code: @Deprecated
  	public void setCombinedMatrix(Matrix4 combined) {
  		System.arraycopy(combined.val, 0, this.combined.val, 0, 16);
  
  		// updateCameraCorners
  		float invWidth = combined.val[Matrix4.M00];
  
  		final float halfViewPortWidth = 1f / invWidth;
  		final float x = -halfViewPortWidth * combined.val[Matrix4.M03];
  		x1 = x - halfViewPortWidth;
  		x2 = x + halfViewPortWidth;
  
  		float invHeight = combined.val[Matrix4.M11];
  
  		final float halfViewPortHeight = 1f / invHeight;
  		final float y = -halfViewPortHeight * combined.val[Matrix4.M13];
  		y1 = y - halfViewPortHeight;
  		y2 = y + halfViewPortHeight;
  
  	}
docs: Sets combined camera matrix.
  
  <p>Matrix must be set to work in box2d coordinates, it will be copied
  and used for culling and rendering. Remember to update it if camera
  changes. This will work with rotated cameras.
  
  <p>NOTE: Matrix4 is assumed to be orthogonal for culling
  and directional lights.
  
  @param combined
  matrix that include projection and translation matrices
  
  @deprecated use {@link #setCombinedMatrix(OrthographicCamera)} or
  {@link #setCombinedMatrix(Matrix4, float, float, float, float)} instead