你甚至可以将你的视点设置成大家熟知的3ds max，如果你更喜欢在这个体系下工作的话。
You can even set your view to one known from 3ds max if you prefer to work with that scheme.
或者设置局部变量然后使用xsl： for - each来为内部计算改变视点。
Alternately, you set the local variable and used XSL: for-each to change the point of view for an inner calculation.
当指定表达式的值改变时，监视点将中断程序执行，但必须在表达式中所使用的变量在作用域中时设置监视点。
A watchpoint will break program execution when the specified expression changes value, but it must be set when the variables used in the expression are in scope.
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