diff --git a/spine-c/spine-c/src/spine/VertexAttachment.c b/spine-c/spine-c/src/spine/VertexAttachment.c
index 8b6dfea36..14087815e 100644
--- a/spine-c/spine-c/src/spine/VertexAttachment.c
+++ b/spine-c/spine-c/src/spine/VertexAttachment.c
@@ -51,7 +51,7 @@ void spVertexAttachment_computeWorldVertices (spVertexAttachment* self, spSlot*
 	float* vertices;
 	int* bones;
 
-	count += offset;
+	count = offset + (count >> 1) * stride;
 	skeleton = slot->bone->skeleton;
 	deformLength = slot->attachmentVerticesCount;
 	deform = slot->attachmentVertices;
diff --git a/spine-cocos2dx/src/spine/SkeletonRenderer.cpp b/spine-cocos2dx/src/spine/SkeletonRenderer.cpp
index 2fd87e351..061ef5805 100644
--- a/spine-cocos2dx/src/spine/SkeletonRenderer.cpp
+++ b/spine-cocos2dx/src/spine/SkeletonRenderer.cpp
@@ -345,7 +345,7 @@ void SkeletonRenderer::draw (Renderer* renderer, const Mat4& transform, uint32_t
 				triangles.vertCount = attachmentVertices->_triangles->vertCount;
 				memcpy(triangles.verts, attachmentVertices->_triangles->verts, sizeof(cocos2d::V3F_C4B_T2F) * attachmentVertices->_triangles->vertCount);
 				int vertexSizeInFloats = sizeof(cocos2d::V3F_C4B_T2F) / sizeof(float);
-				spVertexAttachment_computeWorldVertices(SUPER(attachment), slot, 0, triangles.vertCount * vertexSizeInFloats, (float*)triangles.verts, 0, vertexSizeInFloats);
+				spVertexAttachment_computeWorldVertices(SUPER(attachment), slot, 0, attachment->super.worldVerticesLength, (float*)triangles.verts, 0, vertexSizeInFloats);
 			} else {
 				trianglesTwoColor.indices = attachmentVertices->_triangles->indices;
 				trianglesTwoColor.indexCount = attachmentVertices->_triangles->indexCount;
@@ -355,7 +355,7 @@ void SkeletonRenderer::draw (Renderer* renderer, const Mat4& transform, uint32_t
 					trianglesTwoColor.verts[i].texCoords = attachmentVertices->_triangles->verts[i].texCoords;
 				}
 				int vertexSizeInFloats = sizeof(V3F_C4B_C4B_T2F) / sizeof(float);
-				spVertexAttachment_computeWorldVertices(SUPER(attachment), slot, 0, trianglesTwoColor.vertCount * vertexSizeInFloats, (float*)trianglesTwoColor.verts, 0, vertexSizeInFloats);
+				spVertexAttachment_computeWorldVertices(SUPER(attachment), slot, 0, attachment->super.worldVerticesLength, (float*)trianglesTwoColor.verts, 0, vertexSizeInFloats);
 			}
 			
 			color.r = attachment->color.r;