public function forward($pt)
{
$lon = $pt->x;
$lat = $pt->y;
// convert to radians
if ($lat * Sourcemap_Proj::R2D > 90.0 && $lat * Sourcemap_Proj::R2D < -90.0 && $lon * Sourcemap_Proj::R2D > 180.0 && $lon * Sourcemap_Proj::R2D < -180.0) {
throw new Exception('Lat/Lon input out of range.');
}
if (abs(abs($lat) - Sourcemap_Proj::HALF_PI) <= Sourcemap_Proj::EPSLN) {
throw new Exception('Lat/Long at poles.');
} else {
if ($this->_proj->sphere) {
$x = $this->_proj->x0 + $this->_proj->a * $this->_proj->k0 * Sourcemap_Proj::adjust_lon($lon - $this->_proj->long0);
$y = $this->_proj->y0 + $this->_proj->a * $this->_proj->k0 * log(tan(Sourcemap_Proj::FORTPI + 0.5 * $lat));
} else {
$sinphi = sin($lat);
$ts = Sourcemap_Proj::tsfnz($this->_proj->e, $lat, $sinphi);
$x = $this->_proj->x0 + $this->_proj->a * $this->_proj->k0 * Sourcemap_Proj::adjust_lon($lon - $this->_proj->long0);
$y = $this->_proj->y0 - $this->_proj->a * $this->_proj->k0 * log($ts);
}
$pt->x = $x;
$pt->y = $y;
return $pt;
}
}
public function forward($p)
{
# $theta; /* angle */
# $sin_phi, $cos_phi;/* sin and cos value */
# $b; /* temporary values */
# $c, $t, $tq; /* temporary values */
# $con, $n, $ml; /* cone constant, small m */
# $q, $us, $vl;
# $ul, $vs;
# $s;
# $dlon;
# $ts1;
$lon = $p->x;
$lat = $p->y;
/* Forward equations
-----------------*/
$sin_phi = sin($lat);
$dlon = Sourcemap_Proj::adjust_lon($lon - $this->longc);
$vl = sin($this->bl * $dlon);
if (abs(abs($lat) - Sourcemap_Proj::HALF_PI) > Sourcemap_Proj::EPSLN) {
$ts1 = Sourcemap_Proj::tsfnz($this->e, $lat, $sin_phi);
$q = $this->el / pow($ts1, $this->bl);
$s = 0.5 * ($q - 1.0 / $q);
$t = 0.5 * ($q + 1.0 / $q);
$ul = ($s * $this->singam - $vl * $this->cosgam) / $t;
$con = cos($this->bl * $dlon);
if (abs($con) < 1.0E-7) {
$us = $this->al * $this->bl * $dlon;
} else {
$us = $this->al * atan(($s * $this->cosgam + $vl * $this->singam) / $con) / $this->bl;
if ($con < 0) {
$us = $us + Sourcemap_Proj::PI * $this->al / $this->bl;
}
}
} else {
if ($lat >= 0) {
$ul = $this->singam;
} else {
$ul = -$this->singam;
}
$us = $this->al * $lat / $this->bl;
}
if (abs(abs($ul) - 1.0) <= Sourcemap_Proj::EPSLN) {
throw new Exception("Infinity...");
}
$vs = 0.5 * $this->al * log((1.0 - $ul) / (1.0 + $ul)) / $this->bl;
$us = $us - $this->u;
$x = $this->x0 + $vs * $this->cosaz + $us * $this->sinaz;
$y = $this->y0 + $us * $this->cosaz - $vs * $this->sinaz;
$p->x = $x;
$p->y = $y;
return $p;
}
public function forward($pt)
{
$lon = $pt->x;
$lat = $pt->y;
// convert to radians
if ($lat <= 90.0 && $lat >= -90.0 && $lon <= 180.0 && $lon >= -180.0) {
//lon = lon * Sourcemap_Proj::D2R;
//lat = lat * Sourcemap_Proj::D2R;
