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/*
xtrkcad_spiro - An adapter for Spiro splines within XtrkCAD.
Copyright (C) XtrkCad.org, based on the Spiro Toolkit of Ralph Levien.
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.
*/
#include "zmisc.h"
#include "common.h"
#include "bezctx.h"
#include "bezctx_xtrkcad.h"
#include "track.h"
#include "tbezier.h"
#include "i18n.h"
#include "math.h"
#include "utility.h"
#define trkSeg(N) DYNARR_N(trkSeg_t,* bc->segsArray, N );
typedef struct {
bezctx base;
dynArr_t * segsArray;
BOOL_T track;
BOOL_T is_open;
BOOL_T has_NAN;
BOOL_T draw_spots;
coOrd last_pos; // For moveTo
int ends[2]; //Start and End knot number
} bezctx_xtrkcad;
static void
bezctx_xtrkcad_moveto(bezctx *z, double x, double y, int is_open) {
bezctx_xtrkcad *bc = (bezctx_xtrkcad *)z;
bc->last_pos.x = x;
bc->last_pos.y = y;
if (!(isfinite(x) && isfinite(y))) {
bc->has_NAN = TRUE;
return;
}
}
static void
bezctx_xtrkcad_lineto(bezctx *z, double x, double y) {
bezctx_xtrkcad *bc = (bezctx_xtrkcad *)z;
if (!(isfinite(x) && isfinite(y))) {
bc->has_NAN = TRUE;
}
if (!bc->is_open || bc->has_NAN) {
bc->last_pos.x = x;
bc->last_pos.y = y;
return;
}
DYNARR_APPEND(trkSeg_t,* bc->segsArray,10);
trkSeg_p seg = &trkSeg(bc->segsArray->cnt-1);
seg->u.l.pos[0].x = bc->last_pos.x;
seg->u.l.pos[0].y = bc->last_pos.y;
seg->u.l.pos[1].x = x;
seg->u.l.pos[1].y = y;
seg->u.l.option = 0;
seg->width = 0.0;
seg->color = wDrawColorBlack;
seg->type = SEG_STRTRK;
if (seg->bezSegs.ptr) MyFree(seg->bezSegs.ptr);
seg->bezSegs.max =0;
seg->bezSegs.cnt = 0;
seg->bezSegs.ptr = NULL;
seg->u.l.angle = FindAngle(seg->u.l.pos[0],seg->u.l.pos[1]);
bc->last_pos.x = x;
bc->last_pos.y = y;
}
static void
bezctx_xtrkcad_quadto(bezctx *z, double x1, double y1, double x2, double y2)
{
bezctx_xtrkcad *bc = (bezctx_xtrkcad *)z;
if ((!isfinite(x1) || !isfinite(y1)
|| !isfinite(x2) || !isfinite(y2))) {
bc->has_NAN = TRUE;
}
if (!bc->is_open || bc->has_NAN) {
bc->last_pos.x = x2;
bc->last_pos.y = y2;
return;
}
DYNARR_APPEND(trkSeg_t,* bc->segsArray,10);
trkSeg_p seg = &trkSeg(bc->segsArray->cnt-1);
seg->u.b.pos[0] = bc->last_pos;
seg->u.b.pos[1].x = x1;
seg->u.b.pos[1].y = y1;
seg->u.b.pos[2].x = x1;
seg->u.b.pos[2].y = y1;
seg->u.b.pos[3].x = x2;
seg->u.b.pos[3].y = y2;
seg->width = 0.0;
seg->color = wDrawColorBlack;
seg->type = SEG_BEZTRK;
if (seg->bezSegs.ptr) MyFree(seg->bezSegs.ptr);
seg->bezSegs.max =0;
seg->bezSegs.cnt = 0;
seg->bezSegs.ptr = NULL;
bc->last_pos.x = x2;
bc->last_pos.y = y2;
FixUpBezierSeg(seg->u.b.pos,seg,bc->track);
}
static void
bezctx_xtrkcad_curveto(bezctx *z, double x1, double y1, double x2, double y2,
double x3, double y3)
{
bezctx_xtrkcad *bc = (bezctx_xtrkcad *)z;
if (!(isfinite(x1) && isfinite(y1)
&& isfinite(x2) && isfinite(y2)
&& isfinite(x3) && isfinite(y3))) {
bc->has_NAN = TRUE;
}
if (!bc->is_open || bc->has_NAN) {
bc->last_pos.x = x3;
bc->last_pos.y = y3;
return;
}
DYNARR_APPEND(trkSeg_t,* bc->segsArray,10);
trkSeg_p seg = &trkSeg(bc->segsArray->cnt-1);
seg->u.b.pos[0].x = bc->last_pos.x;
seg->u.b.pos[0].y = bc->last_pos.y;
seg->u.b.pos[1].x = x1;
seg->u.b.pos[1].y = y1;
seg->u.b.pos[2].x = x2;
seg->u.b.pos[2].y = y2;
seg->u.b.pos[3].x = x3;
seg->u.b.pos[3].y = y3;
seg->width = 0.0;
seg->color = wDrawColorBlack;
seg->type = SEG_BEZTRK;
if (seg->bezSegs.ptr) MyFree(seg->bezSegs.ptr);
seg->bezSegs.max = 0;
seg->bezSegs.cnt = 0;
seg->bezSegs.ptr = NULL;
bc->last_pos.x = x3;
bc->last_pos.y = y3;
FixUpBezierSeg(seg->u.b.pos,seg,bc->track);
if (bc->draw_spots) {
DYNARR_APPEND(trkSeg_t,* bc->segsArray,10);
seg = &trkSeg(bc->segsArray->cnt-1);
seg->type=SEG_FILCRCL;
seg->u.c.center.x = bc->last_pos.x;
seg->u.c.center.y = bc->last_pos.y;
seg->u.c.radius = 0.25;
seg->width = 0.0;
seg->color = wDrawColorBlack;
}
}
void
bezctx_xtrkcad_mark_knot(bezctx *z, int knot_idx) {
bezctx_xtrkcad *bc = (bezctx_xtrkcad *)z;
if (knot_idx >= bc->ends[0]) bc->is_open = TRUE; //Only worry about segs inside our gap
if (knot_idx >= bc->ends[1]) bc->is_open = FALSE;
}
bezctx *
new_bezctx_xtrkcad(dynArr_t * segArray, int ends[2], BOOL_T spots) {
bezctx_xtrkcad *result = znew(bezctx_xtrkcad, 1);
result->segsArray = segArray;
result->ends[0] = ends[0];
result->ends[1] = ends[1];
result->base.moveto = bezctx_xtrkcad_moveto;
result->base.lineto = bezctx_xtrkcad_lineto;
result->base.quadto = bezctx_xtrkcad_quadto;
result->base.curveto = bezctx_xtrkcad_curveto;
result->base.mark_knot = bezctx_xtrkcad_mark_knot;
result->is_open = FALSE;
result->has_NAN = FALSE;
result->draw_spots = spots;
result->track = TRUE;
return &result->base;
}
BOOL_T bezctx_xtrkcad_close(bezctx *z) {
bezctx_xtrkcad *bc = (bezctx_xtrkcad *)z;
if (bc->has_NAN) return FALSE;
return TRUE;
}
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