-
Notifications
You must be signed in to change notification settings - Fork 0
/
rockerode.c
163 lines (133 loc) · 5.36 KB
/
rockerode.c
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
/*************************************************************
*
* rockerode.c - Apply fluvial erosion to a tri mesh
*
* Mark J. Stock, mstock@umich.edu
*
*
* rocktools - Tools for creating and manipulating triangular meshes
* Copyright (C) 1999,2002-03,06,14 Mark J. Stock
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*********************************************************** */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include "structs.h"
node_ptr node_head = NULL;
norm_ptr norm_head = NULL;
text_ptr text_head = NULL;
int num_tri = 0;
int Usage(char[MAX_FN_LEN],int);
extern int find_flow(tri_pointer);
extern int fill_basins(tri_pointer);
extern int erode_surface(tri_pointer, double);
int main(int argc,char **argv) {
int i;
int step = 0;
int total_steps = 1; /* total number of erosion steps */
int do_erosion= 0; /* perturb nodes to smooth shape? */
double erosion_factor = 0.0; /* amount of smoothing to take place */
//double v_thresh = 1.0; /* threshhold for common normal, convex edge */
//double c_thresh = 1.0; /* threshhold for common normal, concave edge */
char infile[MAX_FN_LEN]; /* name of input file, TIN only for starters */
char progname[MAX_FN_LEN]; /* name of binary executable */
char output_format[4]; /* file format extension for output */
tri_pointer tri_head = NULL;
/* Parse command-line args */
(void) strcpy(progname,argv[0]);
if (argc < 2) (void) Usage(progname,0);
if (strncmp(argv[1], "-help", 2) == 0)
(void) Usage(progname,0);
(void) strcpy(infile,argv[1]);
for (i=2; i<argc; i++) {
if (strncmp(argv[i], "-e", 2) == 0) {
do_erosion = 1;
erosion_factor = 1.0;
if (i < argc-1)
if (strncmp(argv[i+1], "-", 1) != 0)
erosion_factor = atof(argv[++i]);
} else if (strncmp(argv[i], "-s", 2) == 0) {
total_steps = atoi(argv[++i]);
} else if (strncmp(argv[i], "-o", 2) == 0) {
strncpy(output_format,argv[i]+2,3);
} else
(void) Usage(progname,0);
}
/* Read the input file */
tri_head = read_input(infile,FALSE,NULL);
/* Create the linked list of node connectivity (just uses node_head) */
(void) set_node_connectivity();
// first, fill basins to prevent flow (rivers) from disappearing
fprintf(stderr,"Filling basins");
for (step=0; step<100; step++) {
fprintf(stderr,".");
(void) find_flow(tri_head);
(void) fill_basins(tri_head);
}
fprintf(stderr,"\n");
// Then, run one or several erosion steps
if (do_erosion)
for (step=0; step<total_steps; step++) {
fprintf(stderr,"Eroding %d.\n",step);
// Calculate the flow
(void) find_flow(tri_head);
// Fill the basins (so flow goes somewhere)
(void) fill_basins(tri_head);
// Apply erosion
(void) find_flow(tri_head);
(void) erode_surface(tri_head,erosion_factor);
}
/* Write triangles to stdout */
(void) write_output(tri_head,output_format,TRUE,argc,argv);
/* Somehow, write flow data somewhere */
/* (void) write_flow_data(); */
fprintf(stderr,"Done.\n");
exit(0);
}
/*
* This function writes basic usage information to stderr,
* and then quits. Too bad.
*/
int Usage(char progname[MAX_FN_LEN],int status) {
/* Usage for rockerode */
static char **cpp, *help_message[] =
{
"where [-options] are one or more of the following: ",
" ",
" -e [val] do an erosion calculation, optionally change the erosion ",
" rate, which defaults to 1.0 ",
" ",
" -s num compute num erosion steps ",
" ",
" -okey specify output format, key= raw, rad, pov, obj, tin, rib ",
" default = raw ",
" ",
" -help (in place of infile) returns this help information ",
" ",
"The input file can be of .obj, .raw, or .tin format, and the program ",
" requires a valid 3-character extension for the input file.",
" ",
"Output is to stdout",
NULL
};
fprintf(stderr, "usage:\n %s infile [-options]\n\n", progname);
for (cpp = help_message; *cpp; cpp++) fprintf(stderr, "%s\n", *cpp);
fflush(stderr);
exit(status);
return(0);
}