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勾形是绘画非常重要的一个步骤,掌握正确的观察方法是其核心,把石膏几何体的形体限定在矩形框中,观察边框横向和纵向的比例关系即可确定形体大的比例关系以及各局部的比例和位置关系,从而准确勾出对象的形体特征。
The shape of the gypsum geometry is limited to a rectangular frame. Observe the proportionate relationship between the horizontal and the vertical directions of the frame to determine the large proportion of the shape and the relationship between the local Proportions and location, so as to accurately outline the physical characteristics of the object.