/// <summary>
/// Handles the control logic for adding a point. This will draw a red line from the mouse position to the closest point along the
/// curve
/// </summary>
/// <param name="spline">spline to handle control point logic for</param>
protected void PointSelection(ISpline2DEditor spline)
{
float2 mouse = EditorInputAbstractions.MousePos2D();
int splineIndex;
float2 createPoint = ClosestPointSelection(mouse, spline, out splineIndex);
if (splineIndex != m_editNewPointIndex)
{
m_editNewPointIndex = splineIndex;
Repaint(); // force refresh inspector
}
Handles.color = Color.red;
Handles.DrawLine(
new Vector3(createPoint.x, createPoint.y, 0f),
new Vector3(mouse.x, mouse.y, 0f));
if (EditorInputAbstractions.LeftClick() && spline is Object objSpline)
{
Undo.RecordObject(objSpline, "Insert Spline Point");
EditorUtility.SetDirty(objSpline);
float3 origin = m_sourceTrans.position;
spline.InsertControlPoint(m_editNewPointIndex, mouse - origin.xy);
SceneView.RepaintAll();
}
}
public void UpdateControlPoint(ISpline2D spline, int index, float3 newPoint, SplinePoint pointType)
{
ISpline2DEditor spline2D = spline as ISpline2DEditor;
Assert.NotNull(spline2D);
spline2D.UpdateControlPointLocal(index, newPoint.xy, pointType);
}
public float3 GetControlPoint(ISpline2D spline, int index, SplinePoint pointType)
{
ISpline2DEditor spline2D = spline as ISpline2DEditor;
Assert.NotNull(spline2D);
return(new float3(spline2D.GetControlPoint2DLocal(index), 0f));
}
public void InsertControlPointWorldSpace(ISpline2D spline, int index, float3 point)
{
ISpline2DEditor spline2D = spline as ISpline2DEditor;
Assert.NotNull(spline2D);
spline2D.InsertControlPoint(index, point.xy);
}
/// <summary>
/// Find the closest point to the spline
/// </summary>
/// <param name="mouse">mouse position</param>
/// <param name="spline">spline to check</param>
/// <param name="index">spline index of the closest point</param>
/// <returns>closest point on the spline to the mouse</returns>
protected override float2 ClosestPointSelection(float2 mouse, ISpline2DEditor spline, out int index)
{
Assert.AreSame(pointSpline, spline, "Somehow the spline changed from the start point and the point sample point");
float2 closest = base.ClosestPointSelection(mouse, spline, out index);
index = pointSpline.Looped ? (index + 1) % spline.ControlPointCount : index;
return(closest);
}
/// <summary>
/// Find the closest point to the spline
/// </summary>
/// <param name="mouse">mouse position</param>
/// <param name="spline">spline to check</param>
/// <param name="index">spline index of the closest point</param>
/// <returns>closest point on the spline to the mouse</returns>
protected override float2 ClosestPointSelection(float2 mouse, ISpline2DEditor spline, out int index)
{
index = 0;
if (spline.ControlPointCount == 1)
{
return(spline.GetControlPoint2DLocal(0));
}
else if (spline.ControlPointCount == 0)
{
return(mouse);
}
float2 bestPoint = float2.zero;
float bestDistance = float.MaxValue;
for (int i = 1; i < spline.SegmentPointCount; i++)
{
for (int s = 0; s <= 64; s++)
{
float progress = s / 64f;
float2 p = spline.Get2DPointWorld(progress, i - 1);
float dist = math.distance(mouse, p);
if (bestDistance > dist)
{
bestPoint = p;
bestDistance = dist;
if (progress > 0.5)
{
index = (i + 1) % spline.ControlPointCount;
}
else
{
index = i;
}
}
}
}
if (!(spline is ILoopingSpline) || !((ILoopingSpline)spline).Looped)
{
if (math.distance(bestPoint, spline.GetControlPoint2DWorld(0)) <= 0.00001f)
{
index = 0;
}
else if (math.distance(bestPoint, spline.GetControlPoint2DWorld(spline.ControlPointCount - 1)) <= 0.00001f)
{
index = spline.ControlPointCount - 1;
}
}
return(bestPoint);
}
private void MoveWithTransform(ISpline2DEditor spline)
{
if (m_editMoveWithTrans)
{
return;
}
Vector3 currentPosition = m_sourceTrans.position;
if (currentPosition != m_lastTransPosition)
{
Vector3 delta = m_lastTransPosition - currentPosition;
m_lastTransPosition = currentPosition;
// move all the points by delta amount
spline.MoveControlPoints(new float2(delta.x, delta.y));
}
}
/// <summary>
/// Renders a blue dot at each control point of the spline
/// </summary>
/// <param name="spline">spline to render control points for</param>
protected void RenderControlPoints(ISpline2DEditor spline)
{
for (int i = 0; i < spline.ControlPointCount; i++)
