with three components with values set to (1, 0, 0).
Provides a constant pointer to a vector with three components with values set to (0, 1, 0).
Provides a constant pointer to a vector with three components with values set to (0, 0, 1).
Provides a constant pointer to a vector with three components, all sets to 0.