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/**
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* Navit, a modular navigation system.
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* Copyright (C) 2005-2008 Navit Team
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include <stdlib.h>
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#include <glib.h>
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#include <stdio.h>
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#include <string.h>
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#include <math.h>
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#include "debug.h"
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#include "item.h"
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#include "coord.h"
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#include "transform.h"
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#include "projection.h"
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/**
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* @defgroup coord Coordinate handling functions
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* @{
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*/
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/**
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* Get a coordinate
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*
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* @param p Pointer to the coordinate
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* @returns the coordinate
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*/
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zoff99 |
28 |
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/*
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================
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sine lookup table (input in degress)
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================
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*/
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/*
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#define SINMAX 9000
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double sinlut[SINMAX + 1];
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void sincreate(void)
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{
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int i;
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double angle, angleinc;
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angleinc = 3.1415926535 / 2.0 / (SINMAX);
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for (i = 0, angle = 0.0; i <= SINMAX; ++i, angle += angleinc)
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{
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sinlut[i] = sin(angle);
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}
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}
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double sin_lut(double degrees)
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{
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int ix;
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ix = (int)(degrees * 100.0);
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return sinlut[ix];
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}
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*/
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// very fast, but can be a bit off the real value!! so be careful!
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float sqrtf_fast2(float x2)
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{
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unsigned int i = *(unsigned int*) &x2;
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// adjust bias
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i += 127 << 23;
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// approximation of square root
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i >>= 1;
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return *(float*) &i;
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}
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/*
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================
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SquareRootFloat (rather accurate)
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================
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*/
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float sqrtf_fast(float number2)
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{
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long i;
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float x, y;
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const float f = 1.5F;
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x = number2 * 0.5F;
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y = number2;
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i = * ( long * ) &y;
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i = 0x5f3759df - ( i >> 1 );
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y = * ( float * ) &i;
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y = y * ( f - ( x * y * y ) );
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y = y * ( f - ( x * y * y ) );
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return number2 * y;
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}
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zoff99 |
2 |
struct coord *
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coord_get(unsigned char **p)
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{
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struct coord *ret=(struct coord *)(*p);
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*p += sizeof(*ret);
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return ret;
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}
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struct coord *
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coord_new(int x, int y)
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{
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struct coord *c=g_new(struct coord, 1);
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c->x=x;
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c->y=y;
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return c;
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}
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struct coord *
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coord_new_from_attrs(struct attr *parent, struct attr **attrs)
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{
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struct attr *x,*y;
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x=attr_search(attrs, NULL, attr_x);
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y=attr_search(attrs, NULL, attr_y);
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if (!x || !y)
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return NULL;
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return coord_new(x->u.num, y->u.num);
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}
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void
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coord_destroy(struct coord *c)
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{
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g_free(c);
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}
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struct coord_rect *
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coord_rect_new(struct coord *lu, struct coord *rl)
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{
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struct coord_rect *r=g_new(struct coord_rect, 1);
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dbg_assert(lu->x <= rl->x);
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dbg_assert(lu->y >= rl->y);
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r->lu=*lu;
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r->rl=*rl;
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return r;
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}
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void
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coord_rect_destroy(struct coord_rect *r)
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{
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g_free(r);
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}
