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S52CS.c
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S52CS.c
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// S52CS.c : Conditional Symbologie procedure 3.2 (CS)
//
// Project: OpENCview
/*
This file is part of the OpENCview project, a viewer of ENC.
Copyright (C) 2000-2018 Sylvain Duclos sduclos@users.sourceforge.net
OpENCview is free software: you can redistribute it and/or modify
it under the terms of the Lesser GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OpENCview 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
Lesser GNU General Public License for more details.
You should have received a copy of the Lesser GNU General Public License
along with OpENCview. If not, see <http://www.gnu.org/licenses/>.
*/
// Note: remarks commenting each CS are extracted from pslb03_2.pdf (sec. 12)
#include "S52CS.h"
#include "S52MP.h" // S52_MP_get/set()
#include "S52utils.h" // PRINTF(), S52_atof(), S52_atoi(), CCHAR
#include <math.h> // floor()
#define version "3.2.0" // CS of Plib 3.2 S52 ed ?
#define UNKNOWN_DEPTH -1000.0 // depth of 1km above sea level
// loadCell() - keep ref on S57_geo for further proccessing in CS
typedef struct _localObj {
GPtrArray *lights_list; // list of: LIGHTS
GPtrArray *topmar_list; // list of: LITFLT, LITVES, BOY???; to find floating platform
GPtrArray *depcnt_list; // list of: DEPARE:A, DRGARE:A used by CS(DEPCNT02)
GPtrArray *udwhaz_list; // list of: DEPARE:A/L and DRGARE:A used by CS(_UDWHAZ03)
GPtrArray *depval_list; // list of geo used by CS(_DEPVAL01) (via OBSTRN04, WRECKS02)
} _localObj;
// Note: seem useless S52 specs -- no effect !?
//GPtrArray *rigid_list; // rigid platform
// size of attributes value list buffer
#define LISTSIZE 16 // list size
#ifdef S52_DEBUG
#include <assert.h>
#define _g_string_new(var,str) (NULL==var) ? g_string_new(str) : (assert(0),(GString*)0);
#else
#define _g_string_new(var,str) g_string_new(str);
#endif // S52_DEBUG
//#define _g_string_free(var,freeSeg) var=(NULL==var) ? NULL : (g_string_free(var,freeSeg),NULL) // will fail if freeSeg=FALSE
#define _g_string_free(var,_) var=(NULL==var) ? NULL : (g_string_free(var,TRUE),NULL) // freeSeg TRUE (str not returned)
static char *_strpbrk(const char *s, const char *list)
{
const char *p;
const char *r;
if (NULL==s || NULL==list) return NULL;
for (r=s; *r; r++)
for (p = list; *p; p++)
if (*r == *p)
return (char *)r;
return NULL;
}
static int _parseList(const char *str, char *buf)
// Put a string of comma delimited number in an array (buf).
// Return: the number of value in buf.
// Assume: - number < 256,
// - list size less then LISTSIZE-1 .
// Note: buf is \0 terminated for _strpbrk().
// FIXME: use g_strsplit_set() instead!
{
int i = 0;
if (NULL != str && *str != '\0') {
do {
if ( i>= LISTSIZE-1) {
PRINTF("WARNING: value in list lost!!\n");
break;
}
buf[i++] = (unsigned char) S52_atoi(str);
// skip digit
while('0'<=*str && *str<='9')
str++;
} while(*str++ != '\0'); // skip ',' or exit
}
buf[i] = '\0';
return i;
}
CCHAR *S52_CS_version(void)
{
return version;
}
localObj *S52_CS_init (void)
{
_localObj *local = g_new0(_localObj, 1);
//_localObj *local = g_try_new0(_localObj, 1);
if (NULL == local)
g_assert(0);
local->lights_list = g_ptr_array_new();
local->topmar_list = g_ptr_array_new();
local->depcnt_list = g_ptr_array_new();
local->udwhaz_list = g_ptr_array_new();
local->depval_list = g_ptr_array_new();
return local;
}
localObj *S52_CS_done (_localObj *local)
{
return_if_null(local);
// ref only - obj allready deleted
g_ptr_array_free(local->lights_list, TRUE);
g_ptr_array_free(local->topmar_list, TRUE);
g_ptr_array_free(local->depcnt_list, TRUE);
g_ptr_array_free(local->udwhaz_list, TRUE);
g_ptr_array_free(local->depval_list, TRUE);
local->lights_list = NULL;
local->topmar_list = NULL;
local->depcnt_list = NULL;
local->udwhaz_list = NULL;
local->depval_list = NULL;
g_free(local);
return NULL;
}
int S52_CS_add (_localObj *local, S57_geo *geo)
// return TRUE
{
return_if_null(local);
return_if_null(geo);
const char *name = S57_getName(geo);
///////////////////////////////////////////////
// for LIGHTS05
//
// set floating platform
if ((0==g_strcmp0(name, "LITFLT")) ||
(0==g_strcmp0(name, "LITVES")) ||
(0==strncmp (name, "BOY", 3)))
{
g_ptr_array_add(local->topmar_list, (gpointer) geo);
return TRUE;
}
// Note: seem useless S52 specs -- no effect !?