// holdover from proj4js
} else {
throw new Exception('Lat/Lon input out of range.');
}
$con = abs(abs($lat) - Sourcemap_Proj::HALF_PI);
if ($con > Sourcemap_Proj::EPSLN) {
$ts = Sourcemap_Proj::tsfnz($this->_proj->e, $lat, sin($lat));
$rh1 = $this->_proj->a * $this->_proj->f0 * pow($ts, $this->_proj->ns);
} else {
$con = $lat * $this->_proj->ns;
if ($con <= 0) {
throw new Exception('No projection.');
}
$rh1 = 0;
}
$theta = $this->_proj->ns * Sourcemap_Proj::adjust_lon($lon - $this->_proj->long0);
$pt->x = $this->_proj->k0 * (rh1 * sin(theta)) + $this->_proj->x0;
$pt->y = $this->_proj->k0 * ($this->_proj->rh - $rh1 * cos($theta)) + $this->_proj->y0;
return $pt;
}
public function forward($p)
{
$lon = $p->x;
$lon = Sourcemap_Proj::adjust_lon($lon - $this->long0);
$lat = $p->y;
if ($this->sphere) {
$sinphi = sin($lat);
$cosphi = cos($lat);
$coslam = cos($lon);
$sinlam = sin($lon);
switch ($this->mode) {
case $this->EQUIT:
$y = 1.0 + $cosphi * $coslam;
if ($y <= Sourcemap_Proj::EPSLN) {
throw new Exception("Bad y.");
}
$y = $this->akm1 / $y;
$x = $y * $cosphi * $sinlam;
$y *= $sinphi;
break;
case $this->OBLIQ:
$y = 1.0 + $this->sinph0 * $sinphi + $this->cosph0 * $cosphi * $coslam;
if ($y <= Sourcemap_Proj::EPSLN) {
throw new Exception("Bad y.");
}
$y = $this->akm1 / $y;
$x = $y * $cosphi * $sinlam;
$y *= $this->cosph0 * $sinphi - $this->sinph0 * $cosphi * $coslam;
break;
case $this->N_POLE:
$coslam = -$coslam;
$lat = -$lat;
//Note no break here so it conitnues through S_POLE
//Note no break here so it conitnues through S_POLE
case $this->S_POLE:
if (abs($lat - Sourcemap_Proj::HALF_PI) < $this->TOL) {
throw new Exception("Bad value.");
}
$y = $this->akm1 * tan(Sourcemap_Proj::FORTPI + 0.5 * $lat);
$x = $sinlam * $y;
$y *= $coslam;
break;
}
} else {
$coslam = cos($lon);
$sinlam = sin($lon);
$sinphi = sin($lat);
if ($this->mode == $this->OBLIQ || $this->mode == $this->EQUIT) {
$X = 2.0 * atan($this->ssfn_($lat, $sinphi, $this->e));
$sinX = sin($X - Sourcemap_Proj::HALF_PI);
$cosX = cos($X);
}
switch ($this->mode) {
case $this->OBLIQ:
$A = $this->akm1 / ($this->cosX1 * (1.0 + $this->sinX1 * $sinX + $this->cosX1 * $cosX * $coslam));
$y = $A * ($this->cosX1 * $sinX - $this->sinX1 * $cosX * $coslam);
$x = $A * $cosX;
break;
case $this->EQUIT:
$A = 2.0 * $this->akm1 / (1.0 + $cosX * $coslam);
$y = $A * $sinX;
$x = $A * $cosX;
break;
case $this->S_POLE:
$lat = -$lat;
$coslam = -$coslam;
$sinphi = -$sinphi;
case $this->N_POLE:
$x = $this->akm1 * Sourcemap_Proj::tsfnz($this->e, $lat, $sinphi);
$y = -$x * $coslam;
break;
}
$x = $x * $sinlam;
}
$p->x = $x * $this->a + $this->x0;
$p->y = $y * $this->a + $this->y0;
return $p;
}