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/* XTrkCad - Model Railroad CAD
* Copyright (C) 2005 Dave Bullis
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "utility.h"
#define GETMAXY \
if (lp->y0 > maxY) maxY = lp->y0; \
if (lp->y1 > maxY) maxY = lp->y1
static int trackSeparation = 20;
static int arrowHeadLength = 10;
static double FindCenter(
coOrd * pos,
coOrd p0,
coOrd p1,
double radius )
{
double d;
double a0, a1;
d = FindDistance( p0, p1 )/2.0;
a0 = FindAngle( p0, p1 );
a1 = NormalizeAngle(R2D(asin( d/radius )));
if (a1 > 180)
a1 -= 360;
/*a0 = NormalizeAngle( a0 + (radius>0 ? +(90.0-a1) : -(90.0-a1) ) );*/
a0 = NormalizeAngle( a0 + (90.0-a1) );
Translate( pos, p0, a0, radius );
/*fprintf(stderr,"Center = %0.3f %0.3f\n", pos->x, pos->y );*/
return a1*2.0;
}
static void buildDesignerLines( FILE * inf, FILE * outf )
{
char line[80];
int j;
double num;
double radius;
coOrd p0, p1, q0, q1, pc;
double a0, a1;
double len;
while ( fgets( line, sizeof line, inf ) != NULL ) {
if ( strncmp( line, "ARROW", 5 ) == 0 ) {
if ( sscanf( line, "ARROW, %lf, %lf, %lf, %lf",
&p0.x, &p0.y, &p1.x, &p1.y ) != 4) {
fprintf( stderr, "SYNTAX: %s", line );
exit (1);
}
a0 = FindAngle( p1, p0 );
fprintf( outf, " { 1, %ld, %ld, %ld, %ld },\n",
(long)(p0.x+0.5), (long)(p0.y+0.5), (long)(p1.x+0.5), (long)(p1.y+0.5) );
Translate( &p1, p0, a0+135, arrowHeadLength );
fprintf( outf, " { 1, %ld, %ld, %ld, %ld },\n",
(long)(p0.x+0.5), (long)(p0.y+0.5), (long)(p1.x+0.5), (long)(p1.y+0.5) );
Translate( &p1, p0, a0-135, arrowHeadLength );
fprintf( outf, " { 1, %ld, %ld, %ld, %ld },\n",
(long)(p0.x+0.5), (long)(p0.y+0.5), (long)(p1.x+0.5), (long)(p1.y+0.5) );
} else if ( strncmp( line, "LINE", 4 ) == 0 ) {
if ( sscanf( line, "LINE, %lf, %lf, %lf, %lf",
&p0.x, &p0.y, &p1.x, &p1.y ) != 4) {
fprintf( stderr, "SYNTAX: %s", line );
exit (1);
}
fprintf( outf, " { 1, %ld, %ld, %ld, %ld },\n",
(long)(p0.x+0.5), (long)(p0.y+0.5), (long)(p1.x+0.5), (long)(p1.y+0.5) );
} else if ( strncmp( line, "STRAIGHT", 8 ) == 0 ) {
if ( sscanf( line, "STRAIGHT, %lf, %lf, %lf, %lf",
&p0.x, &p0.y, &p1.x, &p1.y ) != 4) {
fprintf( stderr, "SYNTAX: %s", line );
exit (1);
}
a0 = FindAngle( p0, p1 );
Translate( &q0, p0, a0+90, trackSeparation/2.0 );
Translate( &q1, p1, a0+90, trackSeparation/2.0 );
fprintf( outf, " { 3, %ld, %ld, %ld, %ld },\n",
(long)(q0.x+0.5), (long)(q0.y+0.5), (long)(q1.x+0.5), (long)(q1.y+0.5) );
Translate( &q0, p0, a0-90, trackSeparation/2.0 );
Translate( &q1, p1, a0-90, trackSeparation/2.0 );
fprintf( outf, " { 3, %ld, %ld, %ld, %ld },\n",
(long)(q0.x+0.5), (long)(q0.y+0.5), (long)(q1.x+0.5), (long)(q1.y+0.5) );
} else if ( strncmp( line, "CURVE", 5 ) == 0 ) {
if ( sscanf( line, "CURVE, %lf, %lf, %lf, %lf, %lf",
&p0.x, &p0.y, &p1.x, &p1.y, &radius ) != 5) {
fprintf( stderr, "SYNTAX: %s", line );
exit (1);
}
a1 = FindCenter( &pc, p0, p1, radius );
a0 = FindAngle( pc, p0 );
/*fprintf(stderr, "A0 = %0.3f, A1 = %0.3f\n", a0, a1 );*/
len = radius * M_PI * 2 * ( a1 / 360.0 );
num = len/20;
if (num < 0) num = - num;
num++;
a1 /= num;
if (radius < 0)
radius = -radius;
for ( j=0; j<num; j++ ) {
/*fprintf( stderr, "A0 = %0.3f\n", a0 );*/
Translate( &p0, pc, a0, radius+trackSeparation/2.0 );
Translate( &p1, pc, a0+a1, radius+trackSeparation/2.0 );
fprintf( outf, " { 3, %ld, %ld, %ld, %ld },\n",
(long)(p0.x+0.5), (long)(p0.y+0.5), (long)(p1.x+0.5), (long)(p1.y+0.5) );
Translate( &p0, pc, a0, radius-trackSeparation/2.0 );
Translate( &p1, pc, a0+a1, radius-trackSeparation/2.0 );
fprintf( outf, " { 3, %ld, %ld, %ld, %ld },\n",
(long)(p0.x+0.5), (long)(p0.y+0.5), (long)(p1.x+0.5), (long)(p1.y+0.5) );
a0 += a1;
p0 = p1;
}
} else {
fprintf( stderr, "SYNTAX2: %s", line );
}
}
}
int main( int argc, char * argv[] )
{
buildDesignerLines( stdin, stdout );
exit(0);
}
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