// set rigid platform
//if (0 == g_strcmp0(name, "BCN", 3))
// g_ptr_array_add(local->rigid_list, (gpointer) geo);
// set light object
if (0 == g_strcmp0(name, "LIGHTS")) {
// Note: order of S57ID are preserved (ID1 < ID2 < ID3 ..)
g_ptr_array_add(local->lights_list, (gpointer) geo);
return TRUE;
}
///////////////////////////////////////////////
// 1 - for DEPCNT02: build ref to group 1 DEPARE:A and DRGARE:A (depcnt_list)
// Note: the Nassi graph say to loop AREA of DEPARE and DRGARE
//
// 2 - for _UDWHAZ03 (via OBSTRN04, WRECKS02)
// build ref to group 1 DEPARE:A/L and DRGARE:A (udwhaz_list)
if ((0==g_strcmp0(name, "DEPARE")) || // LINE/AREA:
(0==g_strcmp0(name, "DRGARE")) // AREA:
)
{
// DEPARE:A/L and DRGARE:A
g_ptr_array_add(local->udwhaz_list, (gpointer) geo);
// DEPARE:A and DRGARE:A
if (S57_AREAS_T == S57_getObjtype(geo)) {
g_ptr_array_add(local->depcnt_list, (gpointer) geo);
}
}
///////////////////////////////////////////////
// for _DEPVAL01 (via OBSTRN04, WRECKS02)
if ((0==g_strcmp0(name, "DEPARE")) || // LINE/AREA:
(0==g_strcmp0(name, "UNSARE")) // AREA:
)
{
// DEPARE:A/L and UNSARE:A
g_ptr_array_add(local->depval_list, (gpointer) geo);
}
return TRUE;
}
int S52_CS_touch(_localObj *local, S57_geo *geo)
// compute witch geo object of this cell "touch" this one (geo)
// return TRUE
{
// useless - rbin
//return_if_null(local);
//return_if_null(geo);
const char *name = S57_getName(geo);
////////////////////////////////////////////
// floating object
if (0 == g_strcmp0(name, "TOPMAR")) {
for (guint i=0; i<local->topmar_list->len; ++i) {
S57_geo *other = (S57_geo *) g_ptr_array_index(local->topmar_list, i);
// skip if not at same position
if (FALSE == S57_cmpGeoExt(geo, other))
continue;
if (NULL == S57_getTouchTOPMAR(geo)) {
S57_setTouchTOPMAR(geo, other);
// bailout as soon as we got one - this assume that there at most 1 topmar!
