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/*
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* This file is a part of Poly2Tri-C
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* (c) Barak Itkin <lightningismyname@gmail.com>
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* http://code.google.com/p/poly2tri-c/
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of Poly2Tri nor the names of its contributors may be
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* used to endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* The file format:
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* P <X> <Y> - Specify a Point (the default is that it belongs to the
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* outline). The second line in the file must be of this type!
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* H <X> <Y> - Specify that all points from here on (including this one)
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* belong to a new Hole. This will stop only on the next 'H'
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* directive (which will create a new hole)
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* S <X> <Y> - Specify a Steiner point. Can appear anywhere.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <glib.h>
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#include <poly2tri-c/p2t/poly2tri.h>
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#include <poly2tri-c/refine/refine.h>
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#include <poly2tri-c/render/svg-plot.h>
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#include <poly2tri-c/render/mesh-render.h>
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#include <string.h>
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static gint refine_max_steps = 1000;
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static gboolean debug_print = TRUE;
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static gboolean verbose = TRUE;
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static gchar *input_file = NULL;
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static gchar *output_file = NULL;
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static gboolean render_mesh = FALSE;
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static gboolean render_svg = FALSE;
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static gint mesh_width = 100;
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static gint mesh_height = 100;
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static GOptionEntry entries[] =
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{
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{ "refine-max-steps", 'r', 0, G_OPTION_ARG_INT, &refine_max_steps, "Set maximal refinement steps to N", "N" },
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{ "verbose", 'v', 0, G_OPTION_ARG_NONE, &verbose, "Print output?", NULL },
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{ "debug", 'd', 0, G_OPTION_ARG_NONE, &debug_print, "Enable debug printing", NULL },
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{ "input", 'i', 0, G_OPTION_ARG_FILENAME, &input_file, "Use input file at FILE_IN", "FILE_IN" },
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{ "output", 'o', 0, G_OPTION_ARG_FILENAME, &output_file, "Use output file at FILE_OUT", "FILE_OUT" },
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{ "render-mesh", 'm', 0, G_OPTION_ARG_NONE, &render_mesh, "Render a color mesh of the result", NULL },
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{ "mesh-width", 'w', 0, G_OPTION_ARG_INT, &mesh_width, "The width of the color mesh image", NULL },
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{ "mesh-height", 'h', 0, G_OPTION_ARG_INT, &mesh_height, "The height of the color mesh iamge",NULL },
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{ "render-svg", 's', 0, G_OPTION_ARG_NONE, &render_svg, "Render an outline of the result", NULL },
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{ NULL }
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};
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typedef enum {
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PTS_POINTS = 'P',
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PTS_HOLE = 'H',
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PTS_STEINER = 'S'
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} PtsFilePartType;
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typedef struct
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{
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PtsFilePartType type;
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union {
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GPtrArray *points;
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P2tPoint *point;
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} data;
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} PtsFilePart;
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/**
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* read_points_file:
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* @param path The path to the points & colors file
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* @param points An pointer to an array of pointers to @ref P2RrPoint will be returned
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* here. NULL can be passed.
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* @param colors An pointer to an array of colors will be returned here. NULL can be
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* passed.
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*/
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GQueue*
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read_points_file (const gchar *path)
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{
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int line;
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FILE *f = fopen (path, "r");
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PtsFilePart *current_part, *temp_part;
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GPtrArray *current_points;
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GQueue *file_parts = g_queue_new ();
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if (f == NULL)
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{
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g_print ("Error! Could not read input file!");
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exit (1);
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}
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if (verbose)
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g_print ("Now parsing \"%s\"\n", path);
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current_part = g_slice_new (PtsFilePart);
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current_part->type = PTS_POINTS;
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current_points = current_part->data.points = g_ptr_array_new ();
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g_queue_push_tail (file_parts, current_part);
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line = 0;
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while (! feof (f))
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{
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char type;
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float x, y;
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int read_size;
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gboolean error = FALSE;
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++line;
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read_size = fscanf (f, " %[a-zA-Z]", &type);
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if (read_size != 1)
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{
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g_error ("Expected a command type!");
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exit (1);
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}
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switch (type)
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{