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164 |
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int
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coord_rect_overlap(struct coord_rect *r1, struct coord_rect *r2)
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{
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zoff99 |
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//dbg(1,"0x%x,0x%x - 0x%x,0x%x vs 0x%x,0x%x - 0x%x,0x%x\n", r1->lu.x, r1->lu.y, r1->rl.x, r1->rl.y, r2->lu.x, r2->lu.y, r2->rl.x, r2->rl.y);
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zoff99 |
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// ****** this sometimes causes a crash at startup!! ********
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// ****** this sometimes causes a crash at startup!! ********
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// dbg_assert(r1->lu.x <= r1->rl.x);
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// dbg_assert(r1->lu.y >= r1->rl.y);
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// dbg_assert(r2->lu.x <= r2->rl.x);
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// dbg_assert(r2->lu.y >= r2->rl.y);
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// ****** this sometimes causes a crash at startup!! ********
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// ****** this sometimes causes a crash at startup!! ********
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if (r1->lu.x > r2->rl.x)
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return 0;
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if (r1->rl.x < r2->lu.x)
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return 0;
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if (r1->lu.y < r2->rl.y)
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return 0;
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if (r1->rl.y > r2->lu.y)
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return 0;
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return 1;
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187 |
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}
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188 |
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189 |
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int
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coord_rect_contains(struct coord_rect *r, struct coord *c)
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191 |
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{
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dbg_assert(r->lu.x <= r->rl.x);
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dbg_assert(r->lu.y >= r->rl.y);
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if (c->x < r->lu.x)
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return 0;
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if (c->x > r->rl.x)
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197 |
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return 0;
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198 |
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if (c->y < r->rl.y)
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199 |
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return 0;
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200 |
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if (c->y > r->lu.y)
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201 |
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return 0;
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202 |
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return 1;
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203 |
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}
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204 |
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205 |
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void
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206 |
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coord_rect_extend(struct coord_rect *r, struct coord *c)
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207 |
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{
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208 |
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if (c->x < r->lu.x)
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209 |
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r->lu.x=c->x;
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210 |
zoff99 |
41 |
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211 |
zoff99 |
2 |
if (c->x > r->rl.x)
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r->rl.x=c->x;
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213 |
zoff99 |
41 |
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214 |
zoff99 |
2 |
if (c->y < r->rl.y)
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215 |
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r->rl.y=c->y;
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216 |
zoff99 |
41 |
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217 |
zoff99 |
2 |
if (c->y > r->lu.y)
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218 |
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r->lu.y=c->y;
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219 |
zoff99 |
41 |
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220 |
zoff99 |
2 |
}
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221 |
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222 |
zoff99 |
41 |
/*
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223 |
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*
|
224 |
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* extend rect by "percent" (e.g.: 0.2f) --> means: add left 10% and add right 10% and so on ...
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225 |
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*
|
226 |
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*/
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227 |
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void coord_rect_extend_by_percent(struct coord_rect *r, float percent)
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228 |
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{
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229 |
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// extend rectangle by factor
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230 |
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//
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231 |
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// x
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232 |
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int dx = abs(r->rl.x - r->lu.x);
|
233 |
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float dx2 = ((float)dx * percent)/2.0f;
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234 |
zoff99 |
48 |
// dbg(0, "EXTEND_RECT:01a:dx=%d dx2=%f lu.x=%d rl.x=%d\n", dx, dx2, r->lu.x, r->rl.x);
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235 |
zoff99 |
41 |
r->rl.x = (int)((float)r->rl.x + dx2);
|
236 |
|
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r->lu.x = (int)((float)r->lu.x - dx2);
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237 |
zoff99 |
48 |
// dbg(0, "EXTEND_RECT:01b:dx=%d dx2=%f lu.x=%d rl.x=%d\n", dx, dx2, r->lu.x, r->rl.x);
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238 |
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|
239 |
zoff99 |
41 |
//
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240 |
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// y
|
241 |
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int dy = abs(r->rl.y - r->lu.y);
|
242 |
|
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float dy2 = ((float)dy * percent)/2.0f;
|
243 |
zoff99 |
48 |
// dbg(0, "EXTEND_RECT:02a:dy=%d dy2=%f rl.y=%d lu.y=%d\n", dy, dy2, r->rl.y, r->lu.y);
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244 |
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r->rl.y = (int)((float)r->rl.y - dy2);
|
245 |
|
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r->lu.y = (int)((float)r->lu.y + dy2);
|
246 |
|
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// dbg(0, "EXTEND_RECT:02b:dy=%d dy2=%f rl.y=%d lu.y=%d\n", dy, dy2, r->rl.y, r->lu.y);
|
247 |
zoff99 |
41 |
}
|
248 |
|
|
|
249 |
|
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|
250 |
zoff99 |
2 |
/**
|
251 |
|
|
* Parses \c char \a *c_str and writes back the coordinates to \c coord \a *c_ret. Uses \c projection \a pro if no projection is given in \c char \a *c_str.
