added support for looping background

Cammin · Oct 17, 2023 · 70124a3 · 70124a3
1 parent 4760ea8
commit 70124a3
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Showing 4 changed files with 22 additions and 14 deletions.
diff --git a/Assets/LDtkUnity/CHANGELOG.md b/Assets/LDtkUnity/CHANGELOG.md
@@ -9,6 +9,8 @@
 - Fixed a bug where reordering IntGrid value definitions would use the wrong tile references, and in some cases, cause an exception
 - Changed the icons for the imported Project/Level/Tileset to match with the icons from LDtk 1.5
 
+- Added support for looping level backgrounds
+  - Make the level's looping background pivot to the bottom left for perfect accuracy 
 - Added a LDtkIid for the LDtkJson root object from LDtk [1.2.0](https://ldtk.io/json/#changes;1.2.0)
 - Added support for individual tile alpha from LDtk [1.3.1](https://ldtk.io/json/#changes;1.3.1)
 - Added safety-check if a tileset definition's `relPath` was null or empty

diff --git a/Assets/LDtkUnity/Editor/Builders/LDtkBuilderLevelBackground.cs b/Assets/LDtkUnity/Editor/Builders/LDtkBuilderLevelBackground.cs
@@ -70,16 +70,21 @@ private void BuildBackgroundTexture()
             {
                 return;
             }
-
+
+            _layerSortingOrder.Next();
+
             SpriteRenderer renderer = CreateGameObject("_BgImage");
             renderer.sprite = sprite;
-
-            _layerSortingOrder.Next();
             renderer.sortingOrder = _layerSortingOrder.SortingOrderValue;
+            if (_level.LevelBgPos is BgPos.Repeat)
+            {
+                renderer.drawMode = SpriteDrawMode.Tiled;
+                renderer.size = _worldSpaceSize;
+            }
 
             ManipulateImageTransform(renderer.transform);
         }
-
+        
         private void ManipulateColorTransform(Transform trans)
         {
             trans.parent = _levelTransform.transform;
@@ -90,7 +95,12 @@ private void ManipulateImageTransform(Transform trans)
         {
             LevelBackgroundPosition bgPos = _level.BgPos;
             Vector2 scale = bgPos.UnityScale;
-            Vector2 levelPosition = LDtkCoordConverter.LevelBackgroundImagePosition(bgPos.UnityTopLeftPx, _importer.PixelsPerUnit, _level.PxHei);
+
+            Vector2 levelPosition = new Vector2(0, 0)
+            {
+                x = _worldSpaceSize.x * _level.BgPivotX,
+                y = _worldSpaceSize.y * (1 - _level.BgPivotY)
+            };
 
             trans.parent = _levelTransform.transform;
             trans.localPosition = levelPosition;

diff --git a/Assets/LDtkUnity/Editor/Utility/Artifacts/LDtkBackgroundArtifactFactory.cs b/Assets/LDtkUnity/Editor/Utility/Artifacts/LDtkBackgroundArtifactFactory.cs
@@ -11,7 +11,11 @@ public LDtkBackgroundArtifactFactory(string assetName, Texture2D srcTex, int pix
         {
             Rect rect = lvl.BgPos.UnityCropRect;
             rect.position = LDtkCoordConverter.LevelBackgroundImageSliceCoord(rect.position, srcTex.height, rect.height);
-            _slicer = new LDtkTextureSpriteSlicer(srcTex, rect, pixelsPerUnit, Vector2.up);
+
+            Vector2 pivot = lvl.UnityBgPivot;
+            pivot.y = 1f - pivot.y; 
+
+            _slicer = new LDtkTextureSpriteSlicer(srcTex, rect, pixelsPerUnit, pivot);
             _assetName = assetName;
         }
 

diff --git a/Assets/LDtkUnity/Runtime/Tools/LDtkCoordConverter.cs b/Assets/LDtkUnity/Runtime/Tools/LDtkCoordConverter.cs
@@ -103,14 +103,6 @@ public static Vector2 EntityPivotOffset(Vector2 pivot, Vector2 size)
             Vector2 offset = Vector2.right * pivotSize.x * -2;
             return pivotSize + offset;
         }
-
-        //always float based; the source background slice is composed of floats
-        public static Vector2 LevelBackgroundImagePosition(Vector2 topLeftPx, int pixelsPerUnit, int levelPxHei)
-        {
-            topLeftPx = NegateY(topLeftPx);
-            topLeftPx += Vector2.up * (levelPxHei);
-            return topLeftPx / pixelsPerUnit;
-        }
 
         public static Rect ImageSlice(Rect pos, int textureHeight)
         {