//break;
} else {
static int silent = FALSE;
if (FALSE == silent) {
PRINTF("FIXME: more than 1 TOPMAR\n");
PRINTF("FIXME: (this msg will not repeat)\n");
silent = TRUE;
g_assert(0);
}
}
}
// finish
return TRUE;
}
////////////////////////////////////////////
// experimental:
// check if this buoy has a lights
if (0 == g_strcmp0(name, "BOYLAT")) {
for (guint i=0; i<local->lights_list->len; ++i) {
S57_geo *light = (S57_geo *) g_ptr_array_index(local->lights_list, i);
// skip if this light is not at buoy's position
if (FALSE == S57_cmpGeoExt(geo, light))
continue;
// debug
if (NULL != S57_getTouchLIGHTS(light)) {
static int silent = FALSE;
if (FALSE == silent) {
PRINTF("FIXME: A) more than 1 LIGHT for the same BOYLAT\n");
PRINTF("FIXME: (this msg will not repeat)\n");
silent = TRUE;
}
}
// reverse chaining
S57_setTouchLIGHTS(light, geo);
// bailout as soon as we got one
break;
}
return TRUE;
}
////////////////////////////////////////////
// LIGHTS05:sector
// chaine light at same position
if (0 == g_strcmp0(name, "LIGHTS")) {
for (guint i=0; i<local->lights_list->len; ++i) {
S57_geo *candidate = (S57_geo *) g_ptr_array_index(local->lights_list, i);
// skip if allready processed / same LIGHTS
if (S57_getS57ID(candidate) <= S57_getS57ID(geo))
continue;
// skip if not at same position
if (FALSE == S57_cmpGeoExt(geo, candidate))
continue;
// chaine lights
if (NULL == S57_getTouchLIGHTS(geo)) {
S57_setTouchLIGHTS(geo, candidate);
// bailout as soon as we get one
break; // debug - comment this to scan all lights
} else {
// parano
PRINTF("FIXME: chaining prob.: more than 1 LIGHT touch this LIGHT\n");
g_assert(0);
}
}
// finish
return TRUE;
}
//////////////////////////////////////////////
// DEPCNT02
// DEPCNT:L, DEPARE:L call CS(DEPCNT02)
// depcnt_list: a set of DEPARE:A and DRGARE:A
// Note: S52 has no ordering of depcnt_list, so all candite are checked
if ((0==g_strcmp0(name, "DEPCNT")) || // LINE
(0==g_strcmp0(name, "DEPARE") && S57_LINES_T==S57_getObjtype(geo)) // LINE, AREA (www.s57.com 2017 say AREA only)
)
{
// Note: depcnt_list is used by _DEPCNT02_isSC() only when the requested SC is not in the ENC
// and need to select the next deeper line available in the ENC
//
// --- deeper -->
//
// | SC requested by Mariners'
//
// | | | edge/line available in the ENC
//
// ..+-------+-------+..
// | A | B | area (made of edge)
// ..+-------+-------+..
//
// | SC edge selected by _DEPCNT02_isSC()
// find the shallowest area that share this edge
double drvalmin = -UNKNOWN_DEPTH; // 1000 m bellow surface
guint npt;
double *ppt;
if (FALSE == S57_getGeoData(geo, 0, &npt, &ppt)) {
g_assert(0);
return FALSE;
}
// Note: a line segment is made of edge primtive (CN - EN - .. - EN - CN)
// the first node (CN) is at the intersection off line in the flat graph
if (2 < npt)
ppt += 3; // take the first EN
// select the next deeper contour as the safety contour
// when the contour requested is not in the ENC
for (guint i=0; i<local->depcnt_list->len; ++i) {
S57_geo *candidate = (S57_geo *) g_ptr_array_index(local->depcnt_list, i);
// skip if it's same S57 object (DEPARE)
if (S57_getS57ID(geo) == S57_getS57ID(candidate))
continue;
if (FALSE == S57_cmpGeoExt(geo, candidate))
continue;
if (FALSE == S57_isPtInSet(candidate, ppt[0], ppt[1]))
continue;
//
// this line do share edge with the candidate area
//
// select the shallowest area for later _DEPCNT_isSC() test DRVAL1 < SC
// DRVAL1 mandatory DEPARE:A and DRGARE:A
GString *can_drval1str = S57_getAttVal(candidate, "DRVAL1");
double can_drval1 = (NULL==can_drval1str) ? 0.0 : S52_atof(can_drval1str->str);
if (can_drval1 < drvalmin) {
drvalmin = can_drval1;
S57_setTouchDEPCNT(geo, candidate);
// this shouldn't make any diff since these is no order in depcnt_list
//return;
}
} // for
return TRUE;
}
////////////////////////////////////////
// _UDWHAZ03 (via OBSTRN04, WRECKS02)
// OBSTRN:A/L/P call OBSTRN04
// UWTROC:P call OBSTRN04
// WRECKS:A/P call WRECKS02
// and in turn, call _UDWHAZ03 to find out if a DEPARE:A/L and DGRARE:A is deeper than the safety contour
if ((0==g_strcmp0(name, "OBSTRN")) ||
(0==g_strcmp0(name, "UWTROC")) ||
(0==g_strcmp0(name, "WRECKS"))
)
{
guint npt;
double *ppt;
if (FALSE == S57_getGeoData(geo, 0, &npt, &ppt))
return FALSE;
// Note: a line segment is made of edge primtive (CN - EN - .. - EN - CN)
// the first node (CN) is at the intersection off line in the flat graph
if (2 < npt)
ppt += 3; // take the first EN
// find the deepest group 1 under this geo
//double depth_max = 0.0;
double depth_max = UNKNOWN_DEPTH;
for (guint i=0; i<local->udwhaz_list->len; ++i) {
// list of DEPARE:L/A and DRGARE:A
S57_geo *candidate = (S57_geo *) g_ptr_array_index(local->udwhaz_list, i);
// skip if not overlapping
if (FALSE == S57_cmpGeoExt(geo, candidate))
continue;
//
// is geo touching this candidate?
