page_title: CaRMetal
section_title: 3D
hierarchical_section_title: CaRMetal / Special features / 3D
caption_attribution_description: Deutsch: Dodekaeder in Pseudo-3D. Erstellt mit der Software CaRMetal. English: Dodecahedron in pseudo 3D. Made with the software CaRMetal. Français&#160;: Un dodécaèdre dans un repère de l'espace. Un dodécaèdre sous CaRMetal.
context_page_description: CaRMetal is an interactive geometry program which inherited the C.a.R. engine. The software has been created by Eric Hakenholz, in Java. CaRMetal is free, under GNU GPL license. It keeps an amount of functionality of C.a.R. but uses a different graphical interface which purportedly eliminates some intermediate dialogs and provides direct access to numerous effects. Constructions are done using a main palette, which contains some useful construction shortcuts in addition to the standard compass and ruler tools. These include perpendicular bisector, circle through three points, circumcircular arc through three points, and conic section through five points. Also interesting are the loci, functions, parametric curves, and implicit plots. Element thickness, color, label, and other attributes can be set using a separate panel.
  CaRMetal also supports a configurable restricted construction palette and has assignment capabilities, which use an apparently unique feature called Monkey. CaRMetal has a scripting language which allows the user to build rather complex figures like fractals.
context_section_description: CaRMetal allows the user to set some properties of the objects, like their color or the fact that they are visible or not, as conditional. Also each object can have a layer number. An important application of these features was the 2.5D mode of CaRMetal, emulating 3D geometry. Since the version 4.0 CaRMetal has a real 3D mode which comes up with a regular tetrahedron, a cube, a diamond and a regular dodecahedron. It is also possible to bind a point to the inside of a (3D) circle or polygon. This feature, inherited from C.a.R., is based on barycentric coordinates. Since the 4.1 version CaRMetal permits some turtle graphics (programmed in JavaScript) either in 2D or in 3D.
caption: a dodecahedron can be turned with the mouse
exif: {}