Method
CoglPrimitiveset_indices
Declaration [src]
void
cogl_primitive_set_indices (
CoglPrimitive* primitive,
CoglIndices* indices,
int n_indices
)
Description [src]
Associates a sequence of CoglIndices with the given primitive.
CoglIndices provide a way to virtualize your real vertex data by
providing a sequence of indices that index into your real vertex
data. The GPU will walk though the index values to indirectly
lookup the data for each vertex instead of sequentially walking
through the data directly. This lets you save memory by indexing
shared data multiple times instead of duplicating the data.
The value passed as n_indices will simply update the
CoglPrimitive n_vertices property as if
cogl_primitive_set_n_vertices() were called. This property defines
the number of vertices to draw or, put another way, how many
indices should be read from indices when drawing.
The CoglPrimitive first_vertex property
also affects drawing with indices by defining the first entry of the
indices to start drawing from.