Methods and apparatus of encoding/decoding positions of points of a point cloud encompassed in a cuboid volume

A method of decoding, from a bitstream, positions of points of a point cloud encompassed in a cuboid volume, the positions being represented in a three-dimensional coordinate system, the method comprising:

• decoding, from the bitstream, vertex information defining at least two vertices located on edges of the cuboid volume;
• determining a point in the cuboid volume from the at least two vertices;
• and
• constructing at least one triangle from the at least two vertices and the determined point;
• positions of rendered points obtained by voxelization of the at least one triangle representing the positions of the points of the point cloud encompassed in the cuboid volume.

A non-transitory storage medium carrying instructions of program code for executing a method of encoding, into a bitstream, positions of points of a point cloud encompassed in a cuboid volume, the positions being represented in a three-dimensional coordinate system, at least two vertices being located on edges of the cuboid volume, the method comprising:

• encoding vertex information defining the at least two vertices into the bitstream;
• determining a point in the cuboid volume from the at least two vertices;
• and
• constructing at least one triangle from the at least two vertices and the determined point;
• positions of rendered points obtained by voxelization of the at least one triangle representing the positions of the points of the point cloud encompassed in the cuboid volume.