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相信很多人在使用MAX的时候，经常会用到布尔运算吧！今天我就来说说布尔运算一些应该注意的事项
（1）布尔运算物体表面应该完全闭合，没有空洞，重叠的面或未焊接的顶
（2）运算过程中物体的法线方向应该统一，可通过Normal或者Edit mesh修改器统一法线方向
（3）对后格物体进行布尔运算时,一条边界的表面必须具有两个顶点,一条边界只能共享两个表面
在我以前用布尔运算做大楼窗户的时候,我总是在完成第一次布尔运算以后,去点击morph（变形）命令然后在去做第2次布尔运算，这种做法在制作的过程中是可以的，但是在你保存以后便会发生错误
正确的做法是在完成第一次布尔运算以后，应该去点击（平面图形）或者其他，以至MAX确认第一完成后在进行第2次运算

顶你一个,谢谢你的资料!

I felt a moment of fear as Mortimer spoke these words.Holmes sat forward in his excitement,and his eyes showed he was very interested indeed.

'Why did nobody else see these footprints?'he asked.

'The footprints were about twenty metres from the body,and nobody thought of looking so far away,'Mortimer replied.

'Are there many sheep dogs on the moor?'asked Holmes.

'Yes,but this was no sheep dog.The footprints were very large indeed—enormous,'Mortimer answered.

'But it had not gone near the body?'

'No.'

'What kind of night was it?'Holmes asked.wow gold,

'It was wet and cold,though it wasn't actually raining.'

'Describe the Alley to me.'

'The Alley is a path between two long yew hedges.The hedges are small trees that were planted very close together.They are about four metres high.The distance between the two yew hedges is about seven metres.Down the middle is a path of small stones.The path is about three metres wide,with grass on each side of it.'

'I understand there is a gate through the hedge in one place,'said Holmes.

'Yes,there is a small gate,which leads to the moor.'

'Is there any other opening through the hedge?'

'No.'

'So you can enter or leave the Yew Alley only from the Hall,or through the moor gate?'asked Holmes.

'There is a way out through a summer house at the far end.'

'Had Sir Charles reached the summer house?'

'No.He lay about fifty metres from it,'said Mortimer.wotlk gold,

'Now,Dr Mortimer,this is important.You say that the footprints you saw were on the path and not on the grass?'

'No footprints could show on the grass,'said Mortimer.

'Were they on the same side of the path as the moor gate?'

'Yes.They were.'

'I find that very interesting indeed.Another question:was the moor gate closed?'

'Yes.It was closed and locked.'

'How high is it?'asked Holmes.

'It is just over a metre high.'

'Then anyone could climb over it?'

'Yes.'

'What prints did you see by the moor gate?'

'Sir Charles seems to have stood there for five or ten min utes,'said Mortimer.'I know that because his cigar had burned down and the ash had dropped twice off the end of it.'

'Excellent,'said Holmes.'This man is a very good detective,Watson.'

'Sir Charles had left his footprints all over that little bit of the path where he was standing.I couldn't see any other prints.'wow gold,

Sherlock Holmes hit his knee with his hand angrily.

'I like to look closely at these things myself,'he said.'Oh,Dr Mortimer,why didn't you call me immediately?'

'And you,a man of science,believe that the creature is supernatural—something from another world?'asked Holmes.

'I don't know what to believe,'said Dr Mortimer.

'But you must agree that the footprints were made by a liv ing creature,not a ghost?'

'When the hound first appeared two hundred and fifty years ago,it was real enough to tear out Sir Hugo's throat…but it was a supernatural hellhound,'said Dr Mortimer.

'If you think that Sir Charles' death was caused by some thing supernatural,my detective work can't help you,'said Holmes,rather coldly.

'It is hard to say.Take,for example,the change in the foot prints.Did Sir Charles walk on his toes down the Alley?Only a stupid person is likely to believe that.The truth is he was run ning—running for his life.He ran until his heart stopped and he fell dead.'

'What was he running from?'I asked.

'That is the difficult question,'said Holmes.'I think he was mad with fear before he began to run.He didn't know what he was doing.That explains why he ran away from the house instead of towards it.He was running away from help.The next question:who was he waiting for that night?And why was he waiting in the Yew Alley and not in the house?'

'You think he was waiting for someone?'

And Holmes began to play his violin.He had done all the thinking he could.Now he needed more details of the case to help him.
You think he was waiting for someone?