.vscode/settings.json

@@ -1,5 +1,4 @@
 {
     "editor.formatOnSave": true,
-    "editor.formatOnType": true,
+    "editor.formatOnType": true
-    "vscode-neovim.neovimExecutablePaths.linux": "/usr/bin/nvim"
 }

scenes/Main.tscn

@@ -1,14 +1,12 @@
 [gd_scene load_steps=4 format=2]
 
-[ext_resource path="res://scenes/trains/Train.tscn" type="PackedScene" id=1]
+[ext_resource path="res://scenes/Train.tscn" type="PackedScene" id=1]
-[ext_resource path="res://scenes/trains/Railway.tscn" type="PackedScene" id=2]
+[ext_resource path="res://scenes/Railway.tscn" type="PackedScene" id=2]
 [ext_resource path="res://scenes/OrbitCamera.tscn" type="PackedScene" id=3]
 
 [node name="Main" type="Node2D"]
 
 [node name="Train" parent="." instance=ExtResource( 1 )]
-_speed = 5.0
-_railwayPath = NodePath("../Railway")
 
 [node name="DirectionalLight" type="DirectionalLight" parent="."]
 transform = Transform( 0.515898, 0.606099, -0.605386, -0.393123, 0.795389, 0.461314, 0.76112, -2.26831e-08, 0.648611, 0, 0, 0 )
@@ -16,3 +14,4 @@ transform = Transform( 0.515898, 0.606099, -0.605386, -0.393123, 0.795389, 0.461
 [node name="OrbitCamera" parent="." instance=ExtResource( 3 )]
 
 [node name="Railway" parent="." instance=ExtResource( 2 )]
+script = null

scenes/RailNode.tscn

@@ -0,0 +1,22 @@
+[gd_scene load_steps=2 format=2]
+
+[sub_resource type="CSharpScript" id=1]
+script/source = "using Godot;
+using System;
+
+public class RailNode : Spatial
+{
+    public override void _Ready()
+    {
+
+    }
+
+//  public override void _Process(float delta)
+//  {
+//
+//  }
+}
+"
+
+[node name="Spatial" type="Spatial"]
+script = SubResource( 1 )

scenes/Railway.tscn

@@ -0,0 +1,23 @@
+[gd_scene load_steps=4 format=2]
+
+[ext_resource path="res://scripts/Railway.cs" type="Script" id=1]
+
+[sub_resource type="Curve3D" id=1]
+_data = {
+"points": PoolVector3Array( 0, 0, 0, 0, 0, 0, 8.10688, -1.81506, 7.57791, 0, 0, 0, 0, 0, 0, -4.46766, -3.67929, 0.175438, 0, 0, 0, 0, 0, 0, -6.79476, 2.00362, -6.79993, 0, 0, 0, 0, 0, 0, 5.56111, 6.33345, -1.84912, 0, 0, 0, 0, 0, 0, 11.2517, 3.50708, 4.91382, 0, 0, 0, 0, 0, 0, 14.9168, -0.251479, 11.0718 ),
+"tilts": PoolRealArray( 0, 0, 0, 0, 0, 0 )
+}
+
+[sub_resource type="SpatialMaterial" id=2]
+flags_unshaded = true
+vertex_color_use_as_albedo = true
+
+[node name="Railway" type="Path"]
+curve = SubResource( 1 )
+script = ExtResource( 1 )
+_color = Color( 0, 1, 0.133333, 1 )
+
+[node name="ImmediateGeometry" type="ImmediateGeometry" parent="."]
+material_override = SubResource( 2 )
+
+[connection signal="curve_changed" from="." to="." method="OnPathCurveChanged"]

scenes/Train.tscn

@@ -0,0 +1,12 @@
+[gd_scene load_steps=2 format=2]
+
+[ext_resource path="res://scripts/Train.cs" type="Script" id=1]
+
+[node name="Train" type="Node"]
+script = ExtResource( 1 )
+
+[node name="CSGBox" type="CSGBox" parent="."]
+transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.5, 0 )
+width = 1.0
+height = 1.0
+depth = 4.0

scenes/trains/Bogie.tscn

@@ -1,9 +0,0 @@
-[gd_scene format=2]
-
-[node name="Bogey" type="Spatial"]
-
-[node name="CSGBox" type="CSGBox" parent="."]
-transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.2, 0 )
-width = 0.9
-height = 0.4
-depth = 1.1