//
// geo point (IsolatedNode)
if (S57_POINT_T == S57_getObjtype(geo)) {
// candidate line
if (S57_LINES_T == S57_getObjtype(candidate)) {
if (FALSE == S57_isPtOnLine(candidate, ppt[0], ppt[1]))
continue;
} else {
// candidate area
if (FALSE == S57_isPtInArea(candidate, ppt[0], ppt[1])) {
continue;
}
}
} else {
// geo:A/L, candidate:A/L
if (FALSE == S57_isPtInSet(candidate, ppt[0], ppt[1]))
continue;
}
//
// geo do touch this candidate
//
// debug - then link to it as default
//S57_setTouchUDWHAZ(geo, candidate);
//get depth_max
if (S57_LINES_T == S57_getObjtype(candidate)) {
// DEPARE:L use DRVAL2 (not in UDWHAZ04)
GString *drval2str = S57_getAttVal(candidate, "DRVAL2");
if (NULL != drval2str) {
double drval2 = S52_atof(drval2str->str);
if (drval2 > depth_max) {
depth_max = drval2;
S57_setTouchUDWHAZ(geo, candidate);
}
}
} else {
// DEPARE:A and DRGARE:A use DRVAL1
// If there is no explicit value, go to the next object because we
// consider, empty DRVAL1 is always less SAFETY_CONTOUR
GString *drval1str = S57_getAttVal(candidate, "DRVAL1");
if (NULL != drval1str) {
double drval1 = S52_atof(drval1str->str);
if (drval1 > depth_max) {
depth_max = drval1;
S57_setTouchUDWHAZ(geo, candidate);
}
//else {
// PRINTF("DEBUG: group 1 candidate DRVAL1=%s under this: %s:%c:%i\n", drval1str->str, name, S57_getObjtype(geo), S57_getS57ID(geo));
//}
}
//else {
// PRINTF("DEBUG: group 1 candidate has no DRVAL1 value under this: %s:%c:%i\n", name, S57_getObjtype(geo), S57_getS57ID(geo));
//}
}
} // for loop
// FIXME: how to handle geo sans candidate - no DRVAL1 or DRVAL2 !!
if (NULL == S57_getTouchUDWHAZ(geo)) {
PRINTF("DEBUG: no group 1 candidate under this: %s:%c:%i\n", name, S57_getObjtype(geo), S57_getS57ID(geo));
}
}
//////////////////////////////////////
// _DEPVAL01
// OBSTRN:A/L/P call OBSTRN04
// UWTROC:P call OBSTRN04
// WRECKS:A/P call WRECKS02
// in turn call _DEPVAL01 to find the geo oject of 'least_depht'
if ((0==g_strcmp0(name, "OBSTRN")) ||
(0==g_strcmp0(name, "UWTROC")) ||
(0==g_strcmp0(name, "WRECKS"))
)
{
guint npt;
double *ppt;
if (FALSE == S57_getGeoData(geo, 0, &npt, &ppt))
return FALSE;
// Note: a line segment is made of edge primtive (CN - EN - .. - EN - CN)
// the first node (CN) is at the intersection off line in the flat graph
if (2 < npt)
ppt += 3; // take the first EN
//double least_depth = INFINITY;
double least_depth = UNKNOWN_DEPTH;
for (guint i=0; i<local->depval_list->len; ++i) {
S57_geo *candidate = (S57_geo *) g_ptr_array_index(local->depval_list, i);
// skip if extent not overlapping
if (FALSE == S57_cmpGeoExt(geo, candidate))
continue;
//
// is geo touching this candidate?
