fix attribute location (#20064)

Author: Mee-gu

cocos/navmesh/CCNavMeshDebugDraw.cpp

@@ -41,8 +41,16 @@ NavMeshDebugDraw::NavMeshDebugDraw()
     _locMVP = _programState->getUniformLocation("u_MVPMatrix");
 
     auto vertexLayout = _programState->getVertexLayout();
-    vertexLayout->setAttribute("a_position", 0, backend::VertexFormat::FLOAT3, offsetof(V3F_C4F, position), false);
-    vertexLayout->setAttribute("a_color", 1, backend::VertexFormat::FLOAT4, offsetof(V3F_C4F, color), false);
+    vertexLayout->setAttribute("a_position", 
+                                _programState->getAttributeLocation("a_position"),
+                                backend::VertexFormat::FLOAT3,
+                                offsetof(V3F_C4F, position), 
+                                false);
+    vertexLayout->setAttribute("a_color", 
+                                _programState->getAttributeLocation("a_color"), 
+                                backend::VertexFormat::FLOAT4, 
+                                offsetof(V3F_C4F, color), 
+                                false);
     vertexLayout->setLayout(sizeof(V3F_C4F));
 
     _beforeCommand.func = CC_CALLBACK_0(NavMeshDebugDraw::onBeforeVisitCmd, this);