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<!DOCTYPE html>
<html>
<link rel='shortcut icon' type='image/png' href='img/favicon.png'/>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Betz-Law</title>
<body>
<div style="width:740px; word-wrap:break-word;">
<?php
/******************************
Project: Betz-Law
Version: 2024-05-16
Author : TIM/M.Kukic
******************************/
// Preuzimanje pocetnih podataka
$v = $_GET["v"];
$e = $_GET["e"];
$c = $_GET["c"];
// Parametri
$k=1/15;
$st=10;
$sek=100;
$sek=$sek*$st;
$g=9.81;
$ugr=$ug*3.14/180;
// Konfig. grafike
$dx=15;
$dy=620;
$dx2=700;
$dy2=70;
$dx3=$dx+10;
$dy3=$dy2+10;
$dy4=$dy-12;
// Smene
// Proracuni
// (1013.25 * 0,0289644 ) /(8,31447 * (273 + 20))
$p0 = 0.5 * 1.225 * $e * $v * $v * $v;
$p1 = $p0 * $c / 100;
$p0 = round($p0,0);
$p1 = round($p1,0);
$xr= 3.35 * $v*300;
$xr=$dx+$xr*$k;
$yr=$dy-$p0*$k;
$yri=$dy-$p1*$k;
$xr2=$xr - 25;
$yr2=$yr - 25;
//
$y0h=$dy-$y0*$k;
$d0h=$dx+$d*$k;
// SVG Boje
// https://www.december.com/html/spec/colorsvg.html
//
// Inicijalizacija prozora za crtanje
echo "<fieldset><legend><h3>Betz-Law snaga vetra na turbini vetrogeneratora</h3></legend><table border=\"0\"></fieldset>";
// Sivi okvir
echo "<svg xmlns='http://www.w3.org/2000/svg' version='1.1' width='725' height='640'>";
//echo "<svg width='320' height='640'>";
echo "<rect width='720' height='640' fill='rgb(253,248,243)' stroke-width='1' stroke='rgb(0,0,0)' />";
//
// Graficki ekran koordinatni sistem i tekst
echo "<g stroke='blue'>";
// Koordinatni sistem
echo "<line x1=".$dx." y1=".$dy." x2=".$dx2." y2=".$dy." stroke='blue' stroke-width='2'/>";
echo "<line x1=".$dx." y1=".$dy." x2=".$dx." y2=".$dy2." stroke='blue' stroke-width='2'/>";
echo "<text x=675 y=".$dy4." stroke='darkblue' font-size='15' font-weight='normal' font-family='monospace'>[m/s]</text>";
echo "<text x=".$dx3." y=".$dy3." stroke='darkblue' font-size='15' font-weight='normal' font-family='monospace'>[KW]</text>";
// Horizontalna ravan
echo "<line x1=".$dx." y1=".$y0h." x2=".$d0h." y2=".$y0h." stroke='black' stroke-dasharray='10,10' fill='none' stroke-width='1'/>";
echo "<line x1=".$d0h." y1=".$y0h." x2=".$d0h." y2=".$dy." stroke='black' stroke-dasharray='10,10' fill='none' stroke-width='1'/>";
// Pocetni podaci
echo "<text x='10' y='20' font-size='15' stroke='darkviolet' font-weight='normal' font-family='monospace'>V=".$v." m/s</text>";
echo "<text x='10' y='40' font-size='15' stroke='darkviolet' font-weight='normal' font-family='monospace'>E=".$e." m2</text>";
echo "<text x='10' y='60' font-size='15' stroke='darkviolet' font-weight='normal' font-family='monospace'>I=".$c." %</text>";
// Sumarni rezultati
echo "<text x='600' y='20' font-size='20' stroke='red' font-weight='normal' font-family='monospace'>Pw=".$p0." W</text>";
echo "<text x='600' y='40' font-size='20' stroke='green' font-weight='normal' font-family='monospace'>Pt=".$p1." W</text>";
//echo "<text x='600' y='60' font-size='15' stroke='red' font-weight='normal' font-family='monospace'>T=".$t." C</text>";
if ($v<10.1){
echo "<line x1=".$xr." y1=".$dy." x2=".$xr." y2=".$yr2." stroke='violet' stroke-width='2'/>";
echo "<line x1=".$xr2." y1=".$yr." x2=".$dx2." y2=".$yr." stroke='violet' stroke-width='2'/>";
echo "<line x1=".$xr2." y1=".$yri." x2=".$dx2." y2=".$yri." stroke='violet' stroke-width='2'/>";
}
// Mreza
$n=0;
for ($i = $dx+67; $i <= 700; $i=$i+67) {
$n=$n+1;
$y=$dy+15;
$x=$i-5;
echo "<line x1=".$i." y1=".$dy." x2=".$i." y2=".$dy2." stroke='lightgreen' stroke-dasharray='5,5' fill='none' stroke-width='1'/>";
echo "<text x=".$x." y=".$y." font-size='15' stroke='lightgreen' font-weight='normal' font-family='monospace'>".$n."</text>";
}
$n=0;
for ($i = (620-67); $i > 70; $i=$i-67) {
$n=$n+1;
echo "<line x1=".$dx." y1=".$i." x2=".$dx2." y2=".$i." stroke='lightgreen' stroke-dasharray='5,5' fill='none' stroke-width='1'/>";
echo "<text x=".$dx2." y=".$i." font-size='15' stroke='lightgreen' font-weight='normal' font-family='monospace'>".$n."</text>";
}
// Kraj grafickog segmenta
echo "</g>";
//
// Ciklus iscrtavanja putanje
echo "<g stroke='blue'>";
for ($i = 0; $i < 70; $i=$i+0.1) {
$x=$i*300;
$v=$i;
$y=0.5 * 1.225 * $e * $v * $v * $v * 0.0265;
$yi=$y * $c/100;
$x=$dx+$x*$k;
$y=$dy-$y*$k;
$yi=$dy-$yi*$k;
if (($x<$dx2)and($y>($dy2-50))and($y<($dy+5))){
echo "<circle cx='".$x."' cy='".$y."' r='1' stroke='red' stroke-width='1' fill='red' />";
echo "<circle cx='".$x."' cy='".$yi."' r='1' stroke='green' stroke-width='1' fill='green' />";
}
}
// Kraj grafickog segmenta
echo "</g>";
// Zatvaranje grafickog prozora
echo "</svg>";
//
?>
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<a href="javascript:history.go(-1)"><img src=img/r_ret.png width='' height='48'></a>;
</div>
</body>
</html>