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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*/
/** \file
* \ingroup bli
*/
#include "DNA_vec_types.h"
#include "BLI_math.h"
#include "BLI_strict_flags.h"
#include "BLI_lasso_2d.h" /* own include */
void BLI_lasso_boundbox(rcti *rect, const int mcords[][2], const unsigned int moves)
{
unsigned int a;
rect->xmin = rect->xmax = mcords[0][0];
rect->ymin = rect->ymax = mcords[0][1];
for (a = 1; a < moves; a++) {
if (mcords[a][0] < rect->xmin) {
rect->xmin = mcords[a][0];
}
else if (mcords[a][0] > rect->xmax) {
rect->xmax = mcords[a][0];
}
if (mcords[a][1] < rect->ymin) {
rect->ymin = mcords[a][1];
}
else if (mcords[a][1] > rect->ymax) {
rect->ymax = mcords[a][1];
}
}
}
bool BLI_lasso_is_point_inside(const int mcords[][2],
const unsigned int moves,
const int sx,
const int sy,
const int error_value)
{
if (sx == error_value || moves == 0) {
return false;
}
else {
int pt[2] = {sx, sy};
return isect_point_poly_v2_int(pt, mcords, moves, true);
}
}
/* edge version for lasso select. we assume boundbox check was done */
bool BLI_lasso_is_edge_inside(const int mcords[][2],
const unsigned int moves,
int x0,
int y0,
int x1,
int y1,
const int error_value)
{
if (x0 == error_value || x1 == error_value || moves == 0) {
return false;
}
const int v1[2] = {x0, y0}, v2[2] = {x1, y1};
/* check points in lasso */
if (BLI_lasso_is_point_inside(mcords, moves, v1[0], v1[1], error_value)) {
return true;
}
if (BLI_lasso_is_point_inside(mcords, moves, v2[0], v2[1], error_value)) {
return true;
}
/* no points in lasso, so we have to intersect with lasso edge */
if (isect_seg_seg_v2_int(mcords[0], mcords[moves - 1], v1, v2) > 0) {
return true;
}
for (unsigned int a = 0; a < moves - 1; a++) {
if (isect_seg_seg_v2_int(mcords[a], mcords[a + 1], v1, v2) > 0) {
return true;
}
}
return false;
}
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