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blockCase_compare.html
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<!-- @MrEranwe @EliasHasle -->
<!--Elias comments: This can be simplified a lot by exploiting the pattern in the table. Make a loop that takes a list of pretty names and a list of property names, and generates the table row by row, extracting the given properties from one hand-calculated object and one machine-calculated object, and comparing them with %diff automatically within the loop.-->
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="">
<meta name="author" content="">
<title>Ship visualization with specification</title>|
<!-- Bootstrap Core CSS -->
<link href="libs/bootstrap.min.css" rel="stylesheet">
<!-- jQuery Version 1.11.1 -->
<script src="libs/jquery.js"></script>
<!-- Bootstrap Core JavaScript -->
<script src="libs/bootstrap.min.js"></script>
<!-- D3JavaScript -->
<script src="libs/d3_v4.9.1.js"></script>
<!-- Prettyprinting of JSON data -->
<script type="text/javascript" src="libs/renderjson.js"></script>
<!-- Plotly.js -->
<script src="libs/plotly-1.48.3.min.js"></script>
<!-- alegebra.js -->
<script src="libs/algebra-0.2.6.min.js"></script>
<!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/js/libs/html5shiv/3.7.0/html5shiv.js"></script>
<script src="https://oss.maxcdn.com/js/libs/respond.js/1.4.2/respond.min.js"></script>
<![endif]-->
</head>
<body>
<!-- Navigation -->
<nav class="navbar navbar-inverse">
<div class="container">
<!-- Add the <div>[Something]</div> structure for each header in the navbar-->
<div class="navbar-header">
<a class="navbar-brand" href="https://github.com/shiplab/vesseljs">Github project page</a>
</div>
<!-- This is for the right part of the navbar. Reserved for Shiplab logo-->
<div class="nav navbar-nav navbar-right">
<div class="navbar-header">
<a class="navbar-brand" href="http://www.shiplab.hials.org/"><img src="../images/barquinho.png" alt="Shiplab logo" style="height:150%">
</a>
</div>
</div>
</div>
</nav>
<!-- Container creates the space -->
<div class="container">
<!-- Row creates horizontal groups of columns -->
<div class="row">
<!-- choose horizontal layout in https://www.w3schools.com/bootstrap/bootstrap_grid_examples.asp-->
<!-- No divisions in page. Only 1 column. -->
<div class="col-md-12 text-center">
<h2>Ship as object</h2>
</div>
<div class="col-md-12 text-center">
<!-- Link the GitHub page if you have one. Add a pdf of how the project works if necessary. Just put it inside the same folder and call it how_to.pdf -->
<!--<h1>Ship as Object</h1>-->
<p>This app asks for a JSON file
and gives back the pretty form of the JSON element. It also plots a 3D image of the ship. Sample data is loaded at startup.</p>
<p>Developed by: Elias Hasle, Vicente Alejandro Iváñez Encinas and Henrique M. Gaspar. Visualization made using three.js.</p>
</div>
<div class="col-md-12 text-left">
<h2>Input</h2>
<input type="file" id="file-input" />
<h3>Contents of the file:</h3>
<pre id="file-content"></pre>
<br>
</div>
<div class="col-md-12 text-left">
<h2>3D orbit view of hull and parts</h2>
</div>
<div id="3d" class="col-md-12 text-left" style="min-height: 80vh">
</div>
<div class="col-md-12 text-left">
<h2>Whole ship</h2>
<h3>Ship specifications</h3>
<table class="table">
<thead>
<tr>
<th>Variable</th>
<th>Value</th>
</tr>
</thead>
<body>
<tr>
<td>Lenght Overall</td>
<td><span id="LOA"></span><span> m</span></td>
</tr>
<tr>
<td>Breadth Overall</td>
<td><span id="BOA"></span><span> m</span></td>
</tr>
<tr>
<td>Depth</td>
<td><span id="depth"></span><span> m</span></td>
</tr>
<tr>
<td>Design Draft</td>
<td><span id="draftdesign"></span><span> m</span></td>
</tr>
<tr>
<td>Design speed</td>
<td><span id="speeddesign"></span><span> knots</span></td>
</tr>
<tr>
<td>Lightweight</td>
<td><span id="lightweight"></span><span> kg</span></td>
</tr>
</body>
</table>
<h3>Calculations</h3>
<table class="table">
<thead>
<tr>
