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画出中间圆锥的高度和宽度
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画出圆锥的形之后,再把中间横的圆柱画出来,可先找出它的中轴线然后确定他的位置
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测量出两边的长度,画出边上的斜面
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从方形的斜面再画出椭圆的形状
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后面的边线用同样的方法画出
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先找出左边的圆锥和右边的圆柱的高
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确定出它们的长和宽
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将她们的圆切面先画出方形的轮廓辅助线
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在里面找出不同透视的椭圆形
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把辅助线擦掉,画上投影和明暗交界线,然后排线区别出大的明暗关系
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用3B从投影开始加深,画出每部分的深浅变化
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然后从左到右逐渐变浅,并画上背景
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继续用4B从左到右加深暗部,并从明暗交界线往亮部过渡
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再用回3B画出明暗交界线往亮部的灰面
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再用3B加上背景
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最后再用5B,6B整体加深