PK_MESH_facet_strip_t

struct PK_MESH_facet_strip_s
    {
    PK_LOGICAL_t        is_relative_index;      --- Indicates whether the
                                                --- 'strip_indices' are
                                                --- relative to this block.
    int                 n_vertex_positions;     --- Number of vertices in
                                                --- block.
    PK_VECTOR_t        *vertex_positions;       --- Positions of vertices
    PK_VECTOR1_t       *vertex_normals;         --- Normals of vertices
                                                --- (may be NULL).
    int                 n_strip_indices;        --- Number of indices
                                                --- in 'strip_indices'
                                                --- array
    int                *strip_indices;          --- Indices of vertices
                                                --- of strip.
    };
typedef struct PK_MESH_facet_strip_s PK_MESH_facet_strip_t;


This structure contains the data for a block of facets described as a
tri-strip.

Used in:

PK_MESH_facet_t

The tri-strip is a collection of facets described by an array of indices,
'strip_indices', such that, if the vertex_position array is {a,b,c,d,e},
then 'n_strip_indices' is 5 and 'strip_indices' is {0,1,2,3,4}. The facets
of the strip are {a,b,c},{c,b,d}, and {c,d,e}. See here for more
information.

Description of fields:


'is_relative_index'       Indicates whether the indices 'strip_indices' are
                          relative or absolute. When set to PK_LOGICAL_true,
                          it is not possible to define 'strip_indices' that
                          refer to 'vertex_positions' defined in previous
                          blocks. An absolute index is relative to the first
                          vertex added to the mesh in the first facet block
                          returned by the application callback function.


'n_vertex_positions'      The number of vertices in the array
                          'vertex_positions'. If 'vertex_normals' is not
                          NULL then it is also the number of vertex normals.


'vertex_positions'        The positions of the vertices of the mesh in this
                          block. There can be duplicates if the vertex has
                          multiple normals.


'vertex_normals'          If not NULL, the normals of the vertices of the
                          mesh in this block.


'n_strip_indices'         The number of strip indices in the array
                          'strip_indices'.


'strip_indices'           The indices of the vertices of the strip in the
                          'vertex_positions' array.