se5a

public static DVec.Vector2[] EllipseFullMtxSweep(double semiMaj, double eccentricity, double tilt, double start,
    double sweep, int numPoints)
{

    //convert ellipse angles to circle angles. 
    double b = semiMaj * Math.Sqrt(1 - eccentricity * eccentricity);
    start = Math.Atan(semiMaj / b * Math.Tan(start));
    sweep = Math.Atan(semiMaj / b * Math.Tan(sweep));
    double end = start + sweep;
    double Δθ = 2 * Math.PI / (numPoints - 1) * Math.Sign(sweep); //arc increment for a whole circle

se5a

//taken from: https://doi.org/10.1093/comjnl/14.1.81
public static (int x, int y)[] EllipseArrayFromPaper(double semiMaj, double semiMin, double tilt, int numPoints)
{
    (int x, int y)[] points = new (int x, int y)[numPoints];

    var n = numPoints;
    var a = semiMaj;
    var b = semiMin;
    var xc = 0; //this is the center position of the ellipse;
    var yc = 0;

se5a

using System;
using System.Collections.Generic;

namespace Pulsar4X.Orbital
{
        public class Matrix2d
    {
        double[] X = new double[3] { 1, 0, 0 };
        double[] Y = new double[3] { 0, 1, 0};
        double[] Z = new double[3] {0, 0, 1};

se5a

unsafe
{
    string rf = "Resources";
    
    ImFontConfig* rawPtr = ImGuiNative.ImFontConfig_ImFontConfig();
    ImFontConfigPtr config = new ImFontConfigPtr(rawPtr);
    config.PixelSnapH = true;
    config.MergeMode = true;
    
    ImFontAtlasPtr fontAtlas = ImGui.GetIO().Fonts;

se5a

        public static bool Switch2State(string label, ref bool state, string leftState = "Off", string rightState = "On")
        {
            int intState = Convert.ToInt32(state);
            string strstate = leftState;
            if (state == true)
                strstate = rightState;
            var txtWid = Math.Max(ImGui.CalcTextSize(leftState).X, ImGui.CalcTextSize(rightState).X);
            ImGui.PushItemWidth(txtWid * 3);
            var cpos = ImGui.GetCursorPos();
            if(ImGui.SliderInt(label,ref intState, 0, 1, "" ))

se5a

public static class SizesDemo
{
    enum FrameOfReference : byte
    {
        Screen,
        Window,
    }
    static ImDrawListPtr _wdl = ImGui.GetForegroundDrawList();
    static Vector2 _windowPos = new Vector2();
    static UInt32 _lineColour = ImGui.GetColorU32(new Vector4(1, 0, 0, 1));

se5a

        private int _bloSelectedIndex = -1;
        void BorderListOptionsWiget()
        {
            string[] items = new string[_listfoo.Count];
            for (int i = 0; i < _listfoo.Count; i++)
            {
                items[i] = _listfoo[i].name;
            }
            BorderGroup.Begin("Border List Options: ");
            BorderListOptions.Begin("blo", items, ref _bloSelectedIndex, 64);

se5a

    public static class BorderListOptions
    {
        
        private static Vector2 _labelSize = new Vector2();
        private static float _xleft;
        private static float _xcentr;
        private static float _xright;

        private static float _ytop;
        private static float _yctr1;

se5a

======================
Proton: 1586972103 proton-5.0-6
SteamGameId: 14948375713730789376
Command: ['/mnt/98448323-4372-4c8a-904a-30b587cc3685/Games/Aurora/Aurora.exe', '--wine']
Options: {'forcelgadd'}
======================
ERROR: ld.so: object '/home/se5a/.steam/ubuntu12_32/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
ERROR: ld.so: object '/home/se5a/.steam/ubuntu12_64/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS64): ignored.
ERROR: ld.so: object '/home/se5a/.steam/ubuntu12_64/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS64): ignored.
ERROR: ld.so: object '/home/se5a/.steam/ubuntu12_32/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.

se5a

public class BorderGroup
{
    private static Vector2[] _startPos = new Vector2[8];
    private static Vector2[] _labelSize = new Vector2[8];
    private static uint[] _colour = new uint[8];
    private static byte _nestIndex = 0;
    private static float _dentMulitpier = 3;
    public static void BeginBorder(string label, uint colour)
    {
        ImGui.PushID(label);