scenes/trains/Rail.tscn

@@ -1,25 +0,0 @@
-[gd_scene load_steps=2 format=2]
-
-[sub_resource type="Curve3D" id=1]
-_data = {
-"points": PoolVector3Array(  ),
-"tilts": PoolRealArray(  )
-}
-
-[node name="Rail" type="Spatial"]
-
-[node name="Path" type="Path" parent="."]
-curve = SubResource( 1 )
-
-[node name="CSGPolygon" type="CSGPolygon" parent="."]
-polygon = PoolVector2Array( -0.383256, -0.00220253, -0.383256, 1.0066, 0.383256, 1.00219, 0.383256, -0.00220253 )
-mode = 2
-path_node = NodePath("../Path")
-path_interval_type = 0
-path_interval = 1.0
-path_simplify_angle = 0.0
-path_rotation = 2
-path_local = false
-path_continuous_u = true
-path_u_distance = 1.0
-path_joined = false

scenes/trains/Railway.tscn

@@ -1,47 +0,0 @@
-[gd_scene load_steps=3 format=2]
-
-[ext_resource path="res://scripts/trains/Railway.cs" type="Script" id=1]
-
-[sub_resource type="Curve3D" id=1]
-bake_interval = 0.01
-_data = {
-"points": PoolVector3Array( -2.68413, 0, -1.21546, 2.68413, 0, 1.21546, -20.005, 0, -8.27961, -0.202576, 0, -2.12705, 0.202576, 0, 2.12705, -15.5484, 0.00448608, -2.35426, -1.06352, 0, -2.88671, 1.06352, 0, 2.88671, -16.1055, 0.000946045, 5.85007, -3.24122, 0, 0.202576, 3.24122, 0, -0.202576, -8.81272, 0, 10.4587, -0.468547, 0, 2.85805, 0.468547, 0, -2.85805, -3.58364, -0.000244141, 4.56199, -1.17756, 0, 3.41513, 1.17756, 0, -3.41513, -5.10296, -0.000259399, -3.5917, -2.78542, 0, -1.56996, 2.78542, 0, 1.56996, 3.2912, -0.000259399, -6.30449, -3.70976, 0, -1.39605, 3.70976, 0, 1.39605, 9.68509, -0.000259399, -0.0972629, 0, 0, 0, 0, 0, 0, 19.9658, -0.000259399, -1.11014 ),
-"tilts": PoolRealArray( 0, 0, 0, 0, 0, 0, 0, 0, 0 )
-}
-
-[node name="Railway" type="Spatial"]
-script = ExtResource( 1 )
-RailWidth = 0.08
-RailHeight = 0.12
-RailGauge = 1.0
-_railPaths = [ NodePath("L"), NodePath("R") ]
-_centreLine = NodePath("Centreline")
-
-[node name="Centreline" type="Path" parent="."]
-curve = SubResource( 1 )
-
-[node name="L" type="CSGPolygon" parent="."]
-polygon = PoolVector2Array( -0.58, 0, -0.58, 0.12, -0.42, 0.12, -0.42, 0 )
-mode = 2
-path_node = NodePath("../Centreline")
-path_interval_type = 0
-path_interval = 1.0
-path_simplify_angle = 0.0
-path_rotation = 2
-path_local = false
-path_continuous_u = true
-path_u_distance = 1.0
-path_joined = false
-
-[node name="R" type="CSGPolygon" parent="."]
-polygon = PoolVector2Array( 0.42, 0, 0.42, 0.12, 0.58, 0.12, 0.58, 0 )
-mode = 2
-path_node = NodePath("../Centreline")
-path_interval_type = 0
-path_interval = 1.0
-path_simplify_angle = 0.0
-path_rotation = 2
-path_local = false
-path_continuous_u = true
-path_u_distance = 1.0
-path_joined = false

scenes/trains/Train.tscn

@@ -1,10 +0,0 @@
-[gd_scene load_steps=3 format=2]
-
-[ext_resource path="res://scripts/trains/Train.cs" type="Script" id=1]
-[ext_resource path="res://scenes/trains/TrainCar.tscn" type="PackedScene" id=2]
-
-[node name="Train" type="Spatial"]
-script = ExtResource( 1 )
-_carPath = NodePath("Train Car")
-
-[node name="Train Car" parent="." instance=ExtResource( 2 )]