<th>Variable</th>
<th>Hand value</th>
<th>Calculated on Hidromax</th> <!-- @ferrari212 -->
<th>Calculated value</th>
<th>% diff</th>
</tr>
</thead>
<body>
<tr>
<td>Draft Amidships (m)</td>
<td><span id="draftms"></span></td>
<td><span id="drafth"></span></td>
<td><span id="draftc"></span></td>
<td><span id="draftd"></span></td>
</tr>
<tr>
<td>Displacement (t)</td>
<td><span id="disp"></span></td>
<td><span id="disph"></span></td>
<td><span id="dispc"></span></td>
<td><span id="dispd"></span></td>
</tr>
<tr>
<td>Waterline Lenght (m)</td>
<td><span id="lwl"></span></td>
<td><span id="lwlh"></span></td>
<td><span id="lwlc"></span></td>
<td><span id="lwld"></span></td>
</tr>
<tr>
<td>Maximum Waterline Breath (m)</td>
<td><span id="bwl"></span></td>
<td><span id="bwlh"></span></td>
<td><span id="bwlc"></span></td>
<td><span id="bwld"></span></td>
</tr>
<tr>
<td>Wetted area (m2)</td>
<td><span id="Awet"></span></td>
<td><span id="Aweth"></span></td>
<td><span id="Awetc"></td>
<td><span id="awetd"></td>
</tr>
<tr>
<td>Waterplane Area (m2)</td>
<td><span id="Awp"></span></td>
<td><span id="Awph"></span></td>
<td><span id="Awpc"></span></td>
<td><span id="awpd"></span></td>
</tr>
<tr>
<td>Cb</td>
<td><span id="Cb"></span></td>
<td><span id="Cbh"></span></td>
<td><span id="cbc"></span></td>
<td><span id="cbd"></span></td>
</tr>
<tr>
<td>LCB (m)</td>
<td><span id="LCB"></span></td>
<td><span id="LCBh"></span></td>
<td><span id="LCBc"></span></td>
<td><span id="LCBd"></span></td>
</tr>
<tr>
<td>LCF (m)</td>
<td><span id="LCF"></span></td>
<td><span id="LCFh"></span></td>
<td><span id="LCFc"></span></td>
<td><span id="LCFd"></span></td>
</tr>
<tr>
<td>KB (m)</td>
<td><span id="KB"></span></td>
<td><span id="KBh"></span></td>
<td><span id="KBc"></span></td>
<td><span id="KBd"></span></td>
</tr>
<tr>
<td>KG (m)</td>
<td><span id="KG"></span></td>
<td><span id="KGh"></span></td>
<td><span id="KGc"></span></td>
<td><span id="KGd"></span></td>
</tr>
<tr>
<td>BM (m)</td>
<td><span id="BM"></span></td>
<td><span id="BMh"></span></td>
<td><span id="BMc"></span></td>
<td><span id="BMd"></span></td>
</tr>
<tr>
<td>GM (m)</td>
<td><span id="GM"></span></td>
<td><span id="GMh"></span></td>
<td><span id="GM2"></span></td>
<td><span id="GMd"></span></td>
</tr>
<tr>
<td>Trim (m)</td>
<td><span id="trimd"></span></td>
<td><span></span></td>
<td><span id="trimdc"></span></td>
<td><span id="trimdd"></span></td>
</tr>
<tr>
<td>Trim (º)</td>
<td><span id="trima"></span></td>
<td><span></span></td>
<td><span id="trimac"></span></td>
<td><span id="trimad"></span></td>
</tr>
<tr>
<td>Draft at FP (m)</td>
<td><span id="draftfp"></span></td>
<td><span id="draftfph"></td>
<td><span id="draftfpc"></span></td>
<td><span id="draftfpd"></span></td>
</tr>
<tr>
<td>Draft AP (m)</td>
<td><span id="draftap"></span></td>
<td><span id="draftaph"></span></td>
<td><span id="draftapc"></span></td>
<td><span id="draftapd"></span></td>
</tr>
<tr>
<td>Heel (m)</td>
<td><span id="heel"></span></td>
<td><span></span></td>
<td><span id="heelc"></span></td>
<td><span></span></td>
</tr>
</body>
</table>
<h2>General arrangement</h2>
<h3>Specification</h3>
<table class="table">
<thead>
<tr>
<th>ID</th>
<th>Lenght</th>
<th>Breadth</th>
<th>Height</th>
<th>Deadweight</th>
</tr>
</thead>
<body>
<tr>
<td><span>Block0</span></td>
<td><span id="bl0"></span><span> m</span></td>
<td><span id="bb0"></span><span> m</span></td>
<td><span id="bh0"></span><span> m</span></td>
<td><span id="bwe0"></span><span> kg</span></td>
</tr>
<tr>
<td><span>Block0</span></td>
<td><span id="bl1"></span><span> m</span></td>
<td><span id="bb1"></span><span> m</span></td>
<td><span id="bh1"></span><span> m</span></td>
<td><span id="bwe1"></span><span> kg</span></td>
</tr>
<tr>
<td><span>Block2</span></td>
<td><span id="bl2"></span><span> m</span></td>
<td><span id="bb2"></span><span> m</span></td>
<td><span id="bh2"></span><span> m</span></td>
<td><span id="bwe2"></span><span> kg</span></td>
