文档介绍：美术理论基础知识
actively carry out the law on civil air defense education, drawn out of the air defense in Pingliang cion, overfulfilled the province upper and lower knots of up to 500,000 yuan fee collection tasks. 5, further standardize internal management, improve staff quality. Adhere to the
actively carry out the law on civil air defense education, drawn out of the air defense in Pingliang city Building under easy fare, daily special inspection and regulation, overfulfilled the province upper and lower knots of up to 500,000 yuan fee collection tasks. 5, further standardize internal management, improve staff quality. Adhere to the
平面构成的框架一切用于平面构成中的可见的视觉元素，通称形象，基本形即是最基本的形象；限制和管辖基本形在平面构成中的各种不同的编排，即是骨格。基本形有“正”有“负”，构成中亦可互相转化；基本形相遇时，又可以产生分离、接触、复叠、透叠、联合、减缺、差叠、重合等几种关系。骨格可以分为：在视觉上起作用的有作用骨格和在视觉上不起作用的无作用骨格，以及有规律性骨格(即重复、近似、渐变、发射等骨格)和非规律性骨格(即密集、对比等骨格)。基本形与骨格的上述这些特性，将相互影响、相互制约、相互作用而构成千变万化的构成图案（如下图，就是由基本形通过重复、接触、差叠等构成的）。
美术理论基础知识——绘画工具及其使用
1、用笔的要求
画素描用铅笔、钢笔、毛笔、炭笔都可以。但初学者还是用铅笔更好些。由于铅笔的笔心有软硬深浅之分，又能削的很尖，便于深入细致的刻画。“B”代表铅笔芯的软硬度，“B”前面的数字越大表示铅笔越软，色越浓；“H”表示铅笔芯的硬度，“H”前面的数字越大，表示铅笔越硬、越淡。画铅笔素描的铅笔可选用HB至4B之间。4B-3B常常用来画暗部和画面上最暗的地方；2B-B一般用来画灰调子；HB 画亮部。不过有很多人画素描就用2B 铅笔，通过施力的大小变化来改变深浅。
actively carry out the law on civil air defense education, drawn out of the air defense in Pingliang city Building under easy fare, daily special inspection and regulation, overfulfilled the province upper and lower knots of up to 500,000 yuan fee collection tasks. 5, further standardize internal management, improve staff quality. Adhere to the
actively carry out the law on civil air defense education, drawn out of the air defense in Pingliang city Building under easy fare, daily special inspection and regulation, overfulfilled the province upper and lower knots of up to 500,000 yuan fee collection tasks. 5, further standardize internal management, improve staff quality. Adhere to the
actively carry out the law on civil air defense education, drawn out of the air defense in Pingliang city Buil