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252 |
|
|
* The format for \a *c_str can be:
|
253 |
|
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* \li [Proj:]-0xX [-]0xX
|
254 |
|
|
* - where Proj can be mg/garmin, defaults to mg
|
255 |
|
|
* \li [Proj:][D][D]Dmm.ss[S][S] N/S [D][D]DMM.ss[S][S]... E/W
|
256 |
|
|
* \li [Proj:][-][D]D.d[d]... [-][D][D]D.d[d]
|
257 |
|
|
* - where Proj can be geo
|
258 |
|
|
*
|
259 |
|
|
* @param *c_str String to be parsed
|
260 |
|
|
* @param pro Projection of the string
|
261 |
|
|
* @param *pc_ret Where the \a pcoord should get stored
|
262 |
|
|
* @returns The lenght of the parsed string
|
263 |
|
|
*/
|
264 |
|
|
|
265 |
|
|
int
|
266 |
|
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coord_parse(const char *c_str, enum projection pro, struct coord *c_ret)
|
267 |
|
|
{
|
268 |
|
|
int debug=0;
|
269 |
|
|
char *proj=NULL,*s,*co;
|
270 |
|
|
const char *str=c_str;
|
271 |
|
|
int args,ret = 0;
|
272 |
|
|
struct coord_geo g;
|
273 |
|
|
struct coord c;
|
274 |
|
|
enum projection str_pro=projection_none;
|
275 |
|
|
|
276 |
zoff99 |
31 |
//dbg(1,"enter('%s',%d,%p)\n", c_str, pro, c_ret);
|
277 |
zoff99 |
2 |
s=strchr(str,' ');
|
278 |
|
|
co=strchr(str,':');
|
279 |
|
|
if (co && co < s) {
|
280 |
|
|
proj=malloc(co-str+1);
|
281 |
|
|
strncpy(proj, str, co-str);
|
282 |
|
|
proj[co-str]='\0';
|
283 |
zoff99 |
31 |
//dbg(1,"projection=%s\n", proj);
|
284 |
zoff99 |
2 |
str=co+1;
|
285 |
|
|
s=strchr(str,' ');
|
286 |
|
|
if (!strcmp(proj, "mg"))
|
287 |
|
|
str_pro = projection_mg;
|
288 |
|
|
else if (!strcmp(proj, "garmin"))
|
289 |
|
|
str_pro = projection_garmin;
|
290 |
|
|
else if (!strcmp(proj, "geo"))
|
291 |
|
|
str_pro = projection_none;
|
292 |
|
|
else {
|
293 |
|
|
dbg(0, "Unknown projection: %s\n", proj);
|
294 |
|
|
goto out;
|
295 |
|
|
}
|
296 |
|
|
}
|
297 |
|
|
if (! s) {
|
298 |
|
|
ret=0;
|
299 |
|
|
goto out;
|
300 |
|
|
}
|
301 |
|
|
while (*s == ' ') {
|
302 |
|
|
s++;
|
303 |
|
|
}
|
304 |
|
|
if (!strncmp(s, "0x", 2) || !strncmp(s, "-0x", 3)) {
|
305 |
|
|
args=sscanf(str, "%i %i%n",&c.x, &c.y, &ret);
|
306 |
|
|
if (args < 2)
|
307 |
|
|
goto out;
|
308 |
zoff99 |
31 |
//dbg(1,"str='%s' x=0x%x y=0x%x c=%d\n", str, c.x, c.y, ret);
|
309 |
|
|
//dbg(1,"rest='%s'\n", str+ret);
|
310 |
zoff99 |
2 |
|
311 |
|
|
if (str_pro == projection_none)
|
312 |
|
|
str_pro=projection_mg;
|
313 |
|
|
