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-rw-r--r--app/lib/params/nmra-to.c272
1 files changed, 272 insertions, 0 deletions
diff --git a/app/lib/params/nmra-to.c b/app/lib/params/nmra-to.c
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--- /dev/null
+++ b/app/lib/params/nmra-to.c
@@ -0,0 +1,272 @@
+/*
+ * $Header: /home/dmarkle/xtrkcad-fork-cvs/xtrkcad/app/lib/params/nmra-to.c,v 1.5 2008-06-09 19:34:06 m_fischer Exp $
+ */
+
+/* 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 <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <math.h>
+#ifndef WINDOWS
+#include <unistd.h>
+#else
+#define M_PI 3.14159265358979323846
+#define strncasecmp strnicmp
+#endif
+#include <stdlib.h>
+
+#define DELIMITER " \t\r\n"
+#define BUFSIZE 1024
+
+#define SIN(A) sin(D2R(A))
+#define COS(A) cos(D2R(A))
+#define TAN(A) tan(D2R(A))
+
+typedef struct { /* a co-ordinate */
+ double x;
+ double y;
+ } coOrd;
+
+double normalizeAngle( double angle )
+/* make sure <angle> is >= 0.0 and < 360.0 */
+{
+ while (angle<0) angle += 360.0;
+ while (angle>=360) angle -= 360.0;
+ return angle;
+}
+
+double D2R( double angle )
+/* convert degrees to radians: for trig functions */
+{
+ return angle/180.0 * M_PI;
+}
+
+double R2D( double R )
+/* concert radians to degrees */
+{
+ return normalizeAngle( R * 360.0 / (M_PI*2) );
+}
+
+
+double findDistance( coOrd p0, coOrd p1 )
+/* find distance between two points */
+{
+ double dx = p1.x-p0.x, dy = p1.y-p0.y;
+ return sqrt( dx*dx + dy*dy );
+}
+
+int small(double v )
+/* is <v> close to 0.0 */
+{
+ return (fabs(v) < 0.0001);
+}
+
+double findAngle( coOrd p0, coOrd p1 )
+/* find angle between two points */
+{
+ double dx = p1.x-p0.x, dy = p1.y-p0.y;
+ if (small(dx)) {
+ if (dy >=0) return 0.0;
+ else return 180.0;
+ }
+ if (small(dy)) {
+ if (dx >=0) return 90.0;
+ else return 270.0;
+ }
+ return R2D(atan2( dx,dy ));
+}
+
+
+/* description of a curve */
+typedef struct {
+ char type;
+ coOrd pos[2];
+ double radius, a0, a1;
+ coOrd center;
+ } line_t;
+
+
+void translate( coOrd *res, coOrd orig, double a, double d )
+{
+ res->x = orig.x + d * sin( D2R(a) );
+ res->y = orig.y + d * cos( D2R(a) );
+}
+
+
+static void computeCurve( coOrd pos0, coOrd pos1, double radius, coOrd * center, double * a0, double * a1 )
+/* translate between curves described by 2 end-points and a radius to
+ a curve described by a center, radius and angles.
+*/
+{
+ double d, a, aa, aaa, s;
+
+ d = findDistance( pos0, pos1 )/2.0;
+ a = findAngle( pos0, pos1 );
+ s = fabs(d/radius);
+ if (s > 1.0)
+ s = 1.0;
+ aa = R2D(asin( s ));
+ if (radius > 0) {
+ aaa = a + (90.0 - aa);
+ *a0 = normalizeAngle( aaa + 180.0 );
+ translate( center, pos0, aaa, radius );
+ } else {
+ aaa = a - (90.0 - aa);
+ *a0 = normalizeAngle( aaa + 180.0 - aa *2.0 );
+ translate( center, pos0, aaa, -radius );
+ }
+ *a1 = aa*2.0;
+}
+
+
+double X( double v )
+{
+ if ( -0.000001 < v && v < 0.000001 )
+ return 0.0;
+ else
+ return v;
+}
+
+double getval( char * arg )
+{
+ char *cp;
+ double a,b,c;
+ a = strtod( arg, &cp );
+ if (*cp == '.')
