Constructor
CoglAttributenew_const_3f
Declaration [src]
CoglAttribute*
cogl_attribute_new_const_3f (
CoglContext* context,
const char* name,
float component0,
float component1,
float component2
)
Description [src]
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 (component0
, component1
, component2
) 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.
Parameters
context
-
Type:
CoglContext
A
CoglContext
.The data is owned by the caller of the function. name
-
Type:
const char*
The name of the attribute (used to reference it from GLSL)
The data is owned by the caller of the function. The value is a NUL terminated UTF-8 string. component0
-
Type:
float
The first component of a 3 component vector.
component1
-
Type:
float
The second component of a 3 component vector.
component2
-
Type:
float
The third component of a 3 component vector.
Return value
Type: CoglAttribute
A newly allocated CoglAttribute
representing the given constant vector.
The caller of the function takes ownership of the data, and is responsible for freeing it. |