The Ddiin Exlicon drawing tool combines a compass, protractor, ruler, golden ratio tool, curved ruler and hexagon and pentagram and the lip stencils all in one device. From accurate ellipses to ...

An ingenious instrument for drawing ellipses and hyperbolas has recently been invented which is so arranged that if a pen be used it will keep the latter at all times tangent to the curve.

Unlike the elliptic trammel, only half an ellipse can be drawn with this device, making it a semi-elliptic trammel. It can be turned 180 degrees to draw the other half of the ellipse. Although this ...

This article was originally published with the title “Drawing an Ellipse with Compasses” inSA Supplements Vol. 68 No. 1752supp(July 1909), p. 67doi:10.1038/scientificamerican07311909-67supp ...

this is probably pretty silly but i can't prove to myself that the intuition is 100% correct...given a semimajor and semiminor axis, i need to draw ellipses in opengl. i thought the easiest way to ...