+ return atof( arg );
+ if (*cp == '\0')
+ return a;
+ if (*cp == '/') {
+ c = strtod( cp+1, &arg );
+ return a/c;
+ }
+ if (*cp != '-') {
+ fprintf( stderr, "expected '-': %s\n", arg );
+ exit(1);
+ }
+ b = strtod( cp+1, &arg );
+ if (*arg != '/') {
+ fprintf( stderr, "expected '/': %s\n", cp );
+ exit(1);
+ }
+ c = strtod( arg+1, &cp );
+ return a + b/c;
+}
+
+
+int main ( int argc, char * argv[] )
+/* main: handle options, open files */
+{
+ double tg, pr, l, crr, fa, tl, hl, t;
+ char * scale;
+ char * desc;
+ double a10, a11, a20, a21;
+ coOrd q0, q1, q2, q3, q1c, q2c;
+
+ char *buffer = malloc( BUFSIZE );
+ FILE *fIn, *fOut;
+
+ q0.x = q0.y = 0.0;
+
+ if( argc != 3 )
+ {
+ fprintf( stderr,
+ "Usage: %1 nmraturnoutdata paramfile\n\n"
+ "The data file is read line by line and turnout defimitions\n"
+ "are created in the param file.\n\n",
+ argv[ 0 ] );
+ exit( 1 );
+ }
+
+ fIn = fopen( argv[ 1 ], "r" );
+ if( !fIn ) {
+ fprintf( stderr, "Could not open the definition %s\n", argv[ 1 ] );
+ exit( 1 );
+ }
+
+ fOut = fopen( argv[ 2 ], "w" );
+ if( !fOut ) {
+ fprintf( stderr, "Could not create the structures in %s\n", argv[ 2 ] );
+ exit( 1 );
+ }
+
+ if( fgets( buffer, BUFSIZE, fIn ))
+ {
+ printf( "Creating %s\n", buffer + strlen("CONTENTS " ) );
+ fputs( buffer, fOut );
+ }
+ while(fgets(buffer, BUFSIZE, fIn ))
+ {
+ if( buffer[ 0 ] == '#' ) {
+ fputs( buffer, fOut );
+ continue;
+ }
+
+ scale = strtok( buffer, DELIMITER );
+ desc = strtok( NULL, DELIMITER );
+ tg = atof(strtok( NULL, DELIMITER ));
+ q1.x = getval(strtok( NULL, DELIMITER ));
+ q1.y = getval(strtok( NULL, DELIMITER ));
+ pr = getval(strtok( NULL, DELIMITER ));
+ l = getval(strtok( NULL, DELIMITER ));
+ crr = getval(strtok( NULL, DELIMITER ));
+ fa = getval(strtok( NULL, DELIMITER ));
+ tl = getval(strtok( NULL, DELIMITER ));
+ hl = getval(strtok( NULL, DELIMITER ));
+
+ t = floor(fa);
+ fa = t + (fa-t)/60*100;
+
+ q2.x = l-tl;
+ q2.y = tg-tl*TAN(fa);
+ q3.x = l+hl;
+ q3.y = tg+hl*SIN(fa);
+ computeCurve( q0, q1, -pr, &q1c, &a10, &a11 );
+ computeCurve( q1, q2, -crr, &q2c, &a20, &a21 );
+
+ fprintf( fOut, "#NMRA-Std TO %0.3f %0.3f %0.3f %0.3f %0.3f %0.3f %0.3f %0.3f\n",
+ q1.x, q1.y, pr, l, crr, fa, tl, hl );
+
+ fprintf( fOut, "TURNOUT %s \"NMRA %s\t#%s Right\t%sR\"\n", scale, scale, desc, desc);
+ fprintf( fOut, "\tP \"Normal\" 1\n");
+ fprintf( fOut, "\tP \"Reverse\" 2 3 4\n");
+ fprintf( fOut, "\tE 0.000000 0.000000 270.000000\n");
+ fprintf( fOut, "\tE %0.6f 0.000000 90.000000\n", l+hl);
+ fprintf( fOut, "\tE %0.6f %0.6f %0.6f\n", q3.x, -q3.y, 90.0+fa);
+ fprintf( fOut, "\tS 0 0 0.000000 0.000000 %0.6f 0.000000\n", l+hl);
+ fprintf( fOut, "\tC 0 0 %0.6f %0.6f %0.6f %0.6f %0.6f\n", pr, q1c.x, -q1c.y, normalizeAngle(180-a10-a11), a11 );
+ fprintf( fOut, "\tC 0 0 %0.6f %0.6f %0.6f %0.6f %0.6f\n", crr, q2c.x, -q2c.y, normalizeAngle(180-a20-a21), a21 );
+ fprintf( fOut, "\tS 0 0 %0.6f %0.6f %0.6f %0.6f\n", q2.x, -q2.y, q3.x, -q3.y );
+ fprintf( fOut, "\tEND\n");
+
+ fprintf( fOut, "TURNOUT %s \"NMRA %s\t#%s Left\t%sL\"\n", scale, scale, desc, desc);
+ fprintf( fOut, "\tP \"Normal\" 1\n");
+ fprintf( fOut, "\tP \"Reverse\" 2 3 4\n");
+ fprintf( fOut, "\tE 0.000000 0.000000 270.000000\n");
+ fprintf( fOut, "\tE %0.6f 0.000000 90.000000\n", l+hl);
+ fprintf( fOut, "\tE %0.6f %0.6f %0.6f\n", q3.x, q3.y, 90.0-fa);
+ fprintf( fOut, "\tS 0 0 0.000000 0.000000 %0.6f 0.000000\n", l+hl);
+ fprintf( fOut, "\tC 0 0 %0.6f %0.6f %0.6f %0.6f %0.6f\n", -pr, q1c.x, q1c.y, a10, a11 );
+ fprintf( fOut, "\tC 0 0 %0.6f %0.6f %0.6f %0.6f %0.6f\n", -crr, q2c.x, q2c.y, a20, a21 );
+ fprintf( fOut, "\tS 0 0 %0.6f %0.6f %0.6f %0.6f\n", q2.x, q2.y, q3.x, q3.y );
+ fprintf( fOut, "\tEND\n");
+ }
+ exit(0);
+}
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