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lios.cpp
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lios.cpp
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/*
*
* Pac-person freespace continuum undiscreted ( PPFCU or p-pf-scu-d ) - Copyright (C) 2018 by Mikko Heiska
*
*
*** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * The names of its contributors may not be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
**
**
****************************************************************************/
#include"lios.h"
bool lios( QImage &tau, int x1, int y1, int x2, int y2, QRgb hillcoloruint )
{
bool tre=0;
int skip=20;
int x, y;
double ku;
if( x1<0 ) x1=0;
if( y1<0 ) y1=0;
if( x2<0 ) x2=0;
if( y2<0 ) y2=0;
int xr=tau.width();
int yr=tau.height();
if( x1>=xr-1 ) x1=xr-2;
if( y1>=yr-1 ) y1=yr-2;
if( x2>=xr-1 ) x2=xr-2;
if( y2>=yr-1 ) y2=yr-2;
ku= double( y2-y1 ) / double( x2-x1 );
if( ku<1 and ku>-1 )
{
if( x2>x1 )
{
for( x=x1 ; x<x2 ; x+=skip )
{
y=( double( x-x1 )*ku )+y1;
// if( y>=yr ) {
// cout << " ERROR: lios 1x " << x << " y " << y << endl; }
if( tau.pixel( x, y )==hillcoloruint )
{
return 1;
}
}
for( x=x1 ; x<x2 ; x++ )
{
y=( double( x-x1 )*ku )+y1;
// if( y>=yr ) {
// cout << " ERROR: lios 1x " << x << " y " << y << endl; }
if( tau.pixel( x, y )==hillcoloruint )
{
return 1;
}
}
}
else
{
for( x=x1 ; x>x2 ; x-=skip )
{
y=( double( x-x1 )*ku )+y1;
//if( y>=yr ) {
// cout << " ERROR: lios 2x " << x << " y " << y << " y1=" << y1 << " y2= " << y2 << endl; }
if( tau.pixel( x, y )==hillcoloruint )
{
return 1;
}
}
for( x=x1 ; x>x2 ; x-- )
{
y=( double( x-x1 )*ku )+y1;
//if( y>=yr ) {
// cout << " ERROR: lios 2x " << x << " y " << y << " y1=" << y1 << " y2= " << y2 << endl; }
if( tau.pixel( x, y )==hillcoloruint )
{
return 1;
}
}
}
}
else
{
ku=double( x2-x1 ) / double( y2-y1 );
if( y2>y1 )
{
for( y=y1 ; y<y2 ; y+=skip )
{
x=( double( y-y1 )*ku )+x1;
//if( y>=yr ) {
// cout << " ERROR: lios 3x " << x << " y " << y << endl; }
if( tau.pixel( x, y )==hillcoloruint )
{
return 1;
}
}
for( y=y1 ; y<y2 ; y++ )
{
x=( double( y-y1 )*ku )+x1;
//if( y>=yr ) {
// cout << " ERROR: lios 3x " << x << " y " << y << endl; }
if( tau.pixel( x, y )==hillcoloruint )
{
return 1;
}
}
}
else
{
for( y=y1 ; y>y2 ; y-=skip )
{
x=( double( y-y1 )*ku )+x1;
//if( y>=yr ) {
// cout << " ERROR: lios 4x " << x << " y " << y << endl; }
if( tau.pixel( x, y )==hillcoloruint )
{
return 1;
}
}
for( y=y1 ; y>y2 ; y-- )
{
x=( double( y-y1 )*ku )+x1;
//if( y>=yr ) {
// cout << " ERROR: lios 4x " << x << " y " << y << endl; }
if( tau.pixel( x, y )==hillcoloruint )
{
return 1;
}
}
}
}
return tre;
}