A reconstruction of Centnerschwer's table of quarter-squares (1825)

This is an analysis and reconstruction of Centnerschwer's table of quarter-squares, which is compared to the main other published tables of quarter-squares

A reconstruction of Plassmann's table of quarter-squares (1933)

This is an analysis and reconstruction of Plassmann's table of quarter-squares, which is compared to the main other published tables of quarter-squares

Kulové plochy, hlavní kružnice a rovnoběžky

Translated from "Spheres, great circles and parallels", TUGboat, volume 30, number 1, 2009, pages 80-87)National audienceThis article (in Czech) explains how spheres can be drawn in metapost with a correct representation of great circles and parallels

The eroding rotation: Why digital pictures should not be rotated

This report examines the effect of repeated rotations on bitmaps and the gradual loss of accuracy of the images

A reconstruction of Charles Babbage's table of logarithms (1827)

This document is a reconstruction of Charles Babbage's table of logarithms published in 1827

The great logarithmic and trigonometric tables of the French Cadastre: a preliminary investigation

This document is a first investigation of the ''Tables du cadastre,'' Prony's effort to build the greatest monument of science of the French Revolution. The document is supplemented by 47 volumes which make it easier to analyze the original manuscripts

The METAOBJ tutorial and reference manual

Manuel technique.This manual describes METAOBJ, a system for high-level object-oriented drawing based on METAPOST.This manual describes METAOBJ, a system for high-level object-oriented drawing based on METAPOST

MP2GL: prototyping 3D objects with METAPOST and OpenGL

MetaPost was created with 2D graphics in mind, and in spite of various extensions added during the last few years, it doesn't seem well adapted for 3D technical graphics. However, there are cases where simple but realistic 3D graphics are needed, for instance for inclusion in an article, and there are also cases where 3D objects are mere 2D objects with added depth. In such cases, an approach combining MetaPost with an OpenGL environment proves very useful and allows for interesting applications, in particular the prototyping of 3D objects for use independently from MetaPost. Such an approach is also a smooth way to get introduced to OpenGL. MP2GL is our first attempt towards this direction

Napier's bones and Genaille-Lucas's rods

This note presents a survey of Napier's bones and of their more " automatic " evolution, the Genaille-Lucas rods. Generalizations of both to other bases are also shown