//ref: http://answers.unity3d.com/questions/1193700/what-is-the-proper-way-to-draw-previews-for-custom.html
/// <summary>
/// Creates a Texture2D with a preview of a tilemap or tilemapGroup. In case you use a tilemapGroup, the tilemap will be used as reference for the PixelsPerUnits.
/// </summary>
/// <param name="tilemap"></param>
/// <param name="tilemapGroup"></param>
/// <returns></returns>
public static Texture2D CreateTilemapGroupPreviewTexture(STETilemap tilemap, TilemapGroup tilemapGroup = null)
{
float pixelToUnits = tilemap.Tileset.TilePxSize.x / tilemap.CellSize.x;
Bounds tilemapGroupBounds = tilemap.MapBounds;
if (tilemapGroup)
{
tilemapGroup.IterateTilemapWithAction((STETilemap tmap) => tilemapGroupBounds.Encapsulate(tmap.MapBounds));
}
Vector2 size = tilemapGroupBounds.size * pixelToUnits;
Camera previewCamera = Camera.main ? Camera.main : Object.FindObjectOfType <Camera>();
previewCamera = GameObject.Instantiate(previewCamera);
s_previewCamera = previewCamera;
RenderTexture rendTextr = new RenderTexture((int)size.x, (int)size.y, 32, RenderTextureFormat.ARGB32);
rendTextr.Create();
previewCamera.transform.position = tilemap.transform.TransformPoint(new Vector3(tilemapGroupBounds.center.x, tilemapGroupBounds.center.y, -10));
RenderTexture savedActiveRT = RenderTexture.active;
RenderTexture savedCamTargetTexture = previewCamera.targetTexture;
RenderTexture.active = rendTextr;
previewCamera.targetTexture = rendTextr;
previewCamera.orthographicSize = (previewCamera.pixelRect.height) / (2f * pixelToUnits);
previewCamera.Render();
Texture2D outputTexture = new Texture2D((int)size.x, (int)size.y, TextureFormat.ARGB32, false);
outputTexture.ReadPixels(new Rect(0, 0, (int)size.x, (int)size.y), 0, 0);
outputTexture.Apply();
previewCamera.targetTexture = savedCamTargetTexture;
RenderTexture.active = savedActiveRT;
Object.DestroyImmediate(rendTextr);
Object.DestroyImmediate(previewCamera.gameObject);
s_previewCamera = null;
return(outputTexture);
}
private void DoWindow(int id)
{
Event e = Event.current;
STETilemap defaultTilemap = m_target.GetDefaultTilemapForCurrentTileSelection();
GUILayout.BeginArea(new Rect(0f, EditorGUIUtility.singleLineHeight, m_defaultTilemapsWindowRect.width, m_defaultTilemapsWindowRect.height));
GUILayout.Label("Default Tilemap: " + (defaultTilemap? "<b>" + defaultTilemap.name + "</b>" : "<none>"), STEditorStyles.Instance.richLabel);
if (GUILayout.Button("Set Default Tilemap <b>(For the Palette Selection)</b>", STEditorStyles.Instance.richButton))
{
if (m_target.SelectedTilemap && m_target.SelectedTilemap.Tileset && m_target.SelectedTilemap.Tileset.TileSelection != null)
{
foreach (uint tileData in m_target.SelectedTilemap.Tileset.TileSelection.selectionData)
{
SetDefaultTilemapFromTileData(m_target.SelectedTilemap, 0, 0, tileData);
}
}
else
{
m_target.SetDefaultTilemapForCurrentSelectedTileOrBrush();
}
}
if (GUILayout.Button("Remove Default Tilemap <b>(For the Palette Selection)</b>", STEditorStyles.Instance.richButton))
{
m_target.ClearDefaultTilemapForCurrentSelectedTileOrBrush();
}
EditorGUILayout.Space();
if (GUILayout.Button("Set Default Tilemap <b>(For the Tiles in the Tilemap)</b>", STEditorStyles.Instance.richButton))
{
TilemapUtils.IterateTilemapWithAction(m_target.SelectedTilemap, SetDefaultTilemapFromTileData);
}
if (GUILayout.Button("Set Default Tilemap <b>(For all Tilemaps)</b>", STEditorStyles.Instance.richButton))
{
m_target.IterateTilemapWithAction((STETilemap tilemap) => {
TilemapUtils.IterateTilemapWithAction(tilemap, SetDefaultTilemapFromTileData);
});
}
EditorGUILayout.Space();
/*
* if (GUILayout.Button("Clear Default Tilemap <b>(All Tiles in the Tilemap)</b>", STEditorStyles.Instance.richButton))
* TilemapUtils.IterateTilemapWithAction(m_target.SelectedTilemap, (STETilemap tilemap, int gx, int gy, uint tileData) =>
* {
* int brushId = Tileset.GetBrushIdFromTileData(tileData);
* if (brushId != Tileset.k_BrushId_Default)
* m_target.ClearBrushDefaultTilemap(brushId);
* else
* {
* int tileId = Tileset.GetTileIdFromTileData(tileData);
* if (tileId != Tileset.k_TileId_Empty)
* m_target.ClearTileDefaultTilemap(tileId);
* }
* });
*/
if (GUILayout.Button("Clear Default Tilemap Data <b>(For all Tiles)</b>", STEditorStyles.Instance.richButton))
{
m_target.ClearAllDefaultTilemapData();
}
GUILayout.EndArea();
if (e.isMouse && m_defaultTilemapsWindowRect.Contains(e.mousePosition))
{
if (e.type == EventType.MouseDown && e.mousePosition.y <= EditorGUIUtility.singleLineHeight)
{
m_defaultTilemapWindowMinimized = !m_defaultTilemapWindowMinimized;
}
e.Use();
}
}
