- Added space below non doc-string comments to make it clear these aren't comments for the symbols directly below them. - Use doxy sections for some headers. - Minor improvements to doc-strings. Ref T92709
104 lines
3.0 KiB
C
104 lines
3.0 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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 this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
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* All rights reserved.
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*/
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/** \file
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* \ingroup bli
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*/
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#include "DNA_vec_types.h"
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#include "BLI_math.h"
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#include "BLI_strict_flags.h"
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#include "BLI_lasso_2d.h" /* own include */
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void BLI_lasso_boundbox(rcti *rect, const int mcoords[][2], const unsigned int mcoords_len)
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{
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unsigned int a;
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rect->xmin = rect->xmax = mcoords[0][0];
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rect->ymin = rect->ymax = mcoords[0][1];
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for (a = 1; a < mcoords_len; a++) {
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if (mcoords[a][0] < rect->xmin) {
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rect->xmin = mcoords[a][0];
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}
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else if (mcoords[a][0] > rect->xmax) {
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rect->xmax = mcoords[a][0];
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}
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if (mcoords[a][1] < rect->ymin) {
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rect->ymin = mcoords[a][1];
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}
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else if (mcoords[a][1] > rect->ymax) {
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rect->ymax = mcoords[a][1];
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}
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}
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}
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bool BLI_lasso_is_point_inside(const int mcoords[][2],
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const unsigned int mcoords_len,
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const int sx,
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const int sy,
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const int error_value)
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{
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if (sx == error_value || mcoords_len == 0) {
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return false;
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}
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const int pt[2] = {sx, sy};
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return isect_point_poly_v2_int(pt, mcoords, mcoords_len, true);
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}
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bool BLI_lasso_is_edge_inside(const int mcoords[][2],
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const unsigned int mcoords_len,
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int x0,
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int y0,
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int x1,
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int y1,
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const int error_value)
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{
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if (x0 == error_value || x1 == error_value || mcoords_len == 0) {
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return false;
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}
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const int v1[2] = {x0, y0}, v2[2] = {x1, y1};
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/* check points in lasso */
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if (BLI_lasso_is_point_inside(mcoords, mcoords_len, v1[0], v1[1], error_value)) {
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return true;
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}
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if (BLI_lasso_is_point_inside(mcoords, mcoords_len, v2[0], v2[1], error_value)) {
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return true;
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}
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/* no points in lasso, so we have to intersect with lasso edge */
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if (isect_seg_seg_v2_int(mcoords[0], mcoords[mcoords_len - 1], v1, v2) > 0) {
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return true;
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}
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for (unsigned int a = 0; a < mcoords_len - 1; a++) {
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if (isect_seg_seg_v2_int(mcoords[a], mcoords[a + 1], v1, v2) > 0) {
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return true;
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}
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}
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return false;
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}
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