global model rotate 曲面整体旋转
With a handheld controller, they can walk through buildings, rotate artifacts, or rise above the model for a bird 's-eye fly-through.
拿着手持式控制器，他们可穿过建筑物，拨动文物，或者以鸟瞰方式纵观整个模型。
By having the model softly rotate the bottoms of her hands towards the camera and break the wrists and hands up, the hands look more feminine and show less tension.
当模特轻松的旋转她手臂的下部，双手朝向镜头，朝上弯曲手腕的时候，这样的手看起来更有女人味更放松。
Use the SDK's position tracking and head model to ensure the virtual cameras rotate and move in a manner consistent with head and body movements; discrepancies are discomforting.
使用SDK的位置跟踪和头部模型以确保虚拟摄像机旋转和移动能够符合头和身体的动作习惯；而这一点如果做的不够好就会让用户产生不适感。
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