This example shows how to build surface by approximating areas with constant real numbers and how to add inequalities on resulting surface using areas. In this example 6 different areas were used. This example looks like area.tcl example, but one area (area6) with inequality was added.
Here is the image of the resulting surface (green colour for areas 1,3 and 5, red colour for areas 2 and 4, magenta for area 6):
Pic 1. Surface built from areas using inequalities
This result was obtained with "examples/surfit/curvs/area_ineq.tcl"
script.
surfit: gridding and contouring software.