</tr>
</body>
</table>
<h3>Calculations</h3>
<table class="table">
<thead>
<th>Variable</th>
<th>Hand value</th>
<th>Calculated value</th>
</thead>
<body>
<tr>
<td>Deadweight (kg)</td>
<td><span id="deadweight"></span></td>
<td><span id="deadweightc"></span>
<td>
<td><span></span></td>
</tr>
<tr>
<td>Total area (m2)</td>
<td><span id="bareac"></span></td>
<td><span id="barea"></span>
<td>
<td><span></span></td>
</tr>
<tr>
<td>Total Volume (m3)</td>
<td><span id="bvolc"></span></td>
<td><span id="bvol"></span>
<td>
<td><span></span></td>
</tr>
</body>
</table>
<div id="myDiv" style="width: 480px; height: 400px;">
</div>
</div>
<button onclick="hide()" name="button">Click to read the explanation of the method</button><br><br><br><br>
<div id="hide">
<div class="col-md-12 text-center">
<p>The method above aims to validate the calculation method
presented by vessel.js file. The main idea is to use a simple hull
geometry (presented here by a triangular hull) and compare it with two
other calculation methods: analical formulation and numerical method
using maxsurf/hidromax software. The hand and Hidromax calculation
is specifical for the triangular geometry described in blockCase.json
and it may not work fine for other types of geometry. The explanation
of the steps followed by the <a href="https://github.com/shiplab/vesseljs/blob/master/examples/blockCase_compare.html">
open code</a> are presented bellow.</p>
<div>
</div>
</div>
<ol>
<h2>
<li>Use the library and vessel.js to calculate hydrostatics</li>
</h2>
<ul>
<h4>
<li>Get all compartments informations and calculate centers of gravity</li>
</h4>
<p><code>THREE.FileLoader().load("data/ship_specifications/blockCase.json", useFileData);</code></p>
<p><code>let block0 = ship.baseObjects[Object.keys(ship.baseObjects)[0]];</code></p>
<p><code>let block0 = ship.baseObjects[Object.keys(ship.baseObjects)[1]];</code></p>
<p><code>let block0 = ship.baseObjects[Object.keys(ship.baseObjects)[2]];</code></p>
<h4>
<li>Calculate draft from deadweight</li>
</h4>
<p><code>let a = ship.calculateStability();</code></p>
<p><code>let draftc = a.T.toFixed(3);</code></p>
<h4>
<li>Use the draft to calculate hydrostatics</li>
</h4>
<p><code>let ha = ship.structure.hull.calculateAttributesAtDraft(draftc);</code></p>
<h4>
<li>List all the calculated values under "Calculated value" column</li>
</h4>
</ul>
<br>
<h2>
<li>Reproduce all values by analytical calculations method</li>
</h2>
<ul>
<h4>
<li>Get the same draft outputed from the vessel.js</li>
</h4>
<p><code>let draftms = a.T;</code></p>
<h4>
<li>Calculate hidrostatics and list values under "Hand value" column</li>
</h4>
</ul>
<br>
<h2>
<li>Insert data in the maxsurf program</li>
</h2>
<ul>
<h4>
<li>Calculate hidrostatics and list values under " Calculated on Hidromax" column</li>
</h4>
</ul>
</ol>
<script type="module">
"use strict";
// Import three.js and OrbitControls modules
import * as THREE from "./3D_engine/three_r126.js";
import { OrbitControls } from "./3D_engine/OrbitControls.js";
// Import Vessel.js module
import * as Vessel from "../source/jsm/vessel.js";
// Import Ship3D module
import { Ship3D } from "../source/jsm/3D_engine/Ship3D.js";
// Import Skybox module
import { Skybox } from "../examples/3D_engine/skybox.js";
// Import Ocean module
import { Ocean } from "../examples/3D_engine/Regular_ocean.js";
// Create scene+
var renderer, scene, camera, controls, ship3D;
//Ready renderer and scene
(function() {
renderer = new THREE.WebGLRenderer({antialias: true});
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setClearColor(0xA9CCE3, 1);
// get the div that will hold the renderer
var container = document.getElementById('3d');
//renderer.setSize(container.clientWidth, container.clientHeight);
// add the renderer to the div
container.appendChild(renderer.domElement);
scene = new THREE.Scene();
//Camera and controls:
camera = new THREE.PerspectiveCamera(50);
camera.up.set(0, 0, 1);