if (str_pro != pro) {
|
314 |
|
|
transform_to_geo(str_pro, &c, &g);
|
315 |
|
|
transform_from_geo(pro, &g, &c);
|
316 |
|
|
}
|
317 |
|
|
*c_ret=c;
|
318 |
|
|
} else if (*s == 'N' || *s == 'n' || *s == 'S' || *s == 's') {
|
319 |
|
|
double lng, lat;
|
320 |
|
|
char ns, ew;
|
321 |
zoff99 |
31 |
//dbg(1,"str='%s'\n", str);
|
322 |
zoff99 |
2 |
args=sscanf(str, "%lf %c %lf %c%n", &lat, &ns, &lng, &ew, &ret);
|
323 |
zoff99 |
31 |
//dbg(1,"args=%d\n", args);
|
324 |
|
|
//dbg(1,"lat=%f %c lon=%f %c\n", lat, ns, lng, ew);
|
325 |
zoff99 |
2 |
if (args < 4)
|
326 |
|
|
goto out;
|
327 |
zoff99 |
31 |
//dbg(1,"projection=%d str_pro=%d projection_none=%d\n", pro, str_pro, projection_none);
|
328 |
zoff99 |
2 |
if (str_pro == projection_none) {
|
329 |
|
|
g.lat=floor(lat/100);
|
330 |
|
|
lat-=g.lat*100;
|
331 |
|
|
g.lat+=lat/60;
|
332 |
|
|
g.lng=floor(lng/100);
|
333 |
|
|
lng-=g.lng*100;
|
334 |
|
|
g.lng+=lng/60;
|
335 |
|
|
if (ns == 's' || ns == 'S')
|
336 |
|
|
g.lat=-g.lat;
|
337 |
|
|
if (ew == 'w' || ew == 'W')
|
338 |
|
|
g.lng=-g.lng;
|
339 |
zoff99 |
31 |
//dbg(1,"transform_from_geo(%f,%f)",g.lat,g.lng);
|
340 |
zoff99 |
2 |
transform_from_geo(pro, &g, c_ret);
|
341 |
zoff99 |
31 |
//dbg(1,"result 0x%x,0x%x\n", c_ret->x,c_ret->y);
|
342 |
zoff99 |
2 |
}
|
343 |
zoff99 |
31 |
//dbg(3,"str='%s' x=%f ns=%c y=%f ew=%c c=%d\n", str, lng, ns, lat, ew, ret);
|
344 |
|
|
//dbg(3,"rest='%s'\n", str+ret);
|
345 |
zoff99 |
2 |
} else {
|
346 |
|
|
double lng, lat;
|
347 |
|
|
args=sscanf(str, "%lf %lf%n", &lng, &lat, &ret);
|
348 |
|
|
if (args < 2)
|
349 |
|
|
goto out;
|
350 |
zoff99 |
31 |
//dbg(1,"str='%s' x=%f y=%f c=%d\n", str, lng, lat, ret);
|
351 |
|
|
//dbg(1,"rest='%s'\n", str+ret);
|
352 |
zoff99 |
2 |
g.lng=lng;
|
353 |
|
|
g.lat=lat;
|
354 |
|
|
transform_from_geo(pro, &g, c_ret);
|
355 |
|
|
}
|
356 |
zoff99 |
31 |
//if (debug)
|
357 |
|
|
// printf("rest='%s'\n", str+ret);
|
358 |
zoff99 |
2 |
ret+=str-c_str;
|
359 |
zoff99 |
31 |
//if (debug) {
|
360 |
|
|
// printf("args=%d\n", args);
|
361 |
|
|
// printf("ret=%d delta=%d ret_str='%s'\n", ret, GPOINTER_TO_INT(str-c_str), c_str+ret);
|
362 |
|
|
//}
|
363 |
zoff99 |
2 |
out:
|
364 |
|
|
free(proj);
|
365 |
|
|
return ret;
|
366 |
|
|
}
|
367 |
|
|
|
368 |
|
|
/**
|
369 |
|
|
* A wrapper for pcoord_parse that also return the projection
|
370 |
|
|
* @param *c_str String to be parsed
|
371 |
|
|
* @param pro Projection of the string