scenes/trains/TrainCar.tscn

@@ -1,22 +0,0 @@
-[gd_scene load_steps=3 format=2]
-
-[ext_resource path="res://scripts/trains/TrainCar.cs" type="Script" id=1]
-[ext_resource path="res://scenes/trains/Bogie.tscn" type="PackedScene" id=2]
-
-[node name="Train Car" type="Spatial"]
-script = ExtResource( 1 )
-Wheelbase = 5.0
-_boxNode = NodePath("CSGBox")
-_bogiePaths = [ NodePath("Bogie"), NodePath("Bogie2") ]
-
-[node name="CSGBox" type="CSGBox" parent="."]
-transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0 )
-width = 1.0
-height = 1.0
-depth = 8.0
-
-[node name="Bogie" parent="." instance=ExtResource( 2 )]
-transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, -2.5 )
-
-[node name="Bogie2" parent="." instance=ExtResource( 2 )]
-transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 2.5 )

scripts/OrbitCamera.cs

@@ -5,10 +5,9 @@ public class OrbitCamera : Spatial
 {
     [Export]
     private float _lookSensitivity = 200f;
+
     [Export]
     private float _zoomSensitivity = 10f;
-    [Export]
-    private Vector2 _fovRange = new Vector2(10, 60);
 
     [Export]
     private NodePath _cameraPath;
@@ -66,18 +65,9 @@ public class OrbitCamera : Spatial
         }
     }
 
-    private void Zoom(int dir)
+    private void Zoom(float amount)
     {
-        if (dir != 1 && dir != -1)
+        Camera.Fov += amount * _zoomSensitivity / Camera.Fov;
-            throw new ArgumentException();
-
-        var fov = Camera.Fov;
-        var zoom = _zoomSensitivity / Camera.Fov;
-
-        fov += (float)dir * zoom;
-        fov = Mathf.Clamp(fov, _fovRange.x, _fovRange.y);
-
-        Camera.Fov = fov;
     }
 
     private void HandleMouseMovement(InputEventMouseMotion mouseMotion)

scripts/Railway.cs

@@ -0,0 +1,53 @@
+using Godot;
+using System;
+
+[Tool]
+public class Railway : Path
+{
+    [Export]
+    private Color _color;
+    
+    [Export]
+    private float _gauge = 1f;
+    
+    private ImmediateGeometry _geo = null;
+    private Vector3[] _points = null;
+    
+    public void OnPathCurveChanged() 
+    {
+        Curve.Tessellate();
+        _points = Curve.GetBakedPoints();
+    }
+    
+    // Called when the node enters the scene tree for the first time.
+    public override void _Ready()
+    {
+        base._Ready();
+        
+        _geo = GetNode<ImmediateGeometry>("ImmediateGeometry");
+        
+        var m = new SpatialMaterial();
+        m.VertexColorUseAsAlbedo = true;
+        m.FlagsUnshaded = true;
+        _geo.MaterialOverride = m;
+
+        OnPathCurveChanged();
+    }
+
+    public override void _Process(float delta)
+    {
+        base._Process(delta);
+        
+        if (_geo == null) return;
+        if (_points == null || _points.Length == 0) return;
+        
+        _geo.Clear();
+        _geo.Begin(Mesh.PrimitiveType.LineStrip);
+        _geo.SetColor(new Color(1, 0, 0));
+        for(int i = 0; i < _points.Length; i++)
+        {
+            _geo.AddVertex(_points[i]);
+        }
+        _geo.End();
+    }
+}

scripts/Tracks.cs

@@ -0,0 +1,22 @@
+using Godot;
+using System;
+
+[Tool]
+public class Tracks : ImmediateGeometry
+{
+    private SpatialMaterial _m;
+
+    public override void _Ready()
+    {
+        // set up a material for imgui to use 
+        _m = new SpatialMaterial();
+        _m.VertexColorUseAsAlbedo = true;
+        _m.FlagsUnshaded = true;
+        this.MaterialOverride = _m;
+    }
+
+    public override void _Process(float delta)
+    {
+        GD.Print("hi!");
+    }
+}

scripts/Train.cs

@@ -0,0 +1,16 @@
+using Godot;
+using System;
+
+public class Train : Node
+{
+    // Called when the node enters the scene tree for the first time.
+    public override void _Ready()
+    {
+    }
+
+//  // Called every frame. 'delta' is the elapsed time since the previous frame.
+//  public override void _Process(float delta)
+//  {
+//      
+//  }
+}

