在MO平台上实现图形编辑功能
这两天在做一个MO+VB的小系统，在上学期做的系统基础之上改了改，也差不多够用了，但是这次要求能够有图形的编辑功能。MO本身是没有直接的接口可以调用的，因此就翻了翻资料，硬着头皮拼命找。终于在MO自带的例子当中找到了Edit的代码，它提供的是在一个新建图层上添加对象，删除对象，同时节点的添加，删除和移动。刚一看，还挺兴奋的，总算找到了相关资料（图形编辑的资料网上还是比较少的）。宝贝啊，让我兴奋了挺久的。一运行，感觉还不错。
而我要实现的功能是：从地图中查找要编辑的空间对象（包含点，线，面），然后对该对象进行编辑；能够在该图层上添加相应的类型对象，能够删除对象；
于是兴致高昂地开始啃那么代码，一看就开始犯晕了，它包含了几个类，东西真多！而且我还要针对我的实际情况进行修改。琢磨了大约一天的时间，总算有了点眉目。今天开始动手把功能全部做出来了。说下整体的实现思路：
1.通过空间查询接口选择一个对象（线图层选择线对象，点图层选择点对象，面图层选择面对象）
2.在动态图层上高亮显示编辑的对象以及它的节点，这一步比较复杂，花费了大量的时间。
判断点击的位置是否靠近对象的节点（节点可以通过对象的parts得到），如果是则直接高亮显示对象以及节点，同时用另一种颜色标识该节点用以表示该节点被选中了；否则只是高亮显示对象以及节点。
在这一步实现的过程中，一定要注意很多图层中的对象拥有子对象，即object.parts.count>1;所以我用了两个变量进行控制：m_selPolyPart表示选中节点所在的子对象索引，m_selVertex表示该节点在该子对象点集中的索引；这样就很容易知道选中节点的位置了，下一步移动节点的时候好控制。
3.编辑节点，包括添加节点，删除节点，移动节点。现在只实现了移动节点的功能，效果与arcgis的效果差不多。
处于编辑状态下的对象：
移动对象某些节点后的贴图：
保存编辑后的贴图，已经没有高亮显示：
30 篇评论在 “在MO平台上实现图形编辑功能”
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11/22 2008, 17:00 Say: [回复]
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匿名
08/01 2008, 13:46 Say: [回复]
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匿名
08/01 2008, 13:44 Say: [回复]
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08/01 2008, 13:43 Say: [回复]
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08/01 2008, 13:42 Say: [回复]
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发表评论
I also know that .free online games.Just remember that choosing a Training program
for yourself a.play war games.a college.
free online war games.You will need to know a lot about.
online games.the program and what you really need from a specific Guide Dog
school.
soon as possible.level wow.Just remember that .
mp3 mp4 player.You will need to know .mp3 mp4
player.Below are things you wow.Such as,
mp3 players.I’m going to try to cover the dog
mp3 player.Remember , you will be there .sell wow
gold.1.
buy cheap wow gold.Do you have a specific breed in mind.
buy world of warcraft goldDon’t assume that .
buying wow gold.Is the breed important to you
wow billig gold. 2.
wow gold kauf.Do you require ownership of the dog.
wowgold.3.
günstig wow gold.Does the school do
follow up visits for the graduated team.or wow.Do you feel
more secure .gold wow.4.
wow power leveling.Does the school have a good
reputation.wow level.Try talking with people who
have graduated from the programs.lotro gold.Most won’t
mind answering a few questions.power
level.5.power leveling.Are
you eligible for the schools program.
powerleveling wow.Are you
legally blind or totally blind.
wow leveling.Are you physically able to train
with a dog .wow lvl 70..Will the school
accommodate your level of ability.
We every know that .wow level service. new level 70
characters .mp3 players.
a week in order to .mp3 player. Welfare epics.
wow. Maybe.mp3
players. but having decent gear makes it easier.mp3 player. for many players to
progress.
wow gold. It make some time .
gold wow. play their classes.wow geld.
in a competitive PvP setting.wow gold
paypal. Despite their prizewinning efforts.wowgold. Blizzard has largely .
wow gold günstig.
the creation of a minor league field with .wow power
leveling. The oginal poster .lwow or. A minor league for PvP might
gold wow. in the field.
world of warcraft power leveling. It would also
earmark elite players to.portable mp3 player. only be bracketed with folks .
portable mp3 players. field reqards.
wow lvl. Other flaws mentioned by responders
included the idea.lecteurs mp3. that players .
Once you have the materials.wow gold. you need to sell the items.
wow gold.
This can be the hardest part.wow gold kaufen. or the easiest part.
world of warcraft gold. It all depends on .
wow geld. and what players are wanting.
wow powerlevel. I've found
that .buy wow gold. server until 10 p.m.
wow. server.wow gold.you have scheduled
raids during part of this time.cheap wow gold. That's where the second account comes
in.serveur wow. Make a
macro that.wow europe. You will get a lot
cheapest wow gold. and you'll have stacks of gold .
wow power leveling. When it is not prime time.
wow powerlevelinggold wow. I
recommend that .mp3 players. There are always the odd players .
mp3 player. in the morning.
wow gold. and you want to be able to get to them as
well.mp3 player. Additionally if you have two items the best thing.
zubehoer mp3 player. to do is to put one up on the AH.
wow gold kaufen. and keep the other around to sell via the
trade channel.mp3. netting you a total of 3,000g.
mp4. Do this each week for a month.
wow geld. For me raiding costs
mp3 players. so in the end mp3 player. Not too
bad.
