graphics: update SpriteBatch and TextureArraySpriteBatch projection m…

…atrix to assume y-down (#236)
littlektframework · Mar 24, 2024 · 1306470 · 1306470
1 parent 25b9d4e
commit 1306470
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Showing 2 changed files with 6 additions and 6 deletions.
diff --git a/core/src/commonMain/kotlin/com/lehaine/littlekt/graphics/g2d/SpriteBatch.kt b/core/src/commonMain/kotlin/com/lehaine/littlekt/graphics/g2d/SpriteBatch.kt
@@ -73,11 +73,11 @@ class SpriteBatch(
     override var projectionMatrix = Mat4().setToOrthographic(
         left = 0f,
         right = context.graphics.width.toFloat(),
-        bottom = 0f,
-        top = context.graphics.height.toFloat(),
+        bottom = context.graphics.height.toFloat(),
+        top = 0f,
         near = -1f,
         far = 1f
-    )
+    ).translate(0f, -context.graphics.height * 0.5f, 0f)
         set(value) {
             if (_drawing) {
                 flush()

diff --git a/core/src/commonMain/kotlin/com/lehaine/littlekt/graphics/g2d/TextureArraySpriteBatch.kt b/core/src/commonMain/kotlin/com/lehaine/littlekt/graphics/g2d/TextureArraySpriteBatch.kt
@@ -94,11 +94,11 @@ class TextureArraySpriteBatch(
     override var projectionMatrix = Mat4().setToOrthographic(
         left = 0f,
         right = context.graphics.width.toFloat(),
-        bottom = 0f,
-        top = context.graphics.height.toFloat(),
+        bottom = context.graphics.height.toFloat(),
+        top = 0f,
         near = -1f,
         far = 1f
-    )
+    ).translate(0f, -context.graphics.height * 0.5f, 0f)
         set(value) {
             if (_drawing) {
                 flush()