scene.add(camera);
controls = new OrbitControls(camera, renderer.domElement);
//Respond to window resize:
function onResize() {
renderer.setSize(container.clientWidth, container.clientHeight);
camera.aspect = container.clientWidth / container.clientHeight;
camera.updateProjectionMatrix();
}
window.addEventListener("resize", onResize);
onResize(); //Ensure the initial setup is good too
//Add lights:
scene.add(new THREE.AmbientLight(0xffffff, 0.3));
scene.add(function() {
let sun = new THREE.DirectionalLight(0xffffff, 1);
sun.position.set(1, 1, 1);
return sun;
}());
})();
// read file from user
function readSingleFile(e) {
var file = e.target.files[0];
if (!file) {
return;
}
var reader = new FileReader();
reader.onload = function(e) {
var contents = e.target.result;
//call common function for user files and server files
useFileData(contents);
}
reader.readAsText(file);
}
//Load sample file:
new THREE.FileLoader().load("ship_specs/blockCase.json", useFileData);
function useFileData(contents) {
var shipspec = JSON.parse(contents);
displayContents(shipspec);
var ship = new Vessel.Ship(shipspec);
if (ship3D !== undefined) {
scene.remove(ship3D);
}
ship3D = new Ship3D(ship, {
stlPath: "3D_models/STL/various"
});
scene.add(ship3D);
let LOA = ship.structure.hull.attributes.LOA;
camera.position.set(0.7 * LOA, 0.7 * LOA, 0.7 * LOA);
controls.update();
animate();
//Ship specification
let BOA = ship.structure.hull.attributes.BOA
let depth = ship.structure.hull.attributes.Depth
let draftdesign = ship.designState.calculationParameters.Draft_design
let speeddesign = ship.designState.calculationParameters.speed
document.getElementById("LOA").innerHTML = LOA;
document.getElementById("BOA").innerHTML = BOA;
document.getElementById("depth").innerHTML = depth;
document.getElementById("draftdesign").innerHTML = draftdesign; //this part does not makes sense
document.getElementById("speeddesign").innerHTML = speeddesign;
//calculate stability
//1. Make all calculations with library
// 1.1 Does all blocks calculations
//baseObjects
let lightweight = ship.structure.hull.attributes.lightweight;
let block0 = ship.baseObjects[Object.keys(ship.baseObjects)[0]];
let block1 = ship.baseObjects[Object.keys(ship.baseObjects)[1]];
let block2 = ship.baseObjects[Object.keys(ship.baseObjects)[2]];
let bl0 = block0.boxDimensions.length;
let bb0 = block0.boxDimensions.breadth;
let bh0 = block0.boxDimensions.height;
let bwe0 = block0.weightInformation.lightweight;
let bl1 = block1.boxDimensions.length;
let bb1 = block1.boxDimensions.breadth;
let bh1 = block1.boxDimensions.height;
let bwe1 = block1.weightInformation.lightweight;
let bl2 = block2.boxDimensions.length;
let bb2 = block2.boxDimensions.breadth;
let bh2 = block2.boxDimensions.height;
let bwe2 = block2.weightInformation.lightweight;
let deadweightc = bwe0 + bwe1 + bwe2;
let barea = bl0 * bb0 + bl1 * bb1 + bl2 * bb2;
let bvol = bl0 * bb0 * bh0 + bl1 * bb1 * bh1 + bl2 * bb2 * bh2;
document.getElementById("bl0").innerHTML = bl0;
document.getElementById("bb0").innerHTML = bb0;
document.getElementById("bh0").innerHTML = bh0;
document.getElementById("bwe0").innerHTML = bwe0;
document.getElementById("bl1").innerHTML = bl1;
document.getElementById("bb1").innerHTML = bb1;
document.getElementById("bh1").innerHTML = bh1;
document.getElementById("bwe1").innerHTML = bwe1;
document.getElementById("bl2").innerHTML = bl2;
document.getElementById("bb2").innerHTML = bb2;
document.getElementById("bh2").innerHTML = bh2;
document.getElementById("bwe2").innerHTML = bwe2;
document.getElementById("barea").innerHTML = barea;
document.getElementById("bvol").innerHTML = bvol;
//baseObjects calculated values
let bareac = 84;
let bvolc = 240;
document.getElementById("bareac").innerHTML = bareac;
document.getElementById("bvolc").innerHTML = bvolc;
//Elias comments: calculated stability values a uses a calculated draft, whereas the other values below are calculated from a given "design draft".
