1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <gset.h>
include <mach.h>
include <pkg/gtools.h>
include "icfit.h"
define MSIZE 2. # Mark size
# ICG_UNDELETE -- Undelete data point nearest the cursor.
# The nearest point to the cursor in NDC coordinates is determined.
procedure icg_undeleter (ic, gp, gt, cv, x, y, wts, userwts, npts, wx, wy)
pointer ic # ICFIT pointer
pointer gp # GIO pointer
pointer gt # GTOOLS pointer
pointer cv # CURFIT pointer
real x[npts], y[npts] # Data points
real wts[npts], userwts[npts] # Weight arrays
int npts # Number of points
real wx, wy # Position to be nearest
pointer sp, xout, yout
int gt_geti()
begin
call smark (sp)
call salloc (xout, npts, TY_REAL)
call salloc (yout, npts, TY_REAL)
call icg_axesr (ic, gt, cv, 1, x, y, Memr[xout], npts)
call icg_axesr (ic, gt, cv, 2, x, y, Memr[yout], npts)
if (gt_geti (gt, GTTRANSPOSE) == NO)
call icg_u1r (ic, gp, Memr[xout], Memr[yout], wts, userwts,
npts, wx, wy)
else
call icg_u1r (ic, gp, Memr[yout], Memr[xout], wts, userwts,
npts, wy, wx)
call sfree (sp)
end
# ICG_U1 -- Do the actual undelete.
procedure icg_u1r (ic, gp, x, y, wts, userwts, npts, wx, wy)
pointer ic # ICFIT pointer
pointer gp # GIO pointer
real x[npts], y[npts] # Data points
real wts[npts], userwts[npts] # Weight arrays
int npts # Number of points
real wx, wy # Position to be nearest
int i, j
real x0, y0, r2, r2min
begin
# Transform world cursor coordinates to NDC.
call gctran (gp, wx, wy, wx, wy, 1, 0)
# Search for nearest point to a point with zero weight.
r2min = MAX_REAL
do i = 1, npts {
if (wts[i] != 0.)
next
call gctran (gp, real (x[i]), real (y[i]), x0, y0, 1, 0)
r2 = (x0 - wx) ** 2 + (y0 - wy) ** 2
if (r2 < r2min) {
r2min = r2
j = i
}
}
# Unmark the deleted point and reset the weight.
if (j != 0) {
call gscur (gp, real (x[j]), real (y[j]))
call gseti (gp, G_PMLTYPE, GL_CLEAR)
call gmark (gp, real (x[j]), real (y[j]), GM_CROSS, MSIZE, MSIZE)
call gseti (gp, G_PMLTYPE, GL_SOLID)
call gline (gp, real (x[j]), real (y[j]), real (x[j]), real (y[j]))
wts[j] = userwts[j]
IC_NEWWTS(ic) = YES
}
end
|
