Initial commit

Runtime/SplineImporter.cs

@@ -0,0 +1,190 @@
+#if UNITY_EDITOR
+
+using System;
+using UnityEditor;
+using UnityEngine;
+using UnityEngine.Splines;
+using static SplineImporter;
+using static SplineData;
+using System.IO;
+using System.Text;
+using Unity.Mathematics;
+using System.Collections.Generic;
+
+[CustomEditor(typeof(SplineImporter))]
+public class SplineImporterEditor : Editor
+{
+    public override void OnInspectorGUI()
+    {
+        DrawDefaultInspector();
+
+        if (GUILayout.Button("Import Spline"))
+        {
+            SplineImporter splineImporter = target as SplineImporter;
+
+            splineImporter.name = splineImporter.splineData.name;
+
+            SplineData splineData = JsonUtility.FromJson<SplineData>(splineImporter.splineData.text);
+
+            SplineContainer splineContainer = splineImporter.GetComponent<SplineContainer>();
+
+            foreach (UnityEngine.Splines.Spline thisSpline in splineContainer.Splines)
+                splineContainer.RemoveSpline(thisSpline);
+
+            foreach (SplineData.Spline thisDataSpline in splineData.splines)
+            {
+                UnityEngine.Splines.Spline thisSpline = splineContainer.AddSpline();
+
+                thisSpline.Closed = thisDataSpline.closed;
+
+                foreach (ControlPoint thisControlPoint in thisDataSpline.controlPoints)
+                {
+                    Vector3 position = PositionToVector(thisControlPoint.position);
+
+                    Vector3 handleL = PositionToVector(thisControlPoint.handleL);
+
+                    Vector3 handleR = PositionToVector(thisControlPoint.handleR);
+
+                    Quaternion rotation = Quaternion.LookRotation(handleR - position, Vector3.up) * Quaternion.AngleAxis(-thisControlPoint.tilt, Vector3.forward);
+
+                    float3x3 rotationMatrix = new float3x3(rotation);
+
+                    thisSpline.Add(new()
+                    {
+                        Position = position * splineImporter.scale,
+                        Rotation = rotation,
+                        TangentIn = ((Vector3)math.mul(handleL - position, rotationMatrix)) * splineImporter.scale,
+                        TangentOut = ((Vector3)math.mul(handleR - position, rotationMatrix)) * splineImporter.scale
+                    },
+                    TangentMode.Broken);
+                }
+            }
+        }
+
+        if (GUILayout.Button("Export Spline"))
+        {
+            SplineImporter splineImporter = target as SplineImporter;
+
+            if (!splineImporter.splineData)
+            {
+                string path = "Assets" + EditorUtility.SaveFilePanel("Save .JSON", "", "New Spline.json", "json").Substring(Application.dataPath.Length);
+
+                if (path.Length > 0)
+                {
+                    File.WriteAllBytes(path, Encoding.ASCII.GetBytes(""));
+
+                    AssetDatabase.Refresh();
+
+                    TextAsset textAsset = AssetDatabase.LoadAssetAtPath(path, typeof(TextAsset)) as TextAsset;
+
+                    splineImporter.splineData = textAsset;
+                }
+                else return;
+            }
+
+            SplineContainer splineContainer = splineImporter.GetComponent<SplineContainer>();
+
+            SplineData splineData = new();
+
+            splineData.splines = new SplineData.Spline[splineContainer.Splines.Count];
+
+            List<SplineData.Spline> dataSplines = new();
+
+            foreach (UnityEngine.Splines.Spline thisSpline in splineContainer.Splines)
+            {
+                List<ControlPoint> controlPoints = new();
+
+                foreach (BezierKnot thisBezierKnot in thisSpline.Knots)
+                {
+                    Position position = VectorToPosition(thisBezierKnot.Position);
+
+                    float3x3 rotationMatrix = new float3x3(Quaternion.Inverse(thisBezierKnot.Rotation));
+
+                    Position handleL = VectorToPosition(math.mul(thisBezierKnot.TangentIn, rotationMatrix) + thisBezierKnot.Position);
+
+                    Position handleR = VectorToPosition(math.mul(thisBezierKnot.TangentOut, rotationMatrix) + thisBezierKnot.Position);
+
+                    controlPoints.Add(new()
+                    {
+                        position = position,
+                        handleL = handleL,
+                        handleR = handleR
+                    });
+                }
+
+                dataSplines.Add(new()
+                {
+                    controlPoints = controlPoints.ToArray(),
+                    closed = thisSpline.Closed
+                });
+            }
+
+            splineData.splines = dataSplines.ToArray();
+
+            File.WriteAllText(AssetDatabase.GetAssetPath(splineImporter.splineData), JsonUtility.ToJson(splineData, true));
+
+            AssetDatabase.Refresh();
+        }
+    }
+}
+
+[RequireComponent(typeof(SplineContainer))]
+public class SplineImporter : MonoBehaviour
+{
+    public TextAsset splineData;
+
+    public float scale = 1;
+
+    public static Vector3 PositionToVector(Position position)
+    {
+        return new(position.x, position.z, position.y);
+    }
+
+    public static Position VectorToPosition(Vector3 vector)
+    {
+        return new()
+        {
+            x = vector.x,
+            y = vector.z,
+            z = vector.y
+        };
+    }
+}
+
+[Serializable]
+public class SplineData
+{
+    [Serializable]
+    public struct Position
+    {
+        public float x;
+
+        public float y;
+
+        public float z;
+    }
+
+    [Serializable]
+    public struct ControlPoint
+    {
+        public Position position;
+
+        public Position handleL;
+
+        public Position handleR;
+
+        public float tilt;
+    }
+
+    [Serializable]
+    public struct Spline
+    {
+        public ControlPoint[] controlPoints;
+
+        public bool closed;
+    }
+
+    public Spline[] splines = new Spline[0];
+}
+
+#endif