scripts/trains/Railway.cs

@@ -1,119 +0,0 @@
-using Godot;
-using System;
-
-[Tool]
-public class Railway : Node
-{
-    [Export]
-    private NodePath[] _railPaths;
-
-
-    [Export]
-    private NodePath _centreLine;
-
-
-    private float _railWidth;
-    private float _railHeight;
-    private float _railGauge;
-
-    [Export]
-    private float RailWidth
-    {
-        get => _railWidth;
-        set
-        {
-            _railWidth = value;
-            if (Engine.EditorHint)
-            {
-                SetRailCrossSection();
-            }
-        }
-    }
-    [Export]
-    private float RailHeight
-    {
-        get => _railHeight;
-        set
-        {
-            _railHeight = value;
-            if (Engine.EditorHint)
-            {
-                SetRailCrossSection();
-            }
-        }
-    }
-
-    [Export]
-    private float RailGauge
-    {
-        get => _railGauge;
-        set
-        {
-            _railGauge = value;
-            if (Engine.EditorHint)
-            {
-                SetRailCrossSection();
-            }
-        }
-    }
-
-    private Path _path = null;
-    private Path Path
-    {
-        get
-        {
-            if (_path == null)
-            {
-                _path = GetNode<Path>(_centreLine);
-            }
-            return _path;
-        }
-    }
-
-    public Curve3D Curve => Path.Curve;
-
-    // the centre line should not have geometry directly associated with it.
-    // instead, two additional path/csgpolygon combinations should be managed
-    // in reference to the centre line for the left and right rails.
-
-    // Called when the node enters the scene tree for the first time.
-    public override void _Ready()
-    {
-
-    }
-
-    private void SetRailCrossSection()
-    {
-        // error checkin
-        if (_railPaths.Length != 2)
-            throw new Exception("need 2 rails");
-
-        // set rail geometry
-        for (int i = 0; i < 2; i++)
-        {
-            var rail = GetNode<CSGPolygon>(_railPaths[i]);
-
-            float w = RailWidth;
-            float h = RailHeight;
-            // horizontal offset of rail from centreline
-            float c = (-.5f + i) * RailGauge;
-
-            var polygon = new Vector2[4];
-            polygon[0] = new Vector2(c - w, 0);
-            polygon[1] = new Vector2(c - w, h);
-            polygon[2] = new Vector2(c + w, h);
-            polygon[3] = new Vector2(c + w, 0);
-            rail.Polygon = polygon;
-        }
-    }
-
-    public override void _Process(float delta)
-    {
-
-    }
-
-    public void AddPathFollower(PathFollow pathFollow)
-    {
-        Path.AddChild(pathFollow);
-    }
-}

