void DrawLayerElement(Rect rect, int index, bool selected, bool focused)
{
rect.y = rect.y + kElementPadding;
var rectButton = new Rect((rect.x + kElementPadding), rect.y, kElementToggleWidth, kElementToggleWidth);
var rectImage = new Rect((rectButton.x + kElementToggleWidth), rect.y, kElementImageWidth, kElementImageHeight);
var rectObject = new Rect((rectImage.x + kElementImageWidth + 10), rect.y, kElementObjectFieldWidth, kElementObjectFieldHeight);
if (m_PaletteLayers.Count > 0 && m_PaletteLayers.ElementAtOrDefault(index) != null)
{
m_PaletteLayers[index].IsSelected = EditorGUI.Toggle(rectButton, m_PaletteLayers[index].IsSelected);
EditorGUILayout.BeginHorizontal();
List <TerrainLayer> existLayers = m_PaletteLayers.Select(l => l.AssignedLayer).ToList();
TerrainLayer oldLayer = m_PaletteLayers[index].AssignedLayer;
Texture2D icon = null;
if (m_PaletteLayers[index].AssignedLayer != null)
{
icon = AssetPreview.GetAssetPreview(m_PaletteLayers[index].AssignedLayer.diffuseTexture);
}
GUI.Box(rectImage, icon);
EditorGUI.BeginChangeCheck();
m_PaletteLayers[index].AssignedLayer = EditorGUI.ObjectField(rectObject, m_PaletteLayers[index].AssignedLayer, typeof(TerrainLayer), false) as TerrainLayer;
EditorGUILayout.EndHorizontal();
if (EditorGUI.EndChangeCheck())
{
if (m_PaletteLayers[index].AssignedLayer == null)
{
m_PaletteLayers.RemoveAt(index);
TerrainToolboxLayer.RemoveLayerFromTerrain(m_SelectedTerrain.terrainData, index);
m_SelectedTerrainLayer = null;
}
else if (existLayers.Contains(m_PaletteLayers[index].AssignedLayer) && m_PaletteLayers[index].AssignedLayer != oldLayer)
{
EditorUtility.DisplayDialog("Error", "Layer exists. Please select a different layer.", "OK");
m_PaletteLayers[index].AssignedLayer = oldLayer;
}
else
{
if (m_SelectedTerrain.terrainData.terrainLayers.Length < m_PaletteLayers.Count)
{
TerrainToolboxLayer.AddLayerToTerrain(m_SelectedTerrain.terrainData, m_PaletteLayers[index].AssignedLayer);
}
else
{
int layersLength = m_SelectedTerrain.terrainData.terrainLayers.Length;
TerrainLayer[] layers = m_SelectedTerrain.terrainData.terrainLayers;
layers[index] = m_PaletteLayers[index].AssignedLayer;
m_SelectedTerrainLayer = m_PaletteLayers[index].AssignedLayer;
m_SelectedTerrain.terrainData.terrainLayers = layers;
}
}
}
}
}
void RemoveSelectedLayerElements()
{
for (int i = m_PaletteLayers.Count - 1; i >= 0; i--)
{
if (m_PaletteLayers[i].IsSelected)
{
if (m_PaletteLayers[i].AssignedLayer != null)
{
TerrainToolboxLayer.RemoveLayerFromTerrain(m_SelectedTerrain.terrainData, i);
}
m_PaletteLayers.RemoveAt(i);
}
}
m_SelectedTerrainLayer = null;
AssetDatabase.Refresh();
}
public void RemoveTerrainLayer_UndoShouldCorrectSplatTextures()
{
var terrainData = new TerrainData();
terrainData.alphamapResolution = 16;
terrainData.terrainLayers = new[]
{
new UnityEngine.TerrainLayer(), new UnityEngine.TerrainLayer(), new UnityEngine.TerrainLayer()
};
int layerCount = 3;
float[,,] map = new float[terrainData.alphamapWidth, terrainData.alphamapHeight, layerCount];
for (int i = 0; i < layerCount; i++)
{
for (int y = 0; y < terrainData.alphamapHeight; y++)
{
for (int x = 0; x < terrainData.alphamapWidth; x++)
{
map[x, y, 0] = 0;
}
}
}
// set magic pixels on all the layers so we can track what should be restored
map[0, 0, 0] = 1.0f;
map[0, 1, 1] = 1.0f;
map[0, 2, 2] = 1.0f;
terrainData.SetAlphamaps(0, 0, map);
var terrain = Terrain.CreateTerrainGameObject(terrainData).GetComponent <Terrain>();
// the package uses this function because it performs some prepass prior to deletion
TerrainToolboxLayer.RemoveLayerFromTerrain(terrainData, 1);
Undo.PerformUndo();
terrainData.SyncTexture(TerrainData.AlphamapTextureName);
var newMap = terrainData.GetAlphamaps(0, 0, terrainData.alphamapResolution, terrainData.alphamapResolution);
for (int i = 0; i < layerCount; i++)
{
Assert.That(newMap[0, i, i], Is.EqualTo(1.0f));
}
GameObject.DestroyImmediate(terrain.gameObject);
}
void RemoveLayerElement()
{
if (m_PaletteLayers.ElementAtOrDefault(m_LayerList.index) == null)
{
return;
}
m_PaletteLayers.RemoveAt(m_LayerList.index);
if (m_SelectedTerrain.terrainData.terrainLayers.Length > m_LayerList.index)
{
TerrainToolboxLayer.RemoveLayerFromTerrain(m_SelectedTerrain.terrainData, m_LayerList.index);
}
m_LayerList.index = m_PaletteLayers.Count - 1;
if (m_LayerList.index >= 0 && m_LayerList.index < m_PaletteLayers.Count)
{
m_SelectedTerrainLayer = m_PaletteLayers[m_LayerList.index].AssignedLayer;
}
else
{
m_SelectedTerrainLayer = null;
}
}