|
372 |
|
|
* @param *pc_ret Where the \a pcoord should get stored
|
373 |
|
|
* @returns The lenght of the parsed string
|
374 |
|
|
*/
|
375 |
|
|
|
376 |
|
|
int
|
377 |
|
|
pcoord_parse(const char *c_str, enum projection pro, struct pcoord *pc_ret)
|
378 |
|
|
{
|
379 |
|
|
struct coord c;
|
380 |
|
|
int ret;
|
381 |
|
|
ret = coord_parse(c_str, pro, &c);
|
382 |
|
|
pc_ret->x = c.x;
|
383 |
|
|
pc_ret->y = c.y;
|
384 |
|
|
pc_ret->pro = pro;
|
385 |
|
|
return ret;
|
386 |
|
|
}
|
387 |
|
|
|
388 |
|
|
void
|
389 |
|
|
coord_print(enum projection pro, struct coord *c, FILE *out) {
|
390 |
|
|
unsigned int x;
|
391 |
|
|
unsigned int y;
|
392 |
|
|
char *sign_x = "";
|
393 |
|
|
char *sign_y = "";
|
394 |
|
|
|
395 |
|
|
if ( c->x < 0 ) {
|
396 |
|
|
x = -c->x;
|
397 |
|
|
sign_x = "-";
|
398 |
|
|
} else {
|
399 |
|
|
x = c->x;
|
400 |
|
|
}
|
401 |
|
|
if ( c->y < 0 ) {
|
402 |
|
|
y = -c->y;
|
403 |
|
|
sign_y = "-";
|
404 |
|
|
} else {
|
405 |
|
|
y = c->y;
|
406 |
|
|
}
|
407 |
|
|
fprintf( out, "%s: %s0x%x %s0x%x\n",
|
408 |
|
|
projection_to_name( pro , NULL),
|
409 |
|
|
sign_x, x,
|
410 |
|
|
sign_y, y );
|
411 |
|
|
return;
|
412 |
|
|
}
|
413 |
|
|
|
414 |
|
|
/**
|
415 |
|
|
* @brief Converts a lat/lon into a text formatted text string.
|
416 |
|
|
* @param lat The latitude (if lat is 360 or greater, the latitude will be omitted)
|
417 |
|
|
* @param lng The longitude (if lng is 360 or greater, the longitude will be omitted)
|
418 |
|
|
* @param fmt The format to use.
|
419 |
|
|
* @li DEGREES_DECIMAL=>Degrees with decimal places, i.e. 20.5000°N 110.5000°E
|
420 |
|
|
* @li DEGREES_MINUTES=>Degrees and minutes, i.e. 20°30.00'N 110°30.00'E
|
421 |
|
|
* @li DEGREES_MINUTES_SECONDS=>Degrees, minutes and seconds, i.e. 20°30'30.00"N 110°30'30"E
|
422 |
|
|
*
|
423 |
|
|
*
|
424 |
|
|
* @param buffer A buffer large enough to hold the output + a terminating NULL (up to 31 bytes)
|
425 |
|
|
* @param size The size of the buffer
|
426 |
|
|
*
|
427 |
|
|
*/
|
428 |
|
|
void coord_format(float lat,float lng, enum coord_format fmt, char * buffer, int size)
|
429 |
|
|
{
|
430 |
|
|
|
431 |
|
|
char lat_c='N';
|
432 |
|
|
char lng_c='E';
|
433 |
|
|
float lat_deg,lat_min,lat_sec;
|
434 |
|
|
float lng_deg,lng_min,lng_sec;
|
435 |
|
|
int size_used=0;
|
436 |
|
|
|
437 |
|
|
if (lng < 0) {
|
438 |
|
|
lng=-lng;
|
439 |
|
|
lng_c='W';
|
440 |
|
|
}
|
