Initial, scripts

scripts/LineDrawer3D.cs

@@ -0,0 +1,45 @@
+using Godot;
+using System.Collections.Generic;
+
+namespace Utility
+{
+    class LineDrawer3D : ImmediateGeometry
+    {
+        struct Line
+        {
+            public Vector3 p1;
+            public Vector3 p2;
+            public Color color;
+        }
+
+        List<Line> lines = new List<Line>();
+
+        public void AddLine(Vector3 p1, Vector3 p2, Color color)
+        {
+            lines.Add(new Line() { p1 = p1, p2 = p2, color = color });
+        }
+
+        public void ClearLines()
+        {
+            lines.Clear();
+        }
+
+        public override void _Process(float delta)
+        {
+            base._Process(delta);
+
+            Clear();
+
+            Begin(Mesh.PrimitiveType.Lines);
+
+            for (int i = 0; i < lines.Count; ++i)
+            {
+                SetColor(lines[i].color);
+                AddVertex(ToLocal(lines[i].p1));
+                AddVertex(ToLocal(lines[i].p2));
+            }
+
+            End();
+        }
+    }
+}