From 4237a942ce01d8b7785fbfd4cdaade1e6c58ba0f Mon Sep 17 00:00:00 2001
From: Trammell Hudson <hudson@osresearch.net>
Date: Mon, 4 May 2015 21:10:38 -0400
Subject: [PATCH] getoptified

---
 faces.c | 151 +++++++++++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 133 insertions(+), 18 deletions(-)

diff --git a/faces.c b/faces.c
index b5c838c..cc4883c 100644
--- a/faces.c
+++ b/faces.c
@@ -10,11 +10,19 @@
 #include <math.h>
 #include <err.h>
 #include <assert.h>
+#include <getopt.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
 #include "v3.h"
 #include "stl_3d.h"
 
+
+static FILE * output;
+static int verbose;
+
 static const char * stroke_string
-	= "stroke-width=\"0.1px\" fill=\"none\"";
+	= "stroke-width=\"1px\" fill=\"none\"";
 
 static void
 svg_line(
@@ -30,7 +38,7 @@ svg_line(
 	v3_project(ref, p2, &x2, &y2);
 	const char * color = "#FF0000";
 
-	printf("<line x1=\"%f\" y1=\"%f\" x2=\"%f\" y2=\"%f\" stroke=\"%s\" %s/>\n",
+	fprintf(output, "<line x1=\"%f\" y1=\"%f\" x2=\"%f\" y2=\"%f\" stroke=\"%s\" %s/>\n",
 		x1, y1,
 		x2, y2,
 		color,
@@ -47,7 +55,7 @@ svg_circle(
 	const char * const color
 )
 {
-	printf("<circle cx=\"%f\" cy=\"%f\" r=\"%f\" stroke=\"%s\" %s/>\n",
+	fprintf(output, "<circle cx=\"%f\" cy=\"%f\" r=\"%f\" stroke=\"%s\" %s/>\n",
 		x,
 		y,
 		rad,
@@ -57,23 +65,128 @@ svg_circle(
 }
 
 
-int
-main(void)
+static struct option long_options[] = 
 {
-	stl_3d_t * const stl = stl_3d_parse(STDIN_FILENO);
-	if (!stl)
-		return EXIT_FAILURE;
-	const double inset_distance = 5;
-	const double hole_radius = 1.15;
+	{ "verbose",	no_argument,	   0, 'v' },
+	{ "inset",	required_argument, 0, 'i' },
+	{ "radius",     required_argument, 0, 'r' },
+	{ "input",      required_argument, 0, 'I' },
+	{ "output",	required_argument, 0, 'O' },
+	{ 0, 0, 0, 0 },
+};
 
-	int * const face_used = calloc(sizeof(*face_used), stl->num_face);
+
+static void
+usage(
+	FILE * const out
+)
+{
+	fprintf(out,
+		"Usage: faces [options] < stl-binary.stl > faces.svg\n"
+		"Options:\n"
+		" -v | --verbose      Enable verbosity\n"
+		" -i | --inset N      Inset mm\n"
+		" -r | --radius N     Hole radius mm\n"
+		" -I | --input file   Read binary STL from file\n"
+		" -O | --output file  Write SVG to file\n"
+		"\n"
+	);
+}
+
+
+int
+main(
+	int argc,
+	char ** argv
+)
+{
+	double inset_distance = 5;
+	double hole_radius = 1.15;
+	const char * input_file = NULL;
+	const char * output_file = NULL;
+	int option_index = 0;
+
+	while (1)
+	{
+		const int c = getopt_long(
+			argc,
+			argv,
+			"vI:r:i:O:",
+			long_options,
+			&option_index
+		);
+		if (c == -1)
+			break;
+		switch(c)
+		{
+		case 'v': verbose++; break;
+		case 'i': inset_distance = atof(optarg); break;
+		case 'r': hole_radius = atof(optarg); break;
+		case 'I': input_file = optarg; break;
+		case 'O': output_file = optarg; break;
+		case 'h': case '?':
+			usage(stdout);
+			return 0;
+		default:
+			usage(stderr);
+			return -1;
+		}
+	}
+
+	int input_fd;
+	if (!input_file)
+	{
+	 	input_fd= STDIN_FILENO;
+		input_file = "stdin";
+	} else {
+		input_fd = open(input_file, O_RDONLY);
+		if (input_fd < 0)
+		{
+			perror(input_file);
+			return -1;
+		}
+	}
+
+	if (!output_file)
+	{
+		output_file = "stdout";
+		output = stdout;
+	} else {
+		output = fopen(output_file, "w");
+		if (!output)
+		{
+			perror(output_file);
+			return -1;
+		}
+	}
+
+	stl_3d_t * const stl = stl_3d_parse(input_fd);
+	if (!stl)
+	{
+		fprintf(stderr, "%s: Unable to parse STL\n", input_file);
+		return EXIT_FAILURE;
+	}
+	close(input_fd);
+
+
+	if (verbose)
+		fprintf(stderr,
+			"%s: %d faces, %d vertex\n",
+			input_file,
+			stl->num_face,
+			stl->num_vertex
+		);
+
+	int * const face_used
+		= calloc(sizeof(*face_used), stl->num_face);
 
 	// for each vertex, find the coplanar triangles
 	// \todo: do coplanar bits
-	printf("<svg xmlns=\"http://www.w3.org/2000/svg\">\n");
-	printf("<g transform=\"scale(3.543307)\"><!-- scale to mm -->\n");
+	fprintf(output, "<svg xmlns=\"http://www.w3.org/2000/svg\">\n");
+	fprintf(output, "<g transform=\"scale(3.543307)\"><!-- scale to mm -->\n");
 
-	const stl_vertex_t ** const vertex_list = calloc(sizeof(*vertex_list), stl->num_vertex);
+	const stl_vertex_t ** const vertex_list
+		= calloc(sizeof(*vertex_list), stl->num_vertex);
 
 	for(int i = 0 ; i < stl->num_face ; i++)
 	{
@@ -89,7 +202,7 @@ main(void)
 			0
 		);
 
-		fprintf(stderr, "%d: %d vertices\n", i, vertex_count);
+		fprintf(stderr, "%s: %d: %d vertices\n", input_file, i, vertex_count);
 
 		// generate a refernce frame based on this face
 		refframe_t ref;
@@ -98,7 +211,7 @@ main(void)
 			f->vertex[1]->p,
 			f->vertex[2]->p
 		);
-		printf("<!-- face %d --><g>\n", i);
+		fprintf(output, "<!-- face %d --><g>\n", i);
 
 		// generate the polygon outline (should be one path?)
 		for (int j = 0 ; j < vertex_count ; j++)
@@ -120,10 +233,12 @@ main(void)
 			svg_circle(x, y, hole_radius, "#00ff00");
 		}
 
-		printf("</g>\n");
+		fprintf(output, "</g>\n");
 	}
 
-	printf("</g></svg>\n");
+	fprintf(output, "</g></svg>\n");
+
+	fclose(output);
 
 	return 0;
 }