//calculated values
// 1.2 Calculate draft from deadweight:
let a = ship.calculateStability();
let weight = a.w;
let KGc = a.KG.toFixed(3);
let draftc = a.T.toFixed(3);
let trimac = a.trim.toFixed(3);
let draftfpc = a.draftfp.toFixed(3);
let draftapc = a.draftap.toFixed(3);
let trimdc = a.trimd.toFixed(3);
let heelc = a.heel.toFixed(3);
// 1.3 Then use the draft to calculate hydrostatics:
let ha = ship.structure.hull.calculateAttributesAtDraft(draftc);
let KBc = ha.KB.toFixed(3);
let BMc = ha.BMt.toFixed(3);
let GM2 = a.GMt.toFixed(3);
let LCBc = ha.LCB;
let LCFc = ha.LCF;
let lwlc = ha.LWL;
let bwlc = ha.BWL;
let Awetc = ha.As;
let Awpc = ha.Awp;
let cbc = ha.Cb;
//Not sure if the values are also considering water density
let dispc = lwlc * bwlc * cbc * draftc * 1.025; //considering 1.025 t/m³ the water density
// 1.4 list all the calculated values under "Calculated value" column
document.getElementById("KBc").innerHTML = KBc;
document.getElementById("KGc").innerHTML = KGc;
document.getElementById("BMc").innerHTML = BMc;
document.getElementById("GM2").innerHTML = GM2; //To use in same draft
document.getElementById("draftc").innerHTML = draftc;
document.getElementById("draftfpc").innerHTML = draftfpc;
document.getElementById("draftapc").innerHTML = draftapc;
document.getElementById("trimdc").innerHTML = trimdc;
document.getElementById("trimac").innerHTML = trimac;
document.getElementById("heelc").innerHTML = heelc;
document.getElementById("lwlc").innerHTML = lwlc.toFixed(3);
document.getElementById("bwlc").innerHTML = bwlc.toFixed(3);
document.getElementById("Awetc").innerHTML = Awetc.toFixed(3);
document.getElementById("Awpc").innerHTML = Awpc.toFixed(3);
document.getElementById("cbc").innerHTML = cbc.toFixed(3);
document.getElementById("LCBc").innerHTML = LCBc.toFixed(3);
document.getElementById("LCFc").innerHTML = LCFc.toFixed(3);
document.getElementById("lightweight").innerHTML = lightweight.toFixed(3);
document.getElementById("deadweightc").innerHTML = deadweightc.toFixed(3);
document.getElementById("dispc").innerHTML = dispc.toFixed(3);
// The elements bellow are the calculated one that were in the previous code @ferrari212
// let disp = 100;
// let draftms = 2.028;
// let draftap = 2.082;
// let draftfp = 1.974;
// let lwl = 20;
// let bwl = 5.206;
// let Awet = 136.989;
// let Awp = 98.95;
// let Cb = disp / (draftms * lwl * bwl * 1.025);
// let LCB = 9.636;
// let LCF = 9.818;
// let KB = 1.319;
// let KG = 3.525;
// let BM = 2.061;
// let GM = KB + BM - KG;
// let trimd = 0.108;
// let trima = 0.618;
// let heel = 0;
// let maxmom = 40.072;
// let shear = 13.327;
// let deadweight = 85000;
// 2. Reproduce all values by hand calculations
// The following data are calculated from LOA, BOA, depth, and draft
// calculated in the above steps @ferrari212
let draftms = a.T; //Comparing same drafts
let disp = 1.025 * LOA * (BOA / depth) * draftms * draftms / 2;
let lwl = LOA;
let bwl = (BOA / depth) * draftms;
let Awet = 2 * LOA * Math.sqrt(Math.pow(bwl / 2, 2) + Math.pow(draftms, 2)) + bwl * draftms;
let Awp = LOA * bwl;
let Cb = disp / (draftms * lwl * bwl * 1.025);
