From d2c006dfd96797a1a4e777adbf6a16b2b5c6c267 Mon Sep 17 00:00:00 2001
From: NathanSweet <nathan.sweet@gmail.com>
Date: Tue, 16 Apr 2019 19:04:33 +0200
Subject: [PATCH] [libgdx] Rotated mesh region UV loading.

---
 .../spine/attachments/MeshAttachment.java     | 42 ++++++++++++++-----
 1 file changed, 31 insertions(+), 11 deletions(-)

diff --git a/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/attachments/MeshAttachment.java b/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/attachments/MeshAttachment.java
index 513a27ab1..d5decd23a 100644
--- a/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/attachments/MeshAttachment.java
+++ b/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/attachments/MeshAttachment.java
@@ -74,35 +74,55 @@ public class MeshAttachment extends VertexAttachment {
 		float[] regionUVs = this.regionUVs;
 		if (this.uvs == null || this.uvs.length != regionUVs.length) this.uvs = new float[regionUVs.length];
 		float[] uvs = this.uvs;
-		float u, v, width, height;
+		int n = uvs.length;
+		float u = region.getU(), v = region.getV(), width, height;
 		if (region instanceof AtlasRegion) {
 			AtlasRegion region = (AtlasRegion)this.region;
 			float textureWidth = region.getTexture().getWidth(), textureHeight = region.getTexture().getHeight();
-			if (region.rotate) {
-				u = region.getU() - (region.originalHeight - region.offsetY - region.packedWidth) / textureWidth;
-				v = region.getV() - (region.originalWidth - region.offsetX - region.packedHeight) / textureHeight;
+			switch (region.degrees) {
+			case 90:
+				u -= (region.originalHeight - region.offsetY - region.packedWidth) / textureWidth;
+				v -= (region.originalWidth - region.offsetX - region.packedHeight) / textureHeight;
 				width = region.originalHeight / textureWidth;
 				height = region.originalWidth / textureHeight;
-				for (int i = 0, n = uvs.length; i < n; i += 2) {
+				for (int i = 0; i < n; i += 2) {
 					uvs[i] = u + regionUVs[i + 1] * width;
-					uvs[i + 1] = v + height - regionUVs[i] * height;
+					uvs[i + 1] = v + (1 - regionUVs[i]) * height;
+				}
+				return;
+			case 180:
+				u -= (region.originalWidth - region.offsetX - region.packedWidth) / textureWidth;
+				v -= region.offsetY / textureHeight;
+				width = region.originalWidth / textureWidth;
+				height = region.originalHeight / textureHeight;
+				for (int i = 0; i < n; i += 2) {
+					uvs[i] = u + (1 - regionUVs[i]) * width;
+					uvs[i + 1] = v + (1 - regionUVs[i + 1]) * height;
+				}
+				return;
+			case 270:
+				u -= region.offsetY / textureWidth;
+				v -= region.offsetX / textureHeight;
+				width = region.originalHeight / textureWidth;
+				height = region.originalWidth / textureHeight;
+				for (int i = 0; i < n; i += 2) {
+					uvs[i] = u + (1 - regionUVs[i + 1]) * width;
+					uvs[i + 1] = v + regionUVs[i] * height;
 				}
 				return;
 			}
-			u = region.getU() - region.offsetX / textureWidth;
-			v = region.getV() - (region.originalHeight - region.offsetY - region.packedHeight) / textureHeight;
+			u -= region.offsetX / textureWidth;
+			v -= (region.originalHeight - region.offsetY - region.packedHeight) / textureHeight;
 			width = region.originalWidth / textureWidth;
 			height = region.originalHeight / textureHeight;
 		} else if (region == null) {
 			u = v = 0;
 			width = height = 1;
 		} else {
-			u = region.getU();
-			v = region.getV();
 			width = region.getU2() - u;
 			height = region.getV2() - v;
 		}
-		for (int i = 0, n = uvs.length; i < n; i += 2) {
+		for (int i = 0; i < n; i += 2) {
 			uvs[i] = u + regionUVs[i] * width;
 			uvs[i + 1] = v + regionUVs[i + 1] * height;
 		}