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case PTS_HOLE:
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if (verbose) g_print ("Found a hole on directive %d\n", line);
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current_part = g_slice_new (PtsFilePart);
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current_part->type = PTS_HOLE;
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current_points = current_part->data.points = g_ptr_array_new ();
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g_queue_push_tail (file_parts, current_part);
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/* Intentionally no break! */
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case PTS_POINTS:
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read_size = fscanf (f, "%f %f", &x, &y);
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if ((error = (read_size != 2))) break;
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g_ptr_array_add (current_points, p2t_point_new_dd (x, y));
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break;
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case PTS_STEINER:
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if (verbose) g_print ("Found a steiner point on directive %d\n", line);
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temp_part = g_slice_new (PtsFilePart);
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temp_part->type = PTS_STEINER;
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g_queue_push_tail (file_parts, temp_part);
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read_size = fscanf (f, "%f %f", &x, &y);
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if ((error = (read_size != 2))) break;
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temp_part->data.point = p2t_point_new_dd (x, y);
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break;
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default:
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error = TRUE;
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break;
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}
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if (error)
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{
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g_error ("Bad directive number %d!", line);
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exit (1);
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}
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/* Consume additional spaces, to detect EOF properly */
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read_size = fscanf (f, " ");
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}
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fclose (f);
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return file_parts;
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}
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void
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free_read_results (GQueue *file_parts)
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{
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while (! g_queue_is_empty (file_parts))
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{
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PtsFilePart *temp = (PtsFilePart*) g_queue_pop_head (file_parts);
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GPtrArray *pts;
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gint i;
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switch (temp->type)
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{
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case PTS_HOLE:
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case PTS_POINTS:
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pts = temp->data.points;
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for (i = 0; i < pts->len; ++i)
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p2t_point_free (point_index (pts, i));
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g_ptr_array_free (pts, TRUE);
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break;
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case PTS_STEINER:
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p2t_point_free (temp->data.point);
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break;
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}
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g_slice_free (PtsFilePart, temp);
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}
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g_queue_free (file_parts);
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}
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/* Calculate a "deterministic random" color for each point
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* based on its memory address. Since we know that least-significant bytes
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* of the point address will change more than the mor-important ones, we
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* make sure to take them into consideration in all the color channels.
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*/
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static void
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test_point_to_color (P2trPoint* point, guint8 *dest, gpointer user_data)
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{
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gulong value = (gulong) point;
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guchar b1 = value & 0xff, b2 = (value & 0xff00) >> 2, b3 = (value & 0xff0000) >> 4;
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dest[0] = b1;
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dest[1] = (b1 ^ b2);
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dest[2] = (b1 ^ b3);
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}
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void
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p2tr_write_rgb_ppm (FILE *f,
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guint8 *dest,
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P2trImageConfig *config)
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{
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gint x, y;
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guint8 *pixel;
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fprintf (f, "P3\n");
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fprintf (f, "%d %d\n", config->x_samples, config->y_samples);
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fprintf (f, "255\n");
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pixel = dest;
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for (y = 0; y < config->y_samples; y++)
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{
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for (x = 0; x < config->x_samples; x++)
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{
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if (pixel[3] <= 0.5)
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fprintf (f, " 0 0 0");
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else
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fprintf (f, "%3d %3d %3d", pixel[0], pixel[1], pixel[2]);
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if (x != config->x_samples - 1)
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fprintf (f, " ");
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pixel += 4;
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}
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fprintf (f, "\n");
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}
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}
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gint main (int argc, char *argv[])
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{
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FILE *svg_out = NULL, *mesh_out = NULL;
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gchar *svg_out_path, *mesh_out_path;
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GError *error = NULL;
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GOptionContext *context;