//
// geo:P (IsolatedNode)
if (S57_POINT_T == S57_getObjtype(geo)) {
// candidate:L
if (S57_LINES_T == S57_getObjtype(candidate)) {
S57_isPtOnLine(candidate, ppt[0], ppt[1]);
}
// candidate:A
if (FALSE ==S57_isPtInArea(candidate, ppt[0], ppt[1])) {
continue;
}
} else {
// geo:A/L, candidate:A/L
if (FALSE == S57_isPtInSet(candidate, ppt[0], ppt[1]))
continue;
}
//
// geo do touch this candidate
//
// first check if UNSARE
if (0 == g_strcmp0(S57_getName(candidate), "UNSARE")) {
S57_setTouchDEPVAL(geo, candidate);
PRINTF("DEBUG: UNSARE found value under this: %s:%c:%i\n", name, S57_getObjtype(geo), S57_getS57ID(geo));
g_assert(0);
break; // bailout - no need to search further
}
S57_geo *crntmin = S57_getTouchDEPVAL(geo);
if (NULL == crntmin) {
S57_setTouchDEPVAL(geo, candidate);
} else {
GString *drval1str = S57_getAttVal(candidate, "DRVAL1");
if (NULL == drval1str)
continue;
double drval1 = S52_atof(drval1str->str);
//if (isinf(least_depth)) {
if (UNKNOWN_DEPTH == least_depth) {
least_depth = drval1;
S57_setTouchDEPVAL(geo, candidate);
}
if (drval1 < least_depth) {
//if (least_depth < drval1 ) {
continue;
} else {
least_depth = drval1;
S57_setTouchDEPVAL(geo, candidate);
}
}
} // for loop
// FIXME: how to handle geo sans candidate - no DRVAL1 or DRVAL2 !!
if (NULL == S57_getTouchDEPVAL(geo)) {
PRINTF("DEBUG: no group 1 candidate under this: %s:%c:%i\n", name, S57_getObjtype(geo), S57_getS57ID(geo));
}
}
return TRUE;
}
static GString *CLRLIN01 (S57_geo *geo)
// Remarks: A clearing line shows a single arrow head at one of its ends. The direction
// of the clearing line must be calculated from its line object in order to rotate
// the arrow head symbol and place it at the correct end. This cannot be
// achieved with a complex linestyle since linestyle symbols cannot be sized
// to the length of the clearing line. Instead a linestyle with a repeating pattern
// of arrow symbols had to be used which does not comply with the required
// symbolization.
{
GString *clrlin01 = _g_string_new(NULL, ";SY(CLRLIN01);LS(SOLD,1,NINFO)");
GString *catclrstr = S57_getAttVal(geo, "catclr");
if (NULL != catclrstr) {
//if '0' : txt undefined
// NMT
if ('1' == *catclrstr->str) {
g_string_append(clrlin01, ";TX('NMT',2,1,2,'15110',-1,-1,CHBLK,51)");
}
// NLT
if ('2' == *catclrstr->str) {
g_string_append(clrlin01, ";TX('NLT',2,1,2,'15110',-1,-1,CHBLK,51)");
}
}
return clrlin01;
}
static GString *DATCVR01 (S57_geo *geo)
// Remarks: This conditional symbology procedure describes procedures for:
// - symbolizing the limit of ENC coverage;
// - symbolizing navigational purpose boundaries ("scale boundarie"); and
// - indicating overscale display.
//
// Note that the mandatory meta object M_QUAL:CATQUA is symbolized by the look-up table.
//
// Because the methods adopted by an ECDIS to meet the IMO and IHO requirements
// listed on the next page will depend on the manufacturer's software, and cannot be
// described in terms of a flow chart in the same way as other conditional procedures,
// this procedure is in the form of written notes.
{
// Note: this CS apply to object M_COVR and M_CSCL
GString *datcvr01 = _g_string_new(NULL, NULL);
///////////////////////
// 1 - REQUIREMENT
// (IMO/IHO specs. explenation)
///////////////////////
// 2 - ENC COVERAGE
//
// 2.1 - Limit of ENC coverage
// CSG union of all M_COVR:CATCOV=1
if (0 == g_strcmp0(S57_getName(geo), "M_COVR")) {
/* Note: M_COVR/CATCOV= 1 or 2 distiction is now maid in S52.c:_app()
GString *catcovstr = S57_getAttVal(geo, "CATCOV");
if ((NULL!=catcovstr) && ('1'==*catcovstr->str)) {
// M_COVR:CATCOV=1, link to PLib AUX 'm_covr'
// Note: this rule apply to the final union poly
// not to individual S57 object
datcvr01 = g_string_new(";OP(3OD11060);LC(HODATA01)");
} else {
// M_COVR:CATCOV=2, link to PLib 'M_COVR'
// LUPT 40LU00102NILM_COVRA00001SPLAIN_BOUNDARIES
// LUPT 45LU00357NILM_COVRA00001SSYMBOLIZED_BOUNDARIES
datcvr01 = g_string_new(";LC(HODATA01)");
}
//*/
//datcvr01 = g_string_new(";LC(HODATA01)");
datcvr01 = g_string_append(datcvr01, ";LC(HODATA01)");
return datcvr01;
}
// 2.2 - No data areas
// FIXME: This can be done outside of CS (ie when clearing the screen)
// FIXME: ";OP(0OD11050);AC(NODATA);AP(NODATA)"
// FIXME: set geo to cover earth (!)