let LCB = LOA / 2;
let LCF = LOA / 2;
let KB = 2 * draftms / 3;
let KG = a.KG;
let BM = LOA * Math.pow(bwl, 3) * 1.025 / (12 * disp);
let GM = KB + BM - KG;
let BMl = bwl * Math.pow(LOA, 3) * 1.025 / (12 * disp);
let GMl = KB + BMl - KG;
// avaiable just for small angles < 3°
// this calculation can be incorporated to Vessesl.js with no problem
let trima = (LCB - weight.cg.x) / GMl;
let draftfp = 0;
let draftap = 0;
let trimd = 0;
if (trima < Math.tan(3 * Math.PI / 180)) {
draftfp = draftms - (LOA - LCF) * trima;
draftap = draftms + (LCF) * trima;
trimd = draftfp - draftap;
} else {
draftfp = null;
draftap = null;
trimd = null;
}
//change the trim for angles
trima = Math.atan(trima) * 180 / Math.PI;
let heel = weight.cg.y / GM;
//change the hell for meters
heel *= BOA;
let deadweight = 85000;
document.getElementById("draftms").innerHTML = draftms.toFixed(3);
document.getElementById("disp").innerHTML = disp.toFixed(3);
document.getElementById("draftfp").innerHTML = draftfp.toFixed(3);
document.getElementById("draftap").innerHTML = draftap.toFixed(3);
document.getElementById("lwl").innerHTML = lwl.toFixed(3);
document.getElementById("bwl").innerHTML = bwl.toFixed(3);
document.getElementById("Awet").innerHTML = Awet.toFixed(3);
document.getElementById("Awp").innerHTML = Awp.toFixed(3);
document.getElementById("Cb").innerHTML = Cb.toFixed(3);
document.getElementById("LCB").innerHTML = LCB.toFixed(3);
document.getElementById("LCF").innerHTML = LCF.toFixed(3);
document.getElementById("KB").innerHTML = KB.toFixed(3);
document.getElementById("KG").innerHTML = KG.toFixed(3);
document.getElementById("BM").innerHTML = BM.toFixed(3);
document.getElementById("GM").innerHTML = GM.toFixed(3);
document.getElementById("trimd").innerHTML = trimd.toFixed(3);
document.getElementById("trima").innerHTML = trima.toFixed(3);
document.getElementById("heel").innerHTML = heel.toFixed(3);
document.getElementById("deadweight").innerHTML = deadweight.toFixed(3);
// 3. Reproduce the calculations using Maxsurf
let disph = 282.8;
let drafth = 3.322;
let draftfph = 3.352;
let draftaph = 3.292;
let lwlh = 20;
let bwlh = 8.305;
let Aweth = 240.301;
let Awph = 166.100;
let Cbh = 0.500
let LCBh = 10.000;
let LCFh = 10.000;
let KBh = 2.215;
let KGh = 3.525;
let BMh = 3.460;
let GMh = KBh + BMh - KGh;
document.getElementById("disph").innerHTML = disph.toFixed(3);
document.getElementById("drafth").innerHTML = drafth.toFixed(3);
document.getElementById("draftfph").innerHTML = draftfph.toFixed(3);
document.getElementById("draftaph").innerHTML = draftaph.toFixed(3);
document.getElementById("lwlh").innerHTML = lwlh.toFixed(3);
document.getElementById("bwlh").innerHTML = bwlh.toFixed(3);
document.getElementById("Aweth").innerHTML = Aweth.toFixed(3);
document.getElementById("Awph").innerHTML = Awph.toFixed(3);
document.getElementById("Cbh").innerHTML = Cbh.toFixed(3);
document.getElementById("LCBh").innerHTML = LCBh.toFixed(3);
document.getElementById("LCFh").innerHTML = LCFh.toFixed(3);
document.getElementById("KBh").innerHTML = KBh.toFixed(3);
document.getElementById("KGh").innerHTML = KGh.toFixed(3);