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GQueue *pts_parts;
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GList *pts_iter;
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PtsFilePart *cur_part;
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P2tCDT *cdt;
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P2trCDT *rcdt;
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P2trRefiner *refiner;
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context = g_option_context_new ("- Create a fine mesh from a given PSLG");
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g_option_context_add_main_entries (context, entries, NULL);
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if (!g_option_context_parse (context, &argc, &argv, &error))
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{
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g_print ("option parsing failed: %s\n", error->message);
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exit (1);
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}
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g_option_context_free (context);
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if (input_file == NULL)
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{
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g_print ("No input file given. Stop.");
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exit (1);
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}
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if (! g_file_test (input_file, G_FILE_TEST_EXISTS))
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{
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g_print ("Input file does not exist. Stop.");
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exit (1);
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}
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if (output_file == NULL && (render_svg || render_mesh))
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{
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g_print ("No output file given. Stop.");
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exit (1);
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}
|
| 307 |
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if (render_svg)
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{
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svg_out_path = g_newa (gchar, strlen (output_file) + 4);
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sprintf (svg_out_path, "%s.svg", output_file);
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| 312 |
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if ((svg_out = fopen (svg_out_path, "w")) == NULL)
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{
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g_print ("Can't open the svg output file. Stop.");
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| 316 |
exit (1);
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| 317 |
}
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| 318 |
}
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if (render_mesh)
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{
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| 322 |
mesh_out_path = g_newa (gchar, strlen (output_file) + 4);
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sprintf (mesh_out_path, "%s.ppm", output_file);
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if ((mesh_out = fopen (mesh_out_path, "w")) == NULL)
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{
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g_print ("Can't open the mesh output file. Stop.");
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exit (1);
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}
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}
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pts_parts = read_points_file (input_file);
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for (pts_iter = pts_parts->head; pts_iter != NULL; pts_iter = pts_iter->next)
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{
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cur_part = (PtsFilePart*) pts_iter->data;
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switch (cur_part->type)
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{
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case PTS_POINTS:
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case PTS_HOLE:
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if (cur_part->data.points->len < 3)
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{
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g_error ("Expected at least 3 points in eahc point sequence!");
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| 344 |
exit (1);
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| 345 |
}
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| 346 |
break;
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| 347 |
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| 348 |
default:
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| 349 |
break;
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| 350 |
}
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| 351 |
}
|
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pts_iter = pts_parts->head;
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| 354 |
cdt = p2t_cdt_new (((PtsFilePart*)pts_iter->data)->data.points);
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| 355 |
for (pts_iter = pts_iter->next; pts_iter != NULL; pts_iter = pts_iter->next)
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| 356 |
{
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| 357 |
cur_part = (PtsFilePart*) pts_iter->data;
|
| 358 |
switch (cur_part->type)
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| 359 |
{
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| 360 |
case PTS_STEINER:
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| 361 |
p2t_cdt_add_point (cdt, cur_part->data.point);
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| 362 |
break;
|
| 363 |
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| 364 |
case PTS_HOLE:
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| 365 |
p2t_cdt_add_hole (cdt, cur_part->data.points);
|
| 366 |
break;
|
| 367 |
|
| 368 |
case PTS_POINTS:
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| 369 |
g_assert_not_reached ();
|
| 370 |
break;
|
| 371 |
|
| 372 |
default:
|
| 373 |
break;
|
| 374 |
}
|
| 375 |
}
|
| 376 |
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| 377 |
p2t_cdt_triangulate (cdt);
|
| 378 |
|
| 379 |
rcdt = p2tr_cdt_new (cdt);
|
| 380 |
p2t_cdt_free (cdt);
|
| 381 |
|
| 382 |
if (refine_max_steps > 0)
|
| 383 |
{
|
| 384 |
g_print ("Refining the mesh!\n");
|
| 385 |
refiner = p2tr_refiner_new (G_PI / 6, p2tr_refiner_false_too_big, rcdt);
|
| 386 |
p2tr_refiner_refine (refiner, refine_max_steps, NULL);
|
| 387 |
p2tr_refiner_free (refiner);
|
| 388 |
}
|
| 389 |
|
| 390 |
if (render_svg)
|
| 391 |
{
|
| 392 |
g_print ("Rendering SVG outline!");
|
| 393 |
p2tr_render_svg (rcdt->mesh, svg_out);
|
| 394 |
fclose (svg_out);
|
| 395 |
}
|
| 396 |
|
| 397 |
if (render_mesh)
|
| 398 |
{
|
| 399 |
P2trImageConfig imc;
|
| 400 |
guint8 *im;
|
| 401 |
gdouble min_x, min_y, max_x, max_y;
|
| 402 |
|
| 403 |
g_print ("Rendering color interpolation!");
|
| 404 |
|
| 405 |
p2tr_mesh_get_bounds (rcdt->mesh, &min_x, &min_y, &max_x, &max_y);
|
| 406 |
|
| 407 |
imc.cpp = 3;
|
| 408 |
imc.min_x = min_x;
|
| 409 |
imc.min_y = min_y;
|
| 410 |
imc.step_x = (max_x - min_x) / ((gfloat) mesh_width - 1);
|
| 411 |
imc.step_y = (max_y - min_y) / ((gfloat) mesh_height - 1);
|
| 412 |
imc.x_samples = mesh_width;
|
| 413 |
imc.y_samples = mesh_height;
|
| 414 |
imc.alpha_last = TRUE;
|
| 415 |
|
| 416 |
im = g_new (guint8, (1 + imc.cpp) * imc.x_samples * imc.y_samples);
|
| 417 |
|
| 418 |
p2tr_mesh_render_b (rcdt->mesh, im, &imc, test_point_to_color, NULL);
|
| 419 |
|
| 420 |
p2tr_write_rgb_ppm (mesh_out, im, &imc);
|
| 421 |
fclose (mesh_out);
|
| 422 |
|
| 423 |
g_free (im);
|
| 424 |
}
|
| 425 |
|
| 426 |
p2tr_cdt_free (rcdt);
|
| 427 |
free_read_results (pts_parts);
|
| 428 |
|
| 429 |
return 0;
|
| 430 |
}
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