public override void OnInspectorGUI()
{
serializedObject.Update();
// Add vertex hint
EditorGUILayout.HelpBox("Hold Alt and drag a vertex to create a new one.", MessageType.Info);
// Delete vertex button
if (selection == null || se.ShapeVertices.Count <= 3)
{
GUI.enabled = false;
}
if (GUILayout.Button("Delete selected vertex"))
{
Undo.RegisterCompleteObjectUndo(se, "delete vertex");
se.ShapeVertices.Remove(selection);
selection = null;
se.GenerateMesh();
}
GUI.enabled = true;
// Properties
EditorGUILayout.PropertyField(textureScale, true);
EditorGUILayout.PropertyField(vertices);
EditorGUI.indentLevel += 1;
if (vertices.isExpanded)
{
for (int i = 0; i < vertices.arraySize; i++)
{
EditorGUILayout.PropertyField(vertices.GetArrayElementAtIndex(i), new GUIContent("Vertex " + i), true);
}
}
EditorGUI.indentLevel -= 1;
serializedObject.ApplyModifiedProperties();
}
void OnSceneGUI()
{
Event e = Event.current;
if (e.type == EventType.MouseDown)
{
Undo.RegisterCompleteObjectUndo(se, "change extruded shape");
// if control key pressed, we will have to create a new vertex if position is changed
if (e.alt)
{
mustCreateNewNode = true;
}
}
if (e.type == EventType.MouseUp)
{
mustCreateNewNode = false;
}
Vector3 splineStartTangent = se.spline.GetTangentAlongSpline(0);
Vector3 splineStart = se.spline.GetLocationAlongSpline(0);
Quaternion q = CubicBezierCurve.GetRotationFromTangent(splineStartTangent);
foreach (SplineExtrusion.Vertex v in se.ShapeVertices)
{
// we create point and normal relative to the spline start where the shape is drawn
Vector3 point = se.transform.TransformPoint(q * v.point + splineStart);
Vector3 normal = se.transform.TransformPoint(q * (v.point + v.normal) + splineStart);
if (v == selection)
{
// draw the handles for selected vertex position and normal
float size = HandleUtility.GetHandleSize(point) * 0.3f;
float snap = 0.1f;
// create a handle for the vertex position
Vector3 movedPoint = Handles.Slider2D(0, point, splineStartTangent, Vector3.right, Vector3.up, size, Handles.CircleHandleCap, new Vector2(snap, snap));
if (movedPoint != point)
{
// position has been moved
Vector2 newVertexPoint = Quaternion.Inverse(q) * (se.transform.InverseTransformPoint(movedPoint) - splineStart);
if (mustCreateNewNode)
{
// We must create a new node
mustCreateNewNode = false;
SplineExtrusion.Vertex newVertex = new SplineExtrusion.Vertex(newVertexPoint, v.normal, v.uCoord);
int i = se.ShapeVertices.IndexOf(v);
if (i == se.ShapeVertices.Count - 1)
{
se.ShapeVertices.Add(newVertex);
}
else
{
se.ShapeVertices.Insert(i + 1, newVertex);
}
selection = newVertex;
}
else
{
v.point = newVertexPoint;
// normal must be updated if point has been moved
normal = se.transform.TransformPoint(q * (v.point + v.normal) + splineStart);
}
se.GenerateMesh();
}
else
{
// vertex position handle hasn't been moved
// create a handle for normal
Vector3 movedNormal = Handles.Slider2D(normal, splineStartTangent, Vector3.right, Vector3.up, size, Handles.CircleHandleCap, snap);
if (movedNormal != normal)
{
// normal has been moved
v.normal = (Vector2)(Quaternion.Inverse(q) * (se.transform.InverseTransformPoint(movedNormal) - splineStart)) - v.point;
se.GenerateMesh();
}
}
Handles.BeginGUI();
DrawQuad(HandleUtility.WorldToGUIPoint(point), CURVE_COLOR);
DrawQuad(HandleUtility.WorldToGUIPoint(normal), Color.red);
Handles.EndGUI();
}
else
{
// we draw a button to allow selection of the vertex
Handles.BeginGUI();
Vector2 p = HandleUtility.WorldToGUIPoint(point);
if (GUI.Button(new Rect(p - new Vector2(QUAD_SIZE / 2, QUAD_SIZE / 2), new Vector2(QUAD_SIZE, QUAD_SIZE)), GUIContent.none))
{
selection = v;
}
Handles.EndGUI();
}
// draw an arrow from the vertex location to the normal
Handles.color = Color.red;
Handles.DrawLine(point, normal);
// draw a line between that vertex and the next one
int index = se.ShapeVertices.IndexOf(v);
int nextIndex = index == se.ShapeVertices.Count - 1 ? 0 : index + 1;
SplineExtrusion.Vertex next = se.ShapeVertices[nextIndex];
Handles.color = CURVE_COLOR;
Vector3 vAtSplineEnd = se.transform.TransformPoint(q * next.point + splineStart);
Handles.DrawLine(point, vAtSplineEnd);
}
}