Constructor
CoglAttributenew_const_4fv
Declaration [src]
CoglAttribute*
cogl_attribute_new_const_4fv (
CoglContext* context,
const char* name,
const float* value
)
Description [src]
Creates a new, 4 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], value[3]) represent a 4 component float vector which should have a corresponding declaration in GLSL code like:
[| attribute vec4 name; |]
unless one of the built in names “cogl_color_in”, “cogl_tex_coord0_in or “cogl_tex_coord1_in” etc is being used where no explicit GLSL declaration need be made.
Parameters
context-
Type:
CoglContextA
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. value-
Type:
const float*A pointer to a 4 component float vector.
The data is owned by the caller of the function.
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. |