From 484cc0e25525c2b555db418e07537b0f0fd7e214 Mon Sep 17 00:00:00 2001
From: "Mr. Ai" <airuike@dnbrown.net>
Date: Thu, 16 Oct 2025 04:18:42 -0400
Subject: [PATCH] Fix DrawBillboardPro so that flipped images that are sampling
 from part of a larger texture still draw from the same source rectangle
 (#5276)

Co-authored-by: Violently <violently@violently.violently>
---
 src/rmodels.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/rmodels.c b/src/rmodels.c
index 3a5cc9004..3c904c396 100644
--- a/src/rmodels.c
+++ b/src/rmodels.c
@@ -3904,14 +3904,14 @@ void DrawBillboardPro(Camera camera, Texture2D texture, Rectangle source, Vector
     // Flip the content of the billboard while maintaining the counterclockwise edge rendering order
     if (size.x < 0.0f)
     {
-        source.x += size.x;
+        source.x -= size.x;
         source.width *= -1.0;
         right = Vector3Negate(right);
         origin.x *= -1.0f;
     }
     if (size.y < 0.0f)
     {
-        source.y += size.y;
+        source.y -= size.y;
         source.height *= -1.0;
         up = Vector3Negate(up);
         origin.y *= -1.0f;