441 |
|
|
if (lat < 0) {
|
442 |
|
|
lat=-lat;
|
443 |
|
|
lat_c='S';
|
444 |
|
|
}
|
445 |
|
|
lat_deg=lat;
|
446 |
|
|
lat_min=(lat-floor(lat_deg))*60;
|
447 |
|
|
lat_sec=fmod(lat*3600,60);
|
448 |
|
|
lng_deg=lng;
|
449 |
|
|
lng_min=(lng-floor(lng_deg))*60;
|
450 |
|
|
lng_sec=fmod(lng*3600,60);
|
451 |
|
|
switch(fmt)
|
452 |
|
|
{
|
453 |
|
|
|
454 |
|
|
case DEGREES_DECIMAL:
|
455 |
|
|
if (lat<360)
|
456 |
|
|
size_used+=g_snprintf(buffer+size_used,size-size_used,"%02.6f°%c",lat,lat_c);
|
457 |
|
|
if ((lat<360)&&(lng<360))
|
458 |
|
|
size_used+=g_snprintf(buffer+size_used,size-size_used," ");
|
459 |
|
|
if (lng<360)
|
460 |
|
|
size_used+=g_snprintf(buffer+size_used,size-size_used,"%03.7f°%c",lng,lng_c);
|
461 |
|
|
break;
|
462 |
|
|
case DEGREES_MINUTES:
|
463 |
|
|
if (lat<360)
|
464 |
|
|
size_used+=g_snprintf(buffer+size_used,size-size_used,"%02.0f°%07.4f' %c",floor(lat_deg),lat_min,lat_c);
|
465 |
|
|
if ((lat<360)&&(lng<360))
|
466 |
|
|
size_used+=g_snprintf(buffer+size_used,size-size_used," ");
|
467 |
|
|
if (lng<360)
|
468 |
|
|
size_used+=g_snprintf(buffer+size_used,size-size_used,"%03.0f°%07.4f' %c",floor(lng_deg),lng_min,lng_c);
|
469 |
|
|
break;
|
470 |
|
|
case DEGREES_MINUTES_SECONDS:
|
471 |
|
|
if (lat<360)
|
472 |
|
|
size_used+=g_snprintf(buffer+size_used,size-size_used,"%02.0f°%02.0f'%05.2f\" %c",floor(lat_deg),floor(lat_min),lat_sec,lat_c);
|
473 |
|
|
if ((lat<360)&&(lng<360))
|
474 |
|
|
size_used+=g_snprintf(buffer+size_used,size-size_used," ");
|
475 |
|
|
if (lng<360)
|
476 |
|
|
size_used+=g_snprintf(buffer+size_used,size-size_used,"%03.0f°%02.0f'%05.2f\" %c",floor(lng_deg),floor(lng_min),lng_sec,lng_c);
|
477 |
|
|
break;
|
478 |
|
|
|
479 |
|
|
|
480 |
|
|
}
|
481 |
|
|
|
482 |
|
|
}
|
483 |
|
|
|
484 |
|
|
unsigned int
|
485 |
|
|
coord_hash(const void *key)
|
486 |
|
|
{
|
487 |
zoff99 |
31 |
const struct coord *c=key;
|
488 |
zoff99 |
2 |
return c->x^c->y;
|
489 |
|
|
}
|
490 |
|
|
|
491 |
|
|
int
|
492 |
|
|
coord_equal(const void *a, const void *b)
|
493 |
|
|
{
|
494 |
zoff99 |
31 |
const struct coord *c_a=a;
|
495 |
|
|
const struct coord *c_b=b;
|
496 |
|
|
|
497 |
zoff99 |
2 |
if (c_a->x == c_b->x && c_a->y == c_b->y)
|
498 |
zoff99 |
31 |
{
|
499 |
|
|
return TRUE;
|
500 |
|
|
}
|
501 |
|
|
return FALSE;
|
502 |
zoff99 |
2 |
}
|
503 |
zoff99 |
41 |
|
504 |
|
|
|
505 |
zoff99 |
2 |
/** @} */
|
506 |
zoff99 |
41 |
|
507 |
|
|
|