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
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
/* Graphics_altitude.cpp
*
* Copyright (C) 1992-2011 Paul Boersma
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* pb 2002/03/07 GPL
* pb 2008/01/19 double
* pb 2011/03/17 C++
*/
#include "Graphics.h"
static int empty (double **data, int **right, int **below, long row1, long col1, double height, int row, int col, int ori) {
if (ori == 3) { row ++; ori = 1; } else if (ori == 2) { col ++; ori = 4; }
if (ori == 1)
return (data [row] [col] < height) != (data [row] [col + 1] < height) &&
! right [row - row1] [col - col1];
else /* ori == 4 */
return (data [row] [col] < height) != (data [row + 1] [col] < height) &&
! below [row - row1] [col - col1];
}
#define MAXALTSIDE 50
#define MAXALTPATH (2 * MAXALTSIDE * (MAXALTSIDE - 1) + 2)
static long numberOfPoints;
static long row1, row2, col1, col2;
static int **right, **below;
static double *x, *y;
static int closed;
static double dx, dy, xoff, yoff;
static int note (double **z, double height, int row, int col, int ori, int forget) {
++ numberOfPoints;
Melder_assert (numberOfPoints <= MAXALTPATH);
if (ori == 3) { row ++; ori = 1; } else if (ori == 2) { col ++; ori = 4; }
if (ori == 1) {
if (forget) right [row - row1] [col - col1] = 1;
x [numberOfPoints] = xoff +
(col + (height - z [row] [col]) / (z [row] [col + 1] - z [row] [col])) * dx;
y [numberOfPoints] = yoff + row * dy;
} else { /* ori == 4 */
if (forget) below [row - row1] [col - col1] = 1;
x [numberOfPoints] = xoff + col * dx;
y [numberOfPoints] = yoff +
(row + (height - z [row] [col]) / (z [row + 1] [col] - z [row] [col])) * dy;
}
return 1;
}
static void makeContour (Graphics graphics, double **z, double height, int row0, int col0, int ori0) {
int row, col, ori, clockwise = 0, edge = 0;
numberOfPoints = 0;
row = row0; col = col0; ori = ori0;
note (z, height, row0, col0, ori0, 0);
do {
clockwise = ! (ori & 1);
do { /* Preference for contours perpendicular to x == y. */
ori = (clockwise ? ori : ori + 2) % 4 + 1;
} while (! empty (z, right, below, row1, col1, height, row, col, ori));
if (! closed) switch (ori) {
case 1: edge = row == row1; break;
case 2: edge = col == col2 - 1; break;
case 3: edge = row == row2 - 1; break;
case 4: edge = col == col1; break;
}
if (! edge) {
switch (ori) {
case 1: row --; break;
case 2: col ++; break;
case 3: row ++; break;
case 4: col --; break;
}
ori = (ori + 1) % 4 + 1;
}
if (! note (z, height, row, col, ori, 1)) return;
}
while (edge == 0 && (row != row0 || col != col0 || ori != ori0));
if (closed) note (z, height, row0, col0, ori0, 1); /* Close the contour. */
Graphics_polyline (graphics, numberOfPoints, & x [1], & y [1]);
}
static void smallAlt (Graphics graphics, double **z, double height) {
int row, col;
for (row = 0; row < MAXALTSIDE; row ++) for (col = 0; col < MAXALTSIDE; col ++)
right [row] [col] = below [row] [col] = 0;
/* Find all the edge contours of this border value. */
closed = 0;
for (col = col1; col < col2; col ++)
if (empty (z, right, below, row1, col1, height, row1, col, 1))
makeContour (graphics, z, height, row1, col, 1);
for (row = row1; row < row2; row ++)
if (empty (z, right, below, row1, col1, height, row, col2 - 1, 2))
makeContour (graphics, z, height, row, col2 - 1, 2);
for (col = col2 - 1; col >= col1; col --)
if (empty (z, right, below, row1, col1, height, row2 - 1, col, 3))
makeContour (graphics, z, height, row2 - 1, col, 3);
for (row = row2 - 1; row >= row1; row --)
if (empty (z, right, below, row1, col1, height, row, col1, 4))
makeContour (graphics, z, height, row, col1, 4);
/* Find all the closed contours of this border value. */
closed = 1;
for (row = row1 + 1; row < row2; row ++)
for (col = col1; col < col2; col ++)
if (empty (z, right, below, row1, col1, height, row, col, 1))
makeContour (graphics, z, height, row, col, 1);
for (col = col1 + 1; col < col2; col ++)
for (row = row1; row < row2; row ++)
if (empty (z, right, below, row1, col1, height, row, col, 4))
makeContour (graphics, z, height, row, col, 4);
}
void Graphics_contour (Graphics me, double **z,
long ix1, long ix2, double x1WC, double x2WC,
long iy1, long iy2, double y1WC, double y2WC,
double height)
{
if (ix2 <= ix1 || iy2 <= iy1) return;
dx = (x2WC - x1WC) / (ix2 - ix1);
dy = (y2WC - y1WC) / (iy2 - iy1);
xoff = x1WC - ix1 * dx;
yoff = y1WC - iy1 * dy;
if (! right) { // static!
right = NUMmatrix <int> (0, MAXALTSIDE - 1, 0, MAXALTSIDE - 1);
below = NUMmatrix <int> (0, MAXALTSIDE - 1, 0, MAXALTSIDE - 1);
x = NUMvector <double> (1, MAXALTPATH);
y = NUMvector <double> (1, MAXALTPATH);
}
for (row1 = iy1; row1 < iy2; row1 += MAXALTSIDE - 1) {
for (col1 = ix1; col1 < ix2; col1 += MAXALTSIDE - 1) {
if ((row2 = row1 + (MAXALTSIDE - 1)) > iy2) row2 = iy2;
if ((col2 = col1 + (MAXALTSIDE - 1)) > ix2) col2 = ix2;
smallAlt (me, z, height);
}
}
}
void Graphics_altitude (Graphics me, double **z,
long ix1, long ix2, double x1WC, double x2WC,
long iy1, long iy2, double y1WC, double y2WC,
int numberOfBorders, double borders [])
{
int iborder;
if (ix2 <= ix1 || iy2 <= iy1) return;
dx = (x2WC - x1WC) / (ix2 - ix1);
dy = (y2WC - y1WC) / (iy2 - iy1);
xoff = x1WC - ix1 * dx;
yoff = y1WC - iy1 * dy;
if (! right) { // static!
right = NUMmatrix <int> (0, MAXALTSIDE - 1, 0, MAXALTSIDE - 1);
below = NUMmatrix <int> (0, MAXALTSIDE - 1, 0, MAXALTSIDE - 1);
x = NUMvector <double> (1, MAXALTPATH);
y = NUMvector <double> (1, MAXALTPATH);
}
for (row1 = iy1; row1 < iy2; row1 += MAXALTSIDE - 1) {
for (col1 = ix1; col1 < ix2; col1 += MAXALTSIDE - 1) {
if ((row2 = row1 + (MAXALTSIDE - 1)) > iy2) row2 = iy2;
if ((col2 = col1 + (MAXALTSIDE - 1)) > ix2) col2 = ix2;
for (iborder = 1; iborder <= numberOfBorders; iborder ++) {
smallAlt (me, z, borders [iborder]);
}
}
}
}
/* End of file Graphics_altitude.cpp */
|
