Creates a new, 3 component, attribute whose value remains constant across all the vertices of a primitive without needing to duplicate the value for each vertex.
The constants (value[0], value[1], value[2]) represent a 3 component float vector which should have a corresponding declaration in GLSL code like:
[| attribute vec3 name; |]
unless the built in name "cogl_normal_in" is being used where no explicit GLSL declaration need be made.
| context |
A Context |
| name |
The name of the attribute (used to reference it from GLSL) |
| value |
A pointer to a 3 component float vector |
|
A newly allocated Attribute representing the given constant vector. |