//////////////////////
// 3 - SCALE BOUNDARIES
//
// 3.1 - Chart scale boundaties
// FIXME: use Data Set IDentification field,
// intended usage (navigational purpose) (DSID,INTU)
//if (0 == g_strcmp0(S57_getName(geo), "DSID")) { // not reached
if (0 == g_strcmp0(S57_getName(geo), "M_COVR")) {
//GString *intustr = S57_getAttVal(geo, "INTU");
//g_string_append(datcvr01, ";OP(3OS21030);LS(SOLD,1,CHGRD)");
// -OR-
//g_string_append(datcvr01, ";OP(3OS21030);LC(SCLBDYnn)");
PRINTF("DEBUG: M_COVR found\n");
g_assert(0);
}
// 3.2 - Graphical index of navigational purpose
// FIXME: draw extent of available SENC in DB (CATALOG)
// -OR- client job! do libS52.so only render cell?
//////////////////////
// 4 - OVERSCALE
//
// FIXME: get metadata CSCL of DSPM field
// FIXME: get object M_CSCL or CSCALE
// in gdal is named:
// DSID:DSPM_CSCL (Data Set ID - metadata)
// M_CSCL:CSCALE
if (0 == g_strcmp0(S57_getName(geo), "M_CSCL")) {
PRINTF("FIXME: overscale M_CSCL not computed\n");
return datcvr01;
}
//
// 4.1 - Overscale indication
// FIXME: compute, scale = [denominator of the compilation scale] / [denominator of the display scale]
// FIXME: draw overscale indication (ie TX("X%3.1f",scale))
// color SCLBR, display base
//
// 4.2 - Ovescale area at a chart scale boundary
// FIXME: to put on STANDARD DISPLAY but this object
// is on DISPLAYBASE in section 2
//g_string_append(datcvr01, ";OP(3OS21030);AP(OVERSC01)");
//
// 4.3 - Larger scale data available
// FIXME: display indication of better scale available (?)
// FIXME
static int silent = FALSE;
if (FALSE == silent) {
PRINTF("NOTE: DATCVR01/OVERSCALE not computed\n");
PRINTF("NOTE: (this msg will not repeat)\n");
silent = TRUE;
}
return datcvr01;
}
static GString *DATCVR02 (S57_geo *geo)
{
static int silent = FALSE;
if (FALSE == silent) {
PRINTF("FIXME: CS(DATCVR02) switch to CS(DATCVR01)\n");
PRINTF("FIXME: (this msg will not repeat)\n");
silent = TRUE;
}
return DATCVR01(geo);
}
static GString *_SEABED01(double drval1, double drval2);
//static GString *_RESCSP01(S57_geo *geo);
static GString *_RESCSP01(GString *restrn01str);
static GString *DEPARE01 (S57_geo *geo)
// Remarks: An object of the class "depth area" is coloured and covered with fill patterns
// according to the mariners selections of shallow contour, safety contour and
// deep contour. This requires a decision making process provided by the sub-procedure
// "SEABED01" which is called by this symbology procedure.
// Objects of the class "dredged area" are handled by this routine as well to
// ensure a consistent symbolization of areas that represent the surface of the
// seabed.