scripts/trains/Train.cs

@@ -1,121 +0,0 @@
-using Godot;
-using System;
-using System.Collections.Generic;
-
-public class Train : Spatial
-{
-    [Export]
-    private float _speed = 1.0f;
-
-    [Export]
-    private NodePath _railwayPath;
-
-    private Railway _railway;
-    private float _distance = 0;
-
-    [Export]
-    private NodePath _carPath;
-    private TrainCar _car;
-
-    private Spatial[] _bogies;
-    private readonly Dictionary<Spatial, PathFollow> _bogiePathFollows = new Dictionary<Spatial, PathFollow>();
-
-    private ImmediateGeometry _imgui;
-
-    // Called when the node enters the scene tree for the first time.
-    public override void _Ready()
-    {
-        _imgui = new ImmediateGeometry();
-        var m = new SpatialMaterial();
-        m.VertexColorUseAsAlbedo = true;
-        m.FlagsUnshaded = true;
-        _imgui.MaterialOverride = m;
-        AddChild(_imgui);
-
-        _railway = GetNode<Railway>(_railwayPath);
-        _car = GetNode<TrainCar>(_carPath);
-
-        _bogies = new Spatial[_car.Bogies.Length];
-        for (int i = 0; i < _bogies.Length; i++)
-        {
-            var b = _car.Bogies[i];
-            _bogies[i] = b;
-            _bogiePathFollows[b] = new PathFollow
-            {
-                RotationMode = PathFollow.RotationModeEnum.Oriented
-            };
-            _railway.AddPathFollower(_bogiePathFollows[b]);
-
-            // detach the bogies from the car as we need to set the bogie
-            // positions in order to calculate the car position and it will
-            // get confusing if they're in a parent/child relationship,
-            // so make them all siblings
-            _car.RemoveChild(b);
-            this.AddChild(b);
-        }
-    }
-
-    // Called every frame. 'delta' is the elapsed time since the previous frame.
-    public override void _Process(float delta)
-    {
-        var length = _railway.Curve.GetBakedLength();
-
-        // first determine which is the front bogie. this is dependent
-        // on the direction of travel.
-        int travelDir = (int)(_distance / length) == 0 ? -1 : 1;
-
-        DrawTravelDirectionIndicator(travelDir);
-
-        // keep track of total distance
-        _distance += delta * _speed;
-        // wrap at 2x total distance
-        _distance %= length * 2;
-
-        var distance = PingPong(_distance, length);
-
-        // get the position of the first bogie on the track
-        var b = _bogies[0];
-        var pathFollow = _bogiePathFollows[b];
-
-        pathFollow.Offset = distance;
-        b.Translation = pathFollow.Translation;
-        b.Rotation = pathFollow.Rotation;
-
-        // now we want to position the car over the first bogie
-        GD.Print(_car.Wheelbase);
-        _car.Translation = b.Translation;
-        _car.Rotation = b.Rotation;
-
-        // TODO: this rotation quat needs to position the other 
-        // bogie over the curve
-        _car.Translation += _car.Transform.basis
-            .RotationQuat()
-            .Xform(Vector3.Back) * _car.Wheelbase * 0.5f;
-    }
-
-    private void DrawTravelDirectionIndicator(int travelDir)
-    {
-        _imgui.Clear();
-        _imgui.Begin(Mesh.PrimitiveType.LineStrip);
-        _imgui.SetColor(new Color(1, 0, 0));
-        var c = _car.Translation + Vector3.Up * 2;
-        _imgui.AddVertex(c);
-        var d = travelDir;
-        var l = 5;
-        var e = c + _car.Transform.basis
-            .RotationQuat()
-            .Xform(Vector3.Forward) * d * l;
-        _imgui.AddVertex(e);
-        _imgui.End();
-    }
-
-    // poor mans branching ping pong
-    private float PingPong(float t, float length)
-    {
-        var tml = t % length;
-
-        return t > length
-            ? length - tml
-            : tml;
-    }
-}

scripts/trains/TrainCar.cs

@@ -1,90 +0,0 @@
-using Godot;
-using System;
-
-[Tool]
-public class TrainCar : Spatial
-{
-    public float Length => Box.Depth;
-
-    [Export]
-    private NodePath _boxNode;
-
-    [Export]
-    private NodePath[] _bogiePaths;
-
-    [Export]
-    public float Wheelbase
-    {
-        get => _wheelbase;
-        set
-        {
-            _wheelbase = value;
-
-            // don't set the wheelbase except from the editor
-            if (!Engine.EditorHint) return;
-
-            SetBogeyPositions();
-        }
-    }
-    private float _wheelbase;
-
-    public Spatial[] Bogies
-    {
-        get
-        {
-            if (_bogies == null)
-            {
-                _bogies = new Spatial[2];
-                for (int i = 0; i < _bogiePaths.Length; i++)
-                {
-                    _bogies[i] = GetNode<Spatial>(_bogiePaths[i]);
-                }
-            }
-            return _bogies;
-        }
-    }
-    private Spatial[] _bogies = null;
-
-    private CSGBox _box;
-    private CSGBox Box
-    {
-        get
-        {
-            if (_box == null)
-            {
-                _box = GetNode<CSGBox>(_boxNode);
-            }
-            return _box;
-        }
-    }
-
-    public Railway Railway { get; set; }
-
-    public override void _Ready()
-    {
-
-    }
-
-    public override void _Process(float delta)
-    {
-    }
-
-    private void SetBogeyPositions()
-    {
-
-        if (Wheelbase > Length)
-            throw new Exception("wheelbase cannot be longer than car length");
-
-        if (_bogiePaths.Length != 2)
-            throw new Exception("_bogeyPaths should be of length 2");
-
-        for (int i = 0; i < 2; i++)
-        {
-            _bogies[i] = GetNode<Spatial>(_bogiePaths[i]);
-        }
-
-        var axis = Vector3.Forward * Wheelbase;
-        _bogies[0].Translation = axis * 0.5f;
-        _bogies[1].Translation = axis * -0.5f;
-    }
-}