59 lines
1.9 KiB
C
59 lines
1.9 KiB
C
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/*
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* GDSII-Converter
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* Copyright (C) 2018 Mario Hüttel <mario.huettel@gmx.net>
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*
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* This file is part of GDSII-Converter.
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*
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* GDSII-Converter is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* GDSII-Converter is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file bounding-box.c
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* @brief Calculation of bounding boxes
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* @author Mario Hüttel <mario.huettel@gmx.net>
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*/
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#include <stdio.h>
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#include "bounding-box.h"
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#define MIN(a,b) (((a) < (b)) ? (a) : (b)) /**< @brief Return smaller number */
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#define MAX(a,b) (((a) > (b)) ? (a) : (b)) /**< @brief Return bigger number */
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void bounding_box_calculate_polygon(GList *vertices, conv_generic_to_vector_2d_t conv_func, union bounding_box *box)
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{
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double xmin = DBL_MAX, xmax = DBL_MIN, ymin = DBL_MAX, ymax = DBL_MIN;
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struct vector_2d temp_vec;
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GList *list_item;
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/* Check for errors */
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if (!conv_func || !box || !vertices)
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return;
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for (list_item = vertices; list_item != NULL; list_item = g_list_next(list_item)) {
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/* Convert generic vertex to vector_2d */
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conv_func((void *)list_item->data, &temp_vec);
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/* Update bounding coordinates with vertex */
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xmin = MIN(xmin, temp_vec.x);
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xmax = MAX(xmax, temp_vec.x);
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ymin = MIN(ymin, temp_vec.y);
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ymax = MAX(ymax, temp_vec.y);
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}
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/* Fill bounding box with results */
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box->vectors.lower_left.x = xmin;
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box->vectors.lower_left.y = ymin;
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box->vectors.upper_right.x = xmax;
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box->vectors.upper_right.y = ymax;
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}
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