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Three Dimensions(三维) 1：The locations in the scene graph are defined using X, Y and Z coordinates(场景图中位置定义用XYZ) 2：Y is upwards, X is right and Z is towards you(比较适合左手定则，手心对着自己就是z轴，大拇指是y轴，四指指向x轴) |
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a spatial with a zero location and rotation（一个空间有0点坐标和旋转）
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you can move the spatial using e.g.
spatial.move(1, 1, 0);
the spatial has moved (translated) along the x and y axes
沿x和y轴的移动空间
you can rotate the spatial around the z axis by using e.g.
spatial.rotate(0, 0, FastMath.HALF_PI);好像是轴旋转半π
you can scale the spatial by using e.g. 缩放效果
spatial.scale(2);