The Official M.C. Escher Website. Fluid Polygons and Polyhedra. Figure 1.
Figure 2. Figure 3. Height of the Tri. Pyramid and base radius. Geometry, Surfaces, Curves, Polyhedra. Notes on polygons and meshes Includes Surface (polygon) simplification, Clipping a polygonal facet with an arbitrary plane, Surface Relaxation and Smoothing of polygonal data, Mesh crumpling, splitting polygons, two sided facets, polygon types, tests for clockwise and concavity, clipping line to polygons, area of a 3D polygon, area of general polygons, determining inside/outside test, intersection of a line and a facet, Eulers numbers.
No amount of genius can overcome a preoccupation with detail. Law 8, Marion Levy Jr. Notes on points, lines and planes Includes calculations for the distance between points, lines and planes. GRAFICA Obscura. Grid Paper PDFs. Downloadable and very printable, I find these PDFs extremely useful.
Graph Paper Quick Picks Now set to: 8 1/2 x 11 Paper. Ruled in Inches. Now set to: A4 Paper, Ruled in Millimeters.