document.getElementById("BMh").innerHTML = BMh.toFixed(3);
document.getElementById("GMh").innerHTML = GMh.toFixed(3);
//stability small angles, only LW
let GZmax = [];
let degmax = [];
let KGlw = depth * 2 / 3;
let KBlw = draftdesign / 3 * 2;
let BMlw = 1 / 12 * Math.pow(bwlc, 3) * LOA / (LOA * draftdesign * bwlc / 2);
let GMlw = KBlw + BMlw - KGlw;
let GZ = [0];
let deg = [0];
// Not sure if the way of calculation is right. GM vary because we
// do not have parallel sides. The formula is rigth for small variation in GM
// and they may be applied up to 3 degree
for (let i = 0; i < 3; i++) {
let ideg = Math.sin(i / 180 * Math.PI);
GZmax.push(GMlw * ideg);
degmax.push(i);
}
//% diff
let KBd = (1 - KB / KBc) * 100;
let KGd = (1 - KG / KGc) * 100;
let BMd = (1 - BM / BMc) * 100;
let GMd = (1 - GM / GM2) * 100;
let trimdd = (1 - trimd / trimdc) * 100;
let trimad = (1 - trima / trimac) * 100;
let draftd = (1 - draftms / draftc) * 100;
let draftfpd = (1 - draftfp / draftfpc) * 100;
let draftapd = (1 - draftap / draftapc) * 100;
let lwld = (1 - lwl / lwlc) * 100;
let bwld = (1 - bwl / bwlc) * 100;
let awetd = (1 - Awet / Awetc) * 100;
let awpd = (1 - Awp / Awpc) * 100;
let cbd = (1 - Cb / cbc) * 100;
let LCBd = (1 - LCB / LCBc) * 100;
let LCFd = (1 - LCF / LCFc) * 100;
let dispd = (1 - disp / dispc) * 100;
document.getElementById("KBd").innerHTML = KBd.toFixed(3);
document.getElementById("KGd").innerHTML = KGd.toFixed(3);
document.getElementById("BMd").innerHTML = BMd.toFixed(3);
document.getElementById("GMd").innerHTML = GMd.toFixed(3);
document.getElementById("trimdd").innerHTML = trimdd.toFixed(3);
document.getElementById("trimad").innerHTML = trimad.toFixed(3);
document.getElementById("draftd").innerHTML = draftd.toFixed(3);
document.getElementById("draftfpd").innerHTML = draftfpd.toFixed(3);
document.getElementById("draftapd").innerHTML = draftapd.toFixed(3);
document.getElementById("lwld").innerHTML = lwld.toFixed(3);
document.getElementById("bwld").innerHTML = bwld.toFixed(3);
document.getElementById("awetd").innerHTML = awpd.toFixed(3);
document.getElementById("awpd").innerHTML = awpd.toFixed(3);
document.getElementById("cbd").innerHTML = cbd.toFixed(3);
document.getElementById("LCBd").innerHTML = LCBd.toFixed(3);
document.getElementById("LCFd").innerHTML = LCFd.toFixed(3);
document.getElementById("dispd").innerHTML = dispd.toFixed(3);
//GZ curve
let maxang = Math.atan(ship.structure.hull.attributes.Depth / (ship.structure.hull.attributes.BOA / 2)) / Math.PI * 180;
let maxanground = Math.round(maxang / 10) * 10
//loop for degrees of heel
let GZ2 = [];
let deg2 = [];
//To let the areas equal is not enought because the draft is changing
//it is necessary to let volumes equal @ferrari212 to keep up
// the total displacement of the ship
let aini = bwl * draftms / 2; //inicial area
//the loop is not valid for values above 95°
for (let i = 1; i < 85; i += 1) {
//loop for moving the wl through the model
for (let ii = -1.5; ii < 2; ii += 0.001) { /*proper value 0.00001*/
//right line of the hull mr = slope and br = b from y=mx+b
//Why do not use br = 0 if the coordinate system is on keel @ferrari212?
