Method for resolving priority between a calligraphically-displayed point feature and both raster-displayed faces and other calligraphically-displayed point features in a CIG system

A method for determining a proper occultation relationship between a calligraphic point feature and at least one of another calligraphic point feature and a potentially-raster-visible surface face in a raster portion of a display image frame, comprising the steps of:

• dividing the total image screen into an array of cells;
• determining which of the cells on the total screen lie inside each of the potentially-raster-visible faces and calligraphic point features which must be considered for the total image screen;
• ordering the distance of each of the potentially-raster-visible faces from a viewing point;
• ordering the distance of each of the calligraphic point features from the viewing point;
• and comparing the ordered distances of each calligraphic point feature to at least one of the potentially-raster-visible face distances and other calligraphic point features distances to determine which of the cells lying inside of each of the calligraphic point feature, the raster face or the other calligraphic point feature are occluded and which cells are visible.