/// <summary>
/// Handle the operation event in the scene view
/// </summary>
/// <param name="painter">The painter for spawning the object</param>
/// <param name="position">
/// The position for spawning the object. Should be the value got from the
/// <c>GetPossiblePosition</c>
/// </param>
private static void HandleEvent(LevelPainter painter, Vector3 position)
{
var spawnConfig = painter.spawnConfig;
var matrix = Matrix4x4.TRS(
position, Quaternion.Euler(0, spawnConfig.yRotation, 0),
Vector3.Scale(spawnConfig.globalScale, spawnConfig.unitScaleSize));
// Make a 3D button following the cursor
// If it's clicked, spawn a object at the specified position
using (new Handles.DrawingScope(
SettingsManager.GetDisplaySettings().positionPreviewColor, matrix)) {
if (Handles.Button(
Vector3.zero, Quaternion.identity, 1, -1, Handles.CubeHandleCap))
{
painter.SpawnGameObject(position);
}
}
// Drawing the object looking direction
var size = HandleUtility.GetHandleSize(position) / 1.5f;
using (new Handles.DrawingScope(
SettingsManager.GetDisplaySettings().directionColor)) {
Handles.ArrowHandleCap(
0, position, Quaternion.Euler(0, spawnConfig.yRotation, 0),
size, EventType.Repaint);
}
}
/// <summary>
/// Calculate the possible position for spawning object by snapping it
/// according to the painter setting
/// </summary>
/// <param name="painter">The painter used for calculating the position</param>
/// <param name="mouseScreenPos">The position of the mouse in screen space</param>
/// <returns>The result position</returns>
private static Vector3 GetPossiblePosition(
LevelPainter painter, Vector3 mouseScreenPos)
{
var operatingPlane = new Plane(
Vector3.up, new Vector3(0, painter.spawnConfig.yPosition, 0));
var ray = Camera.current.ScreenPointToRay(mouseScreenPos);
operatingPlane.Raycast(ray, out var enterValue);
return(LevelPainter.SnapPosition(ray.GetPoint(enterValue)));
}
private void OnEnable()
{
_painter = FindObjectOfType <LevelPainter>();
if (_painter == null)
{
CreateInactivateUI();
}
else
{
_palette = PaletteData.GetData();
CreateUI();
SceneView.duringSceneGui += OnSceneGUI;
}
}
/// <summary>
/// Handle the event in the scene for the level painter
/// </summary>
public static void HandleSceneEvent(LevelPainter painter)
{
var mouseScreenPos =
HandleUtility.GUIPointToScreenPixelCoordinate(
Event.current.mousePosition);
// If the mouse is not in the scene view, not to draw the position preview.
if (!Camera.current.pixelRect.Contains(mouseScreenPos))
{
return;
}
var targetPosition = GetPossiblePosition(painter, mouseScreenPos);
HandleEvent(painter, targetPosition);
DrawPositionPreview(targetPosition);
}
