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.