[brlcad-commits] SF.net SVN: brlcad:[33094] brlcad/trunk/src/proc-db/metaball.c

[<eri...@us...>]

Revision: 33094
          http://brlcad.svn.sourceforge.net/brlcad/?rev=33094&view=rev
Author:   erikgreenwald
Date:     2008-10-31 19:16:17 +0000 (Fri, 31 Oct 2008)

Log Message:
-----------
some quick scaffolding and the beginning of one of the modes

Modified Paths:
--------------
    brlcad/trunk/src/proc-db/metaball.c

Modified: brlcad/trunk/src/proc-db/metaball.c
===================================================================
--- brlcad/trunk/src/proc-db/metaball.c	2008-10-31 19:10:26 UTC (rev 33093)
+++ brlcad/trunk/src/proc-db/metaball.c	2008-10-31 19:16:17 UTC (rev 33094)
@@ -20,6 +20,7 @@
 
 /** @file metaball.c
  *
+ * He slimed me!
  */
 
 #include "common.h"
@@ -28,36 +29,139 @@
 #include <stdio.h>
 #include <math.h>
 #include <string.h>
+#include <unistd.h>
 
 #include "vmath.h"
 #include "raytrace.h"
 #include "wdb.h"
 
+#define FMTSIZ 64
 
-static const char usage[] = "Usage:\n\t%s []\n";
+static const char usage[] = "\
+Usage:\n\
+\t%s [-h] [-n number of frames] [-m method] [-o outfile]\n\
+\n\
+\t-h\tShow help\n\
+\t-n #\tNumber of frames to (objects) to create\n\
+\t-m #\tMetaball render method (1 for iso, 2 for Blinn)\n\
+\t-t title\tTitle of geometry\n\
+\t-o file\tFile to write to\n\
+\t-g\tGravotronic animation\n\
+\t-c #\tNumber of control points (require Gravotronic mode)\n\
+\n";
 
-struct rt_wdb	*outfp;
+/******************************************************************/
 
+/* hideous hack to generate a hideous dynamic format string for snprintf. *sob*/
 int
-main(int argc, char **argv)
+mkfmt(char *fmt, char *prefix, char *postfix, int nframes)
 {
-    char title[64] = "metaball";
+    return snprintf(fmt, FMTSIZ, "%s%%0%dd%s", prefix, (int)ceil(log10((double)nframes)), postfix);
+}
 
-    fprintf(stderr, "This is not the proc-db you are looking for\n");
-    exit(-42);
+int
+bitronic(struct rt_wdb *outfp, int method, int nframes)
+{
+    char buf[BUFSIZ], fmt[FMTSIZ];
+    double step = 2.0 / (double) nframes;
 
+    mkfmt(fmt, "mball", ".s", nframes);
+
+    while(nframes--) {
+	snprintf(buf, BUFSIZ, fmt, nframes);
+	printf("%s\t%f %f\n", buf, - ((double)nframes) * step, ((double)nframes) * step);
+    }
+    return EXIT_FAILURE;
+}
+
+int
+gravotronic(struct rt_wdb *outfp, int method, int nframes, int count)
+{
+    char buf[BUFSIZ], fmt[FMTSIZ];
+
+    mkfmt(fmt, "mball", ".s", nframes);
+    snprintf(buf, BUFSIZ, fmt, nframes);
     /* probably need a list or something
     BU_LIST_INIT( &head.l );
     */
     
-    outfp = wdb_fopen( "metaball.g" );
-    mk_id( outfp, title );
     /* do something
     mk_lfcomb( outfp, "mball.g", &head, 0 );
     */
 
+    return EXIT_FAILURE;
+}
+
+/******************************************************************/
+
+int
+main(int argc, char **argv)
+{
+    char title[BUFSIZ] = "metaball", outfile[MAXPATHLEN] = "metaball.g";
+    int nframes = 1, method = 1, optc, gravotron = 0, count = 0, retval = EXIT_SUCCESS;
+    struct rt_wdb *outfp;
+
+    while ( (optc = bu_getopt( argc, argv, "Hhm:n:o:t:" )) != -1 )
+	switch (optc) {
+	    case 'n' :
+		nframes = atoi(bu_optarg);
+		break;
+	    case 'm' :
+		method = atoi(bu_optarg);
+		break;
+	    case 't':
+		snprintf(title, BUFSIZ, "%s", bu_optarg);;
+		break;
+	    case 'o':
+		snprintf(outfile, MAXPATHLEN, "%s", bu_optarg);;
+		break;
+	    case 'g':
+		++gravotron;
+		break;
+	    case 'c':
+		count = atoi(bu_optarg);
+		break;
+	    case 'h' :
+	    case 'H' :
+	    case '?' :
+		printf(usage, *argv);
+		return optc == '?' ? EXIT_FAILURE : EXIT_SUCCESS;
+	}
+
+    /* sanity checking on the various parameters */
+
+    if(count && !gravotron) {
+	fprintf(stderr, "Count only works in gravotronic mode. Turning on the gravitrons.\n");
+	++gravotron;
+    }
+	
+    /* prepare for DB generation */
+
+    outfp = wdb_fopen( outfile );
+    if( outfp == RT_WDB_NULL ) {
+	perror("Failed to open file for writing. Aborting.\n");
+	return EXIT_FAILURE;
+    }
+    mk_id( outfp, title );
+
+    /* here we go! */
+
+    if(gravotron)
+	retval = gravotronic(outfp, method, nframes, count);
+    else
+	retval = bitronic(outfp, method, nframes);
+
+    /* and clean up  */
+
     wdb_close(outfp);
-    return 0;
+
+    if(retval != EXIT_SUCCESS) {
+	fprintf(stderr, "Removing \"%s\".\n", outfile);
+	if(unlink(outfile) == -1)
+	    perror("Failure removing: ");
+    }
+
+    return retval;
 }
 
 /*


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