ADVENTURE_CAD (Ver. 0.11 beta) Manual 



1. Usage of advcad Command

Assuming you have a geometry file, *.gm3d, type, 

% advcad  <geometry file> <patch file> <PatchSize> [-pcm]

It reads a geometry patch file, *.gm3d, specified as <geometry file>.
<PatchSize> is a real number which specifies average triangle patch size.
It generates a surface patch file, *.pch or *.pcm, as specified by <patch file>.
If -pcm is designated, output surface patch is written in the pcm format.


2. Format of Geometry Files, *.gm3d

sheet  number_of_point  point0(x,y,z)  point1(x,y,z) ....

  Create a polygonal sheet primitive of <number_of_point> vertices.
  All the vertex points, <point0>, <point1>, ... must be on a 3-D plane.
  Push it on the stack.

circle  center_vector(x,y,z)  x_vector(x,y,z)  z_vector(x,y,z)  num_div
  
  Create a circle-like polygonal sheet primitive.
  Its center is <center_vector>.
  Its radius is the length of <x_vector>.
  It is placed on the coordinate system, whose X and Z vectors 
  are specified as <x_vector> and <z_vector>, respectively.
  The angle of each edge is  (360 / <num_div>).

extrude  vector(x,y,z)

  Pop 1 sheet object from the stack.
  Extrude it to the direction of <vector>, and create a new solid object.
  The length of <vector> is also used.
  Push it into the stack.

revolve  axis_point0(x,y,z)  axis_point1(x,y,z)  num_div

  Pop 1 sheet object from the stack.
  Revolve it around the specified axis., and create a new solid object.
  The rotation axis is along the line from <axis_point0> to <axis_point1>.
  The angle of each edge is  (360 / <num_div>).
  Push it into the stack.

box  origin_point(x,y,z)  extent_vector(x,y,z)

  Create a box solid primitive, from <origin_point>, 
  with its size as <extent_vector>.
  Push it on the stack.

(A)
(B)
add
  
  Pop 2 solid/sheet objects A and B from the stack.
  Evaluate A + B, union of A and B, and create a new solid/sheet object. 
  Push it on the stack.


(A)
(B)
subtract
  
  Pop 2 solid/sheet objects A and B from the stack.
  Evaluate A - B and create a new solid/sheet object. 
  Push it on the stack.