平截 meaning in English

truncation

If a vertex is inside of the viewing frustum , its screen coordinates are computed
如果顶点在视锥平截体内部，则会计算其屏幕坐标。
Faces can be culled using a number of techniques including : back face , view frustum , and occlusion culling
剔除平面的技术有很多，其中包括：背面剔除、视锥平截体剔除和封闭剔除。
If the vertex is outside of the viewing frustum , it is stored in the destination vertex buffer in projection space coordinates
如果顶点在视锥平截体外部，则会以投影空间坐标的形式将其存储在目标顶点缓冲区中。
These algorithms also include the terrain texture generation algorithms and the frustum culling algorithms . the mathematic model of flight simulation was discussed in chapter four . in chapter five
这一章还介绍了地形纹理的生成算法，视图平截头体选取算法，这些算法使得计算机可以用来处理大规模的可视化工作。