转自:http://hi.baidu.com/ych1219553/blog/item/a4efbb245ce69c034d088d06.html#send
关于ArcGIS的三维
解决方案,用过ArcScene的朋友,应该是深有体会的了。。。当然我们也看到很多朋友在网上发布了很多三维处理效果图,真是让人兴奋不已
呀。。。在这里我也把自己的所做的一些基于ArcGIS Engine的三维场景的动画轨迹的录制解决方法,跟大家共享!希望我的心血
能为大家提供一点帮助
!
在ArcGIS的接口里,提供了IAnimationTracks,通过它我们可以实现三维动画轨迹的创建,删除或在播放当前轨迹的三维场景效果,进而可以生成三维场景的录像输出处理方法(这个我在下一篇再给大家介绍),还是看看具体实现代码吧--
///
/// 创建动画轨迹
///
public void CreateAnimationTrack( string trackName )
{
IAnimationTrack pAnimationTrack = new AnimationTrackClass();
IAnimationType pAnimationType = new AnimationTypeCameraClass();
pAnimationTrack.AnimationType = pAnimationType;
pAnimationTrack.Name = trackName;
pAnimationTrack.AttachObject( pSceneGraph.ActiveViewer.Camera );
pAnimationTrack.ApplyToAllViewers = true;
pAnimationTrack.EvenTimeStamps = false;
pAnimationTracks.AddTrack( pAnimationTrack );
}
///
/// 删除动画轨迹
///
public void RemoveAnimationTrack( string trackName )
{
IAnimationTrack pAnimationTrack;
pAnimationTracks.FindTrack( trackName, out pAnimationTrack );
pAnimationTracks.RemoveTrack( pAnimationTrack );
}
///
/// 播放当前动画轨迹
///
public void PlayAnimationTrack( string trackName )
{
Hashtable htKeyTime = null;
bool[] TracksEnable = new Boolean[pAnimationTracks.TrackCount];
IAnimationTrack pAnimationTrack;
for( int index = 0; index < pAnimationTracks.TrackCount; index++ )
{
pAnimationTrack = pAnimationTracks.Tracks.get_Element( index ) as IAnimationTrack;
TracksEnable[index] = pAnimationTrack.IsEnabled;
if( pAnimationTrack.Name == trackName )
{
pAnimationTrack.IsEnabled = true;
htKeyTime = ClsAnimationTracks.GetKeyTimeTable( pAnimationTrack.Name );
}
else
pAnimationTrack.IsEnabled = false;
}
int sumTime = 0;
foreach( object obj in htKeyTime.Values )
{
sumTime += Convert.ToInt32( obj );
}
double duration = (double)sumTime / 1000;
TimeSpan timeSpan;
double elapsedTime;
DateTime startTime = DateTime.Now;
int j = 0;
do
{
timeSpan = (DateTime.Now).Subtract(startTime);
elapsedTime = timeSpan.TotalSeconds;
if (elapsedTime > duration) elapsedTime = duration;
pAnimationTracks.ApplyTracks(pSceneGraph.ActiveViewer, elapsedTime, duration);
pSceneGraph.RefreshViewers();
j = j + 1;
}
for( int index = 0; index < pAnimationTracks.TrackCount; index++ )
{
pAnimationTrack = pAnimationTracks.Tracks.get_Element( index ) as IAnimationTrack;
pAnimationTrack.IsEnabled = TracksEnable[index];
}
}
是不是很简单呢?记住哟,在播放轨迹的时候,有个时间的处理方法,具体在程序调试时,多试几次就知道是怎么回事了,我就不多说了。。。
当然,还有动画帧的处理方法,ArcGIS也提供了一个很方便的接口IKeyframe来实现的,再通过动画轨迹接口IAnimationTrack来实现动画帧的创建,删除等功能,代码实现如下:
///
/// 创建动画帧
///
public void CreateKeyFrame( IAnimationTrack pAnimationTrack, string keyName, int timeSpan )
{
IKeyframe pKeyframe = new Bookmark3DClass();
pKeyframe.Name = keyName;
pKeyframe.CaptureProperties( pScene, pSceneGraph.ActiveViewer.Camera );
pAnimationTrack.InsertKeyframe( pKeyframe, pAnimationTrack.KeyframeCount );
Hashtable htKeyTime = ClsAnimationTracks.GetKeyTimeTable( pAnimationTrack.Name );
int sumTime = 0;
foreach( object obj in htKeyTime.Values )
{
sumTime += Convert.ToInt32( obj );
}
double dblTime = 0;
for( int index = 0; index < pAnimationTrack.KeyframeCount; index++ )
{
pKeyframe = pAnimationTrack.get_Keyframe( index );
dblTime += Convert.ToDouble( htKeyTime[pKeyframe.Name] ) / sumTime;
pKeyframe.TimeStamp = dblTime;
}
}
///
/// 删除动画帧
///
public void RemoveKeyFrame( IAnimationTrack pAnimationTrack, string keyName )
{
for( int index = 0; index < pAnimationTrack.KeyframeCount; index++ )
{
if( pAnimationTrack.get_Keyframe( index ).Name == keyName )
{
pAnimationTrack.RemoveKeyframe( index );
break;
}
}
}
///
/// 删除当前轨迹的所有帧
///
public void RemoveAllKeyFrame( IAnimationTrack pAnimationTrack )
{
pAnimationTrack.RemoveAllKeyframes();
}
不知道大家对这些实现方法了解得多少?多多提意见哟。。。