{
GString *depare01 = NULL;
//int objl = 0;
//GString *objlstr = NULL;
GString *drval1str = S57_getAttVal(geo, "DRVAL1");
double drval1 = (NULL == drval1str) ? -1.0 : S52_atof(drval1str->str);
GString *drval2str = S57_getAttVal(geo, "DRVAL2");
double drval2 = (NULL == drval2str) ? drval1+0.01 : S52_atof(drval2str->str);
// adjuste datum
drval1 += S52_MP_get(S52_MAR_DATUM_OFFSET);
drval2 += S52_MP_get(S52_MAR_DATUM_OFFSET);
depare01 = _SEABED01(drval1, drval2);
/*
GString *objlstr = S57_getAttVal(geo, "OBJL");
int objl = (NULL == objlstr) ? 0 : S52_atoi(objlstr->str);
if (DRGARE == objl) {
*/
if (0 == g_strcmp0(S57_getName(geo), "DRGARE")) {
g_string_append(depare01, ";AP(DRGARE01)");
g_string_append(depare01, ";LS(DASH,1,CHGRF)");
GString *restrn01str = S57_getAttVal(geo, "RESTRN");
if (NULL != restrn01str) {
GString *rescsp01 = _RESCSP01(restrn01str);
if (NULL != rescsp01) {
g_string_append(depare01, rescsp01->str);
_g_string_free(rescsp01, TRUE);
}
}
}
return depare01;
}
static GString *DEPARE02 (S57_geo *geo)
{
static int silent = FALSE;
if (FALSE == silent) {
PRINTF("FIXME: CS(DEPARE02) --> CS(DEPARE01)\n");
PRINTF("FIXME: (this msg will not repeat)\n");
silent = TRUE;
}
return DEPARE01(geo);
}
static GString *DEPARE03 (S57_geo *geo)
{
static int silent = FALSE;
if (FALSE == silent) {
PRINTF("FIXME: CS(DEPARE03) --> CS(DEPARE01)\n");
PRINTF("FIXME: (this msg will not repeat)\n");
silent = TRUE;
}
return DEPARE01(geo);
}
static gboolean _DEPCNT02_isSC(S57_geo *geo)
// true if safety contour else false
{
// invariant: DRVAL1 <= SC <= DRVAL2 (top of S52 3.2 DEPCNT02 Nassi flow chart)
// --- deeper -->
//
// | SC requested by Mariners'
//
// | | | edge available in the ENC
//
// ..+-------+-------+..
// | | | area (made of edge)
// ..+-------+-------+..
//
// | SC edge selected by this func _DEPCNT02_isSC()
gboolean safety_contour = FALSE;
S57_geo *geoTouch = S57_getTouchDEPCNT(geo);
if (NULL != geoTouch) {
GString *drval1touchstr = S57_getAttVal(geoTouch, "DRVAL1");
if (NULL != drval1touchstr) {
double drval1touch = S52_atof(drval1touchstr->str);
// adjuste datum
drval1touch += S52_MP_get(S52_MAR_DATUM_OFFSET);
if (drval1touch < S52_MP_get(S52_MAR_SAFETY_CONTOUR)) {
safety_contour = TRUE;
}
}
// FIXME: document skip logic branch DRVAL1 not present
} else {
// FIXME: bizarre case where this DEPCNT/DEPARE doesn't touch any DEPARE/DRGARE - check upstream touch()
if (0 == g_strcmp0(S57_getName(geo), "DEPCNT")) {
PRINTF("FIXME: case where this DEPCNT doesn't touch any DEPARE/DRGARE - check upstream touch()\n");
//g_assert(0);
}
}
return safety_contour;
}
static GString *_SNDFRM02(S57_geo *geo, double depth_value); // forward decl
static GString *DEPCNT02 (S57_geo *geo)
// Remarks: An object of the class "depth contour" or "line depth area" is highlighted and must
// be shown under all circumstances if it matches the safety contour depth value
// entered by the mariner (see IMO PS 3.6). But, while the mariner is free to enter any
// safety contour depth value that he thinks is suitable for the safety of his ship, the
// SENC only contains a limited choice of depth contours. This symbology procedure
// determines whether a contour matches the selected safety contour. If the selected
// safety contour does not exist in the data, the procedure will default to the next deeper
// contour. The contour selected is highlighted as the safety contour and put in
// DISPLAYBASE. The procedure also identifies any line segment of the spatial
// component of the object that has a "QUAPOS" value indicating unreliable
// positioning, and symbolizes it with a double dashed line.
