Efficient triangular shaped meshes

A method for transmitting display information, comprising:

• subdividing a triangular shape of display information into triangle primitives, wherein each triangle primitive has at least one lower vertex and at least one upper vertex;
• defining unique mesh vertices that represent the triangle primitives, wherein each unique mesh vertex is a vertex of at least one triangle primitive;
• transmitting unique mesh vertices, wherein each unique mesh vertex is only transmitted once, wherein the step of transmitting further comprises:
• (a) transmitting and caching lower unique mesh vertices and upper unique mesh vertices of a first row of triangle primitives;
• (b) overwriting lower unique mesh vertices of a next row of triangle primitives with the upper unique mesh vertices of the first row of triangle primitives;
• (c) transmitting and caching upper unique mesh vertices of the next row of triangle primitives;
• (d) repeating steps (b)–(c) as necessary;
• and rendering a triangular mesh from the plurality of triangle primitives.

A computer program product for employing video information associated with a triangular mesh, the computer program product having a medium with a computer program embodied thereon, the computer program comprising:

• (a) computer code for deriving a plurality of adjacent triangle primitives of a first row of triangle primitives and at least a next row of triangle primitives, wherein each triangle primitive comprises at least one lower vertex and at least one upper vertex;
• (b) computer code for defining unique mesh vertices that are required to construct the triangular mesh, wherein each unique mesh vertex represents a vertex of one or more triangle primitives;
• (c) computer code for caching lower unique mesh vertices and upper unique mesh vertices of the first row of triangle primitives, wherein each unique mesh vertex is only represented once;
• (d) computer code for overwriting lower unique mesh vertices of the next row of triangle primitives with the upper unique mesh vertices of the first row of triangle primitives;
• (e) computer code for caching upper unique mesh vertices of triangle primitives;
• and
• (f) repeating steps (d)–(e) as necessary, thereby generating a triangular mesh.

A method for employing video information associated with a triangular mesh, comprising:

• deriving a plurality of contiguous triangle primitives from the video information, wherein each triangle primitive comprises two lower and one upper vertices or two upper and one lower vertices;
• for each contiguous triangle primitive in a first row (r=1) of triangle primitives, wherein the first row is an outer row of the triangular mesh, caching both the upper and lower vertices;
• for each contiguous triangle primitive in a second row or y row, where y=r+1, of triangle primitives adjacent to the first row or r row, caching only the vertices that do not overlap the vertices in the first row or r row and overwriting the overlapping vertices of the second row or y row with the overlapping vertices of the first row or r row, such that each vertex in the second row or y row is cached only once;
• add 1 to r;
• and
• for each y row, repeating the above two steps until no more rows exists, thereby creating the triangular mesh.