modify the perspective view angle to 30

Change-Id: I07b39f8b372368f82137feec3a6d12921fc1ec9f

chart2/source/view/main/GL3DRenderer.cxx

@@ -278,7 +278,7 @@ void OpenGL3DRenderer::init()
     glBufferData(GL_ARRAY_BUFFER, sizeof(boundBoxNormal), boundBoxNormal, GL_STATIC_DRAW);
     glBindBuffer(GL_ARRAY_BUFFER, 0);
 
-    m_fViewAngle = 60.0f;
+    m_fViewAngle = 30.0f;
     m_3DProjection = glm::perspective(m_fViewAngle, (float)m_iWidth / (float)m_iHeight, 0.01f, 6000.0f);
 
     maResources.LoadShaders();