{
bool selected = m_editControlPoint == i;
Handles.color = selected ? Color.blue : new Color(0f, 1f, 1f, 0.73f);
float2 point = spline.GetControlPoint2DWorld(i);
float3 editorPosition = new float3(point, 0f);
// draw handles
if (selected)
{
// main point
EditorGUI.BeginChangeCheck();
Vector3 pos = Handles.DoPositionHandle(editorPosition, Quaternion.identity);
if (EditorGUI.EndChangeCheck() && spline is Object objSpline)
{
Undo.RecordObject(objSpline, "Move Point");
EditorUtility.SetDirty(objSpline);
float3 origin = ((MonoBehaviour)spline).transform.position;
float2 newPoint = new float2(pos.x, pos.y) - origin.xy;
spline.UpdateControlPointLocal(i, newPoint, SplinePoint.Point);
SceneView.RepaintAll();
}
}
else
{
float size = HandleUtility.GetHandleSize(editorPosition) / 12f;
if (Handles.Button(editorPosition, Quaternion.identity, size, size, Handles.DotHandleCap))
{
m_editControlPoint = i;
Repaint();
}
}
}
}
/// <summary>
/// Shared Inspector logic
/// </summary>
/// <param name="spline">spline to show inspector for</param>
protected void OnInspectorGUI(ISpline2DEditor spline)
{
if (GUILayout.Button("Edit Points"))
{
m_editing = !m_editing;
m_editControlPoint = null;
m_editNewPointIndex = -1;
m_lastTransPosition = m_sourceTrans?.position ?? Vector3.zero;
SceneView.RepaintAll();
}
if (!m_editing)
{
GUILayout.Space(5);
EditorGUILayout.HelpBox(
$"Points: {spline.ControlPointCount}\n" +
$"Length: {spline.Length():N3}", MessageType.None);
if (spline is ILoopingSpline loop)
{
EditorGUI.BeginChangeCheck();
loop.Looped = EditorGUILayout.Toggle("Loop", loop.Looped);
if (EditorGUI.EndChangeCheck())
{
SceneView.RepaintAll();
}
}
if (spline is IArkableSpline arked)
{
EditorGUI.BeginChangeCheck();
arked.ArkParameterization = EditorGUILayout.Toggle("Ark Parametrization", arked.ArkParameterization);
if (EditorGUI.EndChangeCheck() && spline is Object objSpline)
{
EditorUtility.SetDirty(objSpline);
}
if (arked.ArkParameterization)
{
EditorGUI.BeginChangeCheck();
arked.ArkLength = EditorGUILayout.FloatField("Ark Length", arked.ArkLength);
if (EditorGUI.EndChangeCheck() && spline is Object objSpline2)
{
EditorUtility.SetDirty(objSpline2);
}
}
}
GUILayout.Space(5);
// Draw spline points - Draw a point every set interval to illustrate where bezier points will be
EditorGUI.BeginChangeCheck();
m_debugPointQty = (int)EditorGUILayout.Slider("Draw points", m_debugPointQty, 0, 200);
if (EditorGUI.EndChangeCheck())
{
SceneView.RepaintAll();
}
}
else
{
if (m_sourceTrans != null)
{
bool value = EditorGUILayout.Toggle("Move Points with Transform", m_editMoveWithTrans);
if (value != m_editMoveWithTrans)
{
m_editMoveWithTrans = value;
m_lastTransPosition = m_sourceTrans.position;
}
MoveWithTransform(spline);
}
if (m_editNewPointIndex >= 0)
{
EditorGUILayout.LabelField($"New At Index: {m_editNewPointIndex}");
}
if (m_editControlPoint == null)
{
EditorGUILayout.HelpBox($"No Control Point Selected!", MessageType.None);
}
else
{
m_editNewPointIndex = -1;
EditorGUILayout.LabelField($"Control Point: {m_editControlPoint}");
// show the current control point location
EditorGUI.BeginChangeCheck();
float2 currentPoint = spline.GetControlPoint2DLocal(m_editControlPoint.Value);
currentPoint = EditorGUILayout.Vector2Field("Point", currentPoint);
if (EditorGUI.EndChangeCheck())
{
spline.UpdateControlPointLocal(m_editControlPoint.Value, currentPoint, SplinePoint.Point);
SceneView.RepaintAll();
}
SplineEditMode existingValue = spline.GetEditMode(m_editControlPoint.Value);
SplineEditMode editMode = (SplineEditMode)EditorGUILayout.EnumPopup("Edit Mode", existingValue);
if (editMode != existingValue && spline is Object objSpline)
{
Undo.RecordObject(objSpline, $"Change EditMode of Point {m_editControlPoint}");
EditorUtility.SetDirty(objSpline);
spline.ChangeEditMode(m_editControlPoint.Value, editMode);
SceneView.RepaintAll();
}
GUILayout.Space(10);
if (GUILayout.Button("Remove Point") ||
Event.current.isKey && Event.current.type == EventType.KeyDown &&
Event.current.keyCode == KeyCode.Delete)
{
spline.RemoveControlPoint(m_editControlPoint.Value);
m_editControlPoint = null;
SceneView.RepaintAll();
if (Event.current.keyCode == KeyCode.Delete)
{
// Sadly this doesn't actually work :( dammit Unity
GUIUtility.hotControl = 0;
Event.current.Use();
}
}
}
}
}
