Engine中如何按指定角度旋转矢量图层的符号？

【解决办法】：
将二维符号进行旋转使用的接口为IRotationRenderer，将3D符号旋转使用IRotationRenderer2接口，下面分开使用。

1，MapControl中，使用IRotationRenderer接口，指定旋转角度和旋转类型即可。
可参考下面代码：

 IGeoFeatureLayer GeofeatureLayer = featureLayer as IGeoFeatureLayer;

            ISimpleRenderer simpleRenderer = GeofeatureLayer.Renderer as ISimpleRenderer;

            IRotationRenderer rotationRenderer = simpleRenderer as IRotationRenderer;

            rotationRenderer.RotationField = angle;

            rotationRenderer.RotationType = esriSymbolRotationType.esriRotateSymbolGeographic;

            GeofeatureLayer.Renderer = simpleRenderer as IFeatureRenderer;

            axMapControl1.Refresh();

           
2，SceneControl中使用IRotationRenderer2 接口，使用SetSymbolRotation3DExpressions指定旋转字段（表达式），SetSymbolRotation3DFlags指定旋转轴。
可参考下面代码：

IGeoFeatureLayer geoFeatureLayer = featureLayer as IGeoFeatureLayer; 



ISimpleRenderer simpleRenderer = geoFeatureLayer.Renderer as ISimpleRenderer; 

IRotationRenderer2 rotationRenderer = simpleRenderer as IRotationRenderer2; 

rotationRenderer.SetSymbolRotation3DFlags(esriSymbolRotation3DFlags.esriSymbolRotation3DUseExpressionX, esriSymbolRotation3DFlags.esriSymbolRotation3DNone, esriSymbolRotation3DFlags.esriSymbolRotation3DNone); //指定旋转轴 

rotationRenderer.SetSymbolRotation3DExpressions([Angle],,); //Angle为旋转的角度字段 

rotationRenderer.SymbolRotation3DRotationTypeZ = esriSymbolRotationType.esriRotateSymbolGeographic; 

geoFeatureLayer.Renderer = simpleRenderer as IFeatureRenderer;

axSceneControl1.SceneGraph.Invalidate(featureLayer, true, false); 

axSceneControl1.SceneGraph.ActiveViewer.Redraw(true);