The following macros are only relevant with type 4 user functions.
Since
C-PLOT may keep data points in temporary
files, access to the points is through functions rather than a static
array.
The functions, described later, require the address of the
C-PLOT data structure, which is named
Point. Within your C code, you declare storage for one of these structures
and access it through the following macros, which also require the
address of the storage of the
Point.
| Name |
What it Does |
 |
|
|
set_x(p, x) |
Assign x to Point whose address is p |
set_y(p, y) |
Assign y to Point whose address is p |
set_z(p, z) |
Assign z to Point whose address is p |
set_r(p, r) |
Assign r to Point whose address is p |
set_s(p, s) |
Assign s to Point whose address is p |
set_up_pen(p) |
Assign up line control to Point whose address is p |
set_down_pen(p) |
Assign down line control to Point whose address is p |
get_x(p) |
Value is x of Point whose address is p |
get_y(p) |
Value is y of Point whose address is p |
get_z(p) |
Value is z of Point whose address is p |
get_r(p) |
Value is r of Point whose address is p |
get_s(p) |
Value is s of Point whose address is p |
get_pen(p) |
Value is non-zero if Point has up line control |
|
The following functions provide the interface between your code and
the routines in the overhead modules.