let mr = (ship.structure.hull.attributes.Depth / (ship.structure.hull.attributes.BOA / 2));
let br = ship.structure.hull.attributes.Depth - mr * ship.structure.hull.attributes.BOA / 2;
//left line of the hull ml = slope and bl = b from y=mx+b
let ml = (ship.structure.hull.attributes.Depth / (-ship.structure.hull.attributes.BOA / 2));
let bl = ship.structure.hull.attributes.Depth - mr * (ship.structure.hull.attributes.BOA / 2);
//water line mwl = slope and bwl = b from y=mx+b
let mwl = Math.tan(i * Math.PI / 180);
// Consider that ii will change through z axis the draft of the ship @ferarri212
// let bwl = ship.designState.calculationParameters.Draft_design - mwl * ii ;
let bwl = (draftms - ii);
//intersection betwen waterline and right hull line
let answer1xr = (bwl - br) / (mr - mwl);
let answer1yr = mr * answer1xr - br;
//intersection betwen waterline and left hull line
let answer1xl = (bwl - bl) / (ml - mwl);
let answer1yl = ml * answer1xl - bl;
//intersection with main deck (wl)
let answerdx = (ship.structure.hull.attributes.Depth - bwl) / mwl;
//iteration to find equal areas
//I do not got what this basestart means? @ferrari212
//if it the base of the new triangle why does ii is reduced here if it represents the line hight? @ferrari212
// let basestartl = ship.designState.calculationParameters.Draft_design / mr +ii;
// let basestartr = ship.designState.calculationParameters.Draft_design / mr -ii;
let basestartl = bwl / mr;
let basestartr = bwl / mr;
//measure areas
let al = 0;
let ar = 0;
let arest = 0;
let topb = 0;
let at = basestartr * bwl; // Area of new draft @ferrari212
let at2 = BOA * depth / 2;
let comp = 10;
if (answerdx < ship.structure.hull.attributes.BOA / 2) {
arest = (answerdx + BOA / 2) * (depth - answer1yl) / 2;
comp = aini - at2 + arest;
}
else {
al = Math.abs((answer1yl - draftms) * (basestartl) / 2);
ar = Math.abs((answer1yr - draftms) * (basestartr) / 2);
comp = aini - ar + al - at;
}
//compare areas
// let comp = (ar.toFixed(3) - al.toFixed(3));
if (Math.abs(comp) <= 0.01) {
let py = 0;
let px = 0;
//calculate perpendicular line
let ppmwl = - 1 / mwl;
// I can not understand the results by ppbwl @ferrari212
// How do they know where the center of geometry is by this formula? @ferrari212
// let ppbwl = ship.designState.calculationParameters.Draft_design - (basestartl - ship.designState.calculationParameters.Draft_design / mr) * ppmwl;
// Using pondered mean of areas by its center of gravity @ferrari212
// Center of gravity from each value calculated by https://formulas.tutorvista.com/math/centroid-formula.html
if (answerdx < ship.structure.hull.attributes.BOA / 2) {
px = (((-BOA / 2 + answer1xl + answerdx) / 3) * (-arest)) / (-arest + at2);
py = (((answer1yl + 2 * depth) / 3) * (-arest) + (2 * depth / 3) * at2) / (-arest + at2);
// console.log('Mr = '+ 180*Math.atan(mwl)/Math.PI +' Bwl = '+ bwl);
// console.log('This is the ordinate pair: x = %.1f ; y = %.1f ; n = 2', px, py);
}
else {
px = (answer1xl + answer1xr) / 3;
py = (answer1yl + answer1yr) / 3;
// console.log('Mr = '+ 180*Math.atan(mwl)/Math.PI +' Bwl = '+ bwl);
// console.log('This is the ordinate pair: x = %.1f ; y = %.1f ; n = 1', px, py);
}
// calculate distance to K
let ppbwl = py - ppmwl * px; // Finding by the center point on the area
let KNnew = ppbwl / Math.sqrt(Math.pow(-ppmwl, 2) + 1)
let radnew = (i / 180) * Math.PI;
let GZnew = KNnew - Math.sin(radnew) * KGlw
deg.push(i)
GZ.push(GZnew);
break;
}
}
}
for (var ii = 10; ii < 110; ii += 10) {
let rad = (ii / 180) * Math.PI;
let ideg2 = Math.sin(rad);
let KN = [0.993, 1.608, 2.013, 2.313, 2.525, 2.652, 2.695, 2.656, 2.539, 2.353, 2.110] //This was the calculated in hydromax by @ferrari212
let a = (ii / 10) - 1;
let kgsin = KGlw * ideg2
GZmax.push(KN[a] - kgsin);
degmax.push(ii)
}
let traze1 = {
x: deg,
y: GZ,
type: "scatter",
name: "Handmode"
}
let traze2 = {
x: degmax,
y: GZmax,
type: "scatter",
name: "Maxsurf"
}
let layout = {
title: "GZ Curve",
xaxis: {
title: "degrees (º)"
},
yaxis: {
title: "GZ (m))"
}
}
let data1 = [traze1, traze2];
Plotly.newPlot('myDiv', data1, layout)
}
function animate() {
requestAnimationFrame(animate);
renderer.render(scene, camera);
}
//Activates the hide button
function hide() {
var div = document.getElementById('hide');
if (div.style.display == 'none') {
var finalPage = $(document).height()
div.style.display = "";
$("html, body").animate({scrollTop: finalPage}, 'slow');
}
else {
div.style.display = 'none';
}
}
document.onload = hide();
// display pretty JSON
function displayContents(jsonData) {
let fileCont = document.getElementById("file-content");
fileCont.innerHTML = "";
fileCont.appendChild(
renderjson(jsonData)
);
}
// Catch file browse
document.getElementById('file-input')
.addEventListener('change', readSingleFile, false)
//compare values