//
// Note: Depth contours are not normally labeled. The ECDIS may provide labels, on demand
// only as with other text, or provide the depth value on cursor picking
{
GString *depcnt02 = NULL;
gboolean safety_contour = FALSE; // initialy not a safety contour
//double depth_value; // for depth label (facultative in S-52)
// first reset original scamin
S57_setScamin(geo, S57_RESET_SCAMIN);
// DEPARE (line)
if (0 == g_strcmp0(S57_getName(geo), "DEPARE")) { // only DEPARE:L call CS(DEPCNT02)
// Note: if drval1 not given then set it to 0.0 (ie. LOW WATER LINE as FAIL-SAFE)
GString *drval1str = S57_getAttVal(geo, "DRVAL1");
double drval1 = (NULL == drval1str) ? 0.0 : S52_atof(drval1str->str);
GString *drval2str = S57_getAttVal(geo, "DRVAL2");
double drval2 = (NULL == drval2str) ? drval1 : S52_atof(drval2str->str);
// adjuste datum
drval1 += S52_MP_get(S52_MAR_DATUM_OFFSET);
drval2 += S52_MP_get(S52_MAR_DATUM_OFFSET);
// invariant: DRVAL1 <= SC <= DRVAL2 (top of S52 3.2 DEPCNT02 Nassi flow chart)
// is this line on SC
if (drval1 <= S52_MP_get(S52_MAR_SAFETY_CONTOUR)) {
if (drval2 >= S52_MP_get(S52_MAR_SAFETY_CONTOUR)) {
safety_contour = TRUE;
}
} else {
// collect area DEPARE & DRGARE that touch this line
// get next deeper line
safety_contour = _DEPCNT02_isSC(geo);
}
} else {
// continuation A (DEPCNT (line)) - only DEPCNT:L call CS(DEPCNT02)
GString *valdcostr = S57_getAttVal(geo, "VALDCO");
double valdco = (NULL == valdcostr) ? 0.0 : S52_atof(valdcostr->str);
// adjuste datum
valdco += S52_MP_get(S52_MAR_DATUM_OFFSET);
if (valdco == S52_MP_get(S52_MAR_SAFETY_CONTOUR)) {
safety_contour = TRUE;
} else {
if (valdco > S52_MP_get(S52_MAR_SAFETY_CONTOUR)) {
// collect area DEPARE & DRGARE that touche this line
// get next deeper line
safety_contour = _DEPCNT02_isSC(geo);
}
}
}
// Continuation B
// ASSUME: HO split lines to preserv different QUAPOS for a given line
// FIXME: check that the assumtion above is valid!
GString *quaposstr = S57_getAttVal(geo, "QUAPOS");
if (NULL != quaposstr) {
int quapos = S52_atoi(quaposstr->str);
if ( 2 <= quapos && quapos < 10) {
if (TRUE == safety_contour) {
depcnt02 = _g_string_new(depcnt02, ";LS(DASH,2,DEPSC)");
} else {
depcnt02 = _g_string_new(depcnt02, ";LS(DASH,1,DEPCN)");
}
}
} else {
if (TRUE == safety_contour) {
depcnt02 = _g_string_new(depcnt02, ";LS(SOLD,2,DEPSC)");
} else {
depcnt02 = _g_string_new(depcnt02, ";LS(SOLD,1,DEPCN)");
}
}
if (TRUE == safety_contour) {
S57_setScamin(geo, INFINITY);
depcnt02 = g_string_prepend(depcnt02, ";OP(8OD13010)");
} else {
depcnt02 = g_string_prepend(depcnt02, ";OP(---33020)");
}
/* depth label (facultative in S-52)
GString *sndfrm02 = _SNDFRM02(geo, depth_value);
depcnt02 = g_string_append(depcnt02, sndfrm02->str);
g_string_free(sndfrm02, TRUE);
*/
//PRINTF("DEBUG: depth= %f\n", depth_value);
return depcnt02;
}
static GString *DEPCNT03 (S57_geo *geo)
{
static int silent = FALSE;
if (FALSE == silent) {
PRINTF("FIXME: CS(DEPCNT03) --> CS(DEPCNT02)\n");
PRINTF("FIXME: (this msg will not repeat)\n");
silent = TRUE;
}
return DEPCNT02(geo);
}
static double _DEPVAL01(S57_geo *geo, double least_depth)
// Remarks: S-57 Appendix B1 Annex A requires in Section 6 that areas of rocks be
// encoded as area obstruction, and that area OBSTRNs and area WRECKS
// be covered by either group 1 object DEPARE or group 1 object UNSARE.
// If the value of the attribute VALSOU for an area OBSTRN or WRECKS
// is missing, the DRVAL1 of an underlying DEPARE is the preferred default
// for establishing a depth vale. This procedure either finds the shallowest
// DRVAL1 of the one or more underlying DEPAREs, or returns an
// "unknown" depth value to the main procedure for the next default
// procedure.
{