[libgdx] Fixed shear causing physics to explode.

spine-libgdx/spine-libgdx-tests/src/com/esotericsoftware/spine/PhysicsTest2.java

@@ -36,8 +36,7 @@ import com.badlogic.gdx.backends.lwjgl3.Lwjgl3Application;
 import com.badlogic.gdx.graphics.GL20;
 import com.badlogic.gdx.graphics.OrthographicCamera;
 import com.badlogic.gdx.graphics.g2d.TextureAtlas;
-import com.badlogic.gdx.math.Vector2;
-import com.badlogic.gdx.utils.FloatArray;
+
 import com.esotericsoftware.spine.Skeleton.Physics;
 import com.esotericsoftware.spine.utils.TwoColorPolygonBatch;
 
@@ -80,16 +79,15 @@ public class PhysicsTest2 extends ApplicationAdapter {
 			public boolean touchDown (int screenX, int screenY, int pointer, int button) {
 				lastX = screenX;
 				lastY = screenY;
-				return false;
+				return true;
 			}
 
-			@Override
-			public boolean touchDragged(int screenX, int screenY, int pointer) {
+			public boolean touchDragged (int screenX, int screenY, int pointer) {
 				skeleton.x += screenX - lastX;
 				skeleton.y += lastY - screenY;
 				lastX = screenX;
 				lastY = screenY;
-				return false;
+				return true;
 			}
 		});
 	}

spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/PhysicsConstraint.java

@@ -166,7 +166,7 @@ public class PhysicsConstraint implements Updatable {
 				if (rotateOrShearX || scaleX) {
 					float ca = atan2(bone.c, bone.a), c, s, mr = 0;
 					if (rotateOrShearX) {
-						mr = mix * data.rotate;
+						mr = (data.rotate + data.shearX) * mix;
 						float dx = cx - bone.worldX, dy = cy - bone.worldY, r = atan2(dy + ty, dx + tx) - ca - rotateOffset * mr;
 						rotateOffset += (r - (float)Math.ceil(r * invPI2 - 0.5f) * PI2) * i;
 						r = rotateOffset * mr + ca;