Editing Povray

This article provides knowledge about different types of geometric primitive objects that can be exported from BRL-CAD to POV-Ray geometry file. Their properties, functions used for them, parameters are discussed in section below.

To Know more about POV-Ray, here are some links below:
* [http://www.povray.org/documentation/3.7.0/t2_1.html#t2_1_3 Introduction to POV-Ray]
* [http://www.povray.org/documentation/3.7.0/t2_2.html#t2_2_1_2 Adding Standard include files, Camera, Light source in POV-Ray Geometry file]

Below is the list of primitives that are working/exported correctly, partially and not touched yet.

= Primitives that are working properly = 
= Arbitrary convex polyhedra =
== ARB8 ==
This primitive is formed in POV-Ray using mesh.The mesh object can be used to efficiently store large numbers of triangles.
Example:
     mesh{triangle{a,b,c}triangle{a,c,d}triangle{a,d,f}
     triangle{g,h,c}triangle{e,f,g}triangle{e,g,h}}

== ARBN ==
An arbn record is specified by N sets of intersecting planes, each defined by four coefficients:

* the {X, Y, Z} coefficients of the plane's normal vector pointing outward from the center of the arbn shape, and
*the perpendicular distance of that plane from the origin.
Its exported in POV-Ray by using intersection of Planes.
Example:
     intersection{ plane{<x, y, z coefficients>, normal} .... }


= Ellipsoids =
== ELL ==
This primitive is named as spheroid in POV-Ray. It is having
Center Vector, Radius Vector
Example:
      Spheroid(<-1.50,3.00,-2.00>,<2.0,1.2,2.5> )

== ELLG, ELL1 ==
These primitives are exported under Ell

== EHY ==
Elliptical Hyperboloid of BRL-CAD can be formed by POV-Ray.
Currently its coordinates are exported successfully and is done by using quadric equartions of POV-Ray

== EPA ==
Elliptical Paraboloid in BRL-CAD. Its coordinates are exported successfully and is done by using quadric equartions of POV-Ray

== Sphere ==
Sphere is formed by
Center and Radius
Example:
      sphere { Center, Radius [OBJECT_MODIFIERS...]}


= Cones and Cylinders =
== Truncated General Cone ==
This primitive of BRL-CAD is formed by using Supercone of POV-Ray. 
Example:
     Supercone( //point A, axis Ax, axis Az:<0.0,0.0,0.0>, 0.5, 1.0,
                // point B, axis Bx, axis Bz:<0.0,1.5,0.0>, 0.7, 0.4)}

== Cone ==
This primitive of BRL-CAD is named as Cone in POV-Ray. It is formed as 
Center and radius of one end
Center and radius of other end
Example:
      cone {<0, 1, 0>, 0.3  <1, 2, 3>, 1.0 texture { T_Stone25 scale 4 }}

== TEC ==
Its also exported under TGC.

== REC ==
Its exported nuder TGC.

== TRC ==
Its also under TGC

== Cylender ==
This is formed by Cylender of POV-Ray.
center_of_one_end, center_of_other_end and Radius
Example:
      cylinder { <0, 1, 0>,<1, 2, 3>,0.5 }}

= Other Solids =
== Torus ==
Torus is created using
major radius and minor radius
Example:
     torus { 4, 1 pigment { Green }}

== Particle ==
This primitives of BRL-CAD is formed in POV-Ray by using Round_Cone2 of POV-Ray.
Example:
     Round_Cone2(
     //point A, radius A: <0,0,0>,0.70,
     // point B, radius B:<0,1,0>, 0.40,)


== half ==
Half primitive of BRL-CAD is export into POV-Ray as Plane.
Example:
      plane { <Normal>, Distance }




= Primitives that are under progress =
== ETO ==
Elliptical torus of BRL-CAD can be formed by using some methods. One of them is by using function i.e. f_torus
Example:
      f_torus(x,y,z,1*(y+0.4),0.1 )


== RHC ==
Right Hyperbolic Cylinder in BRL-CAD. Coordinates are exported successfully. It can be formed by using function
      function { pow(x,2) + y }
of POV-Ray but its not working well. Its under discussion with POV-Ray community

== RPC ==
Right Parabolic Cylinder in BRL-CAD. Coordinates are exported successfully. It also formed by the using functions of POV-Ray but under work.

= Primitives that are not under work yet =

== derived from 2d ==

=== extrude ===
=== revolve ===
=== dsp ===
=== ebm ===
=== hf ===

== Other solids ==

=== pipe === 
=== ars ===
=== metaball ===
=== nurb ===
=== spline ===
=== vol ===
=== bot ===
=== poly ===
=== hrt ===

== Other ==

=== Sketch ===
=== grip ===
=== binunif ===
=== submodel ===