SYNOPSIS

TDPACK (which stands for "Three Dimensional PACKage") is a collection of routines for projecting objects from a 3-dimensional coordinate system having U, V, and W axes to a 2-dimensional projection plane having X and Y axes and/or for drawing the projections of those objects. This can be referred to somewhat loosely as "drawing objects in three dimensions".

Tdpack consists of the following routines:

Initialization Routines:

TDINIT -

Define eye position, line of sight, up direction, and stereo flag.

TDPARA -

Define the reference parallelogram.

TDCLRS -

Define colors for TDPACK.

Parameter-Access Routines:

TDGETI -

Get the integer value of an internal parameter.

TDGETR -

Get the real value of an internal parameter.

TDGTRS -

Get the definition of a specified rendering style.

TDSETI -

Set the integer value of an internal parameter.

TDSETR -

Set the real value of an internal parameter.

TDSTRS -

Define a specified rendering style.

Point-Transforming Routines:

TDPRPT -

Project from 3-space to the projection plane.

TDPRPA -

Project from 3-space to the plane of the reference parallelogram.

TDPRPI -

Project from the plane of the reference parallelogram to 3-space.

Line-Drawing Routines:

TDLINE -

Draw the projection of a line in 3-space.

TDLNPA -

Draw the projection of a line in the plane of the reference parallelogram.

Grid-Drawing Routines:

TDGRDS -

Draw the grids on all the faces of a box in 3-space.

TDGRID -

Draw the grid on a particular face of a box in 3-space.

Label-Drawing Routines:

TDLBLS -

Draw labels for all faces of a box in 3-space.

TDLBLA -

Draw labels for a particular face of a box in 3-space.

TDPLCH -

Draw characters in the plane of the reference parallelogram.

Surface-Drawing Routines:

TDDTRI -

Draw triangles defined by a triangle list.

TDSTRI -

Add triangles defining a simple surface to a triangle list.

TDITRI -

Add triangles defining an isosurface to a triangle list.

TDMTRI -

Add triangles defining a 3D marker to a triangle list.

TDCTRI -

Order the triangles in a triangle list for proper rendering.

TDSORT -

Cut triangles with a plane perpendicular to one of the axes.

TDOTRI -

Generic sorting routine

C-BINDING SYNOPSIS

#include <ncarg/ncargC.h>

c_tdinit
c_tdpara
c_tdclrs
c_tdgeti
c_tdgetr
c_tdgtrs
c_tdseti
c_tdsetr
c_tdstrs
c_tdprpt
c_tdprpa
c_tdprpi
c_tdline
c_tdlnpa
c_tdgrds
c_tdgrid
c_tdlbls
c_tdlbla
c_tdplch
c_tddtri
c_tdstri
c_tditri
c_tdmtri
c_tdotri
c_tdctri
c_tdsort

ACCESS

To use Tdpack, load the NCAR Graphics libraries ncarg, ncarg_gks, and ncarg_c, preferably in that order.

MESSAGES

When error conditions are detected, the support routine SETER is called. By default, SETER writes a message to the standard error file (as defined by I1MACH(4)) and then terminates execution. It is possible to put SETER into recovery mode and regain control after a recoverable error (which includes all of the possible errors).

The possible error messages are listed below. All errors are recoverable in the sense that a user program which has called ENTSR to set recovery mode will get control back after one of these errors occurs.

TDGETI - UNCLEARED PRIOR ERROR
TDGETR - UNCLEARED PRIOR ERROR
TDGETR - UNRECOGNIZED PARAMETER NAME
TDINIT - UNCLEARED PRIOR ERROR
TDPARA - UNCLEARED PRIOR ERROR
TDPRPA - UNCLEARED PRIOR ERROR
TDPRPI - UNCLEARED PRIOR ERROR
TDPRPT - UNCLEARED PRIOR ERROR
TDSETI - UNCLEARED PRIOR ERROR
TDSETR - UNCLEARED PRIOR ERROR
TDSETR - UNRECOGNIZED PARAMETER NAME

COPYRIGHT

Copyright (C) 1987-2009
University Corporation for Atmospheric Research
The use of this Software is governed by a License Agreement.