平面体斜二测的画法  Cabinet  Drawing  of  Planner  Solid

        斜二测的画法与正等测基本相同，区别仅在于两者轴间角与轴向伸缩系数不同。

        The methods of cabinet drawing are similar to isometric drawing. The difference only lies in the axonometric angle and coefficient deformation.

        如图 7-7 所示，斜二测的轴间角∠XOZ＝90°,∠ZOY＝∠XOY＝135°。OZ 轴成垂直位置，OX 轴水平，OY 轴可用 45°三角板配合丁字尺画出。斜二测的轴向伸缩系数 p＝r＝1，q＝0.5。

       The axonometric angles are ∠XOZ＝90°,∠ZOY＝∠XOY＝135°respectively. The axis of OZ is vertical location, the axis of OX is horizontal direction, and the axis of OX can be drawn with the help of set square and T-square. The deformation coefficients are p＝r＝1，q＝0.5 individually.

                             图7-7 斜二测的轴间角和轴向伸缩系数 parameters of cabinet drawing

       因为斜二测的 XOZ 坐标面平行于轴测投影面，所以斜二测的特点是：物体上正平面的斜二测反映实形。图 7-8 所示是用特征面法画柱类基本体斜二测的作图步骤。

      Because the XOZ coordinate planes parallel to axonometric projection plane, the characteristics of cabinet drawing is the front view showing the true shape of object. The construction steps of prisms are shown in fig 7-8.

                      图7-8 用特征面法画柱类基本体斜二测的示例 samples of feature base method

       图 7-9 所示是用叠加法画挡土墙斜二测的作图步骤。The steps described are as follows.

图7-9 用叠加法画物体斜二测的示例 sample of superposition method